import OpenAI from 'openai';
import { OpenAIError, APIConnectionError } from 'openai/error';
import { PassThrough } from 'stream';
import {
  ParsingToolFunction,
  type ChatCompletionRunner,
  type ChatCompletionToolRunnerParams,
  ChatCompletionStreamingRunner,
  type ChatCompletionStreamingToolRunnerParams,
} from 'openai/resources/chat/completions';
import type { ChatCompletionMessageParam } from 'openai/resources/chat/completions';
import { isAssistantMessage } from '../../src/lib/chatCompletionUtils';
import { mockFetch } from '../utils/mock-fetch';

// mockChatCompletionFetch is like mockFetch, but with better a more convenient handleRequest to mock
// chat completion request/responses.
function mockChatCompletionFetch() {
  const { fetch, handleRequest: handleRawRequest } = mockFetch();

  function handleRequest(
    handler: (body: ChatCompletionToolRunnerParams<any[]>) => Promise<OpenAI.Chat.ChatCompletion>,
  ): Promise<void> {
    return handleRawRequest(async (req, init) => {
      const rawBody = init?.body;
      if (typeof rawBody !== 'string') throw new Error(`expected init.body to be a string`);
      const body: ChatCompletionToolRunnerParams<any[]> = JSON.parse(rawBody);
      return new Response(JSON.stringify(await handler(body)), {
        headers: { 'Content-Type': 'application/json' },
      });
    });
  }
  return { fetch, handleRequest };
}

// mockStreamingChatCompletionFetch is like mockFetch, but with better a more convenient handleRequest to mock
// streaming chat completion request/responses.
function mockStreamingChatCompletionFetch() {
  const { fetch, handleRequest: handleRawRequest } = mockFetch();

  function handleRequest(
    handler: (
      body: ChatCompletionStreamingToolRunnerParams<any[]>,
    ) => AsyncIterable<OpenAI.Chat.ChatCompletionChunk>,
  ): Promise<void> {
    return handleRawRequest(async (req, init) => {
      const rawBody = init?.body;
      if (typeof rawBody !== 'string') throw new Error(`expected init.body to be a string`);
      const body: ChatCompletionStreamingToolRunnerParams<any[]> = JSON.parse(rawBody);
      const stream = new PassThrough();
      (async () => {
        for await (const chunk of handler(body)) {
          stream.write(`data: ${JSON.stringify(chunk)}\n\n`);
        }
        stream.end(`data: [DONE]\n\n`);
      })();
      return new Response(stream, {
        headers: {
          'Content-Type': 'text/event-stream',
          'Transfer-Encoding': 'chunked',
        },
      });
    });
  }
  return { fetch, handleRequest };
}

// contentChoiceDeltas returns an async iterator which mocks a delta stream of a by splitting the
// argument into chunks separated by whitespace.
function* contentChoiceDeltas(
  content: string,
  {
    index = 0,
    role = 'assistant',
  }: { index?: number; role?: NonNullable<OpenAI.Chat.ChatCompletionChunk.Choice.Delta['role']> } = {},
): Iterable<OpenAI.Chat.Completions.ChatCompletionChunk.Choice> {
  const deltas = content.split(/\s+/g);
  for (let i = 0; i < deltas.length; i++) {
    yield {
      index,
      finish_reason: i === deltas.length - 1 ? 'stop' : null,
      logprobs: null,
      delta: {
        role,
        content: deltas[i] ? `${deltas[i]}${i === deltas.length - 1 ? '' : ' '}` : null,
      },
    };
  }
}

// functionCallDeltas returns an async iterator which mocks a delta stream of a functionCall by splitting
// the argument into chunks separated by whitespace.
function* functionCallDeltas(
  args: string,
  {
    index = 0,
    id = '123',
    name,
    role = 'assistant',
  }: {
    name: string;
    id?: string;
    index?: number;
    role?: NonNullable<OpenAI.Chat.ChatCompletionChunk.Choice.Delta['role']>;
  },
): Iterable<OpenAI.Chat.Completions.ChatCompletionChunk.Choice> {
  const deltas = args.split(/\s+/g);
  for (let i = 0; i < deltas.length; i++) {
    yield {
      index,
      finish_reason: i === deltas.length - 1 ? 'function_call' : null,
      delta: {
        role,
        tool_calls: [
          {
            type: 'function',
            index: 0,
            id,
            function: {
              arguments: `${deltas[i] || ''}${i === deltas.length - 1 ? '' : ' '}`,
              ...(i === deltas.length - 1 ? { name } : null),
            },
          },
        ],
      },
    };
  }
}

class RunnerListener {
  readonly contents: string[] = [];
  readonly messages: ChatCompletionMessageParam[] = [];
  readonly chatCompletions: OpenAI.Chat.ChatCompletion[] = [];
  readonly functionCalls: OpenAI.Chat.ChatCompletionMessageFunctionToolCall.Function[] = [];
  readonly functionCallResults: string[] = [];
  finalContent: string | null = null;
  finalMessage: ChatCompletionMessageParam | undefined;
  finalChatCompletion: OpenAI.Chat.ChatCompletion | undefined;
  finalFunctionCall: OpenAI.Chat.ChatCompletionMessageFunctionToolCall.Function | undefined;
  finalFunctionCallResult: string | undefined;
  totalUsage: OpenAI.CompletionUsage | undefined;
  error: OpenAIError | undefined;
  gotConnect = false;
  gotAbort = false;
  gotEnd = false;

  onceMessageCallCount = 0;

  constructor(public runner: ChatCompletionRunner<any>) {
    runner
      .on('connect', () => (this.gotConnect = true))
      .on('content', (content) => this.contents.push(content))
      .on('message', (message) => this.messages.push(message))
      .on('chatCompletion', (completion) => this.chatCompletions.push(completion))
      .on('functionToolCall', (functionCall) => this.functionCalls.push(functionCall))
      .on('functionToolCallResult', (result) => this.functionCallResults.push(result))
      .on('finalContent', (content) => (this.finalContent = content))
      .on('finalMessage', (message) => (this.finalMessage = message))
      .on('finalChatCompletion', (completion) => (this.finalChatCompletion = completion))
      .on('finalFunctionToolCall', (functionCall) => (this.finalFunctionCall = functionCall))
      .on('finalFunctionToolCallResult', (result) => (this.finalFunctionCallResult = result))
      .on('totalUsage', (usage) => (this.totalUsage = usage))
      .on('error', (error) => (this.error = error))
      .on('abort', (error) => ((this.error = error), (this.gotAbort = true)))
      .on('end', () => (this.gotEnd = true))
      .once('message', () => this.onceMessageCallCount++);
  }

  async sanityCheck({ error }: { error?: string } = {}) {
    expect(this.onceMessageCallCount).toBeLessThanOrEqual(1);
    expect(this.gotAbort).toEqual(this.runner.aborted);
    if (this.runner.aborted) expect(this.runner.errored).toBe(true);
    if (error) {
      expect(this.error?.message).toEqual(error);
      expect(this.runner.errored).toBe(true);
      await expect(this.runner.finalChatCompletion()).rejects.toThrow(error);
      await expect(this.runner.finalMessage()).rejects.toThrow(error);
      await expect(this.runner.finalContent()).rejects.toThrow(error);
      await expect(this.runner.finalFunctionToolCall()).rejects.toThrow(error);
      await expect(this.runner.finalFunctionToolCallResult()).rejects.toThrow(error);
      await expect(this.runner.totalUsage()).rejects.toThrow(error);
      await expect(this.runner.done()).rejects.toThrow(error);
    } else {
      expect(this.error).toBeUndefined();
      expect(this.runner.errored).toBe(false);
    }

    if (!this.gotConnect) {
      expect(this.contents).toEqual([]);
      expect(this.messages).toEqual([]);
      expect(this.chatCompletions).toEqual([]);
      expect(this.functionCalls).toEqual([]);
      expect(this.functionCallResults).toEqual([]);
      expect(this.finalContent).toBeUndefined();
      expect(this.finalMessage).toBeUndefined();
      expect(this.finalChatCompletion).toBeUndefined();
      expect(this.finalFunctionCall).toBeUndefined();
      expect(this.finalFunctionCallResult).toBeUndefined();
      expect(this.totalUsage).toBeUndefined();
      expect(this.gotEnd).toBe(true);
      return;
    }

    if (error) return;

    const expectedContents = this.messages
      .filter(isAssistantMessage)
      .map((m) => m.content as string)
      .filter(Boolean);
    expect(this.contents).toEqual(expectedContents);
    expect(this.finalMessage).toEqual([...this.messages].reverse().find((x) => x.role === 'assistant'));
    expect(await this.runner.finalMessage()).toEqual(this.finalMessage);
    expect(this.finalContent).toEqual(expectedContents[expectedContents.length - 1] ?? null);
    expect(await this.runner.finalContent()).toEqual(this.finalContent);
    expect(this.finalChatCompletion).toEqual(this.chatCompletions[this.chatCompletions.length - 1]);
    expect(await this.runner.finalChatCompletion()).toEqual(this.finalChatCompletion);
    expect(this.finalFunctionCall).toEqual(this.functionCalls[this.functionCalls.length - 1]);
    expect(await this.runner.finalFunctionToolCall()).toEqual(this.finalFunctionCall);
    expect(this.finalFunctionCallResult).toEqual(
      this.functionCallResults[this.functionCallResults.length - 1],
    );
    expect(await this.runner.finalFunctionToolCallResult()).toEqual(this.finalFunctionCallResult);
    expect(this.chatCompletions).toEqual(this.runner.allChatCompletions());
    expect(this.messages).toEqual(this.runner.messages.slice(-this.messages.length));
    if (this.chatCompletions.some((c) => c.usage)) {
      const totalUsage: OpenAI.CompletionUsage = {
        completion_tokens: 0,
        prompt_tokens: 0,
        total_tokens: 0,
      };
      for (const { usage } of this.chatCompletions) {
        if (usage) {
          totalUsage.completion_tokens += usage.completion_tokens;
          totalUsage.prompt_tokens += usage.prompt_tokens;
          totalUsage.total_tokens += usage.total_tokens;
        }
      }
      expect(this.totalUsage).toEqual(totalUsage);
      expect(await this.runner.totalUsage()).toEqual(totalUsage);
    }

    expect(this.gotEnd).toBe(true);
  }
}

class StreamingRunnerListener {
  readonly eventChunks: OpenAI.Chat.ChatCompletionChunk[] = [];
  readonly eventContents: [string, string][] = [];
  readonly eventMessages: ChatCompletionMessageParam[] = [];
  readonly eventChatCompletions: OpenAI.Chat.ChatCompletion[] = [];
  readonly eventFunctionCalls: OpenAI.Chat.ChatCompletionMessageFunctionToolCall.Function[] = [];
  readonly eventFunctionCallResults: string[] = [];

  finalContent: string | null = null;
  finalMessage: ChatCompletionMessageParam | undefined;
  finalChatCompletion: OpenAI.Chat.ChatCompletion | undefined;
  finalFunctionCall: OpenAI.Chat.ChatCompletionMessageFunctionToolCall.Function | undefined;
  finalFunctionCallResult: string | undefined;
  error: OpenAIError | undefined;
  gotConnect = false;
  gotEnd = false;

  constructor(public runner: ChatCompletionStreamingRunner<any>) {
    runner
      .on('connect', () => (this.gotConnect = true))
      .on('chunk', (chunk) => this.eventChunks.push(chunk))
      .on('content', (delta, snapshot) => this.eventContents.push([delta, snapshot]))
      .on('message', (message) => this.eventMessages.push(message))
      .on('chatCompletion', (completion) => this.eventChatCompletions.push(completion))
      .on('functionToolCall', (functionCall) => this.eventFunctionCalls.push(functionCall))
      .on('functionToolCallResult', (result) => this.eventFunctionCallResults.push(result))
      .on('finalContent', (content) => (this.finalContent = content))
      .on('finalMessage', (message) => (this.finalMessage = message))
      .on('finalChatCompletion', (completion) => (this.finalChatCompletion = completion))
      .on('finalFunctionToolCall', (functionCall) => (this.finalFunctionCall = functionCall))
      .on('finalFunctionToolCallResult', (result) => (this.finalFunctionCallResult = result))
      .on('error', (error) => (this.error = error))
      .on('abort', (abort) => (this.error = abort))
      .on('end', () => (this.gotEnd = true));
  }

  async sanityCheck({ error }: { error?: string } = {}) {
    if (error) {
      expect(this.error?.message).toEqual(error);
      expect(this.runner.errored).toBe(true);
      await expect(this.runner.finalChatCompletion()).rejects.toThrow(error);
      await expect(this.runner.finalMessage()).rejects.toThrow(error);
      await expect(this.runner.finalContent()).rejects.toThrow(error);
      await expect(this.runner.finalFunctionToolCall()).rejects.toThrow(error);
      await expect(this.runner.finalFunctionToolCallResult()).rejects.toThrow(error);
      await expect(this.runner.done()).rejects.toThrow(error);
    } else {
      expect(this.error).toBeUndefined();
      expect(this.runner.errored).toBe(false);
    }

    if (!this.gotConnect) {
      expect(this.eventContents).toEqual([]);
      expect(this.eventMessages).toEqual([]);
      expect(this.eventChatCompletions).toEqual([]);
      expect(this.eventFunctionCalls).toEqual([]);
      expect(this.eventFunctionCallResults).toEqual([]);
      expect(this.finalContent).toBeUndefined();
      expect(this.finalMessage).toBeUndefined();
      expect(this.finalChatCompletion).toBeUndefined();
      expect(this.finalFunctionCall).toBeUndefined();
      expect(this.finalFunctionCallResult).toBeUndefined();
      expect(this.gotEnd).toBe(true);
      return;
    }

    if (error) return;

    if (this.eventContents.length) expect(this.eventChunks.length).toBeGreaterThan(0);
    expect(this.finalMessage).toEqual([...this.eventMessages].reverse().find((x) => x.role === 'assistant'));
    expect(await this.runner.finalMessage()).toEqual(this.finalMessage);
    expect(this.finalContent).toEqual(this.eventContents[this.eventContents.length - 1]?.[1] ?? null);
    expect(await this.runner.finalContent()).toEqual(this.finalContent);
    expect(this.finalChatCompletion).toEqual(this.eventChatCompletions[this.eventChatCompletions.length - 1]);
    expect(await this.runner.finalChatCompletion()).toEqual(this.finalChatCompletion);
    expect(this.finalFunctionCall).toEqual(this.eventFunctionCalls[this.eventFunctionCalls.length - 1]);
    expect(await this.runner.finalFunctionToolCall()).toEqual(this.finalFunctionCall);
    expect(this.finalFunctionCallResult).toEqual(
      this.eventFunctionCallResults[this.eventFunctionCallResults.length - 1],
    );
    expect(await this.runner.finalFunctionToolCallResult()).toEqual(this.finalFunctionCallResult);
    expect(this.eventChatCompletions).toEqual(this.runner.allChatCompletions());
    expect(this.eventMessages).toEqual(this.runner.messages.slice(-this.eventMessages.length));
    if (error) {
      expect(this.error?.message).toEqual(error);
      expect(this.runner.errored).toBe(true);
    } else {
      expect(this.error).toBeUndefined();
      expect(this.runner.errored).toBe(false);
    }
    expect(this.gotEnd).toBe(true);
  }
}

function _typeTests() {
  const openai = new OpenAI();

  openai.chat.completions.runTools({
    messages: [
      { role: 'user', content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}' },
    ],
    model: 'gpt-3.5-turbo',
    tools: [
      {
        type: 'function',
        function: {
          name: 'numProperties',
          function: (obj: object) => String(Object.keys(obj).length),
          parameters: { type: 'object' },
          parse: (str: string): object => {
            const result = JSON.parse(str);
            if (!(result instanceof Object) || Array.isArray(result)) {
              throw new Error('must be an object');
            }
            return result;
          },
          description: 'gets the number of properties on an object',
        },
      },
      {
        type: 'function',
        function: {
          function: (str: string) => String(str.length),
          parameters: { type: 'string' },
          description: 'gets the length of a string',
        },
      },
      {
        type: 'function',
        // @ts-expect-error function must accept string if parse is omitted
        function: {
          function: (obj: object) => String(Object.keys(obj).length),
          parameters: { type: 'object' },
          description: 'gets the number of properties on an object',
        },
      },
    ],
  });
  openai.chat.completions.runTools({
    messages: [
      { role: 'user', content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}' },
    ],
    model: 'gpt-3.5-turbo',
    tools: [
      new ParsingToolFunction({
        name: 'numProperties',
        // @ts-expect-error parse and function don't match
        parse: (str: string) => str,
        function: (obj: object) => String(Object.keys(obj).length),
        parameters: { type: 'object' },
        description: 'gets the number of properties on an object',
      }),
    ],
  });
  openai.chat.completions.runTools({
    messages: [
      { role: 'user', content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}' },
    ],
    model: 'gpt-3.5-turbo',
    tools: [
      new ParsingToolFunction({
        name: 'numProperties',
        parse: (str: string): object => {
          const result = JSON.parse(str);
          if (!(result instanceof Object) || Array.isArray(result)) {
            throw new Error('must be an object');
          }
          return result;
        },
        function: (obj: object) => String(Object.keys(obj).length),
        parameters: { type: 'object' },
        description: 'gets the number of properties on an object',
      }),
      new ParsingToolFunction({
        name: 'keys',
        parse: (str: string): object => {
          const result = JSON.parse(str);
          if (!(result instanceof Object)) {
            throw new Error('must be an Object');
          }
          return result;
        },
        function: (obj: object) => Object.keys(obj).join(', '),
        parameters: { type: 'object' },
        description: 'gets the number of properties on an object',
      }),
      new ParsingToolFunction({
        name: 'len2',
        // @ts-expect-error parse and function don't match
        parse: (str: string) => str,
        function: (obj: object) => String(Object.keys(obj).length),
        parameters: { type: 'object' },
        description: 'gets the number of properties on an object',
      }),
    ],
  });
  openai.chat.completions.runTools({
    messages: [
      { role: 'user', content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}' },
    ],
    model: 'gpt-3.5-turbo',
    // @ts-ignore error occurs here in TS 4
    tools: [
      {
        type: 'function',
        function: {
          name: 'numProperties',
          parse: (str: string): object => {
            const result = JSON.parse(str);
            if (!(result instanceof Object) || Array.isArray(result)) {
              throw new Error('must be an object');
            }
            return result;
          },
          function: (obj: object) => String(Object.keys(obj).length),
          parameters: { type: 'object' },
          description: 'gets the number of properties on an object',
        },
      },
      {
        type: 'function',
        function: {
          name: 'keys',
          parse: (str: string): object => {
            const result = JSON.parse(str);
            if (!(result instanceof Object)) {
              throw new Error('must be an Object');
            }
            return result;
          },
          function: (obj: object) => Object.keys(obj).join(', '),
          parameters: { type: 'object' },
          description: 'gets the number of properties on an object',
        },
      },
      {
        type: 'function',
        function: {
          name: 'len2',
          parse: (str: string) => str,
          // @ts-ignore error occurs here in TS 5
          // function input doesn't match parse output
          function: (obj: object) => String(Object.keys(obj).length),
          parameters: { type: 'object' },
          description: 'gets the number of properties on an object',
        },
      },
    ] as const,
  });
}

describe('resource completions', () => {
  describe('runTools with stream: false', () => {
    test('successful flow', async () => {
      const { fetch, handleRequest } = mockChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.runTools({
        messages: [{ role: 'user', content: 'tell me what the weather is like' }],
        model: 'gpt-3.5-turbo',
        tools: [
          {
            type: 'function',
            function: {
              function: function getWeather() {
                return `it's raining`;
              },
              parameters: {},
              description: 'gets the weather',
            },
          },
        ],
      });
      const listener = new RunnerListener(runner);

      await handleRequest(async (request) => {
        expect(request.messages).toEqual([{ role: 'user', content: 'tell me what the weather is like' }]);
        return {
          id: '1',
          choices: [
            {
              index: 0,
              finish_reason: 'function_call',
              logprobs: null,
              message: {
                role: 'assistant',
                content: null,
                refusal: null,
                parsed: null,
                tool_calls: [
                  {
                    type: 'function',
                    id: '123',
                    function: {
                      arguments: '',
                      name: 'getWeather',
                    },
                  },
                ],
              },
            },
          ],
          created: Math.floor(Date.now() / 1000),
          model: 'gpt-3.5-turbo',
          object: 'chat.completion',
        };
      });

      await handleRequest(async (request) => {
        expect(request.messages).toEqual([
          {
            role: 'user',
            content: 'tell me what the weather is like',
          },
          {
            role: 'assistant',
            content: null,
            refusal: null,
            parsed: null,
            tool_calls: [
              {
                type: 'function',
                id: '123',
                function: {
                  arguments: '',
                  name: 'getWeather',
                  parsed_arguments: null,
                },
              },
            ],
          },
          {
            role: 'tool',
            content: `it's raining`,
            tool_call_id: '123',
          },
        ]);

        return {
          id: '2',
          choices: [
            {
              index: 0,
              finish_reason: 'stop',
              logprobs: null,
              message: {
                role: 'assistant',
                content: `it's raining`,
                refusal: null,
              },
            },
          ],
          created: Math.floor(Date.now() / 1000),
          model: 'gpt-3.5-turbo',
          object: 'chat.completion',
        };
      });

      await runner.done();

      expect(listener.messages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                arguments: '',
                name: 'getWeather',
                parsed_arguments: null,
              },
            },
          ],
        },
        { role: 'tool', content: `it's raining`, tool_call_id: '123' },
        {
          role: 'assistant',
          content: "it's raining",
          parsed: null,
          refusal: null,
          tool_calls: undefined,
        },
      ]);
      expect(listener.functionCallResults).toEqual([`it's raining`]);
      await listener.sanityCheck();
    });
    test('flow with abort', async () => {
      const { fetch, handleRequest } = mockChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const controller = new AbortController();
      const runner = openai.chat.completions.runTools(
        {
          messages: [{ role: 'user', content: 'tell me what the weather is like' }],
          model: 'gpt-3.5-turbo',
          tools: [
            {
              type: 'function',
              function: {
                function: function getWeather() {
                  return `it's raining`;
                },
                parameters: {},
                description: 'gets the weather',
              },
            },
          ],
        },
        { signal: controller.signal },
      );
      const listener = new RunnerListener(runner);

      await handleRequest(async (request) => {
        expect(request.messages).toEqual([{ role: 'user', content: 'tell me what the weather is like' }]);
        return {
          id: '1',
          choices: [
            {
              index: 0,
              finish_reason: 'function_call',
              logprobs: null,
              message: {
                role: 'assistant',
                content: null,
                parsed: null,
                refusal: null,
                tool_calls: [
                  {
                    type: 'function',
                    id: '123',
                    function: {
                      arguments: '',
                      name: 'getWeather',
                    },
                  },
                ],
              },
            },
          ],
          created: Math.floor(Date.now() / 1000),
          model: 'gpt-3.5-turbo',
          object: 'chat.completion',
        };
      });

      controller.abort();

      await runner.done().catch(() => {});

      expect(listener.messages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                arguments: '',
                name: 'getWeather',
                parsed_arguments: null,
              },
            },
          ],
        },
        { role: 'tool', content: `it's raining`, tool_call_id: '123' },
      ]);
      expect(listener.functionCallResults).toEqual([`it's raining`]);
      await listener.sanityCheck({ error: 'Request was aborted.' });
      expect(runner.aborted).toBe(true);
    });
    test('successful flow with parse', async () => {
      const { fetch, handleRequest } = mockChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.runTools({
        messages: [
          {
            role: 'user',
            content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
          },
        ],
        model: 'gpt-3.5-turbo',
        tools: [
          new ParsingToolFunction({
            name: 'numProperties',
            function: (obj: object) => String(Object.keys(obj).length),
            parameters: { type: 'object' },
            parse: (str: string): object => {
              const result = JSON.parse(str);
              if (!(result instanceof Object) || Array.isArray(result)) {
                throw new Error('must be an object');
              }
              return result;
            },
            description: 'gets the number of properties on an object',
          }),
        ],
      });
      const listener = new RunnerListener(runner);

      await handleRequest(async (request) => {
        expect(request.messages).toEqual([
          {
            role: 'user',
            content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
          },
        ]);
        return {
          id: '1',
          choices: [
            {
              index: 0,
              finish_reason: 'function_call',
              logprobs: null,
              message: {
                role: 'assistant',
                content: null,
                parsed: null,
                refusal: null,
                tool_calls: [
                  {
                    type: 'function',
                    id: '123',
                    function: {
                      arguments: '{"a": 1, "b": 2, "c": 3}',
                      name: 'numProperties',
                    },
                  },
                ],
              },
            },
          ],
          created: Math.floor(Date.now() / 1000),
          model: 'gpt-3.5-turbo',
          object: 'chat.completion',
          usage: {
            completion_tokens: 5,
            prompt_tokens: 20,
            total_tokens: 25,
          },
        };
      });

      await handleRequest(async (request) => {
        expect(request.messages).toEqual([
          {
            role: 'user',
            content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
          },
          {
            role: 'assistant',
            content: null,
            parsed: null,
            refusal: null,
            tool_calls: [
              {
                type: 'function',
                id: '123',
                function: {
                  arguments: '{"a": 1, "b": 2, "c": 3}',
                  name: 'numProperties',
                  parsed_arguments: null,
                },
              },
            ],
          },
          {
            role: 'tool',
            content: '3',
            tool_call_id: '123',
          },
        ]);
        return {
          id: '2',
          choices: [
            {
              index: 0,
              finish_reason: 'stop',
              logprobs: null,
              message: {
                role: 'assistant',
                content: `there are 3 properties in {"a": 1, "b": 2, "c": 3}`,
                refusal: null,
              },
            },
          ],
          created: Math.floor(Date.now() / 1000),
          model: 'gpt-3.5-turbo',
          object: 'chat.completion',
          usage: {
            completion_tokens: 10,
            prompt_tokens: 25,
            total_tokens: 35,
          },
        };
      });

      await runner.done();

      expect(listener.messages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                name: 'numProperties',
                arguments: '{"a": 1, "b": 2, "c": 3}',
                parsed_arguments: null,
              },
            },
          ],
        },
        { role: 'tool', content: '3', tool_call_id: '123' },
        {
          role: 'assistant',
          content: 'there are 3 properties in {"a": 1, "b": 2, "c": 3}',
          parsed: null,
          refusal: null,
          tool_calls: undefined,
        },
      ]);
      expect(listener.functionCallResults).toEqual(['3']);
      await listener.sanityCheck();
    });
    test('flow with parse error', async () => {
      const { fetch, handleRequest } = mockChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.runTools({
        messages: [
          {
            role: 'user',
            content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
          },
        ],
        model: 'gpt-3.5-turbo',
        tools: [
          new ParsingToolFunction({
            name: 'numProperties',
            function: (obj: object) => String(Object.keys(obj).length),
            parameters: { type: 'object' },
            parse: (str: string): object => {
              const result = JSON.parse(str);
              if (!(result instanceof Object) || Array.isArray(result)) {
                throw new Error('must be an object');
              }
              return result;
            },
            description: 'gets the number of properties on an object',
          }),
        ],
      });
      const listener = new RunnerListener(runner);

      await Promise.all([
        handleRequest(async (request) => {
          expect(request.messages).toEqual([
            {
              role: 'user',
              content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
            },
          ]);
          return {
            id: '1',
            choices: [
              {
                index: 0,
                finish_reason: 'function_call',
                logprobs: null,
                message: {
                  role: 'assistant',
                  content: null,
                  parsed: null,
                  refusal: null,
                  tool_calls: [
                    {
                      type: 'function',
                      id: '123',
                      function: {
                        arguments: '[{"a": 1, "b": 2, "c": 3}]',
                        name: 'numProperties',
                      },
                    },
                  ],
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion',
          };
        }),
        handleRequest(async (request) => {
          expect(request.messages).toEqual([
            {
              role: 'user',
              content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
            },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '123',
                  function: {
                    arguments: '[{"a": 1, "b": 2, "c": 3}]',
                    name: 'numProperties',
                    parsed_arguments: null,
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `must be an object`,
              tool_call_id: '123',
            },
          ]);
          return {
            id: '2',
            choices: [
              {
                index: 0,
                finish_reason: 'function_call',
                logprobs: null,
                message: {
                  role: 'assistant',
                  content: null,
                  parsed: null,
                  refusal: null,
                  tool_calls: [
                    {
                      type: 'function',
                      id: '1234',
                      function: {
                        arguments: '{"a": 1, "b": 2, "c": 3}',
                        name: 'numProperties',
                      },
                    },
                  ],
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion',
          };
        }),
        handleRequest(async (request) => {
          expect(request.messages).toEqual([
            {
              role: 'user',
              content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
            },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '123',
                  function: {
                    arguments: '[{"a": 1, "b": 2, "c": 3}]',
                    name: 'numProperties',
                    parsed_arguments: null,
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `must be an object`,
              tool_call_id: '123',
            },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '1234',
                  function: {
                    arguments: '{"a": 1, "b": 2, "c": 3}',
                    name: 'numProperties',
                    parsed_arguments: null,
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: '3',
              tool_call_id: '1234',
            },
          ]);
          return {
            id: '3',
            choices: [
              {
                index: 0,
                finish_reason: 'stop',
                logprobs: null,
                message: {
                  role: 'assistant',
                  content: `there are 3 properties in {"a": 1, "b": 2, "c": 3}`,
                  refusal: null,
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion',
          };
        }),
        runner.done(),
      ]);

      expect(listener.messages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                name: 'numProperties',
                arguments: '[{"a": 1, "b": 2, "c": 3}]',
                parsed_arguments: null,
              },
            },
          ],
        },
        { role: 'tool', content: `must be an object`, tool_call_id: '123' },
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '1234',
              function: {
                name: 'numProperties',
                arguments: '{"a": 1, "b": 2, "c": 3}',
                parsed_arguments: null,
              },
            },
          ],
        },
        { role: 'tool', content: '3', tool_call_id: '1234' },
        {
          role: 'assistant',
          content: 'there are 3 properties in {"a": 1, "b": 2, "c": 3}',
          parsed: null,
          refusal: null,
          tool_calls: undefined,
        },
      ]);
      expect(listener.functionCallResults).toEqual([`must be an object`, '3']);
      await listener.sanityCheck();
    });
    test('single function call', async () => {
      const { fetch, handleRequest } = mockChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.runTools({
        messages: [{ role: 'user', content: 'tell me what the weather is like' }],
        model: 'gpt-3.5-turbo',
        tool_choice: {
          type: 'function',
          function: {
            name: 'getWeather',
          },
        },
        tools: [
          {
            type: 'function',
            function: {
              function: function getWeather() {
                return `it's raining`;
              },
              parameters: {},
              description: 'gets the weather',
            },
          },
        ],
      });
      const listener = new RunnerListener(runner);

      await Promise.all([
        handleRequest(async (request) => {
          expect(request.messages).toEqual([{ role: 'user', content: 'tell me what the weather is like' }]);
          return {
            id: '1',
            choices: [
              {
                index: 0,
                finish_reason: 'function_call',
                logprobs: null,
                message: {
                  role: 'assistant',
                  content: null,
                  parsed: null,
                  refusal: null,
                  tool_calls: [
                    {
                      type: 'function',
                      id: '123',
                      function: {
                        arguments: '',
                        name: 'getWeather',
                      },
                    },
                  ],
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion',
          };
        }),
        runner.done(),
      ]);

      expect(listener.messages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                arguments: '',
                name: 'getWeather',
                parsed_arguments: null,
              },
            },
          ],
        },
        { role: 'tool', content: `it's raining`, tool_call_id: '123' },
      ]);
      expect(listener.functionCallResults).toEqual([`it's raining`]);
      await listener.sanityCheck();
    });
    test('wrong function name', async () => {
      const { fetch, handleRequest } = mockChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.runTools({
        messages: [{ role: 'user', content: 'tell me what the weather is like' }],
        model: 'gpt-3.5-turbo',
        tools: [
          {
            type: 'function',
            function: {
              function: function getWeather() {
                return `it's raining`;
              },
              parameters: {},
              description: 'gets the weather',
            },
          },
        ],
      });
      const listener = new RunnerListener(runner);

      await Promise.all([
        handleRequest(async (request) => {
          expect(request.messages).toEqual([{ role: 'user', content: 'tell me what the weather is like' }]);
          return {
            id: '1',
            choices: [
              {
                index: 0,
                finish_reason: 'function_call',
                logprobs: null,
                message: {
                  role: 'assistant',
                  content: null,
                  parsed: null,
                  refusal: null,
                  tool_calls: [
                    {
                      type: 'function',
                      id: '123',
                      function: {
                        arguments: '',
                        name: 'get_weather',
                      },
                    },
                  ],
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion',
          };
        }),
        handleRequest(async (request) => {
          expect(request.messages).toEqual([
            { role: 'user', content: 'tell me what the weather is like' },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '123',
                  function: {
                    arguments: '',
                    name: 'get_weather',
                    parsed_arguments: null,
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `Invalid tool_call: "get_weather". Available options are: "getWeather". Please try again`,
              tool_call_id: '123',
            },
          ]);
          return {
            id: '2',
            choices: [
              {
                index: 0,
                finish_reason: 'function_call',
                logprobs: null,
                message: {
                  role: 'assistant',
                  content: null,
                  parsed: null,
                  refusal: null,
                  tool_calls: [
                    {
                      type: 'function',
                      id: '1234',
                      function: {
                        arguments: '',
                        name: 'getWeather',
                      },
                    },
                  ],
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion',
          };
        }),
        handleRequest(async (request) => {
          expect(request.messages).toEqual([
            { role: 'user', content: 'tell me what the weather is like' },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '123',
                  function: {
                    arguments: '',
                    name: 'get_weather',
                    parsed_arguments: null,
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `Invalid tool_call: "get_weather". Available options are: "getWeather". Please try again`,
              tool_call_id: '123',
            },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '1234',
                  function: {
                    arguments: '',
                    name: 'getWeather',
                    parsed_arguments: null,
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `it's raining`,
              tool_call_id: '1234',
            },
          ]);
          return {
            id: '3',
            choices: [
              {
                index: 0,
                finish_reason: 'stop',
                logprobs: null,
                message: {
                  role: 'assistant',
                  refusal: null,
                  content: `it's raining`,
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion',
          };
        }),
        runner.done(),
      ]);

      expect(listener.messages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: { name: 'get_weather', arguments: '', parsed_arguments: null },
            },
          ],
        },
        {
          role: 'tool',
          content: `Invalid tool_call: "get_weather". Available options are: "getWeather". Please try again`,
          tool_call_id: '123',
        },
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '1234',
              function: {
                name: 'getWeather',
                arguments: '',
                parsed_arguments: null,
              },
            },
          ],
        },
        { role: 'tool', content: `it's raining`, tool_call_id: '1234' },
        {
          role: 'assistant',
          content: "it's raining",
          parsed: null,
          refusal: null,
          tool_calls: undefined,
        },
      ]);
      expect(listener.functionCallResults).toEqual([
        `Invalid tool_call: "get_weather". Available options are: "getWeather". Please try again`,
        `it's raining`,
      ]);
      await listener.sanityCheck();
    });
  });

  describe('runTools with stream: true', () => {
    test('successful flow', async () => {
      const { fetch, handleRequest } = mockStreamingChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.runTools({
        stream: true,
        messages: [{ role: 'user', content: 'tell me what the weather is like' }],
        model: 'gpt-3.5-turbo',
        tools: [
          {
            type: 'function',
            function: {
              function: function getWeather() {
                return `it's raining`;
              },
              parameters: {},
              description: 'gets the weather',
            },
          },
        ],
      });
      const listener = new StreamingRunnerListener(runner);

      await Promise.all([
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([{ role: 'user', content: 'tell me what the weather is like' }]);
          yield {
            id: '1',
            choices: [
              {
                index: 0,
                finish_reason: 'function_call',
                logprobs: null,
                delta: {
                  role: 'assistant',
                  content: null,
                  tool_calls: [
                    {
                      type: 'function',
                      index: 0,
                      id: '123',
                      function: {
                        arguments: '',
                        name: 'getWeather',
                      },
                    },
                  ],
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion.chunk',
          };
        }),
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([
            { role: 'user', content: 'tell me what the weather is like' },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '123',
                  function: {
                    arguments: '',
                    name: 'getWeather',
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `it's raining`,
              tool_call_id: '123',
            },
          ]);
          for (const choice of contentChoiceDeltas(`it's raining`)) {
            yield {
              id: '2',
              choices: [choice],
              created: Math.floor(Date.now() / 1000),
              model: 'gpt-3.5-turbo',
              object: 'chat.completion.chunk',
            };
          }
        }),
        runner.done(),
      ]);

      expect(listener.eventMessages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                arguments: '',
                name: 'getWeather',
              },
            },
          ],
        },
        { role: 'tool', content: `it's raining`, tool_call_id: '123' },
        {
          role: 'assistant',
          content: "it's raining",
          parsed: null,
          refusal: null,
          tool_calls: undefined,
        },
      ]);
      expect(listener.eventFunctionCallResults).toEqual([`it's raining`]);
      await listener.sanityCheck();
    });
    test('flow with abort', async () => {
      const { fetch, handleRequest } = mockStreamingChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const controller = new AbortController();
      const runner = openai.chat.completions.runTools(
        {
          stream: true,
          messages: [{ role: 'user', content: 'tell me what the weather is like' }],
          model: 'gpt-3.5-turbo',
          tools: [
            {
              type: 'function',
              function: {
                function: function getWeather() {
                  return `it's raining`;
                },
                parameters: {},
                description: 'gets the weather',
              },
            },
          ],
        },
        { signal: controller.signal },
      );
      runner.on('functionToolCallResult', () => controller.abort());
      const listener = new StreamingRunnerListener(runner);

      await handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
        expect(request.messages).toEqual([{ role: 'user', content: 'tell me what the weather is like' }]);
        yield {
          id: '1',
          choices: [
            {
              index: 0,
              finish_reason: 'function_call',
              delta: {
                role: 'assistant',
                content: null,
                tool_calls: [
                  {
                    type: 'function',
                    index: 0,
                    id: '123',
                    function: {
                      arguments: '',
                      name: 'getWeather',
                    },
                  },
                ],
              },
            },
          ],
          created: Math.floor(Date.now() / 1000),
          model: 'gpt-3.5-turbo',
          object: 'chat.completion.chunk',
        };
      });

      await runner.done().catch(() => {});

      expect(listener.eventMessages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                arguments: '',
                name: 'getWeather',
              },
            },
          ],
        },
        { role: 'tool', content: `it's raining`, tool_call_id: '123' },
      ]);
      expect(listener.eventFunctionCallResults).toEqual([`it's raining`]);
      await listener.sanityCheck({ error: 'Request was aborted.' });
      expect(runner.aborted).toBe(true);
    });
    test('successful flow with parse', async () => {
      const { fetch, handleRequest } = mockStreamingChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.runTools({
        stream: true,
        messages: [
          {
            role: 'user',
            content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
          },
        ],
        model: 'gpt-3.5-turbo',
        tools: [
          new ParsingToolFunction({
            name: 'numProperties',
            function: (obj: object) => String(Object.keys(obj).length),
            parameters: { type: 'object' },
            parse: (str: string): object => {
              const result = JSON.parse(str);
              if (!(result instanceof Object) || Array.isArray(result)) {
                throw new Error('must be an object');
              }
              return result;
            },
            description: 'gets the number of properties on an object',
          }),
        ],
      });
      const listener = new StreamingRunnerListener(runner);

      await Promise.all([
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([
            {
              role: 'user',
              content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
            },
          ]);
          yield {
            id: '1',
            choices: [
              {
                index: 0,
                finish_reason: 'function_call',
                delta: {
                  role: 'assistant',
                  content: null,
                  tool_calls: [
                    {
                      type: 'function',
                      id: '123',
                      index: 0,
                      function: {
                        arguments: '{"a": 1, "b": 2, "c": 3}',
                        name: 'numProperties',
                      },
                    },
                  ],
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion.chunk',
          };
        }),
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([
            {
              role: 'user',
              content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
            },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '123',
                  function: {
                    arguments: '{"a": 1, "b": 2, "c": 3}',
                    name: 'numProperties',
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: '3',
              tool_call_id: '123',
            },
          ]);
          for (const choice of contentChoiceDeltas(`there are 3 properties in {"a": 1, "b": 2, "c": 3}`)) {
            yield {
              id: '2',
              choices: [choice],
              created: Math.floor(Date.now() / 1000),
              model: 'gpt-3.5-turbo',
              object: 'chat.completion.chunk',
            };
          }
        }),
        runner.done(),
      ]);

      expect(listener.eventMessages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                name: 'numProperties',
                arguments: '{"a": 1, "b": 2, "c": 3}',
              },
            },
          ],
        },
        { role: 'tool', content: '3', tool_call_id: '123' },
        {
          role: 'assistant',
          content: 'there are 3 properties in {"a": 1, "b": 2, "c": 3}',
          parsed: null,
          refusal: null,
          tool_calls: undefined,
        },
      ]);
      expect(listener.eventFunctionCallResults).toEqual(['3']);
      await listener.sanityCheck();
    });
    test('flow with parse error', async () => {
      const { fetch, handleRequest } = mockStreamingChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.runTools({
        stream: true,
        messages: [
          {
            role: 'user',
            content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
          },
        ],
        model: 'gpt-3.5-turbo',
        tools: [
          new ParsingToolFunction({
            name: 'numProperties',
            function: (obj: object) => String(Object.keys(obj).length),
            parameters: { type: 'object' },
            parse: (str: string): object => {
              const result = JSON.parse(str);
              if (!(result instanceof Object) || Array.isArray(result)) {
                throw new Error('must be an object');
              }
              return result;
            },
            description: 'gets the number of properties on an object',
          }),
        ],
      });
      const listener = new StreamingRunnerListener(runner);

      await Promise.all([
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([
            {
              role: 'user',
              content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
            },
          ]);
          for (const choice of functionCallDeltas('[{"a": 1, "b": 2, "c": 3}]', {
            name: 'numProperties',
            id: '123',
          })) {
            yield {
              id: '1',
              choices: [choice],
              created: Math.floor(Date.now() / 1000),
              model: 'gpt-3.5-turbo',
              object: 'chat.completion.chunk',
            };
          }
        }),
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([
            {
              role: 'user',
              content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
            },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '123',
                  function: {
                    arguments: '[{"a": 1, "b": 2, "c": 3}]',
                    name: 'numProperties',
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `must be an object`,
              tool_call_id: '123',
            },
          ]);
          for (const choice of functionCallDeltas('{"a": 1, "b": 2, "c": 3}', {
            name: 'numProperties',
            id: '1234',
          })) {
            yield {
              id: '2',
              choices: [choice],
              created: Math.floor(Date.now() / 1000),
              model: 'gpt-3.5-turbo',
              object: 'chat.completion.chunk',
            };
          }
        }),
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([
            {
              role: 'user',
              content: 'can you tell me how many properties are in {"a": 1, "b": 2, "c": 3}',
            },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '123',
                  function: {
                    arguments: '[{"a": 1, "b": 2, "c": 3}]',
                    name: 'numProperties',
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `must be an object`,
              tool_call_id: '123',
            },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '1234',
                  function: {
                    arguments: '{"a": 1, "b": 2, "c": 3}',
                    name: 'numProperties',
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: '3',
              tool_call_id: '1234',
            },
          ]);
          for (const choice of contentChoiceDeltas(`there are 3 properties in {"a": 1, "b": 2, "c": 3}`)) {
            yield {
              id: '3',
              choices: [choice],
              created: Math.floor(Date.now() / 1000),
              model: 'gpt-3.5-turbo',
              object: 'chat.completion.chunk',
            };
          }
        }),
        runner.done(),
      ]);

      expect(listener.eventMessages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                name: 'numProperties',
                arguments: '[{"a": 1, "b": 2, "c": 3}]',
              },
            },
          ],
        },
        { role: 'tool', content: `must be an object`, tool_call_id: '123' },
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '1234',
              function: {
                name: 'numProperties',
                arguments: '{"a": 1, "b": 2, "c": 3}',
              },
            },
          ],
        },
        { role: 'tool', content: '3', tool_call_id: '1234' },
        {
          role: 'assistant',
          content: 'there are 3 properties in {"a": 1, "b": 2, "c": 3}',
          parsed: null,
          refusal: null,
          tool_calls: undefined,
        },
      ]);
      expect(listener.eventFunctionCallResults).toEqual([`must be an object`, '3']);
      await listener.sanityCheck();
    });
    test('single function call', async () => {
      const { fetch, handleRequest } = mockStreamingChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.runTools({
        stream: true,
        messages: [{ role: 'user', content: 'tell me what the weather is like' }],
        model: 'gpt-3.5-turbo',
        tool_choice: {
          type: 'function',
          function: {
            name: 'getWeather',
          },
        },
        tools: [
          {
            type: 'function',
            function: {
              function: function getWeather() {
                return `it's raining`;
              },
              parameters: {},
              description: 'gets the weather',
            },
          },
        ],
      });
      const listener = new StreamingRunnerListener(runner);

      await Promise.all([
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([{ role: 'user', content: 'tell me what the weather is like' }]);
          yield {
            id: '1',
            choices: [
              {
                index: 0,
                finish_reason: 'function_call',
                delta: {
                  role: 'assistant',
                  content: null,
                  tool_calls: [
                    {
                      type: 'function',
                      index: 0,
                      id: '123',
                      function: {
                        arguments: '',
                        name: 'getWeather',
                      },
                    },
                  ],
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion.chunk',
          };
        }),
        runner.done(),
      ]);

      expect(listener.eventMessages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                arguments: '',
                name: 'getWeather',
              },
            },
          ],
        },
        { role: 'tool', tool_call_id: '123', content: `it's raining` },
      ]);
      expect(listener.eventFunctionCallResults).toEqual([`it's raining`]);
      await listener.sanityCheck();
    });
    test('wrong function name', async () => {
      const { fetch, handleRequest } = mockStreamingChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.runTools({
        stream: true,
        messages: [{ role: 'user', content: 'tell me what the weather is like' }],
        model: 'gpt-3.5-turbo',
        tools: [
          {
            type: 'function',
            function: {
              function: function getWeather() {
                return `it's raining`;
              },
              parameters: {},
              description: 'gets the weather',
            },
          },
        ],
      });
      const listener = new StreamingRunnerListener(runner);

      await Promise.all([
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([{ role: 'user', content: 'tell me what the weather is like' }]);
          yield {
            id: '1',
            choices: [
              {
                index: 0,
                finish_reason: 'function_call',
                delta: {
                  role: 'assistant',
                  content: null,
                  tool_calls: [
                    {
                      type: 'function',
                      index: 0,
                      id: '123',
                      function: {
                        arguments: '',
                        name: 'get_weather',
                      },
                    },
                  ],
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion.chunk',
          };
        }),
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([
            { role: 'user', content: 'tell me what the weather is like' },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '123',
                  function: {
                    arguments: '',
                    name: 'get_weather',
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `Invalid tool_call: "get_weather". Available options are: "getWeather". Please try again`,
              tool_call_id: '123',
            },
          ]);
          yield {
            id: '2',
            choices: [
              {
                index: 0,
                finish_reason: 'function_call',
                logprobs: null,
                delta: {
                  role: 'assistant',
                  content: null,
                  tool_calls: [
                    {
                      type: 'function',
                      index: 0,
                      id: '1234',
                      function: {
                        arguments: '',
                        name: 'getWeather',
                      },
                    },
                  ],
                },
              },
            ],
            created: Math.floor(Date.now() / 1000),
            model: 'gpt-3.5-turbo',
            object: 'chat.completion.chunk',
          };
        }),
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([
            { role: 'user', content: 'tell me what the weather is like' },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '123',
                  function: {
                    arguments: '',
                    name: 'get_weather',
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `Invalid tool_call: "get_weather". Available options are: "getWeather". Please try again`,
              tool_call_id: '123',
            },
            {
              role: 'assistant',
              content: null,
              parsed: null,
              refusal: null,
              tool_calls: [
                {
                  type: 'function',
                  id: '1234',
                  function: {
                    arguments: '',
                    name: 'getWeather',
                  },
                },
              ],
            },
            {
              role: 'tool',
              content: `it's raining`,
              tool_call_id: '1234',
            },
          ]);
          for (const choice of contentChoiceDeltas(`it's raining`)) {
            yield {
              id: '3',
              choices: [choice],
              created: Math.floor(Date.now() / 1000),
              model: 'gpt-3.5-turbo',
              object: 'chat.completion.chunk',
            };
          }
        }),
        runner.done(),
      ]);

      expect(listener.eventMessages).toEqual([
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '123',
              function: {
                arguments: '',
                name: 'get_weather',
              },
            },
          ],
        },
        {
          role: 'tool',
          content: `Invalid tool_call: "get_weather". Available options are: "getWeather". Please try again`,
          tool_call_id: '123',
        },
        {
          role: 'assistant',
          content: null,
          parsed: null,
          refusal: null,
          tool_calls: [
            {
              type: 'function',
              id: '1234',
              function: {
                arguments: '',
                name: 'getWeather',
              },
            },
          ],
        },
        { role: 'tool', content: `it's raining`, tool_call_id: '1234' },
        {
          role: 'assistant',
          content: "it's raining",
          parsed: null,
          refusal: null,
          tool_calls: undefined,
        },
      ]);
      expect(listener.eventFunctionCallResults).toEqual([
        `Invalid tool_call: "get_weather". Available options are: "getWeather". Please try again`,
        `it's raining`,
      ]);
      await listener.sanityCheck();
    });
  });

  describe('stream', () => {
    test('successful flow', async () => {
      const { fetch, handleRequest } = mockStreamingChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.stream({
        stream: true,
        messages: [{ role: 'user', content: 'tell me what the weather is like' }],
        model: 'gpt-3.5-turbo',
      });

      const listener = new StreamingRunnerListener(runner);

      await Promise.all([
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([{ role: 'user', content: 'tell me what the weather is like' }]);
          for (const choice of contentChoiceDeltas(`The weather is great today!`)) {
            yield {
              id: '1',
              choices: [choice],
              created: Math.floor(Date.now() / 1000),
              model: 'gpt-3.5-turbo',
              object: 'chat.completion.chunk',
            };
          }
        }),
        runner.done(),
      ]);

      expect(listener.finalMessage).toEqual({
        role: 'assistant',
        content: 'The weather is great today!',
        parsed: null,
        refusal: null,
        tool_calls: undefined,
      });
      await listener.sanityCheck();
    });
    test('toReadableStream and fromReadableStream', async () => {
      const { fetch, handleRequest } = mockStreamingChatCompletionFetch();

      const openai = new OpenAI({ apiKey: 'something1234', baseURL: 'http://127.0.0.1:4010', fetch });

      const runner = openai.chat.completions.stream({
        stream: true,
        messages: [{ role: 'user', content: 'tell me what the weather is like' }],
        model: 'gpt-3.5-turbo',
      });

      const proxied = ChatCompletionStreamingRunner.fromReadableStream(runner.toReadableStream());
      const listener = new StreamingRunnerListener(proxied);

      await Promise.all([
        handleRequest(async function* (request): AsyncIterable<OpenAI.Chat.ChatCompletionChunk> {
          expect(request.messages).toEqual([{ role: 'user', content: 'tell me what the weather is like' }]);
          for (const choice of contentChoiceDeltas(`The weather is great today!`)) {
            yield {
              id: '1',
              choices: [choice],
              created: Math.floor(Date.now() / 1000),
              model: 'gpt-3.5-turbo',
              object: 'chat.completion.chunk',
            };
          }
        }),
        proxied.done(),
      ]);

      expect(listener.finalMessage).toEqual({
        role: 'assistant',
        content: 'The weather is great today!',
        parsed: null,
        refusal: null,
        tool_calls: undefined,
      });
      await listener.sanityCheck();
    });
    test('handles network errors', async () => {
      const { fetch, handleRequest } = mockFetch();

      const openai = new OpenAI({ apiKey: '...', fetch });

      const stream = openai.chat.completions.stream(
        {
          max_tokens: 1024,
          model: 'gpt-3.5-turbo',
          messages: [{ role: 'user', content: 'Say hello there!' }],
        },
        { maxRetries: 0 },
      );

      handleRequest(async () => {
        throw new Error('mock request error');
      }).catch(() => {});

      async function runStream() {
        await stream.done();
      }

      await expect(runStream).rejects.toThrow(APIConnectionError);
    });
    test('handles network errors on async iterator', async () => {
      const { fetch, handleRequest } = mockFetch();

      const openai = new OpenAI({ apiKey: '...', fetch });

      const stream = openai.chat.completions.stream(
        {
          max_tokens: 1024,
          model: 'gpt-3.5-turbo',
          messages: [{ role: 'user', content: 'Say hello there!' }],
        },
        { maxRetries: 0 },
      );

      handleRequest(async () => {
        throw new Error('mock request error');
      }).catch(() => {});

      async function runStream() {
        for await (const _event of stream) {
          continue;
        }
      }

      await expect(runStream).rejects.toThrow(APIConnectionError);
    });
  });
});
