import { Namespace } from "@typespec/compiler";
import { $ } from "@typespec/compiler/experimental/typekit";
import { BasicTestRunner } from "@typespec/compiler/testing";
import { beforeEach, describe, expect, it } from "vitest";
import "../../src/typekit/index.js";
import { createTypespecHttpClientLibraryTestRunner } from "../test-host.js";

let runner: BasicTestRunner;

beforeEach(async () => {
  runner = await createTypespecHttpClientLibraryTestRunner();
});

describe("listNamespaces", () => {
  it("basic", async () => {
    await runner.compile(`
      @service({
        title: "Widget Service",
      })
        namespace DemoService;
      `);
    expect($.clientLibrary.listNamespaces()).toHaveLength(1);
    expect($.clientLibrary.listNamespaces()[0].name).toEqual("DemoService");
  });

  it("nested", async () => {
    // we only want to return the top level namespaces
    await runner.compile(`
      @service({
        title: "Widget Service",
      })
      namespace DemoService {
        namespace NestedService {
          namespace NestedNestedService {
          } 
        }
      }
    `);
    expect($.clientLibrary.listNamespaces()).toHaveLength(1);
    expect($.clientLibrary.listNamespaces()[0].name).toEqual("DemoService");

    const subNamespaces = $.clientLibrary.listNamespaces($.clientLibrary.listNamespaces()[0]);
    expect(subNamespaces).toHaveLength(1);
    expect(subNamespaces[0].name).toEqual("NestedService");

    const subSubNamespaces = $.clientLibrary.listNamespaces(subNamespaces[0]);
    expect(subSubNamespaces).toHaveLength(1);
    expect(subSubNamespaces[0].name).toEqual("NestedNestedService");
  });
});

describe("listClients", () => {
  it("should only get clients for defined namespaces in the spec", async () => {
    await runner.compile(`
           op foo(): void;
          `);

    const namespace = $.program.getGlobalNamespaceType();
    const client = $.client.getClient(namespace);

    const clients = $.clientLibrary.listClients(client);

    expect(clients).toHaveLength(0);
  });

  it("should get the client", async () => {
    const { DemoService } = (await runner.compile(`
      @service({
        title: "Widget Service",
      })
      @test namespace DemoService;
      `)) as { DemoService: Namespace };

    const responses = $.clientLibrary.listClients(DemoService);
    expect(responses).toHaveLength(1);
    expect(responses[0].name).toEqual("DemoServiceClient");
  });
  it("get subclients", async () => {
    const { DemoService } = (await runner.compile(`
      @service({
        title: "Widget Service",
      })
      @test namespace DemoService {
        namespace NestedService {};
      }
      `)) as { DemoService: Namespace };

    const responses = $.clientLibrary.listClients(DemoService);
    expect(responses).toHaveLength(1);
    expect(responses[0].name).toEqual("DemoServiceClient");

    const subClients = $.clientLibrary.listClients(responses[0]);
    expect(subClients).toHaveLength(1);
    expect(subClients[0].name).toEqual("NestedServiceClient");
  });
});
