import { expectDiagnostics } from "@typespec/compiler/testing";
import { deepStrictEqual, ok, strictEqual } from "assert";
import { describe, expect, it } from "vitest";
import { OpenAPI3PathParameter, OpenAPI3QueryParameter } from "../src/types.js";
import { supportedVersions, worksFor } from "./works-for.js";

worksFor(supportedVersions, ({ diagnoseOpenApiFor, openApiFor, version }) => {
  describe("query parameters", () => {
    async function getQueryParam(code: string): Promise<OpenAPI3QueryParameter> {
      const res = await openApiFor(code);
      const param = res.paths[`/`].get.parameters[0];
      strictEqual(param.in, "query");
      return param;
    }

    it("create a query param", async () => {
      const param = await getQueryParam(
        `op test(@query myParam: string): void;
      `,
      );
      strictEqual(param.name, "myParam");
      deepStrictEqual(param.schema, { type: "string" });
    });

    it("create a query param with a different name", async () => {
      const param = await getQueryParam(
        `
      op test(@query("$select") select: string): void;
      `,
      );
      strictEqual(param.in, "query");
      strictEqual(param.name, "$select");
    });

    it.each([
      { encoding: "ArrayEncoding.pipeDelimited", style: "pipeDelimited" },
      { encoding: "ArrayEncoding.spaceDelimited", style: "spaceDelimited" },
      { encoding: "ArrayEncoding.commaDelimited", style: "commaDelimited" },
      { encoding: "ArrayEncoding.newlineDelimited", style: "newlineDelimited" },
    ])("can set style to $style with @encode($encoding)", async ({ encoding, style }) => {
      const param = await getQueryParam(
        `op test(@query @encode(${encoding}) myParam: string[]): void;`,
      );
      expect(param).toMatchObject({
        explode: false,
        style: style,
      });
      expect(param.schema).toStrictEqual({
        type: "array",
        items: { type: "string" },
      });
    });

    it("propagates @JsonSchema.uniqueItems to a query parameter schema", async () => {
      const param = await getQueryParam(
        `op test(@query @JsonSchema.uniqueItems myParam: string[]): void;`,
      );
      expect(param.schema).toStrictEqual({
        type: "array",
        uniqueItems: true,
        items: { type: "string" },
      });
    });

    describe("doesn't set explode if explode: true (Openapi3.0 inverse default)", () => {
      it("with option", async () => {
        const param = await getQueryParam(
          `op test(@query(#{explode: true}) myParam: string): void;`,
        );
        expect(param).not.toHaveProperty("explode");
      });

      it("with uri template", async () => {
        const param = await getQueryParam(`@route("{?myParam*}") op test(myParam: string): void;`);
        expect(param).not.toHaveProperty("explode");
      });
    });

    describe("set explode: false if explode is not set", () => {
      it("with option", async () => {
        const param = await getQueryParam(
          `op test(@query(#{explode: false}) myParam: string): void;`,
        );
        expect(param).toMatchObject({
          explode: false,
        });
      });

      it("with uri template", async () => {
        const param = await getQueryParam(`@route("{?myParam}") op test(myParam: string): void;`);
        expect(param).toMatchObject({
          explode: false,
        });
      });
    });

    it("create a query param that is a model property", async () => {
      const res = await openApiFor(
        `
      op test(@query id: UserContext.id): void;
      
      model UserContext {
        id: string;
      }
      `,
      );
      deepStrictEqual(res.paths["/"].get.parameters[0], {
        in: "query",
        name: "id",
        explode: false,
        required: true,
        schema: {
          type: "string",
        },
      });
    });

    it("create an header param", async () => {
      const res = await openApiFor(
        `
      op test(@header arg1: string): void;
      `,
      );
      strictEqual(res.paths["/"].get.parameters[0].in, "header");
      strictEqual(res.paths["/"].get.parameters[0].name, "arg1");
      deepStrictEqual(res.paths["/"].get.parameters[0].schema, { type: "string" });
    });

    it("create an header param with a different name", async () => {
      const res = await openApiFor(
        `
      op test(@header("foo-bar") foo: string): void;
      `,
      );
      strictEqual(res.paths["/"].get.parameters[0].in, "header");
      strictEqual(res.paths["/"].get.parameters[0].name, "foo-bar");
    });

    it("create a header param respecting the explode option", async () => {
      const res = await openApiFor(
        `
      op test(
        @header(#{name: "$explodeTrue", explode: true}) expTrue: { foo: string },
        @header(#{name: "$explodeFalse", explode: false}) expFalse: { foo: string },
        @header(#{name: "$explodeDefault"}) expDefault: { foo: string },
      ): void;
      `,
      );
      const params = res.paths["/"].get.parameters;
      deepStrictEqual(params[0], {
        in: "header",
        name: "$explodeTrue",
        explode: true,
        schema: {
          type: "object",
          required: ["foo"],
          properties: {
            foo: { type: "string" },
          },
        },
        required: true,
      });
      deepStrictEqual(params[1], {
        in: "header",
        name: "$explodeFalse",
        required: true,
        schema: {
          type: "object",
          required: ["foo"],
          properties: {
            foo: { type: "string" },
          },
        },
      });
      deepStrictEqual(params[2], {
        in: "header",
        name: "$explodeDefault",
        schema: {
          type: "object",
          required: ["foo"],
          properties: {
            foo: { type: "string" },
          },
        },
        required: true,
      });
    });

    it("create a cookie param", async () => {
      const res = await openApiFor(
        `
      op test(@cookie arg1: string): void;
      `,
      );
      strictEqual(res.paths["/"].get.parameters[0].in, "cookie");
      strictEqual(res.paths["/"].get.parameters[0].name, "arg1");
      deepStrictEqual(res.paths["/"].get.parameters[0].schema, { type: "string" });
    });

    it("create a cookie param with a different name", async () => {
      const res = await openApiFor(
        `
      op test(@cookie("foo_bar") foo: string): void;
      `,
      );
      strictEqual(res.paths["/"].get.parameters[0].in, "cookie");
      strictEqual(res.paths["/"].get.parameters[0].name, "foo_bar");
    });

    // Regression test for https://github.com/microsoft/typespec/issues/414
    it("@doc set the description on the parameter not its schema", async () => {
      const res = await openApiFor(
        `
      op test(@query @doc("my-doc") arg1: string): void;
      `,
      );
      strictEqual(res.paths["/"].get.parameters[0].description, "my-doc");
      strictEqual(res.paths["/"].get.parameters[0].schema.description, undefined);
    });

    it("errors on duplicate parameter keys", async () => {
      const diagnostics = await diagnoseOpenApiFor(
        `
      model P {
        @query id: string;
      }

      @friendlyName("P")
      model Q {
        @header id: string;
      }

      @route("/test1")
      op test1(...P): void;

      @route("/test2")
      op test2(...Q): void;
      `,
        { "omit-unreachable-types": true },
      );

      expectDiagnostics(diagnostics, [
        {
          code: "@typespec/openapi/duplicate-type-name",
          message: /parameter/,
        },
      ]);
    });

    it("errors on invalid parameter keys", async () => {
      const diagnostics = await diagnoseOpenApiFor(
        `
      model Pet {
        @query()
        $take?: int32;
        
        @query()
        $top?: int32;
      }
      @service
      namespace Endpoints {
        op list(...Pet): void;
      }
      `,
        { "omit-unreachable-types": true },
      );

      expectDiagnostics(diagnostics, [
        {
          code: "@typespec/openapi3/invalid-component-fixed-field-key",
        },
        {
          code: "@typespec/openapi3/invalid-component-fixed-field-key",
        },
      ]);
    });

    it("inline spread of parameters from anonymous model", async () => {
      const oapi = await openApiFor(
        `
      op template<TParameters, TReturn>(...TParameters): TReturn;
      op instantiation is template<{@path id: string}, void>;
      `,
      );

      ok(oapi.paths["/{id}"].get);

      deepStrictEqual(oapi.paths["/{id}"].get.parameters, [
        {
          name: "id",
          in: "path",
          required: true,
          schema: {
            type: "string",
          },
        },
      ]);
    });

    it("omit parameters with type never", async () => {
      const res = await openApiFor(
        `
      op test(@query select: never, @query top: int32): void;
      `,
      );
      strictEqual(res.paths["/"].get.parameters.length, 1);
      strictEqual(res.paths["/"].get.parameters[0].in, "query");
      strictEqual(res.paths["/"].get.parameters[0].name, "top");
    });

    it("omit request body if type is void", async () => {
      const res = await openApiFor(`op test(@body foo: void ): void;`);
      strictEqual(res.paths["/"].post.requestBody, undefined);
    });

    it("using @body ignore any metadata property underneath", async () => {
      const res = await openApiFor(`@get op read(
      @body body: {
        #suppress "@typespec/http/metadata-ignored"
        @header header: string,
        #suppress "@typespec/http/metadata-ignored"
        @cookie cookie: string,
        #suppress "@typespec/http/metadata-ignored"
        @query query: string,
        #suppress "@typespec/http/metadata-ignored"
        @statusCode code: 201,
      }
    ): void;`);
      expect(res.paths["/"].get.requestBody.content["application/json"].schema).toEqual({
        type: "object",
        properties: {
          header: { type: "string" },
          cookie: { type: "string" },
          query: { type: "string" },
          code: { type: "number", enum: [201] },
        },
        required: ["header", "cookie", "query", "code"],
      });
    });

    // Test for https://github.com/microsoft/typespec/issues/6224
    it("implicit body with metadata keeps decorator info on body properties", async () => {
      const res = await openApiFor(`
        @test op test(
          @doc("Doc for param")
          param: string;

          @query
          queryParam?: string,
        ): void;
        `);
      expect(res.paths["/"].post.requestBody.content["application/json"].schema).toEqual({
        type: "object",
        properties: {
          param: {
            type: "string",
            description: "Doc for param",
          },
        },
        required: ["param"],
      });
    });

    describe("request parameters resolving to no property in the body produce no body", () => {
      it.each(["()", "(@header prop: string)", `(@invisible(Lifecycle) prop: string)`])(
        "%s",
        async (params) => {
          const res = await openApiFor(`op test${params}: void;`);
          strictEqual(res.paths["/"].get.requestBody, undefined);
        },
      );
    });

    it("property in body with only metadata properties should still be included", async () => {
      const res = await openApiFor(`op read(
        headers: {
          @header header1: string;
          @header header2: string;
        };
        cookies: {
          @cookie cookie1: string;
          @cookie cookie2: string;
        };
        name: string;
      ): void;`);
      expect(res.paths["/"].post.requestBody.content["application/json"].schema).toEqual({
        type: "object",
        properties: {
          headers: { type: "object" },
          cookies: { type: "object" },
          name: { type: "string" },
        },
        required: ["headers", "cookies", "name"],
      });
    });

    it("property in body with only metadata properties and @bodyIgnore should not be included", async () => {
      const res = await openApiFor(`op read(
        @bodyIgnore headers: {
          @header header1: string;
          @header header2: string;
        };
        @bodyIgnore cookies: {
          @cookie cookie1: string;
          @cookie cookie2: string;
        };
        name: string;
    ): void;`);
      expect(res.paths["/"].post.requestBody.content["application/json"].schema).toEqual({
        type: "object",
        properties: {
          name: { type: "string" },
        },
        required: ["name"],
      });
    });

    describe("content type parameter", () => {
      it("header named with 'Content-Type' gets resolved as content type for operation.", async () => {
        const res = await openApiFor(
          `
        op test(
          @header("Content-Type") explicitContentType: "application/octet-stream",
          @body foo: string
        ): void;
        `,
        );
        ok(res.paths["/"].post.requestBody.content["application/octet-stream"]);
        deepStrictEqual(
          res.paths["/"].post.requestBody.content["application/octet-stream"].schema,
          {
            type: "string",
          },
        );
      });

      it("header named contentType gets resolved as content type for operation.", async () => {
        const res = await openApiFor(
          `
        op test(
          @header contentType: "application/octet-stream",
          @body foo: string
        ): void;
        `,
        );
        ok(res.paths["/"].post.requestBody.content["application/octet-stream"]);
        deepStrictEqual(
          res.paths["/"].post.requestBody.content["application/octet-stream"].schema,
          {
            type: "string",
          },
        );
        strictEqual(res.paths["/"].post.parameters.length, 0);
      });

      it("query named contentType doesn't get resolved as the content type parameter.", async () => {
        const res = await openApiFor(
          `
        op test(
          @query contentType: "application/octet-stream",
          @body foo: string
        ): void;
        `,
        );
        strictEqual(res.paths["/"].post.requestBody.content["application/octet-stream"], undefined);
        ok(res.paths["/"].post.requestBody.content["text/plain"]);
      });
    });
  });

  describe("path parameters", () => {
    async function getPathParam(code: string, name = "myParam"): Promise<OpenAPI3PathParameter> {
      const res = await openApiFor(code);
      return res.paths[`/{${name}}`].get.parameters[0];
    }

    it("figure out the route parameter from the name of the param", async () => {
      const res = await openApiFor(`op test(@path myParam: string): void;`);
      expect(res.paths).toHaveProperty("/{myParam}");
    });

    it("uses explicit name provided from @path", async () => {
      const res = await openApiFor(`op test(@path("my-custom-path") myParam: string): void;`);
      expect(res.paths).toHaveProperty("/{my-custom-path}");
    });

    it("inline adds an arbitrary extension to a parameter", async () => {
      const oapi = await openApiFor(
        `
      op get(
        @path
        @extension("x-parameter-extension", "foobaz")
        petId: string;
      ): void;
      `,
      );
      strictEqual(oapi.paths["/{petId}"].get.parameters[0]["x-parameter-extension"], "foobaz");
    });

    describe("set explode: true", () => {
      it("with option", async () => {
        const param = await getPathParam(
          `op test(@path(#{explode: true}) myParam: string[]): void;`,
        );
        expect(param).toMatchObject({
          explode: true,
          schema: {
            type: "array",
            items: { type: "string" },
          },
        });
      });
      it("with uri template", async () => {
        const param = await getPathParam(`@route("{myParam*}") op test(myParam: string[]): void;`);
        expect(param).toMatchObject({
          explode: true,
          schema: {
            type: "array",
            items: { type: "string" },
          },
        });
      });
    });

    describe("set style: simple", () => {
      it("with option", async () => {
        const param = await getPathParam(
          `op test(@path(#{style: "simple"}) myParam: string): void;`,
        );
        expect(param).not.toHaveProperty("style");
      });

      it("with uri template", async () => {
        const param = await getPathParam(`@route("{myParam}") op test(myParam: string): void;`);
        expect(param).not.toHaveProperty("style");
      });
    });

    describe("set style: label", () => {
      it("with option", async () => {
        const param = await getPathParam(
          `op test(@path(#{style: "label"}) myParam: string): void;`,
        );
        expect(param).toMatchObject({
          style: "label",
        });
      });

      it("with uri template", async () => {
        const param = await getPathParam(`@route("{.myParam}") op test(myParam: string): void;`);
        expect(param).toMatchObject({
          style: "label",
        });
      });
    });

    describe("set style: matrix", () => {
      it("with option", async () => {
        const param = await getPathParam(
          `op test(@path(#{style: "matrix"}) myParam: string): void;`,
        );
        expect(param).toMatchObject({
          style: "matrix",
        });
      });

      it("with uri template", async () => {
        const param = await getPathParam(`@route("{;myParam}") op test(myParam: string): void;`);
        expect(param).toMatchObject({
          style: "matrix",
        });
      });
    });

    describe("emit diagnostic when using style: path", () => {
      it("with option", async () => {
        const diagnostics = await diagnoseOpenApiFor(
          `op test(@path(#{style: "path"}) myParam: string): void;`,
        );
        expectDiagnostics(diagnostics, { code: "@typespec/openapi3/invalid-style" });
      });

      it("with uri template", async () => {
        const diagnostics = await diagnoseOpenApiFor(
          `@route("{/myParam}") op test(myParam: string): void;`,
        );
        expectDiagnostics(diagnostics, { code: "@typespec/openapi3/invalid-style" });
      });

      it("with optional parameter", async () => {
        const diagnostics = await diagnoseOpenApiFor(
          `@route("test") op test(@path myParam?: string): void;`,
        );
        expectDiagnostics(diagnostics, { code: "@typespec/openapi3/invalid-style" });
      });
    });

    describe("emit diagnostic when using style: fragment", () => {
      it("with option", async () => {
        const diagnostics = await diagnoseOpenApiFor(
          `op test(@path(#{style: "fragment"}) myParam: string): void;`,
        );
        expectDiagnostics(diagnostics, { code: "@typespec/openapi3/invalid-style" });
      });

      it("with uri template", async () => {
        const diagnostics = await diagnoseOpenApiFor(
          `@route("{#myParam}") op test(myParam: string): void;`,
        );
        expectDiagnostics(diagnostics, { code: "@typespec/openapi3/invalid-style" });
      });
    });

    describe("emit diagnostic when using reserved expansion", () => {
      it("with option", async () => {
        const diagnostics = await diagnoseOpenApiFor(
          `op test(@path(#{allowReserved: true}) myParam: string): void;`,
        );
        expectDiagnostics(diagnostics, { code: "@typespec/openapi3/path-reserved-expansion" });
      });

      it("with uri template", async () => {
        const diagnostics = await diagnoseOpenApiFor(
          `@route("{+myParam}") op test(myParam: string): void;`,
        );
        expectDiagnostics(diagnostics, { code: "@typespec/openapi3/path-reserved-expansion" });
      });
    });
  });

  it("parmeter with default value and $ref wraps $ref in allOf in OpenAPI 3.0 only", async () => {
    const res = await openApiFor(
      `
      enum Example { a, b}
      op test(@query example?: Example = Example.b): void;
      `,
    );

    const schema = res.paths["/"].get.parameters[0].schema;
    if (version === "3.0.0") {
      // In OpenAPI 3.0, $ref cannot have sibling properties, so we wrap in allOf
      expect(schema.allOf).toEqual([{ $ref: "#/components/schemas/Example" }]);
      expect(schema.default).toBe("b");
    } else {
      // In OpenAPI 3.1+, $ref can have sibling properties
      expect(schema.$ref).toBe("#/components/schemas/Example");
      expect(schema.default).toBe("b");
    }
  });
});