import { describe, expect, it } from "vitest";

import { ApiProtocolError, ApiRequestError, parseApiResponse } from "@/lib/api";

describe("unified API response parser", () => {
  it("returns data from a valid success envelope", () => {
    expect(
      parseApiResponse<{ items: string[] }>(
        { code: 200, msg: "success", data: { items: ["one"] } },
        200,
      ),
    ).toEqual({ items: ["one"] });
  });

  it("exposes structured fields from an API error envelope", () => {
    try {
      parseApiResponse(
        {
          code: 404,
          msg: "详情不存在",
          data: null,
          errorCode: "DETAIL_NOT_FOUND",
          details: { key: "missing" },
        },
        404,
      );
      throw new Error("expected API error");
    } catch (error) {
      expect(error).toBeInstanceOf(ApiRequestError);
      expect((error as ApiRequestError).message).toBe("详情不存在");
      expect((error as ApiRequestError).errorCode).toBe("DETAIL_NOT_FOUND");
      expect((error as ApiRequestError).details).toEqual({ key: "missing" });
    }
  });

  it("rejects a malformed or mismatched envelope", () => {
    expect(() => parseApiResponse({ code: 200, msg: "success" }, 200)).toThrow(ApiProtocolError);
    expect(() => parseApiResponse({ code: 201, msg: "success", data: {} }, 200)).toThrow(ApiProtocolError);
    expect(() => parseApiResponse({ code: 200, msg: "ok", data: {} }, 200)).toThrow(ApiProtocolError);
  });
});