/**
 * Diagnostic test file to debug mock tracking failures on Forgejo CI.
 * Tests pass locally (macOS + Docker grunt-runner) but image-downloader
 * tests fail on the actual Forgejo runner. This file isolates mock/spy
 * tracking behavior to find the exact failure point.
 *
 * DELETE THIS FILE once the root cause is found and fixed.
 */
import {
  describe,
  test,
  expect,
  spyOn,
  mock,
  beforeEach,
  afterEach,
} from "bun:test";

describe("DEBUG: mock tracking diagnostics", () => {
  test("basic mock() tracks calls", () => {
    const fn = mock(() => 42);
    fn("hello");
    console.log("[DIAG] mock.calls:", JSON.stringify(fn.mock.calls));
    expect(fn).toHaveBeenCalledWith("hello");
    expect(fn).toHaveBeenCalledTimes(1);
  });

  test("mock() tracks calls through object property", () => {
    const obj = { method: mock(() => "ok") };
    obj.method("arg1", "arg2");
    console.log(
      "[DIAG] obj.method.mock.calls:",
      JSON.stringify(obj.method.mock.calls),
    );
    expect(obj.method).toHaveBeenCalledWith("arg1", "arg2");
  });

  test("mock() tracks calls after destructuring", () => {
    const fn = mock(() => Promise.resolve("done"));
    const obj = { fn };
    const { fn: extracted } = obj;
    extracted("test");
    console.log(
      "[DIAG] destructured mock.calls:",
      JSON.stringify(fn.mock.calls),
    );
    expect(fn).toHaveBeenCalledWith("test");
  });

  test("mock() tracks calls when passed as parameter", async () => {
    const mockFn = mock(() => Promise.resolve(undefined));
    const deps = { action: mockFn as (...args: unknown[]) => Promise<void> };

    async function doWork(d: {
      action: (...args: unknown[]) => Promise<void>;
    }) {
      const { action } = d;
      await action("path", { recursive: true });
    }

    await doWork(deps);
    console.log(
      "[DIAG] param-passed mock.calls:",
      JSON.stringify(mockFn.mock.calls),
    );
    expect(mockFn).toHaveBeenCalledWith("path", { recursive: true });
  });

  test("spyOn(console) tracks calls", () => {
    const spy = spyOn(console, "warn").mockImplementation(() => {});
    console.warn("test warning");
    // Check raw calls before expect
    console.log(
      "[DIAG] console.warn spy.mock.calls:",
      JSON.stringify(spy.mock.calls),
    );
    expect(spy).toHaveBeenCalledWith("test warning");
    spy.mockRestore();
  });

  test("spyOn(global, 'fetch') tracks calls", async () => {
    const fetchSpy = spyOn(global, "fetch").mockResolvedValue({
      ok: true,
      arrayBuffer: async () => new ArrayBuffer(0),
    } as Response);
    await fetch("https://example.com");
    console.log(
      "[DIAG] fetch spy.mock.calls:",
      JSON.stringify(fetchSpy.mock.calls),
    );
    expect(fetchSpy).toHaveBeenCalledWith("https://example.com");
    fetchSpy.mockRestore();
  });

  test("mock() with mockClear preserves tracking", () => {
    const fn = mock(() => "first");
    fn("before-clear");
    fn.mockClear();
    fn("after-clear");
    console.log(
      "[DIAG] after mockClear, calls:",
      JSON.stringify(fn.mock.calls),
    );
    expect(fn).toHaveBeenCalledTimes(1);
    expect(fn).toHaveBeenCalledWith("after-clear");
  });

  describe("mock created at describe scope", () => {
    const describeMock = mock(() => Promise.resolve(undefined as any));

    beforeEach(() => {
      describeMock.mockClear();
    });

    test("tracks calls from describe-scoped mock", async () => {
      await describeMock("test-arg");
      console.log(
        "[DIAG] describe-scope mock.calls:",
        JSON.stringify(describeMock.mock.calls),
      );
      expect(describeMock).toHaveBeenCalledWith("test-arg");
    });

    test("tracks calls via DI pattern (like image-downloader)", async () => {
      const deps = {
        mkdir: describeMock as any,
      };

      // Simulate the exact pattern from image-downloader.ts
      const { mkdir } = deps;
      await mkdir("/tmp/github-images", { recursive: true });

      console.log(
        "[DIAG] DI-pattern mock.calls:",
        JSON.stringify(describeMock.mock.calls),
      );
      expect(describeMock).toHaveBeenCalledWith("/tmp/github-images", {
        recursive: true,
      });
    });
  });

  describe("env var diagnostics", () => {
    test("GITHUB_SERVER_URL value", () => {
      console.log("[DIAG] GITHUB_SERVER_URL:", process.env.GITHUB_SERVER_URL);
      console.log("[DIAG] FORGEJO:", process.env.FORGEJO);
      console.log("[DIAG] RUNNER_OS:", process.env.RUNNER_OS);
      console.log("[DIAG] Bun.version:", Bun.version);
      console.log("[DIAG] process.arch:", process.arch);
      console.log("[DIAG] process.platform:", process.platform);
      expect(true).toBe(true);
    });
  });
});