// @vitest-environment jsdom
import {
  act,
  cleanup,
  fireEvent,
  render,
  renderHook,
  screen,
  waitFor,
} from '@testing-library/react';
import { afterEach, describe, expect, it, vi } from 'vitest';

import type { GameCreatorDirectActiveTurn } from '../src/app/types';
import {
  DIRECT_ACTIVE_TURNS_CHANGED_EVENT,
  useDirectActiveTurns,
} from '../src/features/agent-runtime/directActiveTurns';
import { ActiveProjectRunsPanel } from '../src/features/app-shell/ActiveProjectRunsPanel';
import { createTauriEventFake, type TauriEventFake } from './tauriEventFake';

let eventFake: TauriEventFake | null = null;

afterEach(() => {
  cleanup();
  eventFake?.restore();
  eventFake = null;
});

const ACTIVE_TURN = {
  projectPath: 'C:/projects/demo',
  agentId: 'planning-agent-v2',
  runId: 'run-1',
} as unknown as GameCreatorDirectActiveTurn;

describe('useDirectActiveTurns', () => {
  it('keeps the snapshot identity when an event-triggered read returns the same content', async () => {
    // 回归点：事件重复或内容未变时不能换掉数组身份，避免窗口标题栏重新发布。
    const invoke = vi.fn(async () => [ACTIVE_TURN]) as never;
    const { result } = renderHook(() =>
      useDirectActiveTurns({
        invoke,
        enabled: true,
      }),
    );

    await waitFor(() => {
      expect(result.current.activeTurns).toHaveLength(1);
    });
    const firstSnapshot = result.current.activeTurns;

    await act(async () => {
      await result.current.refreshActiveTurns();
      await result.current.refreshActiveTurns();
    });
    expect(result.current.activeTurns).toBe(firstSnapshot);
  });

  it('subscribes before the first snapshot and does not read while quiet', async () => {
    const invoke = vi.fn(async () => [ACTIVE_TURN]);
    eventFake = createTauriEventFake({ invoke });
    eventFake.install();
    const setIntervalSpy = vi.spyOn(window, 'setInterval');
    const { result } = renderHook(() =>
      useDirectActiveTurns({ invoke: invoke as never, enabled: true }),
    );

    await waitFor(() =>
      expect(
        eventFake?.listenInvokeCounts.get(DIRECT_ACTIVE_TURNS_CHANGED_EVENT),
      ).toBe(1),
    );
    const listReads = () =>
      invoke.mock.calls.filter(
        ([command]) => command === 'list_game_creator_direct_active_turns',
      ).length;
    await waitFor(() => expect(result.current.activeTurns).toHaveLength(1));
    expect(listReads()).toBe(1);
    // The native event registration is already in place before the first list read;
    // the fake keeps the callback eval pending until we explicitly flush it.
    expect(eventFake.pendingRegistrationEvals()).toBe(1);
    eventFake.flushRegistrationEvals();
    expect(setIntervalSpy.mock.calls.some(([, delay]) => delay === 5_000)).toBe(
      false,
    );
    await new Promise((resolve) => setTimeout(resolve, 0));
    expect(listReads()).toBe(1);
    setIntervalSpy.mockRestore();
  });

  it('coalesces repeated in-flight notifications into one follow-up read', async () => {
    let resolveFirst!: (turns: GameCreatorDirectActiveTurn[]) => void;
    const first = new Promise<GameCreatorDirectActiveTurn[]>((resolve) => {
      resolveFirst = resolve;
    });
    const invoke = vi
      .fn()
      .mockReturnValueOnce(first)
      .mockResolvedValue([ACTIVE_TURN]);
    eventFake = createTauriEventFake({ invoke });
    eventFake.install();
    renderHook(() =>
      useDirectActiveTurns({ invoke: invoke as never, enabled: true }),
    );
    await waitFor(() =>
      expect(
        eventFake?.listenInvokeCounts.get(DIRECT_ACTIVE_TURNS_CHANGED_EVENT),
      ).toBe(1),
    );
    eventFake.flushRegistrationEvals();
    await waitFor(() => expect(invoke).toHaveBeenCalledTimes(1));

    eventFake.emit(DIRECT_ACTIVE_TURNS_CHANGED_EVENT, { revision: 1 });
    eventFake.emit(DIRECT_ACTIVE_TURNS_CHANGED_EVENT, { revision: 2 });
    resolveFirst([ACTIVE_TURN]);
    await waitFor(() => expect(invoke).toHaveBeenCalledTimes(2));
    await new Promise((resolve) => setTimeout(resolve, 0));
    expect(invoke).toHaveBeenCalledTimes(2);
  });

  it('keeps the last snapshot and reports observability failure when an event read fails', async () => {
    let fail = false;
    const invoke = vi.fn(async () => {
      if (fail) {
        throw new Error('snapshot unavailable');
      }
      return [ACTIVE_TURN];
    });
    eventFake = createTauriEventFake({ invoke });
    eventFake.install();
    const { result } = renderHook(() =>
      useDirectActiveTurns({ invoke: invoke as never, enabled: true }),
    );
    eventFake.flushRegistrationEvals();
    await waitFor(() => expect(result.current.activeTurns).toHaveLength(1));
    const firstSnapshot = result.current.activeTurns;

    vi.useFakeTimers();
    try {
      fail = true;
      act(() => {
        eventFake?.emit(DIRECT_ACTIVE_TURNS_CHANGED_EVENT, { revision: 1 });
      });
      await act(async () => {
        await vi.runAllTimersAsync();
      });
      expect(result.current.activeTurns).toBe(firstSnapshot);
      expect(result.current.snapshotReadFailed).toBe(true);
    } finally {
      vi.useRealTimers();
    }
  });

  it('clears to a stable empty snapshot when the hook is disabled', async () => {
    let resolveSnapshot!: (turns: GameCreatorDirectActiveTurn[]) => void;
    const snapshot = new Promise<GameCreatorDirectActiveTurn[]>((resolve) => {
      resolveSnapshot = resolve;
    });
    const invoke = vi.fn(() => snapshot) as never;
    const { result, rerender } = renderHook(
      ({ enabled }: { enabled: boolean }) =>
        useDirectActiveTurns({ invoke, enabled }),
      { initialProps: { enabled: true } },
    );

    const emptySnapshot = result.current.activeTurns;
    await act(async () => {
      resolveSnapshot([]);
      await snapshot;
    });
    expect(result.current.activeTurns).toBe(emptySnapshot);
    rerender({ enabled: false });
    expect(result.current.activeTurns).toBe(emptySnapshot);
  });

  it('读取失败后的重试定时器会在卸载后清理', async () => {
    vi.useFakeTimers();
    const invoke = vi.fn(async () => {
      throw new Error('temporarily unavailable');
    });
    const clearTimeoutSpy = vi.spyOn(window, 'clearTimeout');

    try {
      const { unmount } = renderHook(() =>
        useDirectActiveTurns({ invoke, enabled: true }),
      );
      await act(async () => {
        await vi.advanceTimersByTimeAsync(0);
      });
      expect(invoke).toHaveBeenCalledTimes(1);

      unmount();
      expect(clearTimeoutSpy).toHaveBeenCalled();

      await act(async () => {
        await vi.advanceTimersByTimeAsync(1_000);
      });
      expect(invoke).toHaveBeenCalledTimes(1);
    } finally {
      vi.useRealTimers();
      clearTimeoutSpy.mockRestore();
    }
  });

  it('停用后晚到的非空快照不能恢复活动回合，手动刷新也不发请求', async () => {
    let complete!: (turns: GameCreatorDirectActiveTurn[]) => void;
    const invoke = vi.fn(
      () =>
        new Promise<GameCreatorDirectActiveTurn[]>((resolve) => {
          complete = resolve;
        }),
    );
    const { result, rerender } = renderHook(
      ({ enabled }) =>
        useDirectActiveTurns({ invoke: invoke as never, enabled }),
      { initialProps: { enabled: true } },
    );
    rerender({ enabled: false });
    const empty = result.current.activeTurns;
    await act(async () => {
      complete([ACTIVE_TURN]);
      await result.current.refreshActiveTurns();
    });
    expect(result.current.activeTurns).toBe(empty);
    expect(result.current.snapshotReadFailed).toBe(false);
    expect(invoke).toHaveBeenCalledTimes(1);
  });

  it('重新启用后读取新快照，旧请求晚到不能覆盖新快照', async () => {
    let completeOld!: (turns: GameCreatorDirectActiveTurn[]) => void;
    const invoke = vi
      .fn()
      .mockImplementationOnce(
        () =>
          new Promise<GameCreatorDirectActiveTurn[]>((resolve) => {
            completeOld = resolve;
          }),
      )
      .mockResolvedValue([{ ...ACTIVE_TURN, runId: 'new-run' }]);
    const { result, rerender } = renderHook(
      ({ enabled }) =>
        useDirectActiveTurns({ invoke: invoke as never, enabled }),
      { initialProps: { enabled: true } },
    );
    rerender({ enabled: false });
    rerender({ enabled: true });
    await waitFor(() =>
      expect(result.current.activeTurns[0]?.runId).toBe('new-run'),
    );
    const current = result.current.activeTurns;
    await act(async () => {
      completeOld([ACTIVE_TURN]);
    });
    expect(result.current.activeTurns).toBe(current);
    expect(invoke).toHaveBeenCalledTimes(2);
  });
});

describe('ActiveProjectRunsPanel', () => {
  it('按开始时间展示正在运行的项目并支持进入项目', () => {
    const onOpenProject = vi.fn();
    render(
      <ActiveProjectRunsPanel
        activeTurns={[
          {
            projectPath: 'C:/projects/later',
            projectName: '后开始',
            turnId: 'turn-later',
            startedAt: 200,
            status: 'streaming',
            updatedAt: 220,
            sequence: 2,
          },
          {
            projectPath: 'C:/projects/first',
            projectName: '先开始',
            turnId: 'turn-first',
            startedAt: 100,
            status: 'running',
            updatedAt: 120,
            sequence: 1,
          },
        ]}
        onOpenProject={onOpenProject}
      />,
    );

    const items = screen.getAllByRole('button');
    expect(items.map((item) => item.textContent?.includes('先开始'))).toEqual([
      true,
      false,
    ]);
    fireEvent.click(items[0]);
    expect(onOpenProject).toHaveBeenCalledWith('C:/projects/first');
  });

  it('读取失败时保留明确的读取提示，不伪装成没有运行项目', () => {
    render(<ActiveProjectRunsPanel activeTurns={[]} readFailed />);

    expect(screen.getByRole('status').textContent).toBe(
      '未能读取正在运行的项目',
    );
  });

  it('标题栏入口只显示最后开始的项目，展开后列出全部项目', () => {
    const onOpenProject = vi.fn();
    render(
      <ActiveProjectRunsPanel
        placement="titlebar"
        activeTurns={[
          {
            projectPath: 'C:/projects/first',
            projectName: '先开始',
            turnId: 'turn-first',
            startedAt: 100,
            status: 'running',
            updatedAt: 120,
            sequence: 1,
          },
          {
            projectPath: 'C:/projects/later',
            projectName: '后开始',
            turnId: 'turn-later',
            startedAt: 200,
            status: 'streaming',
            updatedAt: 220,
            sequence: 2,
          },
        ]}
        onOpenProject={onOpenProject}
      />,
    );

    expect(screen.getByRole('button', { name: /后开始/ })).toBeTruthy();
    expect(screen.queryByRole('menu')).toBeNull();
    fireEvent.click(screen.getByRole('button', { name: /后开始/ }));
    expect(screen.getByRole('menu')).toBeTruthy();
    expect(screen.getAllByRole('menuitem')).toHaveLength(2);
    fireEvent.click(screen.getByRole('menuitem', { name: /先开始/ }));
    expect(onOpenProject).toHaveBeenCalledWith('C:/projects/first');
  });
});