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

import { useDirectThreadChatSubscription } from '../src/view/project-development/chat/controller/useDirectThreadChatSubscription';
import { createTauriEventFake, type TauriEventFake } from './tauriEventFake';
import { resetTauriRuntime } from './tauriRuntimeFake';

const BOOTSTRAP = {
  subscriptionId: 'direct-subscription-1',
  lastCompletedItemId: null,
  events: [],
};

let eventFake: TauriEventFake | null = null;

afterEach(() => {
  cleanup();
  eventFake?.restore();
  eventFake = null;
  resetTauriRuntime();
  delete (window as Window & { __TAURI_INTERNALS__?: unknown })
    .__TAURI_INTERNALS__;
});

function installEventFake(
  invoke: (command: string, args?: Record<string, unknown>) => Promise<unknown>,
) {
  eventFake = createTauriEventFake({ invoke });
  eventFake.install();
  return eventFake;
}

describe('useDirectThreadChatSubscription', () => {
  it('卸载时幂等注销 native subscriber', async () => {
    const unsubscribeCalls: Record<string, unknown>[] = [];
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'subscribe_direct_project_thread') return BOOTSTRAP;
        if (command === 'consume_direct_project_thread') return { events: [] };
        if (command === 'unsubscribe_direct_project_thread') {
          unsubscribeCalls.push(args ?? {});
        }
        return null;
      },
    );
    installEventFake(invoke);

    const { unmount } = renderHook(() =>
      useDirectThreadChatSubscription({
        enabled: true,
        projectPath: 'C:/projects/demo',
      }),
    );
    await waitFor(() =>
      expect(invoke).toHaveBeenCalledWith('subscribe_direct_project_thread', {
        projectPath: 'C:/projects/demo',
      }),
    );

    unmount();
    await act(async () => {
      await Promise.resolve();
    });

    expect(unsubscribeCalls).toEqual([
      { subscriptionId: BOOTSTRAP.subscriptionId },
    ]);
  });

  it('bootstrap 迟到于卸载时仍注销已登记的 native subscriber', async () => {
    let resolveBootstrap!: (value: typeof BOOTSTRAP) => void;
    const unsubscribeCalls: Record<string, unknown>[] = [];
    const invoke = vi.fn(
      async (command: string, args?: Record<string, unknown>) => {
        if (command === 'subscribe_direct_project_thread') {
          return new Promise<typeof BOOTSTRAP>((resolve) => {
            resolveBootstrap = resolve;
          });
        }
        if (command === 'unsubscribe_direct_project_thread') {
          unsubscribeCalls.push(args ?? {});
        }
        return { events: [] };
      },
    );
    installEventFake(invoke);

    const { unmount } = renderHook(() =>
      useDirectThreadChatSubscription({
        enabled: true,
        projectPath: 'C:/projects/demo',
      }),
    );
    await waitFor(() =>
      expect(invoke).toHaveBeenCalledWith('subscribe_direct_project_thread', {
        projectPath: 'C:/projects/demo',
      }),
    );

    unmount();
    await act(async () => {
      resolveBootstrap(BOOTSTRAP);
      await Promise.resolve();
    });

    expect(unsubscribeCalls).toEqual([
      { subscriptionId: BOOTSTRAP.subscriptionId },
    ]);
  });
});