/**
 * Smoke Tests — Desktop 聊天流断裂探测
 *
 * 6 个冒烟测试验证 Desktop 聊天功能的完整连通性。
 * 覆盖 3 种聊天模式 + 流取消 + 离线恢复 + 错误处理。
 *
 * 前提条件:
 * - Desktop App 运行在 http://localhost:1420 (pnpm tauri dev)
 * - 后端服务可用 (SaaS 或 Kernel)
 *
 * 运行: cd desktop && npx playwright test smoke_chat
 */

import { test, expect, type Page } from '@playwright/test';

test.setTimeout(120000);

// Helper: 等待应用就绪
async function waitForAppReady(page: Page) {
  await page.goto('/');
  // 等待 React 挂载 — 检查 #root 有内容
  await page.waitForSelector('#root > *', { timeout: 15000 });
  await page.waitForTimeout(1000); // 给 React 额外渲染时间
}

// Helper: 查找聊天输入框
async function findChatInput(page: Page) {
  // 多种选择器尝试，兼容不同 UI 状态
  const selectors = [
    'textarea[placeholder*="消息"]',
    'textarea[placeholder*="输入"]',
    'textarea[placeholder*="chat"]',
    'textarea',
    'input[type="text"]',
    '.chat-input textarea',
    '[data-testid="chat-input"]',
  ];
  for (const sel of selectors) {
    const el = page.locator(sel).first();
    if (await el.isVisible().catch(() => false)) {
      return el;
    }
  }
  // 截图帮助调试
  await page.screenshot({ path: 'test-results/smoke_chat_input_not_found.png' });
  throw new Error('Chat input not found — screenshot saved');
}

// Helper: 发送消息
async function sendMessage(page: Page, message: string) {
  const input = await findChatInput(page);
  await input.fill(message);
  // 按回车发送或点击发送按钮
  await input.press('Enter').catch(async () => {
    const sendBtn = page.locator('button[aria-label*="发送"], button[aria-label*="send"], button:has-text("发送")').first();
    if (await sendBtn.isVisible().catch(() => false)) {
      await sendBtn.click();
    }
  });
}

// ── D1: Gateway 模式聊天 ──────────────────────────────────────────

test('D1: Gateway 模式 — 发送消息→接收响应', async ({ page }) => {
  await waitForAppReady(page);

  // 检查连接状态
  const connectionStatus = page.locator('[data-testid="connection-status"], .connection-status, [aria-label*="连接"]');
  const isConnected = await connectionStatus.isVisible().catch(() => false);

  if (!isConnected) {
    // 尝试通过 Store 检查连接状态
    const state = await page.evaluate(() => {
      const stores = (window as any).__ZCLAW_STORES__;
      return stores ? { hasStores: true } : { hasStores: false };
    });
    console.log('Store state:', JSON.stringify(state));
  }

  // 发送测试消息
  await sendMessage(page, '你好，这是一个冒烟测试');

  // 等待响应 (流式消息或错误)
  // 检查是否有新的消息气泡出现
  const messageBubble = page.locator('.message-bubble, [class*="message"], [data-role="assistant"]').last();
  const gotResponse = await messageBubble.waitFor({ state: 'visible', timeout: 30000 }).catch(() => false);

  if (!gotResponse) {
    await page.screenshot({ path: 'test-results/smoke_d1_no_response.png' });
  }

  // 记录结果但不硬性失败 — Smoke 的目的是探测
  console.log(`D1 result: ${gotResponse ? 'PASS — response received' : 'BROKEN — no response'}`);
  expect(gotResponse).toBeTruthy();
});

// ── D2: Kernel 模式 (Tauri IPC) ───────────────────────────────────

test('D2: Kernel 模式 — Tauri invoke 检查', async ({ page }) => {
  await waitForAppReady(page);

  // 检查 Tauri 是否可用
  const tauriAvailable = await page.evaluate(() => {
    return !!(window as any).__TAURI__;
  });

  if (!tauriAvailable) {
    console.log('D2 SKIP: Not running in Tauri context (browser mode)');
    test.skip();
    return;
  }

  // 检查 connectionStore 模式
  const connectionMode = await page.evaluate(() => {
    const stores = (window as any).__ZCLAW_STORES__;
    if (stores?.connection) {
      const state = stores.connection.getState?.();
      return state?.connectionMode || state?.mode || 'unknown';
    }
    return 'no_store';
  });

  console.log(`Connection mode: ${connectionMode}`);

  // 尝试通过 Kernel 发送消息 (需要 Kernel 模式)
  if (connectionMode === 'tauri' || connectionMode === 'unknown') {
    await sendMessage(page, 'Kernel 模式冒烟测试');

    // 等待流式响应
    const gotChunk = await page.evaluate(() => {
      return new Promise<boolean>((resolve) => {
        const stores = (window as any).__ZCLAW_STORES__;
        if (!stores?.stream) {
          resolve(false);
          return;
        }
        const unsub = stores.stream.subscribe((state: any) => {
          if (state.chunks?.length > 0) {
            unsub();
            resolve(true);
          }
        });
        // 超时 15s
        setTimeout(() => { unsub(); resolve(false); }, 15000);
      });
    });

    console.log(`D2 result: ${gotChunk ? 'PASS' : 'BROKEN'}`);
  }
});

// ── D3: SaaS Relay 模式 ───────────────────────────────────────────

test('D3: SaaS Relay — SSE 流式检查', async ({ page }) => {
  await waitForAppReady(page);

  // 检查 SaaS 登录状态
  const saasState = await page.evaluate(() => {
    const stores = (window as any).__ZCLAW_STORES__;
    if (!stores) return { hasStores: false };
    const saas = stores.saas?.getState?.();
    return {
      hasStores: true,
      isAuthenticated: saas?.isAuthenticated || false,
      connectionMode: stores.connection?.getState?.()?.connectionMode || 'unknown',
    };
  });

  if (saasState.connectionMode !== 'saas' && saasState.connectionMode !== 'browser') {
    console.log(`D3 SKIP: Not in SaaS mode (current: ${saasState.connectionMode})`);
    test.skip();
    return;
  }

  // 发送消息
  await sendMessage(page, 'SaaS Relay 冒烟测试');

  // 检查是否有 relay 请求发出
  const relayEvents = await page.evaluate(() => {
    return new Promise<boolean>((resolve) => {
      const stores = (window as any).__ZCLAW_STORES__;
      if (!stores?.stream) { resolve(false); return; }
      const unsub = stores.stream.subscribe((state: any) => {
        if (state.isStreaming || state.chunks?.length > 0) {
          unsub();
          resolve(true);
        }
      });
      setTimeout(() => { unsub(); resolve(false); }, 20000);
    });
  });

  if (!relayEvents) {
    await page.screenshot({ path: 'test-results/smoke_d3_no_relay.png' });
  }

  console.log(`D3 result: ${relayEvents ? 'PASS' : 'BROKEN'}`);
  expect(relayEvents).toBeTruthy();
});

// ── D4: 流取消 ────────────────────────────────────────────────────

test('D4: 流取消 — 发送→取消→停止', async ({ page }) => {
  await waitForAppReady(page);

  // 发送一条长回复请求
  await sendMessage(page, '请详细解释量子计算的基本原理，包括量子比特、叠加态和纠缠');

  // 等待流式开始
  await page.waitForTimeout(1000);

  // 查找取消按钮
  const cancelBtn = page.locator(
    'button[aria-label*="取消"], button[aria-label*="停止"], button:has-text("停止"), [data-testid="cancel-stream"]'
  ).first();

  if (await cancelBtn.isVisible().catch(() => false)) {
    await cancelBtn.click();

    // 验证流状态变为 cancelled/stopped
    const streamState = await page.evaluate(() => {
      const stores = (window as any).__ZCLAW_STORES__;
      return stores?.stream?.getState?.()?.isStreaming ?? 'no_store';
    });

    console.log(`D4 result: stream cancelled, isStreaming=${streamState}`);
    expect(streamState).toBe(false);
  } else {
    // 如果没有取消按钮，尝试通过 Store 取消
    const cancelled = await page.evaluate(() => {
      const stores = (window as any).__ZCLAW_STORES__;
      if (stores?.stream?.getState?.()?.cancelStream) {
        stores.stream.getState().cancelStream();
        return true;
      }
      return false;
    });

    console.log(`D4 result: ${cancelled ? 'cancelled via Store' : 'no cancel mechanism found'}`);
  }
});

// ── D5: 离线→在线 ─────────────────────────────────────────────────

test('D5: 离线队列 — 断网→发消息→恢复→重放', async ({ page, context }) => {
  await waitForAppReady(page);

  // 模拟离线
  await context.setOffline(true);

  // 发送消息 (应该被排队)
  await sendMessage(page, '离线测试消息');

  // 检查 offlineStore 是否有队列
  const offlineState = await page.evaluate(() => {
    const stores = (window as any).__ZCLAW_STORES__;
    // 没有 offlineStore 暴露在 window 上，通过 connection 状态检查
    return {
      hasOfflineStore: !!stores?.offline,
      isOnline: stores?.connection?.getState?.()?.isOnline ?? 'unknown',
    };
  });

  console.log('Offline state:', JSON.stringify(offlineState));

  // 恢复网络
  await context.setOffline(false);

  // 等待重连
  await page.waitForTimeout(3000);

  // 检查消息是否被重放 (或至少没有被丢失)
  const afterReconnect = await page.evaluate(() => {
    const stores = (window as any).__ZCLAW_STORES__;
    return {
      isOnline: stores?.connection?.getState?.()?.isOnline ?? 'unknown',
    };
  });

  console.log('After reconnect:', JSON.stringify(afterReconnect));
});

// ── D6: 错误恢复 ──────────────────────────────────────────────────

test('D6: 错误恢复 — 无效模型→错误提示→恢复', async ({ page }) => {
  await waitForAppReady(page);

  // 尝试通过 Store 设置无效模型
  const errorTriggered = await page.evaluate(() => {
    const stores = (window as any).__ZCLAW_STORES__;
    if (!stores?.chat) return false;

    // 有些 Store 允许直接设置 model
    const state = stores.chat.getState?.();
    if (state?.setSelectedModel) {
      state.setSelectedModel('nonexistent-model-xyz');
      return true;
    }
    return false;
  });

  if (errorTriggered) {
    // 尝试发送消息，期望看到错误
    await sendMessage(page, '测试错误恢复');

    // 等待错误 UI 或错误消息
    await page.waitForTimeout(5000);

    // 检查是否有错误提示
    const errorVisible = await page.locator(
      '.error-message, [class*="error"], [role="alert"], .ant-message-error'
    ).first().isVisible().catch(() => false);

    // 恢复有效模型
    await page.evaluate(() => {
      const stores = (window as any).__ZCLAW_STORES__;
      const state = stores?.chat?.getState?.();
      if (state?.setSelectedModel && state?.availableModels?.length > 0) {
        state.setSelectedModel(state.availableModels[0]);
      }
    });

    console.log(`D6 result: error=${errorVisible}, recovery attempted`);
  } else {
    console.log('D6 SKIP: Cannot trigger model error via Store');
  }
});