import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import { VitePWA } from 'vite-plugin-pwa';
import path from 'path';

export default defineConfig({
  plugins: [
    react(),
    VitePWA({
      registerType: 'autoUpdate',
      includeAssets: ['icon.svg'],
      manifest: {
        name: 'AI Terminal Assistant',
        short_name: 'AI Assistant',
        description: 'Your intelligent coding companion',
        theme_color: '#111827',
        background_color: '#111827',
        display: 'standalone',
        orientation: 'portrait-primary',
        scope: '/',
        start_url: '/',
        icons: [
          {
            src: '/icon.svg',
            sizes: 'any',
            type: 'image/svg+xml',
            purpose: 'any maskable',
          },
        ],
      },
      workbox: {
        globPatterns: ['**/*.{js,css,html,ico,png,svg,woff2}'],
        runtimeCaching: [
          {
            urlPattern: /\/api\//i,
            handler: 'NetworkFirst',
            options: {
              cacheName: 'api-cache',
              expiration: {
                maxEntries: 50,
                maxAgeSeconds: 60 * 60, // 1 hour
              },
            },
          },
        ],
      },
      devOptions: {
        enabled: false, // 开发模式下禁用 PWA
      },
    }),
  ],
  resolve: {
    alias: {
      '@': path.resolve(__dirname, './src'),
    },
  },
  server: {
    port: 5173,
    proxy: {
      '/api': {
        target: 'http://localhost:3000',
        changeOrigin: true,
        ws: true,
        // 忽略 WebSocket 代理错误（切换 session 时正常发生）
        configure: (proxy) => {
          // 静默忽略所有代理错误
          proxy.on('error', (err, _req, res) => {
            const msg = err.message || '';
            // EPIPE/ECONNRESET 是正常的连接关闭错误
            if (msg.includes('EPIPE') || msg.includes('ECONNRESET') || msg.includes('ECONNREFUSED')) {
              if (res && 'writeHead' in res && !res.headersSent) {
                res.writeHead(502);
                res.end();
              }
              return;
            }
            console.error('[proxy error]', msg);
          });
          // WebSocket 请求阶段错误
          proxy.on('proxyReqWs', (_proxyReq, _req, socket) => {
            socket.on('error', () => {});
          });
          // WebSocket 响应阶段错误
          proxy.on('open', (proxySocket) => {
            proxySocket.on('error', () => {});
          });
          // WebSocket 关闭
          proxy.on('close', (_res, socket) => {
            if (socket && !socket.destroyed) {
              socket.destroy();
            }
          });
        },
      },
      '/health': {
        target: 'http://localhost:3000',
        changeOrigin: true,
      },
    },
  },
});
