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

// https://vite.dev/config/
export default defineConfig({
  build: {
    rollupOptions: {
      output: {
        manualChunks: {
          // Core React dependencies
          'vendor-react': ['react', 'react-dom', 'react-router-dom'],
          // UI/utility libraries (if any large ones are added)
          // Split pages into separate chunks for lazy loading
        }
      }
    },
    // Target modern browsers for smaller bundle
    target: 'es2020',
    // Increase chunk size warning limit
    chunkSizeWarningLimit: 600
  },
  plugins: [
    react(),
    VitePWA({
      registerType: 'autoUpdate',
      // Force service worker to update immediately
      devOptions: {
        enabled: false
      },
      includeAssets: ['favicon.ico', 'robots.txt'],
      manifest: {
        name: 'GamerComp',
        short_name: 'GamerComp',
        description: 'Where kids become Game Composers! Learn AI communication by creating your own games.',
        theme_color: '#6366f1',
        background_color: '#1e1b4b',
        display: 'standalone',
        orientation: 'any',
        scope: '/',
        start_url: '/',
        icons: [
          {
            src: '/icon.svg',
            sizes: 'any',
            type: 'image/svg+xml',
            purpose: 'any'
          },
          {
            src: '/icon.svg',
            sizes: '512x512',
            type: 'image/svg+xml',
            purpose: 'maskable'
          }
        ],
        categories: ['games', 'entertainment', 'education'],
        screenshots: [
          {
            src: '/screenshot-wide.png',
            sizes: '1280x720',
            type: 'image/png',
            form_factor: 'wide'
          },
          {
            src: '/screenshot-narrow.png',
            sizes: '640x1136',
            type: 'image/png',
            form_factor: 'narrow'
          }
        ]
      },
      workbox: {
        // Force update without waiting
        skipWaiting: true,
        clientsClaim: true,
        // Import push notification handler
        importScripts: ['/push-handler.js'],
        // Use network-first for navigation to always get fresh HTML
        navigateFallback: 'index.html',
        navigateFallbackDenylist: [/^\/api/],
        // Cache strategies
        runtimeCaching: [
          {
            // Cache API responses (except play/start which needs to be fresh)
            urlPattern: /^https:\/\/gamercomp\.com\/api\/(?!play\/start|auth).*/i,
            handler: 'NetworkFirst',
            options: {
              cacheName: 'api-cache',
              expiration: {
                maxEntries: 100,
                maxAgeSeconds: 60 * 60 // 1 hour
              },
              cacheableResponse: {
                statuses: [0, 200]
              }
            }
          },
          {
            // Cache game code for offline play
            urlPattern: /^https:\/\/gamercomp\.com\/api\/arcade\/games\/\d+$/i,
            handler: 'CacheFirst',
            options: {
              cacheName: 'game-cache',
              expiration: {
                maxEntries: 50,
                maxAgeSeconds: 60 * 60 * 24 * 7 // 1 week
              },
              cacheableResponse: {
                statuses: [0, 200]
              }
            }
          },
          {
            // Cache fonts
            urlPattern: /^https:\/\/fonts\.googleapis\.com\/.*/i,
            handler: 'CacheFirst',
            options: {
              cacheName: 'google-fonts-cache',
              expiration: {
                maxEntries: 10,
                maxAgeSeconds: 60 * 60 * 24 * 365 // 1 year
              },
              cacheableResponse: {
                statuses: [0, 200]
              }
            }
          },
          {
            // Cache images
            urlPattern: /\.(?:png|jpg|jpeg|svg|gif|webp)$/i,
            handler: 'CacheFirst',
            options: {
              cacheName: 'image-cache',
              expiration: {
                maxEntries: 50,
                maxAgeSeconds: 60 * 60 * 24 * 30 // 30 days
              }
            }
          }
        ],
        // Pre-cache essential files
        globPatterns: ['**/*.{js,css,html,ico,png,svg,woff2}']
      }
    })
  ],
})