import { defineConfig } from 'vitest/config'
import react from '@vitejs/plugin-react'
import path from 'path'
import fs from 'fs'

// Generate a build timestamp for version checking
const buildTimestamp = new Date().toISOString();

// https://vite.dev/config/
export default defineConfig({
  logLevel: 'info',
  plugins: [
    react(),
    // Plugin to generate version.json on build
    {
      name: 'generate-version-file',
      closeBundle() {
        const distPath = path.resolve(__dirname, 'dist');
        // Ensure dist directory exists before writing
        if (!fs.existsSync(distPath)) {
          fs.mkdirSync(distPath, { recursive: true });
        }
        const versionInfo = {
          buildTimestamp,
          generatedAt: new Date().toISOString(),
        };
        fs.writeFileSync(
          path.resolve(distPath, 'version.json'),
          JSON.stringify(versionInfo, null, 2)
        );
        console.log('[generate-version-file] Created dist/version.json with timestamp:', buildTimestamp);
      },
    },
  ],
  // Inject build timestamp into the app
  define: {
    'import.meta.env.VITE_BUILD_TIMESTAMP': JSON.stringify(buildTimestamp),
  },
  resolve: {
    alias: {
      '@': path.resolve(__dirname, './src'),
    },
  },
  build: {
    // Increase chunk size warning limit (mermaid is large)
    chunkSizeWarningLimit: 2000,
    rollupOptions: {
      output: {
        // Manual chunks to separate large dependencies
        manualChunks: {
          maplibre: ['maplibre-gl'],
        },
      },
    },
  },
  optimizeDeps: {
    include: ['maplibre-gl'],
    // Exclude mermaid from pre-bundling - it's dynamically imported
    exclude: ['mermaid'],
  },
  server: {
    port: 5173,
    proxy: {
      // =======================================================================
      // REMOTE BACKEND: Proxy to bronhouder.nl (Hetzner server)
      // To switch back to local, change 'https://bronhouder.nl' to 'http://localhost:PORT'
      // =======================================================================
      
      // PostgreSQL API proxy
      '/api/postgres': {
        target: 'https://bronhouder.nl',
        changeOrigin: true,
        secure: true,
      },
      // Geo API proxy (PostGIS backend)
      '/api/geo': {
        target: 'https://bronhouder.nl',
        changeOrigin: true,
        secure: true,
      },
      // TypeDB API proxy
      '/api/typedb': {
        target: 'https://bronhouder.nl',
        changeOrigin: true,
        secure: true,
      },
      // DuckLake API proxy
      '/ducklake': {
        target: 'https://bronhouder.nl',
        changeOrigin: true,
        secure: true,
      },
      // Qdrant vector database proxy
      '/qdrant': {
        target: 'https://bronhouder.nl',
        changeOrigin: true,
        secure: true,
      },
      // RAG API proxy
      '/api/rag': {
        target: 'https://bronhouder.nl',
        changeOrigin: true,
        secure: true,
      },
      // Generic API fallback
      '/api': {
        target: 'https://bronhouder.nl',
        changeOrigin: true,
        secure: true,
      },
      // Profile entity API proxy
      '/api/profile-entity': {
        target: 'https://bronhouder.nl',
        changeOrigin: true,
        secure: true,
      },
      // Oxigraph SPARQL endpoint proxy
      '/sparql': {
        target: 'https://bronhouder.nl',
        changeOrigin: true,
        secure: true,
      },
    },
  },
  test: {
    globals: true,
    environment: 'jsdom',
    setupFiles: './tests/setup.ts',
    coverage: {
      provider: 'v8',
      reporter: ['text', 'json', 'html'],
      exclude: [
        'node_modules/',
        'tests/',
        '**/*.test.{ts,tsx}',
        '**/*.spec.{ts,tsx}',
      ],
    },
  },
});