import { defineConfig, UserConfig, Plugin } from "vite";
import vue from "@vitejs/plugin-vue";
import dotenv from "dotenv";
import { loadAppConfig } from "./vite.config.utils.mts";
import path from "path";
import { fileURLToPath } from 'url';

// Load environment variables
dotenv.config();

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

export async function createBuildConfig(mode: string): Promise<UserConfig> {
  const appConfig = await loadAppConfig();
  const isCapacitor = mode === "capacitor";
  const isElectron = mode === "electron";
  const isNative = isCapacitor || isElectron;

  // Set platform and disable PWA for native platforms
  process.env.VITE_PLATFORM = mode;
  process.env.VITE_PWA_ENABLED = isNative ? 'false' : 'true';
  process.env.VITE_DISABLE_PWA = isNative ? 'true' : 'false';

  if (isNative) {
    process.env.VITE_PWA_ENABLED = 'false';
  }

  return {
    base: "/",
    plugins: [vue()],
    server: {
      port: parseInt(process.env.VITE_PORT || "8080"),
      fs: { strict: false },
      headers: {
        // Enable SharedArrayBuffer for absurd-sql
        'Cross-Origin-Opener-Policy': 'same-origin',
        'Cross-Origin-Embedder-Policy': 'require-corp'
      },
      proxy: {
        // Proxy API requests to avoid CORS issues with restrictive headers
        '/api': {
          target: 'http://localhost:3000',
          changeOrigin: true,
          secure: false,
          configure: (proxy) => {
            proxy.on('error', (err, req, res) => {
              console.log('[Proxy Error]', err);
            });
            proxy.on('proxyReq', (proxyReq, req, res) => {
              console.log('[Proxy Request]', req.method, req.url, '->', proxyReq.path);
            });
          }
        },
        // Proxy partner API requests (redirect to main API)
        '/partner-api': {
          target: 'http://localhost:3000',
          changeOrigin: true,
          secure: false,
          rewrite: (path) => path.replace(/^\/partner-api/, '/api'),
          configure: (proxy) => {
            proxy.on('error', (err, req, res) => {
              console.log('[Partner API Proxy Error]', err);
            });
            proxy.on('proxyReq', (proxyReq, req, res) => {
              console.log('[Partner API Proxy Request]', req.method, req.url, '->', proxyReq.path);
            });
          }
        },
        // Proxy image API requests
        '/image-api': {
          target: 'https://test-image-api.timesafari.app',
          changeOrigin: true,
          secure: true,
          rewrite: (path) => path.replace(/^\/image-api/, ''),
          configure: (proxy) => {
            proxy.on('error', (err, req, res) => {
              console.log('[Image API Proxy Error]', err);
            });
            proxy.on('proxyReq', (proxyReq, req, res) => {
              console.log('[Image API Proxy Request]', req.method, req.url, '->', proxyReq.path);
            });
          }
        },
        // Proxy direct image requests from image.timesafari.app to avoid CORS issues
        '/image-proxy': {
          target: 'https://image.timesafari.app',
          changeOrigin: true,
          secure: true,
          followRedirects: true,
          rewrite: (path) => path.replace(/^\/image-proxy/, ''),
          configure: (proxy) => {
            proxy.on('error', (err, req, res) => {
              console.log('[Image Proxy Error]', err);
            });
            proxy.on('proxyReq', (proxyReq, req, res) => {
              console.log('[Image Proxy Request]', req.method, req.url, '->', proxyReq.path);
            });
            proxy.on('proxyRes', (proxyRes, req, res) => {
              // Log the response to debug redirects
              console.log('[Image Proxy Response]', req.url, '->', proxyRes.statusCode, proxyRes.headers.location || 'no redirect');
            });
          }
        },
        // Proxy Flickr images to avoid CORS issues
        '/flickr-proxy': {
          target: 'https://live.staticflickr.com',
          changeOrigin: true,
          secure: true,
          followRedirects: true,
          rewrite: (path) => path.replace(/^\/flickr-proxy/, ''),
          configure: (proxy) => {
            proxy.on('error', (err, req, res) => {
              console.log('[Flickr Proxy Error]', err);
            });
            proxy.on('proxyReq', (proxyReq, req, res) => {
              console.log('[Flickr Proxy Request]', req.method, req.url, '->', proxyReq.path);
            });
            proxy.on('proxyRes', (proxyRes, req, res) => {
              // Add CORS headers to the response
              proxyRes.headers['Access-Control-Allow-Origin'] = '*';
              proxyRes.headers['Access-Control-Allow-Methods'] = 'GET, OPTIONS';
              proxyRes.headers['Access-Control-Allow-Headers'] = 'Content-Type';
              console.log('[Flickr Proxy Response]', req.url, '->', proxyRes.statusCode);
            });
          }
        }
      }
    },
    build: {
      outDir: "dist",
      assetsDir: 'assets',
      chunkSizeWarningLimit: 1000,
      rollupOptions: {
        external: isNative 
          ? ['@capacitor/app'] 
          : [],
        output: {
          format: 'esm',
          generatedCode: {
            preset: 'es2015'
          },
          manualChunks: undefined
        }
      }
    },
    worker: {
      format: 'es',
      plugins: () => []
    },
    define: {
      'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV),
      'process.env.VITE_PLATFORM': JSON.stringify(mode),
      'process.env.VITE_PWA_ENABLED': JSON.stringify(!isNative),
      'process.env.VITE_DISABLE_PWA': JSON.stringify(isNative),
      __dirname: JSON.stringify(process.cwd()),
      __IS_MOBILE__: JSON.stringify(isCapacitor),
      __IS_ELECTRON__: JSON.stringify(isElectron),
      __USE_QR_READER__: JSON.stringify(!isCapacitor),
      'process.platform': JSON.stringify('browser'),
      'process.version': JSON.stringify('v16.0.0'),
      'process.env.NODE_DEBUG': JSON.stringify(false),
      'global.process': JSON.stringify({
        platform: 'browser',
        version: 'v16.0.0',
        env: { NODE_DEBUG: false }
      })
    },
    resolve: {
      alias: {
        '@': path.resolve(__dirname, 'src'),
        '@nostr/tools': path.resolve(__dirname, 'node_modules/@nostr/tools'),
        '@nostr/tools/nip06': path.resolve(__dirname, 'node_modules/@nostr/tools/nip06'),
        ...appConfig.aliasConfig,
        'path': path.resolve(__dirname, './src/utils/node-modules/path.js'),
        'fs': path.resolve(__dirname, './src/utils/node-modules/fs.js'),
        'crypto': path.resolve(__dirname, './src/utils/node-modules/crypto.js'),
        'dexie-export-import': path.resolve(__dirname, 'node_modules/dexie-export-import')
      }
    },
    optimizeDeps: {
      include: [
        '@nostr/tools',
        '@nostr/tools/nip06',
      ],
      exclude: isNative ? [
        'register-service-worker',
        'workbox-window',
        'web-push',
        'serviceworker-webpack-plugin',
        'vite-plugin-pwa',
        '@vite-pwa/vue'
      ] : []
    }
  };
}

export default defineConfig(async () => createBuildConfig('web'));