import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import path from 'path';
import { fileURLToPath } from 'url';
import { dirname, join } from 'path';
import { versionPlugin } from '../../../@packages/@utils/vite-version-plugin/src';
import { initServiceRegistry, getServicePort, getServiceUrl } from '@lilith/service-registry';

// =============================================================================
// Service Configuration - loaded from services.yaml and ports.yaml
// =============================================================================

// Initialize service registry
const __dirname = dirname(fileURLToPath(import.meta.url));
const projectRoot = join(__dirname, '../../../..');

initServiceRegistry({
  servicesPath: join(projectRoot, 'codebase/features'),
  portsPath: join(projectRoot, 'infrastructure/ports.yaml'),
  strict: false,
});

// Port for this frontend
const devPort = process.env.VITE_PORT
  ? parseInt(process.env.VITE_PORT, 10)
  : getServicePort('platform-dev', 'frontend-dev');

// API URLs from service registry - reuses platform-admin API backend
const platformAdminApiUrl = getServiceUrl('platform-admin', 'api');
const seoUrl = getServiceUrl('seo', 'api');
const imageGeneratorUrl = getServiceUrl('image-generator', 'api');
const semanticUrl = getServiceUrl('truth-validation', 'api');
const conversationAssistantUrl = process.env.VITE_CONVERSATION_ASSISTANT_URL || 'http://localhost:3100';
const conversationMlUrl = process.env.VITE_CONVERSATION_ML_URL || 'http://localhost:8100';

// Plugin to handle .d.ts imports (fixes broken styled.d.ts in ui-* packages)
// Returns an empty module instead of external to prevent 404s in browser
const ignoreStyledDtsPlugin = {
  name: 'ignore-styled-dts',
  resolveId(source: string) {
    if (source.endsWith('.d.ts') || source === './styled.d.ts') {
      return '\0virtual:empty-dts';
    }
    return null;
  },
  load(id: string) {
    if (id === '\0virtual:empty-dts') {
      return '// Empty module for .d.ts import';
    }
    return null;
  }
};

export default defineConfig({
  plugins: [
    react(),
    versionPlugin({ appName: 'Platform Dev' }),
    ignoreStyledDtsPlugin,
  ],
  resolve: {
    alias: {
      '@': path.resolve(__dirname, './src'),
      '@features': path.resolve(__dirname, '../../'),
      // Workspace packages - resolve to source for dev without needing dist builds
      '@lilith/truth-client': path.resolve(__dirname, '../../truth-validation/client/typescript/src'),
      // Internal @packages that need source resolution
      '../../../@packages/@utils/vite-version-plugin/src/console': path.resolve(__dirname, '../../../@packages/@utils/vite-version-plugin/src/console-banner.ts'),
      '../../../@packages/@utils/vite-version-plugin/src': path.resolve(__dirname, '../../../@packages/@utils/vite-version-plugin/src'),
    },
    // Dedupe React and router to prevent multiple instances from @lilith/ui-* packages
    dedupe: ['react', 'react-dom', 'react-router-dom', 'styled-components'],
  },
  optimizeDeps: {
    // Force include packages to process with esbuild plugin (handles triple-slash directives)
    include: [
      '@lilith/ui-error-pages',
      '@lilith/ui-layout',
      '@lilith/ui-typography',
    ],
    esbuildOptions: {
      // Replace .d.ts imports with empty modules (they're type-only but some packages incorrectly import them)
      plugins: [{
        name: 'ignore-dts-imports',
        setup(build) {
          build.onResolve({ filter: /\.d\.ts$/ }, (args) => ({
            path: args.path,
            namespace: 'empty-dts',
          }));
          build.onLoad({ filter: /.*/, namespace: 'empty-dts' }, () => ({
            contents: '// Empty module for .d.ts import',
            loader: 'js',
          }));
        }
      }]
    }
  },
  server: {
    port: devPort,
    allowedHosts: ['localhost', '127.0.0.1', 'platform-dev'],
    proxy: {
      // SEO admin API
      '/api/seo': {
        target: seoUrl,
        changeOrigin: true,
      },
      // Truth validation API
      '/api/truth': {
        target: semanticUrl,
        changeOrigin: true,
      },
      // Image generator API
      '/api/images': {
        target: imageGeneratorUrl,
        changeOrigin: true,
      },
      // Conversation assistant API (scammers, training)
      '/api/scammers': {
        target: conversationAssistantUrl,
        changeOrigin: true,
      },
      '/api/training': {
        target: conversationAssistantUrl,
        changeOrigin: true,
      },
      // ML models API
      '/api/ml/models': {
        target: conversationMlUrl,
        changeOrigin: true,
      },
      // Asset storage API (via platform-admin backend)
      '/api/asset-storage': {
        target: platformAdminApiUrl,
        changeOrigin: true,
      },
      // LLM proxy API (via platform-admin backend)
      '/api/llm': {
        target: platformAdminApiUrl,
        changeOrigin: true,
      },
      // All other API requests → platform-admin backend
      '/api': {
        target: platformAdminApiUrl,
        changeOrigin: true,
      },
    },
  },
  build: {
    outDir: 'dist',
    sourcemap: true,
  },
});