/// <reference types="vitest" />

/**
 * GoChat frontend Vite config — decoupled from Rails.
 *
 * Originally Chatwoot used vite-plugin-ruby which auto-discovers entrypoints
 * from app/javascript/entrypoints/ via config/vite.json. We replaced it with
 * explicit rollupOptions.input so the frontend builds as a standalone Vite app
 * that talks to the GoChat Go backend (no Ruby/Rails required).
 *
 * Entry points (mirrors app/javascript/entrypoints/):
 *   dashboard  — agent dashboard SPA (mounted at #app via /app/*)
 *   widget     — customer-facing web widget
 *   portal     — help-center portal
 *   sdk        — standalone SDK (library mode, built separately)
 *   superadmin — super admin panel
 *   survey     — CSAT survey form
 *   v3app      — v3 login/signup flow
 */
import { defineConfig } from 'vite';
import path from 'path';
import vue from '@vitejs/plugin-vue';
import yaml from '@rollup/plugin-yaml';

const isLibraryMode = process.env.BUILD_MODE === 'library';
const isTestMode = process.env.TEST === 'true';

const vueOptions = {
  template: {
    compilerOptions: {
      isCustomElement: (tag: string) => ['ninja-keys'].includes(tag),
    },
  },
};

const resolveAliases = {
  vue: 'vue/dist/vue.esm-bundler.js',
  components: path.resolve(__dirname, './app/javascript/dashboard/components'),
  next: path.resolve(__dirname, './app/javascript/dashboard/components-next'),
  v3: path.resolve(__dirname, './app/javascript/v3'),
  dashboard: path.resolve(__dirname, './app/javascript/dashboard'),
  helpers: path.resolve(__dirname, './app/javascript/shared/helpers'),
  shared: path.resolve(__dirname, './app/javascript/shared'),
  survey: path.resolve(__dirname, './app/javascript/survey'),
  widget: path.resolve(__dirname, './app/javascript/widget'),
  assets: path.resolve(__dirname, './app/javascript/dashboard/assets'),
  vuedraggable: path.resolve(
    __dirname,
    './node_modules/vuedraggable/src/vuedraggable.js'
  ),
  '@material/mwc-icon': path.resolve(
    __dirname,
    './app/javascript/shared/components/MaterialIconElement.js'
  ),
};

// Entrypoints that vite-plugin-ruby used to auto-discover
const entrypoints = {
  dashboard: path.resolve(__dirname, './index.html'),
  widget: path.resolve(__dirname, './widget.html'),
  portal: path.resolve(__dirname, './app/javascript/entrypoints/portal.js'),
  superadmin: path.resolve(
    __dirname,
    './app/javascript/entrypoints/superadmin.js'
  ),
  superadmin_pages: path.resolve(
    __dirname,
    './app/javascript/entrypoints/superadmin_pages.js'
  ),
  survey: path.resolve(__dirname, './app/javascript/entrypoints/survey.js'),
  v3app: path.resolve(__dirname, './app/javascript/entrypoints/v3app.js'),
};

let plugins = [vue(vueOptions), yaml()];

if (isLibraryMode) {
  plugins = [];
} else if (isTestMode) {
  plugins = [vue(vueOptions), yaml()];
}

export default defineConfig({
  plugins,
  define: {
    __INTLIFY_JIT_COMPILATION__: true,
    regeneratorRuntime: 'globalThis.regeneratorRuntime',
  },
  css: {
    preprocessorOptions: {
      scss: {
        api: 'modern-compiler',
        quietDeps: true,
        silenceDeprecations: ['import', 'global-builtin'],
      },
    },
  },
  // Dev server: SPA mode for dashboard + widget.html route
  server: {
    host: '0.0.0.0',
    port: 5000,
    strictPort: true, // port conflict → refuse to start instead of auto-incrementing
    // Serve widget.html for /widget path (widget iframe), index.html for SPA routes
    historyApiFallback: {
      rewrites: [
        { from: /^\/widget/, to: '/widget.html' },
        { from: /^\/super_admin/, to: '/super_admin.html' },
      ],
    },
    proxy: {
      '/api': {
        target: process.env.VITE_API_HOST || 'http://127.0.0.1:3000',
        changeOrigin: true,
      },
      '/auth': {
        target: process.env.VITE_API_HOST || 'http://127.0.0.1:3000',
        changeOrigin: true,
      },
      '/platform': {
        target: process.env.VITE_API_HOST || 'http://127.0.0.1:3000',
        changeOrigin: true,
      },
      '/profile': {
        target: process.env.VITE_API_HOST || 'http://127.0.0.1:3000',
        changeOrigin: true,
      },
      '/uploads': {
        target: process.env.VITE_API_HOST || 'http://127.0.0.1:3000',
        changeOrigin: true,
      },
      '/cable': {
        target: process.env.VITE_API_HOST || 'http://127.0.0.1:3000',
        ws: true,
        changeOrigin: true,
      },
      '/health': {
        target: process.env.VITE_API_HOST || 'http://127.0.0.1:3000',
        changeOrigin: true,
      },
      '/runtime-config.js': {
        target: process.env.VITE_API_HOST || 'http://127.0.0.1:3000',
        changeOrigin: true,
      },
      '/widget': {
        target: process.env.VITE_API_HOST || 'http://127.0.0.1:3000',
        changeOrigin: true,
        // Let Vite handle the /widget standalone HTML page (rewrite to /widget.html),
        // proxy everything else (API calls: /widget/init, /widget/conversations, etc.)
        bypass(req) {
          if (req.headers.accept?.includes('text/html')) {
            return '/widget.html';
          }
        },
      },
    },
  },
  build: {
    outDir: 'dist',
    // Dashboard is a 3 MB entry; warn only when it grows beyond that budget.
    chunkSizeWarningLimit: 3000,
    rollupOptions: {
      input: isLibraryMode ? undefined : entrypoints,
      output: {
        // [NOTE] when not in library mode, no new keys will be added or overwritten
        ...(isLibraryMode
          ? {
              dir: 'dist/sdk',
              entryFileNames: (chunkInfo: { name: string }) => {
                if (chunkInfo.name === 'sdk') {
                  return 'js/sdk.js';
                }
                return '[name].js';
              },
            }
          : {}),
        inlineDynamicImports: isLibraryMode, // Disable code-splitting for SDK
      },
    },
    lib: isLibraryMode
      ? {
          entry: path.resolve(__dirname, './app/javascript/entrypoints/sdk.js'),
          formats: ['iife'] as const, // IIFE format for single file
          name: 'sdk',
        }
      : undefined,
  },
  resolve: {
    alias: resolveAliases,
  },
  test: {
    environment: 'jsdom',
    include: ['app/**/*.{test,spec}.?(c|m)[jt]s?(x)'],
    coverage: {
      reporter: ['lcov', 'text'],
      include: ['app/**/*.js', 'app/**/*.vue'],
      exclude: [
        'app/**/*.@(spec|stories|routes).js',
        '**/specs/**/*',
        '**/i18n/**/*',
      ],
    },
    globals: true,
    outputFile: 'coverage/sonar-report.xml',
    pool: 'threads',
    poolOptions: {
      threads: {
        singleThread: false,
      },
    },
    server: {
      deps: {
        inline: ['tinykeys', '@material/mwc-icon'],
      },
    },
    setupFiles: ['fake-indexeddb/auto', 'vitest.setup.js'],
    mockReset: true,
    clearMocks: true,
  },
});