import { fileURLToPath } from 'node:url';
import { defineConfig, type Plugin } from 'vite';
import react from '@vitejs/plugin-react';
import tailwindcss from '@tailwindcss/vite';
import { execFileSync } from 'node:child_process';

// The demo build: the same renderer, but with the whole core bundled into
// the page and `window.api` served in-process against the in-memory demo
// registrar (src/renderer/api/demo.ts). No server, no storage — a static
// page that runs the app on an invented portfolio.
//
//   npm run demo:build  → dist/demo
//   npm run demo:dev    → vite dev server

// The version the demo shows. demo.dombot.ai deploys every push to main, so
// it runs code newer than the last release; package.json's version would
// name a download that behaves differently. It shows the commit instead:
// dev+a1b2c3d.
function demoVersion(): string {
  let head = process.env.WORKERS_CI_COMMIT_SHA ?? '';
  if (!head) {
    try {
      head = execFileSync('git', ['rev-parse', 'HEAD'], {
        encoding: 'utf8',
        stdio: ['ignore', 'pipe', 'ignore'],
      }).trim();
    } catch {
      // Not a git checkout: plain "dev".
    }
  }
  return head ? `dev+${head.slice(0, 7)}` : 'dev';
}

// The shared index.html carries only what the desktop app needs. The demo is
// a public web page, so give it the same head as the marketing site: a title,
// description, canonical URL, sharing card and favicon. The favicon is the
// site's own file (Vite bundles it as an asset); the card image is served by
// dombot.ai, so there is one copy of each.
const DESCRIPTION =
  'Try DomBot in your browser. All your domains from all your registrars in one app. ' +
  'Track spending, manage in bulk, organize with folders, and connect any agent over MCP. ' +
  'Free and open source.';
const TITLE = 'DomBot Demo — A better way to manage your domain portfolio';

function demoHead(): Plugin {
  return {
    name: 'dombot-demo-head',
    transformIndexHtml: {
      order: 'pre',
      handler(html) {
        const tags = [
          { tag: 'meta', attrs: { name: 'theme-color', content: '#0a0a0a' } },
          { tag: 'meta', attrs: { name: 'description', content: DESCRIPTION } },
          {
            tag: 'link',
            attrs: { rel: 'canonical', href: 'https://demo.dombot.ai/' },
          },
          {
            tag: 'meta',
            attrs: { property: 'og:site_name', content: 'DomBot' },
          },
          { tag: 'meta', attrs: { property: 'og:title', content: TITLE } },
          {
            tag: 'meta',
            attrs: { property: 'og:description', content: DESCRIPTION },
          },
          { tag: 'meta', attrs: { property: 'og:type', content: 'website' } },
          {
            tag: 'meta',
            attrs: { property: 'og:url', content: 'https://demo.dombot.ai/' },
          },
          {
            tag: 'meta',
            attrs: {
              property: 'og:image',
              content: 'https://dombot.ai/og-image.png',
            },
          },
          {
            tag: 'meta',
            attrs: { property: 'og:image:width', content: '1200' },
          },
          {
            tag: 'meta',
            attrs: { property: 'og:image:height', content: '630' },
          },
          {
            tag: 'meta',
            attrs: {
              property: 'og:image:alt',
              content:
                'DomBot Domains screen — every domain across all your registrars in one table',
            },
          },
          {
            tag: 'meta',
            attrs: { name: 'twitter:card', content: 'summary_large_image' },
          },
          {
            tag: 'link',
            attrs: {
              rel: 'icon',
              type: 'image/svg+xml',
              href: '/site/public/favicon.svg',
            },
          },
        ];
        return {
          html: html.replace(
            '<title>DomBot</title>',
            `<title>${TITLE}</title>`,
          ),
          tags: tags.map((t) => ({ ...t, injectTo: 'head' as const })),
        };
      },
    },
  };
}

export default defineConfig({
  plugins: [react(), tailwindcss(), demoHead()],
  base: './',
  define: {
    __APP_VERSION__: JSON.stringify(demoVersion()),
    __DOMBOT_DEMO__: 'true',
  },
  build: {
    outDir: 'dist/demo',
    emptyOutDir: true,
    modulePreload: { polyfill: false },
  },
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('./src/renderer', import.meta.url)),
    },
  },
});