// esbuild build for @hive/agent. Output layout (`dist/`):
//
//   dist/index.html            served at GET / (the Preact rewrite,
//                               hyperhive#3685 — app.js is deleted)
//   dist/stats.html            served at GET /stats
//   dist/screen.html           served at GET /screen
//   dist/static/stats.js       served at /static/stats.js (pulls in
//                               chart.js/auto)
//   dist/static/stats.js.map   source map sibling
//   dist/static/main.js        served at /static/main.js (the Preact
//                               bundle — see main.tsx)
//   dist/static/main.js.map    source map sibling
//   dist/static/main.css       served at /static/main.css (bundled
//                               component CSS — see main.tsx's build
//                               step below)
//   dist/static/agent.css      served at /static/agent.css (@import
//                               resolved from @hive/shared)
//
// The in-container Rust binary mounts `dist/` (with per-agent
// `hyperhive.frontend.extraFiles` layered on top) as a
// `tower_http::ServeDir` fallback; the layout above keeps every URL
// the HTML references reachable without rewriting paths.

import { build } from 'esbuild';
import { mkdirSync, copyFileSync, rmSync } from 'node:fs';
import { dirname, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

const here = dirname(fileURLToPath(import.meta.url));
const src = (p) => resolve(here, 'src', p);
const dist = (p) => resolve(here, 'dist', p);
const staticDir = (p) => resolve(here, 'dist', 'static', p);

rmSync(dist(''), { recursive: true, force: true });
mkdirSync(staticDir(''), { recursive: true });

// The stats page's own bundle — chart.js/auto, its own deps.
await build({
  entryPoints: [src('stats.js')],
  outdir: staticDir(''),
  bundle: true,
  format: 'esm',
  platform: 'browser',
  target: ['es2022'],
  sourcemap: true,
  logLevel: 'info',
  // `@hive/shared/modal.js` imports its shadow-DOM component CSS as raw
  // text (see dashboard/build.mjs's matching comment) — same reasoning
  // applies here.
  loader: { '.css': 'text' },
});

// The main agent page (hyperhive#3685's Preact rewrite — app.js,
// which used to share this build step, is deleted). A separate bundle
// from stats.js above rather than folded in: different loader needs
// (`.css: 'css'`, real stylesheets a component imports, vs. the raw-
// text shadow-DOM CSS `stats.js` still needs for `@hive/shared/
// modal.js`) and JSX transpilation, same split swarm-ui's own build
// already makes.
await build({
  entryPoints: [src('main.tsx')],
  outfile: staticDir('main.js'),
  bundle: true,
  format: 'esm',
  platform: 'browser',
  target: ['es2022'],
  sourcemap: true,
  logLevel: 'info',
  jsx: 'automatic',
  jsxImportSource: 'preact',
  loader: { '.css': 'css' },
});

// Bundle the CSS. `colors.css` re-exports the standalone base16 palette
// (the theme swap contract — its own output file so a swap replaces only
// it, no bundle rebuild); `theme.css` is the semantic derivation layer;
// `agent.css`'s @import lines pull in shared base.css + terminal.css from
// the @hive/shared workspace dep.
for (const entry of ['colors.css', 'theme.css', 'agent.css']) {
  await build({
    entryPoints: [src(entry)],
    outfile: staticDir(entry),
    bundle: true,
    loader: { '.css': 'css' },
    logLevel: 'info',
  });
}

for (const html of ['index.html', 'stats.html', 'screen.html']) {
  copyFileSync(src(html), dist(html));
}

console.log('agent build ok →', dist(''));