// esbuild build for @hive/dashboard. Output layout (`dist/`):
//
//   dist/index.html               H0M3 menu hub — served by the Rust
//                                  router at GET / (the landing page)
//   dist/dashboard.html           the operator dashboard SPA — served
//                                  at GET /dashboard.html
//   dist/flow.html                served at GET /flow.html
//   dist/logs.html                served at GET /logs.html
//   dist/core.html                served at GET /core.html (C0R3: rebuild
//                                  queue / meta inputs / kept state /
//                                  container load — the old SYST3M tab)
//   dist/static/home.js           index.html (H0M3) entry — menu tiles +
//                                  matrix-tile gating + identity line
//   dist/static/tabs.js           dashboard.html entry — tab renderers +
//                                  tab routing + refreshState
//   dist/static/flow.js           /flow.html entry — broker terminal +
//                                  @-mention composer
//   dist/static/logs.js           /logs.html entry — build/agent/system
//                                  log viewer sub-tabs
//   dist/static/{home,tabs,flow,logs}.js.map source map siblings
//   dist/static/common.css        loaded by every page (@hive/shared
//                                  imports + shared typography/badges/
//                                  buttons/inbox/side-panel)
//   dist/static/dashboard.css     dashboard.html only (dashboard-specific)
//   dist/static/flow.css          /flow.html only (flow chrome + composer)
//   dist/static/logs.css          /logs.html only (log viewer sub-tabs)
//   dist/static/home.css          index.html (H0M3) only (tile grid)
//
// Each JS entry bundles `./common.js` (DOM helpers, Panel singleton,
// NOTIF, path linkification) independently — esbuild inlines the shared
// module into each bundle rather than emitting a shared chunk (no
// `splitting: true`). The Rust binary mounts `dist/` as a
// `tower_http::ServeDir` fallback (`append_index_html_on_directories`
// serves index.html at /); the layout above keeps every URL the HTML
// files reference reachable without rewriting paths in the HTML. The
// dashboard SPA lives at /dashboard.html (a plain file, not a /dashboard/
// prefix) so it never shadows the exact-match /dashboard/stream +
// /dashboard/history SSE routes registered before the ServeDir fallback.

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 });

// Bundle the JS entries. ES-module output, browser target, no minify
// (line-aligned source aids debugging; minification belongs in a later
// follow-up once asset sizes warrant it). esbuild writes each entry
// to `static/<name>.js` based on the entryPoint basename.
await build({
  entryPoints: [src('tabs.js'), src('flow.js'), src('logs.js'), src('home.js'), src('settings.js'), src('stats.js'), src('core.js')],
  outdir: staticDir(''),
  bundle: true,
  format: 'esm',
  platform: 'browser',
  target: ['es2022'],
  sourcemap: true,
  logLevel: 'info',
});

// Stream-worker entry (#448). Lives in a separate bundle: SharedWorker
// scripts run in a different global (`self` is the worker scope, no
// `window`) so they can't be inlined into tabs.js / flow.js. Output is
// at `static/stream-worker.js`; common.js's `openStream` references
// `/static/stream-worker.js` as the SharedWorker URL. `format: 'iife'`
// matches the classic-script load (`new SharedWorker(url, name)` with
// no `{ type: 'module' }`); Firefox is the #448 target and module
// SharedWorker support there is patchy, so keeping the worker as a
// classic script + IIFE bundle is the compatible default. argus nit
// on #453: if a future contributor adds an `import` to this bundle,
// the IIFE format will surface it as a build error rather than
// silently shipping broken code.
await build({
  entryPoints: [src('stream-worker.js')],
  outdir: staticDir(''),
  bundle: true,
  format: 'iife',
  platform: 'browser',
  target: ['es2022'],
  sourcemap: true,
  logLevel: 'info',
});

// Bundle CSS — one entry per page. esbuild resolves @import including
// the package re-exports from @hive/shared. Each page loads colors.css
// (the standalone base16 palette — the theme swap contract, its own file
// so a swap replaces only it) + theme.css (the semantic derivation
// layer) + common.css (shared typography, badges, buttons, inbox, side
// panel) plus its own page-specific bundle.
for (const entry of ['colors.css', 'theme.css', 'common.css', 'dashboard.css', 'flow.css', 'logs.css', 'home.css', 'settings.css', 'stats.css', 'core.css']) {
  await build({
    entryPoints: [src(entry)],
    outfile: staticDir(entry),
    bundle: true,
    loader: { '.css': 'css' },
    logLevel: 'info',
  });
}

for (const html of ['index.html', 'dashboard.html', 'flow.html', 'logs.html', 'settings.html', 'stats.html', 'core.html']) {
  copyFileSync(src(html), dist(html));
}

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