#!/usr/bin/env node
// bankai <command> [entry] [options]
//
//   bankai start <entry>   dev server: Vite + HMR + streaming SSR
//   bankai build <entry>   production build (client bundle, manifest,
//                          service worker, precompression)
//   bankai serve           production server for a built app: static
//                          assets + 103 Early Hints + streaming SSR
//   bankai inspect         size report for the built output
//
// options: --port <n>  --out <dir>  --title <text>
//          --prerender </,/about>  (build: comma-separated routes)
//          --h2                    (serve: HTTP/2 + local cert, so
//                                   browsers act on the Early Hints)

import { parseArgs } from 'node:util'

const { values, positionals } = parseArgs({
  allowPositionals: true,
  options: {
    port: { type: 'string' },
    out: { type: 'string', default: 'dist' },
    title: { type: 'string', default: 'choo' },
    prerender: { type: 'string' },
    h2: { type: 'boolean', default: false }
  }
})

const [command, entry] = positionals
const port = values.port ? Number(values.port) : 8080

try {
  if (command === 'start') {
    requireEntry(entry)
    const { default: dev } = await import('./lib/dev.js')
    const { origin } = await dev({ entry, port, title: values.title })
    console.log(`bankai: dev server streaming on ${origin}`)
  } else if (command === 'build') {
    requireEntry(entry)
    const { default: build } = await import('./lib/build.js')
    const prerender = values.prerender ? values.prerender.split(',').map((r) => r.trim()).filter(Boolean) : []
    const { outDir, compressed, prerendered } = await build({ entry, outDir: values.out, title: values.title, prerender })
    const extra = prerendered.length ? `, ${prerendered.length} route(s) prerendered` : ''
    console.log(`bankai: built to ${outDir} (${compressed} asset(s) precompressed${extra}) — bankai serve to run it`)
  } else if (command === 'serve') {
    const { default: serve } = await import('./lib/serve.js')
    const { origin } = await serve({ outDir: values.out, port, h2: values.h2 })
    console.log(`bankai: production server on ${origin}`)
  } else if (command === 'inspect') {
    const { default: inspect } = await import('./lib/inspect.js')
    await inspect({ outDir: values.out })
  } else {
    console.log('usage: bankai <start|build|serve|inspect> [entry] [--port n] [--out dir] [--title text]')
    process.exit(command ? 1 : 0)
  }
} catch (err) {
  console.error('bankai:', err.message)
  process.exit(1)
}

function requireEntry (value) {
  if (!value) {
    console.error('bankai: an entry module is required, e.g. bankai start app.js')
    process.exit(1)
  }
}