import fs from 'node:fs/promises'
import path from 'node:path'
import { fileURLToPath } from 'node:url'
import sharp from 'sharp'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const root = path.resolve(__dirname, '..')
const outThumb = path.join(root, 'public/assets/stage/thumb')
const outFull = path.join(root, 'public/assets/stage/full')

/** @type {{ src: string; name: string; thumbW: number; fullW: number }[]} */
const STAGE_SOURCES = [
  { src: 'public/assets/logo.png', name: 'logo', thumbW: 48, fullW: 512 },
  { src: 'public/assets/qr-contact.png', name: 'qr-contact', thumbW: 48, fullW: 512 },
  { src: 'public/assets/t30-bottle.png', name: 't30-bottle', thumbW: 64, fullW: 800 },
  { src: 'public/assets/brand/emb_p6_5.png', name: 'emb_p6_5', thumbW: 64, fullW: 960 },
  { src: 'public/assets/brand/emb_p33_1.png', name: 'emb_p33_1', thumbW: 64, fullW: 960 },
]

async function ensureDirs() {
  await fs.mkdir(outThumb, { recursive: true })
  await fs.mkdir(outFull, { recursive: true })
}

async function writeThumb(srcPath, name, width) {
  const dest = path.join(outThumb, `${name}.webp`)
  await sharp(srcPath)
    .resize(width, null, { withoutEnlargement: true })
    .blur(2)
    .webp({ quality: 50 })
    .toFile(dest)
  const stat = await fs.stat(dest)
  return { dest, kb: Math.round(stat.size / 1024 * 10) / 10 }
}

async function writeFull(srcPath, name, width) {
  const dest = path.join(outFull, `${name}.webp`)
  await sharp(srcPath)
    .resize(width, null, { withoutEnlargement: true })
    .webp({ quality: 82 })
    .toFile(dest)
  const stat = await fs.stat(dest)
  return { dest, kb: Math.round(stat.size / 1024 * 10) / 10 }
}

async function main() {
  await ensureDirs()
  let thumbTotal = 0
  let fullTotal = 0

  for (const item of STAGE_SOURCES) {
    const srcPath = path.join(root, item.src)
    try {
      await fs.access(srcPath)
    } catch {
      console.warn(`skip (missing): ${item.src}`)
      continue
    }

    const thumb = await writeThumb(srcPath, item.name, item.thumbW)
    const full = await writeFull(srcPath, item.name, item.fullW)
    thumbTotal += thumb.kb
    fullTotal += full.kb
    console.log(`${item.name}: thumb ${thumb.kb} KB, full ${full.kb} KB`)
  }

  console.log(`\nDone. thumb total ~${Math.round(thumbTotal)} KB, full total ~${Math.round(fullTotal)} KB`)
}

main().catch((err) => {
  console.error(err)
  process.exit(1)
})