/**
 * Assets brand Ultimail générés depuis le mark vectoriel plat 4 couleurs :
 * - source : public/ultimail-mark.svg
 *
 * Sorties :
 * - public/brand/ultimail-header-icon.png (288, transparent)
 * - public/brand/ultimail-mark.{png,jpg} (256)
 * - public/brand/ultimail-wordmark-stacked.{png,jpg} + -dark.png (800×800)
 * - public/brand/ultimail-wordmark-horizontal.{png,jpg} (1600×460)
 * - app/icon.png (32) + app/apple-icon.png (180, fond blanc)
 *
 * pnpm run brand:ultimail
 */
import { mkdirSync, readFileSync } from "node:fs"
import { dirname, join } from "node:path"
import { fileURLToPath } from "node:url"
import sharp from "sharp"

const __dirname = dirname(fileURLToPath(import.meta.url))
const root = join(__dirname, "..")
const markPath = join(root, "public/ultimail-mark.svg")
const brandDir = join(root, "public/brand")
const appDir = join(root, "app")

const FONT = "Helvetica Neue, Helvetica, Arial, sans-serif"

/** Contenu interne du mark (sans la balise <svg>), pour l'inliner dans les lockups. */
function markInnerSvg() {
  const raw = readFileSync(markPath, "utf8")
  const open = raw.indexOf(">", raw.indexOf("<svg"))
  const close = raw.lastIndexOf("</svg>")
  return raw.slice(open + 1, close)
}

/** Wordmark empilé 800×800 : mark + « Ultimail » dessous. */
function stackedSvg(textColor) {
  const inner = markInnerSvg()
  return `<svg xmlns="http://www.w3.org/2000/svg" width="800" height="800" viewBox="0 0 800 800">
  <g transform="translate(248 160) scale(7.6)">${inner}</g>
  <text x="400" y="612" text-anchor="middle" font-family="${FONT}" font-size="104" font-weight="700" letter-spacing="-2" fill="${textColor}">Ultimail</text>
</svg>`
}

/** Wordmark horizontal 1600×460 : mark à gauche, « Ultimail » à droite. */
function horizontalSvg(textColor) {
  const inner = markInnerSvg()
  return `<svg xmlns="http://www.w3.org/2000/svg" width="1600" height="460" viewBox="0 0 1600 460">
  <g transform="translate(80 70) scale(8)">${inner}</g>
  <text x="460" y="298" font-family="${FONT}" font-size="190" font-weight="700" letter-spacing="-5" fill="${textColor}">Ultimail</text>
</svg>`
}

async function writeSvgPng(svg, outPath, { background } = {}) {
  let pipe = sharp(Buffer.from(svg), { density: 144 })
  if (background) pipe = pipe.flatten({ background })
  await pipe.png({ compressionLevel: 9 }).toFile(outPath)
  console.log("Wrote", outPath.replace(`${root}/`, ""))
}

async function writeSvgJpg(svg, outPath) {
  await sharp(Buffer.from(svg), { density: 144 })
    .flatten({ background: "#ffffff" })
    .jpeg({ quality: 92, mozjpeg: true })
    .toFile(outPath)
  console.log("Wrote", outPath.replace(`${root}/`, ""))
}

async function writeMarkPng(outPath, size, { background } = {}) {
  let pipe = sharp(markPath, { density: 300 }).resize(size, size, {
    fit: "contain",
    background: { r: 0, g: 0, b: 0, alpha: 0 },
  })
  if (background) pipe = pipe.flatten({ background })
  await pipe.png({ compressionLevel: 9 }).toFile(outPath)
  console.log("Wrote", outPath.replace(`${root}/`, ""))
}

async function main() {
  mkdirSync(brandDir, { recursive: true })

  // Picto seul
  await writeMarkPng(join(brandDir, "ultimail-header-icon.png"), 288)
  await writeMarkPng(join(brandDir, "ultimail-mark.png"), 256)
  await sharp(join(brandDir, "ultimail-mark.png"))
    .flatten({ background: "#ffffff" })
    .jpeg({ quality: 92, mozjpeg: true })
    .toFile(join(brandDir, "ultimail-mark.jpg"))

  // Wordmarks
  await writeSvgPng(stackedSvg("#202124"), join(brandDir, "ultimail-wordmark-stacked.png"))
  await writeSvgJpg(stackedSvg("#202124"), join(brandDir, "ultimail-wordmark-stacked.jpg"))
  await writeSvgPng(stackedSvg("#e8eaed"), join(brandDir, "ultimail-wordmark-stacked-dark.png"))
  await writeSvgPng(horizontalSvg("#202124"), join(brandDir, "ultimail-wordmark-horizontal.png"))
  await writeSvgJpg(horizontalSvg("#202124"), join(brandDir, "ultimail-wordmark-horizontal.jpg"))

  // Favicons Next.js (conventions app/)
  await writeMarkPng(join(appDir, "icon.png"), 32)
  await writeMarkPng(join(appDir, "apple-icon.png"), 180, { background: "#ffffff" })
}

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