// 出正式文件（2026-10-14 用户选定 C 圆形徽章，三端统一）：
//   ../交付/<端>/favicon.svg（字已转路径，不依赖字体）、favicon-16/32/48.png、favicon.ico（16/32/48 三档 BMP）、apple-touch-icon.png 180、icon-192.png、icon-512.png
// 字形来自 glyphs.json（glyphs.py 用 fontTools 从 PingFang SC Semibold / Inter SemiBold 抽出，1000 UPM，y 向下）。
// 用法：node deliver.mjs
import fs from "fs";
import path from "path";
import { fileURLToPath } from "url";
import { chromium } from "playwright";
import { PNG } from "pngjs";
import { SYS, BLUE } from "./icons.mjs";

const here = path.dirname(fileURLToPath(import.meta.url));
const out = path.resolve(here, "../交付");
const G = JSON.parse(fs.readFileSync(path.join(here, "glyphs.json"), "utf8"));

// 和选型页 C 一致：圆底渐变、r=26 的 55% 白环、白字；汉字 36 号、拉丁 42 号。16px 专用版去掉白环、字放大（汉字 42、拉丁 48）
function svgC(sys, small = false) {
  const g = G[sys.key];
  const size = small ? (sys.cjk ? 42 : 48) : (sys.cjk ? 36 : 42);
  const s = size / 1000;
  const [x0, y0, x1, y1] = g.bbox;
  const tx = 32 - s * (x0 + x1) / 2, ty = 32 - s * (y0 + y1) / 2; // 墨迹包围盒居中
  const ring = small ? "" : `<circle cx="32" cy="32" r="26" fill="none" stroke="#fff" stroke-opacity=".55" stroke-width="1.5"/>`;
  return `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" width="64" height="64"><defs><linearGradient id="g" x1="0" y1="0" x2="1" y2="1"><stop offset="0" stop-color="${BLUE[0]}"/><stop offset="1" stop-color="${BLUE[1]}"/></linearGradient></defs><circle cx="32" cy="32" r="32" fill="url(#g)"/>${ring}<path fill="#fff" transform="translate(${tx.toFixed(2)} ${ty.toFixed(2)}) scale(${s.toFixed(4)})" d="${g.d}"/></svg>`;
}

// ICO：每档一个 32 位 BMP（BITMAPINFOHEADER + 自下而上 BGRA + 全 0 的 AND 掩码）
function ico(pngBuffers) {
  const imgs = pngBuffers.map((b) => PNG.sync.read(b));
  const entries = imgs.map((im) => {
    const { width: w, height: h, data } = im;
    const maskRow = Math.ceil(w / 32) * 4;
    const body = Buffer.alloc(40 + w * h * 4 + maskRow * h);
    body.writeUInt32LE(40, 0); body.writeInt32LE(w, 4); body.writeInt32LE(h * 2, 8);
    body.writeUInt16LE(1, 12); body.writeUInt16LE(32, 14); body.writeUInt32LE(0, 16); body.writeUInt32LE(w * h * 4 + maskRow * h, 20);
    let o = 40;
    for (let y = h - 1; y >= 0; y--) for (let x = 0; x < w; x++) {
      const i = (y * w + x) * 4;
      body[o++] = data[i + 2]; body[o++] = data[i + 1]; body[o++] = data[i]; body[o++] = data[i + 3];
    }
    return { w, h, body };
  });
  const headLen = 6 + 16 * entries.length;
  const head = Buffer.alloc(headLen);
  head.writeUInt16LE(0, 0); head.writeUInt16LE(1, 2); head.writeUInt16LE(entries.length, 4);
  let off = headLen;
  entries.forEach((e, i) => {
    const p = 6 + 16 * i;
    head[p] = e.w >= 256 ? 0 : e.w; head[p + 1] = e.h >= 256 ? 0 : e.h; head[p + 2] = 0; head[p + 3] = 0;
    head.writeUInt16LE(1, p + 4); head.writeUInt16LE(32, p + 6); head.writeUInt32LE(e.body.length, p + 8); head.writeUInt32LE(off, p + 12);
    off += e.body.length;
  });
  return Buffer.concat([head, ...entries.map((e) => e.body)]);
}

const browser = await chromium.launch();
const page = await browser.newPage();
async function raster(svg, n) {
  await page.setViewportSize({ width: n, height: n });
  await page.setContent(`<style>html,body{margin:0;background:transparent}img{display:block}</style><img src="data:image/svg+xml;base64,${Buffer.from(svg).toString("base64")}" width="${n}" height="${n}">`);
  return page.screenshot({ omitBackground: true, clip: { x: 0, y: 0, width: n, height: n } });
}
for (const sys of SYS) {
  const dir = path.join(out, sys.key); fs.mkdirSync(dir, { recursive: true });
  const svg = svgC(sys), svgSmall = svgC(sys, true);
  fs.writeFileSync(path.join(dir, "favicon.svg"), svg + "\n");
  const p16 = await raster(svgSmall, 16), p32 = await raster(svg, 32), p48 = await raster(svg, 48);
  fs.writeFileSync(path.join(dir, "favicon-16.png"), p16);
  fs.writeFileSync(path.join(dir, "favicon-32.png"), p32);
  fs.writeFileSync(path.join(dir, "favicon-48.png"), p48);
  fs.writeFileSync(path.join(dir, "favicon.ico"), ico([p16, p32, p48]));
  fs.writeFileSync(path.join(dir, "apple-touch-icon.png"), await raster(svg, 180));
  fs.writeFileSync(path.join(dir, "icon-192.png"), await raster(svg, 192));
  fs.writeFileSync(path.join(dir, "icon-512.png"), await raster(svg, 512));
  console.log("✓", sys.key, fs.readdirSync(dir).join(" "));
}
// 核对图：左 = 选型页里的 C（文字渲染），右 = 正式文件（路径），64px 放大 3 倍并排；再把 16px 放大 8 倍
const chooser = (k) => fs.readFileSync(path.resolve(here, "../svg", `C-${k}.svg`), "utf8");
const img = (svg, n, z) => `<img src="data:image/svg+xml;base64,${Buffer.from(svg).toString("base64")}" width="${n * z}" height="${n * z}" style="image-rendering:${z > 1 && n <= 32 ? "pixelated" : "auto"};display:block">`;
const pimg = (buf, n, z) => `<img src="data:image/png;base64,${buf.toString("base64")}" width="${n * z}" height="${n * z}" style="image-rendering:pixelated;display:block">`;
let h = `<style>body{margin:16px;font:12px sans-serif;background:#DEE1E6}td{padding:6px 10px;text-align:center}</style><table><tr><th></th><th>选型页 C（文字）</th><th>正式 favicon.svg（路径）</th><th>16px 专用版</th><th>ico 里的 16</th><th>ico 里的 32</th></tr>`;
for (const sys of SYS) {
  const dir = path.join(out, sys.key);
  h += `<tr><td>${sys.short}</td><td>${img(chooser(sys.key), 64, 3)}</td><td>${img(svgC(sys), 64, 3)}</td><td>${img(svgC(sys, true), 64, 3)}</td><td>${pimg(fs.readFileSync(path.join(dir, "favicon-16.png")), 16, 8)}</td><td>${pimg(fs.readFileSync(path.join(dir, "favicon-32.png")), 32, 4)}</td></tr>`;
}
h += "</table>";
await page.setViewportSize({ width: 1100, height: 760 });
await page.setContent(h);
await page.screenshot({ path: path.join(out, "核对.png"), fullPage: true });
await browser.close();
console.log("✓ 核对图", path.join(out, "核对.png"));