/** Portable ZIP using Node's built-in compression. No system zip command required. */
import { readFile, readdir, writeFile } from "node:fs/promises";
import { deflateRawSync } from "node:zlib";
import { resolve, relative } from "node:path";
import { build, root } from "./build.mjs";
const roots = [
  "src",
  "scripts",
  "assets",
  "tests",
  "dist",
  "captures/current",
  "package.json",
  "package-lock.json",
  "vercel.json",
  ".vercelignore",
  ".gitignore",
  "README.md",
  "ASSETS.md",
  "CAPTURES.md",
  "MOTION.md",
  "CONCEPT-MAP.md",
  "DEPLOYMENT.md",
];
function crc32(bytes) {
  let crc = 0xffffffff;
  for (const byte of bytes) {
    crc ^= byte;
    for (let bit = 0; bit < 8; bit++)
      crc = (crc >>> 1) ^ (crc & 1 ? 0xedb88320 : 0);
  }
  return (crc ^ 0xffffffff) >>> 0;
}
async function filesAt(path) {
  const entries = await readdir(path, { withFileTypes: true });
  const groups = await Promise.all(
    entries
      .sort((a, b) => a.name.localeCompare(b.name))
      .filter((x) => x.name !== ".DS_Store")
      .map((x) =>
        x.isDirectory()
          ? filesAt(resolve(path, x.name))
          : [resolve(path, x.name)],
      ),
  );
  return groups.flat();
}
await build();
const files = [];
for (const name of roots) {
  const path = resolve(root, name);
  if (name.includes(".") && !name.includes("/")) {
    try {
      await readFile(path);
      files.push(path);
    } catch (error) {
      if (name !== ".gitignore" || error.code !== "ENOENT") throw error;
    }
  } else {
    try {
      files.push(...(await filesAt(path)));
    } catch (error) {
      if (name !== "captures/current" || error.code !== "ENOENT") throw error;
    }
  }
}
let offset = 0;
const records = [],
  directory = [];
for (const path of files) {
  const body = await readFile(path),
    data = deflateRawSync(body),
    name = Buffer.from(
      "dualentry-landing/" + relative(root, path).split("\\").join("/"),
    );
  const crc = crc32(body),
    header = Buffer.alloc(30);
  header.writeUInt32LE(0x04034b50, 0);
  header.writeUInt16LE(20, 4);
  header.writeUInt16LE(0x800, 6);
  header.writeUInt16LE(8, 8);
  header.writeUInt16LE(33, 12);
  header.writeUInt32LE(crc, 14);
  header.writeUInt32LE(data.length, 18);
  header.writeUInt32LE(body.length, 22);
  header.writeUInt16LE(name.length, 26);
  const central = Buffer.alloc(46);
  central.writeUInt32LE(0x02014b50, 0);
  central.writeUInt16LE(20, 4);
  central.writeUInt16LE(20, 6);
  central.writeUInt16LE(0x800, 8);
  central.writeUInt16LE(8, 10);
  central.writeUInt16LE(33, 14);
  central.writeUInt32LE(crc, 16);
  central.writeUInt32LE(data.length, 20);
  central.writeUInt32LE(body.length, 24);
  central.writeUInt16LE(name.length, 28);
  central.writeUInt32LE(offset, 42);
  records.push(header, name, data);
  directory.push(central, name);
  offset += header.length + name.length + data.length;
}
const central = Buffer.concat(directory),
  end = Buffer.alloc(22);
end.writeUInt32LE(0x06054b50, 0);
end.writeUInt16LE(files.length, 8);
end.writeUInt16LE(files.length, 10);
end.writeUInt32LE(central.length, 12);
end.writeUInt32LE(offset, 16);
const output = resolve(root, "../dualentry-landing.zip");
await writeFile(output, Buffer.concat([...records, central, end]));
console.log(`Packaged ${files.length} files: ${output}`);