import { existsSync, mkdirSync, rmSync, copyFileSync, cpSync, renameSync, writeFileSync } from "node:fs";
import { homedir } from "node:os";
import { basename, join } from "node:path";
import { spawnSync } from "node:child_process";

const root = join(import.meta.dirname, "..");
const electronVersion = "36.9.5";
const cacheRoot = join(homedir(), "Library", "Caches", "electron");
const zipName = `electron-v${electronVersion}-win32-x64.zip`;
const appDir = join(root, "dist", "Vynte Connect-win32-x64");
const zipPath = join(root, "dist", "Vynte-Connect-Windows-x64.zip");

function run(command, args, options = {}) {
  const result = spawnSync(command, args, { stdio: "inherit", ...options });
  if (result.status !== 0) {
    throw new Error(`${command} ${args.join(" ")} failed with exit code ${result.status}`);
  }
}

function findElectronZip(dir) {
  if (!existsSync(dir)) return null;
  const result = spawnSync("find", [dir, "-name", zipName, "-print", "-quit"], { encoding: "utf8" });
  return result.stdout.trim() || null;
}

function sha256(file) {
  const result = spawnSync("shasum", ["-a", "256", file], { encoding: "utf8" });
  if (result.status !== 0) return "unknown";
  return result.stdout.split(/\s+/)[0];
}

const electronZip = findElectronZip(cacheRoot);
if (!electronZip) {
  throw new Error(`Missing ${zipName}. Run npm install once so Electron downloads its Windows runtime.`);
}

mkdirSync(join(root, "dist"), { recursive: true });
rmSync(appDir, { recursive: true, force: true });
rmSync(zipPath, { force: true });
mkdirSync(appDir, { recursive: true });

run("ditto", ["-x", "-k", electronZip, appDir]);
renameSync(join(appDir, "electron.exe"), join(appDir, "Vynte Connect.exe"));

const packagedAppDir = join(appDir, "resources", "app");
mkdirSync(packagedAppDir, { recursive: true });
copyFileSync(join(root, "package.json"), join(packagedAppDir, "package.json"));
cpSync(join(root, "src"), join(packagedAppDir, "src"), { recursive: true });
cpSync(join(root, "resources"), join(packagedAppDir, "resources"), { recursive: true });

writeFileSync(
  join(appDir, "BUILD-INFO.txt"),
  [
    "Vynte Connect for Windows",
    `Electron runtime: ${basename(electronZip)}`,
    `Electron runtime sha256: ${sha256(electronZip)}`,
    "Gateway: https://vpn.vyntehome.com",
    "",
  ].join("\n"),
);

run("zip", ["-qry", zipPath, "."], { cwd: appDir });
console.log(`Packaged ${appDir}`);
console.log(`Created ${zipPath}`);