const crypto = require("crypto");
const fs = require("fs");
const path = require("path");
const AdmZip = require("adm-zip");

const root = path.join(__dirname, "..");
const destination = path.join(root, "dist", "lumi-core-1.2.0-to-0.2.0-repair.zip");
const files = [
  "CHANGELOG.md",
  "README.md",
  "package.json",
  "package-lock.json",
  "release-index.json",
  "run.js",
  "update-manifest.json",
  "docs/updates.md",
  "docs/update-audit-0.2.0.md",
  "knowledge/core/lumi-core.md",
  "scripts/verify-release-metadata.js",
  "scripts/verify-all.js",
  "scripts/build-core-repair-patch.js",
  "scripts/verify-core-repair-patch.js",
  "scripts/verify-update-system.js",
  "src/services/dependency-manager.js",
  "src/services/overlay-connectors.js",
  "src/services/repo-update.js",
  "src/services/update-index.js",
  "src/services/update-manager.js",
  "src/services/update-repository.js",
  "src/web/server.js",
  "src/web/views/admin-updates.ejs"
];

const hashes = {};
const zip = new AdmZip();
for (const relativePath of files) {
  const filePath = path.join(root, relativePath);
  if (!fs.statSync(filePath, { throwIfNoEntry: false })?.isFile()) {
    throw new Error(`Repair patch input is missing: ${relativePath}`);
  }
  const contents = fs.readFileSync(filePath);
  hashes[relativePath] = crypto.createHash("sha256").update(contents).digest("hex");
  zip.addFile(relativePath.replace(/\\/g, "/"), contents);
}

const manifest = {
  schema_version: 1,
  name: "Lumi core 0.2.0 repair",
  target: "core",
  from_versions: ["0.1.9", "1.2.0", "0.2.0"],
  to_version: "0.2.0",
  data_policy: "preserve",
  dependency_policy: "sync_on_restart",
  created_at: new Date().toISOString(),
  files: hashes
};
zip.addFile("patch-manifest.json", Buffer.from(`${JSON.stringify(manifest, null, 2)}\n`));
fs.mkdirSync(path.dirname(destination), { recursive: true });
zip.writeZip(destination);
console.log(destination);