#!/usr/bin/env node
/**
 * Single source of truth for the app version: content/changelog.md.
 *
 * Parses the topmost `## X.Y.Z — <date>` heading and propagates it to:
 *   - src/lib/version.ts   (APP_VERSION, shown in the UI sidebar)
 *   - package.json         ("version" field)
 *
 * Runs automatically via the `predev` / `prebuild` npm hooks, so the
 * sidebar version, package.json, and the changelog can never drift.
 * To cut a release, just add a new `## X.Y.Z — <date>` section at the
 * top of content/changelog.md.
 */
import { readFileSync, writeFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import { dirname, join } from "node:path";

const root = join(dirname(fileURLToPath(import.meta.url)), "..");
const changelogPath = join(root, "content", "changelog.md");
const versionTsPath = join(root, "src", "lib", "version.ts");
const pkgPath = join(root, "package.json");

const changelog = readFileSync(changelogPath, "utf-8");
const match = changelog.match(
  /^##\s+(\d+\.\d+\.\d+)(?:\s+[—-]\s+(\d{4}-\d{2}-\d{2}))?/m,
);
if (!match) {
  console.error(
    `[sync-version] No "## X.Y.Z" heading found in ${changelogPath}`,
  );
  process.exit(1);
}
const version = match[1];
const versionDate = match[2] ?? "";

// --- src/lib/version.ts (generated; do not edit by hand) ---------------
const versionTs = `// AUTO-GENERATED by scripts/sync-version.mjs from content/changelog.md.
// Do not edit by hand — change the top "## X.Y.Z" heading in the changelog.
export const APP_VERSION = "${version}";
export const APP_VERSION_DATE = "${versionDate}";
`;
let tsChanged = false;
try {
  tsChanged = readFileSync(versionTsPath, "utf-8") !== versionTs;
} catch {
  tsChanged = true;
}
if (tsChanged) writeFileSync(versionTsPath, versionTs);

// --- package.json "version" -------------------------------------------
const pkgRaw = readFileSync(pkgPath, "utf-8");
const pkg = JSON.parse(pkgRaw);
const pkgChanged = pkg.version !== version;
if (pkgChanged) {
  pkg.version = version;
  writeFileSync(pkgPath, JSON.stringify(pkg, null, 2) + "\n");
}

if (tsChanged || pkgChanged) {
  console.log(
    `[sync-version] Synced to ${version} (` +
      `${tsChanged ? "version.ts" : ""}` +
      `${tsChanged && pkgChanged ? " + " : ""}` +
      `${pkgChanged ? "package.json" : ""}).`,
  );
} else {
  console.log(`[sync-version] Already at ${version}.`);
}