import fs from "node:fs";
import { Router } from "express";
import path from "path";
import { fileURLToPath } from "url";

const router = Router();

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const downloadDir = path.resolve(__dirname, "../../downloads/mobile");
const projectRoot = path.resolve("./lstMobile"); // adjust as needed
const appJsonPath = path.join(projectRoot, "app.json");

const raw = fs.readFileSync(appJsonPath, "utf-8");
const config = JSON.parse(raw);

const exp = config.expo;

const currentApk = {
	packageName: exp.android?.package,
	versionName: exp.version,
	versionCode: exp.android?.versionCode,
	minSupportedVersionCode: 1, // keep this custom if needed
	fileName: "lst-mobile.apk",
};

router.get("/version", async (req, res) => {
	const baseUrl = `${req.protocol}://${req.get("host")}`;

	res.json({
		packageName: currentApk.packageName,
		versionName: currentApk.versionName,
		versionCode: currentApk.versionCode,
		minSupportedVersionCode: currentApk.minSupportedVersionCode,
		downloadUrl: `${baseUrl}/lst/api/mobile/apk/latest`,
	});
});

router.get("/apk/latest", (_, res) => {
	const apkPath = path.join(downloadDir, currentApk.fileName);

	if (!fs.existsSync(apkPath)) {
		return res.status(404).json({ success: false, message: "APK not found" });
	}

	res.setHeader("Content-Type", "application/vnd.android.package-archive");
	res.setHeader(
		"Content-Disposition",
		`attachment; filename="${currentApk.fileName}"`,
	);

	return res.sendFile(apkPath);
});

export default router;