#!/usr/bin/env node

import { spawn, execSync } from "node:child_process";
import puppeteer from "puppeteer-core";
import { homedir, platform } from "node:os";
import { existsSync } from "node:fs";

const useProfile = process.argv[2] === "--profile";

if (process.argv[2] && process.argv[2] !== "--profile") {
	console.log("Usage: browser-start.js [--profile]");
	console.log("\nOptions:");
	console.log("  --profile  Copy your default browser profile (cookies, logins)");
	process.exit(1);
}

const SCRAPING_DIR = `${homedir()}/.cache/browser-tools`;

// Check if already running on :9222
try {
	const browser = await puppeteer.connect({
		browserURL: "http://localhost:9222",
		defaultViewport: null,
	});
	await browser.disconnect();
	console.log("✓ Browser already running on :9222");
	process.exit(0);
} catch {}

// Detect platform and find browser binary
const isMac = platform() === "darwin";
const isLinux = platform() === "linux";

function findBrowser() {
	// Try to find browser using `which` command
	const candidates = isMac
		? ["Helium", "Google Chrome", "Chromium", "Microsoft Edge"]
		: ["helium", "chromium", "google-chrome", "google-chrome-stable", "chrome", "brave", "edge"];

	for (const name of candidates) {
		try {
			if (isMac) {
				// On macOS, check /Applications
				const appPath = `/Applications/${name}.app/Contents/MacOS/${name}`;
				if (existsSync(appPath)) {
					return appPath;
				}
			} else {
				// On Linux, use `which`
				const result = execSync(`which ${name} 2>/dev/null`, { encoding: "utf-8" }).trim();
				if (result) return result;
			}
		} catch {}
	}
	return null;
}

function findProfilePath() {
	const home = homedir();
	if (isMac) {
		return [
			`${home}/Library/Application Support/Helium`,
			`${home}/Library/Application Support/Google/Chrome`,
			`${home}/Library/Application Support/Google/Chrome Canary`,
			`${home}/Library/Application Support/Chromium`,
			`${home}/Library/Application Support/Microsoft Edge`,
		];
	} else {
		return [
			`${home}/.config/helium`,
			`${home}/.config/chromium`,
			`${home}/.config/google-chrome`,
			`${home}/.config/google-chrome-stable`,
			`${home}/.config/BraveSoftware/Brave-Browser`,
			`${home}/.config/microsoft-edge`,
		];
	}
}

const browserPath = findBrowser();
if (!browserPath) {
	console.error("✗ Could not find a Chromium-based browser (tried: helium, chromium, google-chrome, edge, brave)");
	process.exit(1);
}

// Setup profile directory
execSync(`mkdir -p "${SCRAPING_DIR}"`, { stdio: "ignore" });

// Remove SingletonLock to allow new instance
try {
	execSync(`rm -f "${SCRAPING_DIR}/SingletonLock" "${SCRAPING_DIR}/SingletonSocket" "${SCRAPING_DIR}/SingletonCookie"`, { stdio: "ignore" });
} catch {}

if (useProfile) {
	console.log("Syncing profile...");
	const profilePaths = findProfilePath();
	let synced = false;

	for (const sourcePath of profilePaths) {
		if (existsSync(sourcePath)) {
			try {
				execSync(
					`rsync -a --delete \
						--exclude='SingletonLock' \
						--exclude='SingletonSocket' \
						--exclude='SingletonCookie' \
						--exclude='*/Sessions/*' \
						--exclude='*/Current Session' \
						--exclude='*/Current Tabs' \
						--exclude='*/Last Session' \
						--exclude='*/Last Tabs' \
						"${sourcePath}/" "${SCRAPING_DIR}/"`,
					{ stdio: "pipe" },
				);
				console.log(`✓ Synced profile from ${sourcePath}`);
				synced = true;
				break;
			} catch (e) {
				// Try next path
			}
		}
	}

	if (!synced) {
		console.log("⚠ No existing browser profile found, starting fresh");
	}
}

// Start browser with remote debugging
spawn(
	browserPath,
	[
		"--remote-debugging-port=9222",
		`--user-data-dir=${SCRAPING_DIR}`,
		"--no-first-run",
		"--no-default-browser-check",
	],
	{ detached: true, stdio: "ignore" },
).unref();

// Wait for browser to be ready
let connected = false;
for (let i = 0; i < 30; i++) {
	try {
		const browser = await puppeteer.connect({
			browserURL: "http://localhost:9222",
			defaultViewport: null,
		});
		await browser.disconnect();
		connected = true;
		break;
	} catch {
		await new Promise((r) => setTimeout(r, 500));
	}
}

if (!connected) {
	console.error("✗ Failed to connect to browser");
	process.exit(1);
}

console.log(`✓ Browser started on :9222${useProfile ? " with your profile" : ""}`);