import { getChromePath } from './getChromePath';
import { getProfileDir } from './getProfileDir';
import { isPortInUse } from './isPortInUse';
import { isChromeRunning } from './isChromeRunning';
import { spawn } from 'child_process';
import log from 'electron-log';

const CHROME_CDP_PORT = 9222;
const CHROME_READY_TIMEOUT_MS = 15_000;
const CHROME_READY_POLL_MS = 250;

function sleep(ms: number): Promise<void> {
  return new Promise((resolve) => {
    setTimeout(resolve, ms);
  });
}

async function waitForChromeReady(timeoutMs = CHROME_READY_TIMEOUT_MS): Promise<boolean> {
  const startedAt = Date.now();

  while (Date.now() - startedAt < timeoutMs) {
    if (await isChromeRunning()) {
      return true;
    }
    await sleep(CHROME_READY_POLL_MS);
  }

  return await isChromeRunning();
}

// 启动本地浏览器
export async function launchLocalChrome() {
  const chromePath = getChromePath();
  if (!chromePath) {
    throw new Error(`Unsupported platform for Chrome launch: ${process.platform}`);
  }

  // 多账号隔离
  const profileDir = getProfileDir('default');
  log.info(`Launching Chrome with user data dir: ${profileDir}`);

  // 检查端口是否被占用
  const portInUse = await isPortInUse(CHROME_CDP_PORT);
  const chromeReady = await isChromeRunning();
  
  if (chromeReady) {
    log.info('Chrome DevTools endpoint already available, skip launching.');
    return;
  }

  if (portInUse) {
    throw new Error(`Port ${CHROME_CDP_PORT} is already in use, but Chrome DevTools is unavailable`);
  }

  await new Promise<void>((resolve, reject) => {
    const chromeProcess = spawn(chromePath as string, [
      `--remote-debugging-port=${CHROME_CDP_PORT}`,
      '--window-size=1920,1080',
      '--window-position=0,0',
      '--no-first-run',
      `--user-data-dir=${profileDir}`,
      '--no-default-browser-check',
      'about:blank'
      // '--window-maximized',
    ], {
      detached: true,
      stdio: 'ignore',
    });

    chromeProcess.on('error', (error) => {
      reject(new Error(`Failed to launch Chrome at ${chromePath}: ${error instanceof Error ? error.message : String(error)}`));
    });

    chromeProcess.unref();
    resolve();
  });

  const ready = await waitForChromeReady();
  if (!ready) {
    throw new Error(`Chrome launched but DevTools endpoint http://127.0.0.1:${CHROME_CDP_PORT} was not ready within ${CHROME_READY_TIMEOUT_MS}ms`);
  }
}