#!/usr/bin/env node
import fs from 'fs/promises';
import path from 'path';
import { fileURLToPath } from 'url';
import { spawn } from 'child_process';
import process from 'process';
import puppeteer from 'puppeteer';

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

const VIEWPORT = { width: 390, height: 844, deviceScaleFactor: 3, isMobile: true, hasTouch: true };
const MEDIA_MIME_PREFIXES = ['audio/', 'video/', 'image/'];
const MEDIA_EXTENSIONS = ['.mp3', '.wav', '.ogg', '.aac', '.m4a', '.flac', '.mp4', '.webm', '.ogv', '.avi', '.mov', '.jpg', '.jpeg', '.png', '.gif', '.webp', '.svg', '.bmp', '.ico'];

function getCurrentDate() {
  const now = new Date();
  const year = now.getFullYear();
  const month = String(now.getMonth() + 1).padStart(2, '0');
  const day = String(now.getDate()).padStart(2, '0');
  return `${year}${month}${day}`;
}

function extractPageId(url) {
  const patterns = [
    /storeview\/([a-z0-9]+)/i,
    /\/v\/([a-z0-9]+)/i,
  ];
  for (const pattern of patterns) {
    const match = url.match(pattern);
    if (match && match[1]) {
      return match[1];
    }
  }
  return null;
}

function parseArgs() {
  const args = process.argv.slice(2);
  const pageUrl = args[0];
  if (!pageUrl) {
    console.error('Usage: node run.mjs <page-url>');
    process.exit(1);
  }
  const pageId = extractPageId(pageUrl);
  if (!pageId) {
    console.error('Error: Could not extract page-id from the URL');
    process.exit(1);
  }
  return { pageId, pageUrl };
}

function isMediaUrl(url, mimeType) {
  if (mimeType && MEDIA_MIME_PREFIXES.some(prefix => mimeType.toLowerCase().startsWith(prefix))) {
    return true;
  }
  const lowerUrl = url.toLowerCase();
  return MEDIA_EXTENSIONS.some(ext => lowerUrl.includes(ext));
}

function buildCaptureUrl(pageUrl) {
  const pageId = extractPageId(pageUrl);
  return `https://ca.rrx.cn/v/${pageId}?rrxsrc=2&iframe=1&tpl=1`;
}

async function captureNetworkAndScreenshot(browser, captureUrl, pageId, today) {
  const page = await browser.newPage();
  const requests = [];
  
  page.on('request', request => {
    const url = request.url();
    const resourceType = request.resourceType();
    if (['image', 'media', 'font'].includes(resourceType)) {
      requests.push(url);
    }
  });
  
  page.on('response', response => {
    const url = response.url();
    const headers = response.headers();
    const mimeType = headers['content-type'] || '';
    if (isMediaUrl(url, mimeType)) {
      if (!requests.includes(url)) {
        requests.push(url);
      }
    }
  });
  
  await page.emulate(VIEWPORT);
  await page.setViewport(VIEWPORT);
  
  console.log('Navigating to:', captureUrl);
  await page.goto(captureUrl, { waitUntil: 'networkidle2', timeout: 30000 });
  
  await new Promise(resolve => setTimeout(resolve, 3000));
  
  let pageTitle = 'page';
  try {
    pageTitle = await page.title();
    pageTitle = pageTitle.replace(/[<>:"/\\|?*]/g, '').trim().slice(0, 100) || 'page';
  } catch {}
  
  const destRoot = path.join('downloads', `${today}-${pageTitle}-${pageId}`);
  await fs.mkdir(destRoot, { recursive: true });
  const screenshotPath = path.join(destRoot, 'index.png');
  console.log('Taking screenshot...');
  await page.screenshot({ path: screenshotPath, fullPage: false });
  console.log('Screenshot saved:', screenshotPath);
  
  const mediaUrls = [...new Set(requests.filter(url => isMediaUrl(url, null)))];
  return { page, mediaUrls, pageTitle };
}

function runDownloadScript(pageId, title, urlsFile, sourcesFile) {
  return new Promise((resolve) => {
    const args = [
      'download.mjs',
      '--page-id', pageId,
      '--title', title,
      '--urls', urlsFile,
      '--sources', sourcesFile,
    ];
    const proc = spawn('node', args, { stdio: 'inherit' });
    proc.on('close', resolve);
  });
}

async function main() {
  const { pageId, pageUrl } = parseArgs();
  console.log('Extracted page-id:', pageId);
  
  const today = getCurrentDate();
  const tempDir = 'temp';
  await fs.mkdir(tempDir, { recursive: true });
  
  const urlsFile = path.join(tempDir, 'urls.txt');
  const sourcesFile = path.join(tempDir, 'sources.txt');
  await fs.writeFile(sourcesFile, pageUrl + '\n', 'utf-8');
  
  console.log('Launching browser...');
  const browser = await puppeteer.launch({ headless: 'new' });
  
  const captureUrl = buildCaptureUrl(pageUrl);
  console.log('Capture URL:', captureUrl);
  
  try {
    const { page, mediaUrls, pageTitle } = await captureNetworkAndScreenshot(browser, captureUrl, pageId, today);
    console.log('Found', mediaUrls.length, 'media URLs');
    
    if (mediaUrls.length > 0) {
      await fs.writeFile(urlsFile, mediaUrls.join('\n') + '\n', 'utf-8');
      await runDownloadScript(pageId, pageTitle, urlsFile, sourcesFile);
    } else {
      console.log('No media URLs found, skipping download');
    }
    
    console.log('Closing captured page...');
    await page.close();
  } catch (error) {
    console.error('Error during capture:', error.message);
  }
  
  console.log('Closing browser...');
  await browser.close();
  console.log('Workflow completed.');
}

main().catch(err => {
  console.error(err);
  process.exit(1);
});