const express = require('express');
const puppeteer = require('puppeteer-extra');
const StealthPlugin = require('puppeteer-extra-plugin-stealth');
const randomUseragent = require('random-useragent');
const axios = require('axios');
const fs = require('fs');
const FormData = require('form-data');

puppeteer.use(StealthPlugin());

const app = express();
app.use(express.json());

// Enhanced random delay function
const randomDelay = (min = 100, max = 300) => 
  new Promise(resolve => setTimeout(resolve, Math.random() * (max - min) + min));

// Realistic mouse movement simulation
const humanMouseMove = async (page, selector) => {
  const element = await page.$(selector);
  const box = await element.boundingBox();
  
  // Simulate realistic mouse path
  await page.mouse.move(
    box.x + Math.random() * box.width,
    box.y + Math.random() * box.height,
    { steps: Math.floor(Math.random() * 10) + 5 }
  );
  await randomDelay(50, 150);
};

// Human-like typing with realistic patterns
const humanType = async (page, selector, text, options = {}) => {
  await page.focus(selector);
  await randomDelay(100, 300);
  
  for (let i = 0; i < text.length; i++) {
    const char = text[i];
    await page.keyboard.type(char);
    
    // Realistic typing delays
    let delay = Math.random() * 120 + 50;
    
    // Longer pauses for special characters
    if (['.', '@', '_', '-'].includes(char)) {
      delay += Math.random() * 100;
    }
    
    // Occasional longer pauses (thinking)
    if (Math.random() < 0.1) {
      delay += Math.random() * 400 + 200;
    }
    
    await new Promise(resolve => setTimeout(resolve, delay));
  }
};

// Random scrolling to simulate human behavior
const humanScroll = async (page) => {
  const scrolls = Math.floor(Math.random() * 3) + 1;
  
  for (let i = 0; i < scrolls; i++) {
    const scrollDistance = Math.random() * 500 + 100;
    const direction = Math.random() > 0.5 ? 1 : -1;
    
    await page.evaluate((distance, dir) => {
      window.scrollBy(0, distance * dir);
    }, scrollDistance, direction);
    
    await randomDelay(500, 1500);
  }
  
  // Scroll back to top
  await page.evaluate(() => window.scrollTo(0, 0));
  await randomDelay(300, 800);
};

// Simulate random mouse movements
const simulateHumanActivity = async (page) => {
  // Random mouse movements
  for (let i = 0; i < Math.random() * 5 + 2; i++) {
    await page.mouse.move(
      Math.random() * 1920,
      Math.random() * 1080,
      { steps: Math.floor(Math.random() * 20) + 10 }
    );
    await randomDelay(200, 800);
  }
  
  // Random clicks in empty areas
  if (Math.random() > 0.7) {
    await page.mouse.click(Math.random() * 200 + 100, Math.random() * 200 + 100);
    await randomDelay(100, 300);
  }
};

async function uploadToCatbox(filePath) {
  const form = new FormData();
  form.append('reqtype', 'fileupload');
  form.append('fileToUpload', fs.createReadStream(filePath));
  
  const response = await axios.post('https://catbox.moe/user/api.php', form, {
    headers: form.getHeaders(),
  });
  return response.data;
}

app.post('/login', async (req, res) => {
  const { email, password } = req.body;
  
  if (!email || !password) {
    return res.status(400).json({ error: 'Missing email or password' });
  }
  
  let browser;
  try {
    // Enhanced browser launch options
    browser = await puppeteer.launch({
      headless: true,
      defaultViewport: null,
      args: [
        '--no-sandbox',
        '--disable-setuid-sandbox',
        '--disable-blink-features=AutomationControlled',
        '--disable-dev-shm-usage',
        '--disable-infobars',
        '--disable-extensions',
        '--disable-plugins',
        '--disable-images',
        '--disable-javascript-harmony-shipping',
        '--disable-background-timer-throttling',
        '--disable-backgrounding-occluded-windows',
        '--disable-renderer-backgrounding',
        '--disable-features=TranslateUI',
        '--disable-ipc-flooding-protection',
        '--disable-hang-monitor',
        '--disable-popup-blocking',
        '--disable-prompt-on-repost',
        '--disable-sync',
        '--disable-domain-reliability',
        '--disable-component-extensions-with-background-pages',
        '--no-default-browser-check',
        '--no-first-run',
        '--no-pings',
        '--password-store=basic',
        '--use-mock-keychain',
        '--disable-background-networking',
        '--disable-default-apps',
        '--disable-translate',
        '--disable-device-discovery-notifications',
        '--window-size=1920,1080',
        '--window-position=0,0',
        '--user-agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36'
      ],
      ignoreDefaultArgs: ['--enable-automation'],
      ignoreHTTPSErrors: true,
    });

    const page = await browser.newPage();
    
    // Enhanced stealth configurations
    await page.evaluateOnNewDocument(() => {
      // Remove webdriver property
      Object.defineProperty(navigator, 'webdriver', {
        get: () => undefined,
      });
      
      // Spoof navigator properties
      Object.defineProperty(navigator, 'languages', {
        get: () => ['en-US', 'en'],
      });
      
      Object.defineProperty(navigator, 'plugins', {
        get: () => [
          {
            0: {type: "application/x-google-chrome-pdf", suffixes: "pdf", description: "Portable Document Format", enabledPlugin: "[object Plugin]"},
            description: "Portable Document Format",
            filename: "internal-pdf-viewer",
            length: 1,
            name: "Chrome PDF Plugin"
          },
          {
            0: {type: "application/pdf", suffixes: "pdf", description: "", enabledPlugin: "[object Plugin]"},
            description: "",
            filename: "mhjfbmdgcfjbbpaeojofohoefgiehjai",
            length: 1,
            name: "Chrome PDF Viewer"
          }
        ],
      });
      
      Object.defineProperty(navigator, 'platform', {
        get: () => 'Win32',
      });
      
      Object.defineProperty(navigator, 'hardwareConcurrency', {
        get: () => 8,
      });
      
      Object.defineProperty(navigator, 'deviceMemory', {
        get: () => 8,
      });
      
      // Spoof screen properties
      Object.defineProperty(screen, 'width', {
        get: () => 1920,
      });
      
      Object.defineProperty(screen, 'height', {
        get: () => 1080,
      });
      
      Object.defineProperty(screen, 'colorDepth', {
        get: () => 24,
      });
      
      Object.defineProperty(screen, 'pixelDepth', {
        get: () => 24,
      });
      
      // Override permissions
      const originalQuery = window.navigator.permissions.query;
      window.navigator.permissions.query = (parameters) => (
        parameters.name === 'notifications' ?
          Promise.resolve({ state: Notification.permission }) :
          originalQuery(parameters)
      );
      
      // Spoof timezone
      Date.prototype.getTimezoneOffset = function() {
        return -300; // EST timezone
      };
      
      // Remove automation indicators
      delete navigator.__proto__.webdriver;
      
      // Mock chrome runtime
      window.chrome = {
        runtime: {
          onConnect: undefined,
          onMessage: undefined,
          connect: undefined,
          sendMessage: undefined,
        },
      };
      
      // Spoof canvas fingerprinting
      const getContext = HTMLCanvasElement.prototype.getContext;
      HTMLCanvasElement.prototype.getContext = function(a, b) {
        const context = getContext.call(this, a, b);
        if (a === '2d') {
          const originalIsPointInPath = context.isPointInPath;
          context.isPointInPath = function() {
            return originalIsPointInPath.apply(this, arguments);
          };
        }
        return context;
      };
      
      // Spoof WebGL fingerprinting
      const getParameter = WebGLRenderingContext.prototype.getParameter;
      WebGLRenderingContext.prototype.getParameter = function(parameter) {
        if (parameter === 37445) {
          return 'Intel Open Source Technology Center';
        }
        if (parameter === 37446) {
          return 'Mesa DRI Intel(R) Ivybridge Mobile ';
        }
        return getParameter.call(this, parameter);
      };
    });
    
    // Set realistic viewport and user agent
    const userAgent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36';
    await page.setUserAgent(userAgent);
    
    await page.setViewport({
      width: 1920,
      height: 1080,
      deviceScaleFactor: 1,
      hasTouch: false,
      isLandscape: true,
      isMobile: false,
    });
    
    // Enhanced HTTP headers
    await page.setExtraHTTPHeaders({
      'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8',
      'Accept-Language': 'en-US,en;q=0.9',
      'Accept-Encoding': 'gzip, deflate, br',
      'DNT': '1',
      'Connection': 'keep-alive',
      'Upgrade-Insecure-Requests': '1',
      'Sec-Fetch-Dest': 'document',
      'Sec-Fetch-Mode': 'navigate',
      'Sec-Fetch-Site': 'none',
      'Sec-Fetch-User': '?1',
      'Cache-Control': 'max-age=0',
    });
    
    // Request interception for performance
    await page.setRequestInterception(true);
    page.on('request', (req) => {
      const type = req.resourceType();
      if (['image', 'stylesheet', 'font', 'media'].includes(type)) {
        req.abort();
      } else {
        req.continue();
      }
    });
    
    console.log('🌐 Navigating to login page...');
    await page.goto('https://sso.crunchyroll.com/login', {
      waitUntil: 'networkidle2',
      timeout: 60000,
    });
    
    // Wait and simulate human behavior
    await randomDelay(2000, 4000);
    await simulateHumanActivity(page);
    await humanScroll(page);
    
    // Wait for form elements with better error handling
    try {
      await page.waitForSelector('input[name="email"]', { timeout: 30000 });
      console.log('📧 Email input found');
    } catch (error) {
      console.log('❌ Email input not found, trying alternative selectors');
      await page.waitForSelector('input[type="email"], #email, [placeholder*="email" i]', { timeout: 30000 });
    }
    
    // Simulate human-like interaction with email field
    await humanMouseMove(page, 'input[name="email"]');
    await page.click('input[name="email"]');
    await randomDelay(500, 1200);
    
    // Clear field first (in case there's placeholder text)
    await page.keyboard.down('Control');
    await page.keyboard.press('a');
    await page.keyboard.up('Control');
    await page.keyboard.press('Backspace');
    await randomDelay(200, 500);
    
    await humanType(page, 'input[name="email"]', email);
    console.log('✅ Email entered');
    
    await randomDelay(800, 1500);
    
    // Similar approach for password
    try {
      await page.waitForSelector('input[name="password"]', { timeout: 10000 });
    } catch (error) {
      await page.waitForSelector('input[type="password"], #password, [placeholder*="password" i]', { timeout: 30000 });
    }
    
    await humanMouseMove(page, 'input[name="password"]');
    await page.click('input[name="password"]');
    await randomDelay(300, 800);
    
    await humanType(page, 'input[name="password"]', password);
    console.log('🔒 Password entered');
    
    // Random delay before clicking login
    await randomDelay(1000, 2500);
    await simulateHumanActivity(page);
    
    // Find and interact with login button
    let loginButton;
    try {
      await page.waitForSelector('button[data-t="login-button"]', { visible: true, timeout: 10000 });
      loginButton = 'button[data-t="login-button"]';
    } catch (error) {
      // Try alternative selectors
      const buttonSelectors = [
        'button[type="submit"]',
        'input[type="submit"]',
        'button:contains("Log in")',
        'button:contains("Sign in")',
        '[role="button"]:contains("Log")',
        '.login-button',
        '#login-button'
      ];
      
      for (const selector of buttonSelectors) {
        try {
          await page.waitForSelector(selector, { visible: true, timeout: 2000 });
          loginButton = selector;
          break;
        } catch (e) {
          continue;
        }
      }
    }
    
    if (!loginButton) {
      throw new Error('Login button not found');
    }
    
    // Screenshot before clicking login
    const beforePath = './before-login.png';
    await page.screenshot({ path: beforePath, fullPage: true });
    const beforeUrl = await uploadToCatbox(beforePath);
    console.log('🟡 Before login screenshot uploaded:', beforeUrl);
    
    // Human-like button interaction
    await humanMouseMove(page, loginButton);
    await randomDelay(200, 500);
    
    // Sometimes hover before clicking
    if (Math.random() > 0.5) {
      await page.hover(loginButton);
      await randomDelay(100, 300);
    }
    
    await page.click(loginButton);
    console.log('🔄 Login button clicked');
    
    // Wait for navigation or response
    try {
      await Promise.race([
        page.waitForNavigation({ waitUntil: 'networkidle2', timeout: 45000 }),
        page.waitForSelector('.error, [class*="error"], [id*="error"]', { timeout: 30000 })
          .then(() => { throw new Error('Login error detected'); }),
        new Promise(resolve => setTimeout(resolve, 40000)) // Fallback timeout
      ]);
    } catch (navError) {
      console.log('⚠️ Navigation wait completed with potential issues');
    }
    
    // Additional wait for any dynamic content
    await randomDelay(3000, 6000);
    
    // Screenshot after login attempt
    const afterPath = './after-login.png';
    await page.screenshot({ path: afterPath, fullPage: true });
    const afterUrl = await uploadToCatbox(afterPath);
    console.log('🟢 After login screenshot uploaded:', afterUrl);
    
    const currentUrl = page.url();
    const loginSuccess = !currentUrl.includes('/login') && !currentUrl.includes('sso.crunchyroll.com');
    
    // Additional success indicators
    const hasAuthCookie = (await page.cookies()).some(cookie => 
      cookie.name.toLowerCase().includes('auth') || 
      cookie.name.toLowerCase().includes('session') ||
      cookie.name.toLowerCase().includes('token')
    );
    
    console.log(`🎯 Login Result: ${loginSuccess ? 'SUCCESS' : 'FAILED'}`);
    console.log(`📍 Current URL: ${currentUrl}`);
    console.log(`🍪 Auth cookies present: ${hasAuthCookie}`);
    
    res.json({
      success: loginSuccess,
      currentUrl: currentUrl,
      userAgent: userAgent,
      hasAuthCookie: hasAuthCookie,
      screenshots: {
        before: beforeUrl,
        after: afterUrl
      },
      timestamp: new Date().toISOString()
    });
    
  } catch (err) {
    console.error('❌ Error during login:', err);
    res.status(500).json({ 
      error: 'Login failed', 
      details: err.message,
      timestamp: new Date().toISOString()
    });
  } finally {
    if (browser) {
      await browser.close();
    }
  }
});

const PORT = process.env.PORT || 7860;
app.listen(PORT, () => {
  console.log(`🚀 Enhanced Anti-Detection Server running on port ${PORT}`);
  console.log(`🛡️ Stealth features enabled: Human typing, mouse movement, scrolling, fingerprint spoofing`);
});