/**
 * Cookie Utilities
 * Handles cookie management for WebView authentication
 */

import CookieManager from '@react-native-cookies/cookies';
import { Platform } from 'react-native';
import { ALLOWED_DOMAIN, COOKIE_REFRESH_INTERVAL, INITIAL_COOKIE_DELAY } from './constants';

/**
 * Interface for cookie data
 */
export interface CookieData {
  [key: string]: any;
}

/**
 * Cookie Handler Class
 */
export class CookieHandler {
  private setWebViewCookies: (cookies: string | null) => void;

  constructor(setWebViewCookies: (cookies: string | null) => void) {
    this.setWebViewCookies = setWebViewCookies;
  }

  /**
   * Get WebView cookies for authentication
   * @returns Promise<string | null> - Cookie string or null if not found
   */
  async getWebViewCookies(): Promise<string | null> {
    try {
      console.log('🍪 Requesting cookies using @react-native-cookies/cookies...');
      
      const baseUrl = `${ALLOWED_DOMAIN}`;
      console.log('🍪 Getting cookies for URL:', baseUrl);
      
      let cookieString = '';
      
      // Platform-specific cookie handling
      if (Platform.OS === 'ios') {
        // iOS: Can use getAll()
        try {
          const cookies = await CookieManager.getAll();
          console.log('🍪 iOS - All cookies retrieved:', cookies);
          
          // Filter cookies for our domain
          const domainCookies = Object.keys(cookies).filter(key => 
            key.includes(baseUrl) || key.includes(ALLOWED_DOMAIN.replace('/', ''))
          );
          
          console.log('🍪 iOS - Domain cookies found:', domainCookies);
          
          for (const cookieKey of domainCookies) {
            const cookie = cookies[cookieKey];
            console.log('🍪 iOS - Checking cookie:', cookieKey, cookie);
            
            if (cookie && typeof cookie === 'object') {
              const cookieValue = cookie.value || cookie;
              if (cookieValue && typeof cookieValue === 'string' && cookieValue.includes('session_id=')) {
                const sessionMatch = cookieValue.match(/session_id=([^;]+)/);
                if (sessionMatch) {
                  console.log('✅ iOS - Found session_id in cookie:', sessionMatch[1]);
                }
              }
              
              if (typeof cookie === 'object' && cookie.name && cookie.value) {
                cookieString += `${cookie.name}=${cookie.value}; `;
              } else if (typeof cookie === 'string') {
                cookieString += cookie + '; ';
              }
            }
          }
        } catch (iosError) {
          console.log('⚠️ iOS getAll() failed, trying direct method:', iosError);
        }
      }
      
      // Both platforms: Try getting cookies directly for the domain
      try {
        console.log('🍪 Getting direct cookies for domain:', baseUrl);
        const directCookies = await CookieManager.get(baseUrl);
        console.log('🍪 Direct cookies for domain:', directCookies);
        
        if (directCookies && Object.keys(directCookies).length > 0) {
          // Convert to cookie string format
          const directCookieString = Object.entries(directCookies)
            .map(([name, value]) => `${name}=${value}`)
            .join('; ');
          
          console.log('🍪 Direct cookie string:', directCookieString);
          
          if (directCookieString && directCookieString.includes('session_id')) {
            cookieString = directCookieString;
            console.log('✅ Found session_id in direct cookies:', cookieString);
          } else {
            console.warn('⚠️ Direct cookies found but no session_id:', directCookieString);
          }
        } else {
          console.warn('⚠️ No direct cookies found for domain');
        }
      } catch (directError) {
        console.log('⚠️ Could not get direct cookies:', directError);
      }
      
      // Fallback: Try getting cookies for the WebView URL
      try {
        const webViewUrl = `${ALLOWED_DOMAIN}/web`;
        console.log('🍪 Fallback - Getting cookies for WebView URL:', webViewUrl);
        const webViewCookies = await CookieManager.get(webViewUrl);
        console.log('🍪 WebView cookies:', webViewCookies);
        
        if (webViewCookies && Object.keys(webViewCookies).length > 0) {
          const webViewCookieString = Object.entries(webViewCookies)
            .map(([name, value]) => `${name}=${value}`)
            .join('; ');
          
          if (webViewCookieString && webViewCookieString.includes('session_id')) {
            cookieString = webViewCookieString;
            console.log('✅ Found session_id in WebView cookies:', cookieString);
          }
        }
      } catch (webViewError) {
        console.log('⚠️ Could not get WebView cookies:', webViewError);
      }
      
      if (cookieString && cookieString.includes('session_id')) {
        console.log('✅ Valid session cookies found:', cookieString);
        this.setWebViewCookies(cookieString);
        return cookieString;
      } else {
        console.warn('⚠️ No session_id found in any cookie method');
        console.warn('⚠️ Final cookie string:', cookieString);
        this.setWebViewCookies(null);
        return null;
      }
    } catch (error) {
      console.error('❌ Error getting cookies with @react-native-cookies/cookies:', error);
      this.setWebViewCookies(null);
      return null;
    }
  }

  /**
   * Refresh WebView cookies periodically
   * @returns Function to clear the interval
   */
  refreshWebViewCookies(): () => void {
    // Initial cookie request after a longer delay to ensure WebView is fully loaded and user is logged in
    setTimeout(() => {
      console.log('🔄 Initial cookie refresh after WebView load');
      this.getWebViewCookies();
    }, INITIAL_COOKIE_DELAY);

    // Set up periodic cookie refresh
    const cookieRefreshInterval = setInterval(() => {
      console.log('🔄 Periodic cookie refresh');
      this.getWebViewCookies();
    }, COOKIE_REFRESH_INTERVAL);

    // Return cleanup function
    return () => clearInterval(cookieRefreshInterval);
  }

  /**
   * Get cookies for a specific URL
   * @param url - URL to get cookies for
   * @returns Promise<CookieData | null> - Cookie data or null
   */
  async getCookiesForUrl(url: string): Promise<CookieData | null> {
    try {
      console.log('🍪 Getting cookies for URL:', url);
      const cookies = await CookieManager.get(url);
      console.log('🍪 Cookies for URL:', cookies);
      return cookies;
    } catch (error) {
      console.error('❌ Error getting cookies for URL:', url, error);
      return null;
    }
  }

  /**
   * Set cookies for a specific URL
   * @param url - URL to set cookies for
   * @param cookies - Cookie data to set
   * @returns Promise<boolean> - Success status
   */
  async setCookiesForUrl(url: string, cookies: any): Promise<boolean> {
    try {
      console.log('🍪 Setting cookies for URL:', url, cookies);
      await CookieManager.set(url, cookies);
      console.log('✅ Cookies set successfully for URL:', url);
      return true;
    } catch (error) {
      console.error('❌ Error setting cookies for URL:', url, error);
      return false;
    }
  }

  /**
   * Clear all cookies
   * @returns Promise<boolean> - Success status
   */
  async clearAllCookies(): Promise<boolean> {
    try {
      console.log('🍪 Clearing all cookies');
      await CookieManager.clearAll();
      console.log('✅ All cookies cleared successfully');
      this.setWebViewCookies(null);
      return true;
    } catch (error) {
      console.error('❌ Error clearing cookies:', error);
      return false;
    }
  }

  /**
   * Check if session cookies are valid
   * @param cookies - Cookie string to validate
   * @returns boolean - Whether cookies are valid
   */
  isValidSessionCookie(cookies: string | null): boolean {
    if (!cookies) {
      return false;
    }
    
    const hasSessionId = cookies.includes('session_id=');
    const hasValidFormat = cookies.includes('=') && cookies.includes(';');
    
    console.log('🍪 Cookie validation:', {
      hasSessionId,
      hasValidFormat,
      cookieLength: cookies.length
    });
    
    return hasSessionId && hasValidFormat;
  }
}

/**
 * Create cookie handler instance
 */
export function createCookieHandler(
  setWebViewCookies: (cookies: string | null) => void
): CookieHandler {
  return new CookieHandler(setWebViewCookies);
}