import { Platform } from 'react-native';
import type { AnalyticsService, AnalyticsProperties, UserProperties } from '../types';

declare global {
  interface Window {
    umami?: {
      track: (event: string | ((props?: any) => void), properties?: any) => void;
      identify: (properties: any) => void;
    };
  }
}

class UmamiAnalyticsService implements AnalyticsService {
  private initialized = false;
  private websiteId =
    process.env.EXPO_PUBLIC_UMAMI_WEBSITE_ID || 'fb5fc77a-ed24-4369-b9f5-7d8a01bc9fa4';
  private scriptUrl =
    process.env.EXPO_PUBLIC_UMAMI_SCRIPT_URL || 'https://umami.manacore.ai/script.js';

  async initialize() {
    if (this.initialized) return;

    // Only initialize on web platform
    if (Platform.OS !== 'web') {
      console.log('[Umami] Skipping initialization - not on web platform');
      return;
    }

    try {
      // Check if Umami is already loaded
      if (typeof window !== 'undefined' && window.umami) {
        this.initialized = true;
        console.log('[Umami] Already loaded');
        return;
      }

      // Create and append the script tag
      if (typeof document !== 'undefined') {
        const script = document.createElement('script');
        script.async = true;
        script.defer = true;
        script.src = this.scriptUrl;
        script.setAttribute('data-website-id', this.websiteId);

        script.onload = () => {
          this.initialized = true;
          console.log('[Umami] Loaded successfully');

          // Track initialization
          this.track('analytics_initialized', {
            platform: 'web',
            service: 'umami',
            timestamp: new Date().toISOString(),
          });
        };

        script.onerror = (error) => {
          console.error('[Umami] Failed to load script:', error);
        };

        document.head.appendChild(script);
      }
    } catch (error) {
      console.error('[Umami] Failed to initialize:', error);
    }
  }

  identify(userId: string, properties?: UserProperties) {
    if (!this.initialized || Platform.OS !== 'web') return;

    try {
      // Umami doesn't have native identify, but we can track it as a custom event
      if (window.umami) {
        window.umami.track('user_identified', {
          userId,
          ...properties,
        });
      }
      console.log('[Umami] User identified:', userId, properties);
    } catch (error) {
      console.warn('[Umami] Failed to identify user:', error);
    }
  }

  track(event: string, properties?: AnalyticsProperties) {
    if (!this.initialized || Platform.OS !== 'web') return;

    try {
      if (window.umami) {
        // Umami expects event name and optional data object
        window.umami.track(event, properties);
      }
      console.log('[Umami] Event tracked:', event, properties);
    } catch (error) {
      console.warn('[Umami] Failed to track event:', error);
    }
  }

  screen(screenName: string, properties?: AnalyticsProperties) {
    if (!this.initialized || Platform.OS !== 'web') return;

    try {
      // Track screen views as page views with custom properties
      if (window.umami) {
        window.umami.track('screen_view', {
          screen: screenName,
          ...properties,
        });
      }
      console.log('[Umami] Screen tracked:', screenName, properties);
    } catch (error) {
      console.warn('[Umami] Failed to track screen:', error);
    }
  }

  reset() {
    if (!this.initialized || Platform.OS !== 'web') return;

    try {
      // Umami doesn't have a reset method, but we can track it as an event
      if (window.umami) {
        window.umami.track('user_reset');
      }
      console.log('[Umami] User reset');
    } catch (error) {
      console.warn('[Umami] Failed to reset:', error);
    }
  }
}

export const umamiService = new UmamiAnalyticsService();