// frontend/src/api/services/external.service.ts
/**
 * External Data Service
 * Handles weather and traffic data operations for the external microservice
 */

import { apiClient } from '../client';
import { RequestTimeouts } from '../client/config';

// Align with backend WeatherDataResponse schema
export interface WeatherData {
  date: string;
  temperature?: number;
  precipitation?: number;
  humidity?: number;
  wind_speed?: number;
  pressure?: number;
  description?: string;
  source: string;
}

// Align with backend TrafficDataResponse schema  
export interface TrafficData {
  date: string;
  traffic_volume?: number;
  pedestrian_count?: number;
  congestion_level?: string;
  average_speed?: number;
  source: string;
}

export interface WeatherForecast {
  date: string;
  temperature_min: number;
  temperature_max: number;
  temperature_avg: number;
  precipitation: number;
  description: string;
  humidity?: number;
  wind_speed?: number;
}

export interface HourlyForecast {
  forecast_datetime: string;
  generated_at: string;
  temperature: number;
  precipitation: number;
  humidity: number;
  wind_speed: number;
  description: string;
  source: string;
  hour: number;
}

export class ExternalService {
  /**
   * Get Current Weather Data
   */
  async getCurrentWeather(
    tenantId: string, 
    lat: number, 
    lon: number
  ): Promise<WeatherData> {
    try {
      // ✅ FIX 1: Correct endpoint path with tenant ID
      const endpoint = `/tenants/${tenantId}/weather/current`;
      
      // ✅ FIX 2: Correct parameter names (latitude/longitude, not lat/lon)
      const response = await apiClient.get(endpoint, {
        params: { 
          latitude: lat,   // Backend expects 'latitude'
          longitude: lon   // Backend expects 'longitude'
        }
      });
      
      console.log('Weather API response:', response);
      
      // Return backend response directly (matches WeatherData interface)
      return response;
      
    } catch (error) {
      console.error('Failed to fetch weather from AEMET API via backend:', error);
      throw new Error(`Weather data unavailable: ${error instanceof Error ? error.message : 'AEMET API connection failed'}`);
    }
  }

  /**
   * Get Weather Forecast
   */
  async getWeatherForecast(
    tenantId: string,
    lat: number, 
    lon: number, 
    days: number = 7
  ): Promise<WeatherForecast[]> {
    try {
      // Fix: Use POST with JSON body as expected by backend
      const response = await apiClient.post(`/tenants/${tenantId}/weather/forecast`, {
        latitude: lat,
        longitude: lon,
        days: days
      });
      
      // Handle response format
      if (Array.isArray(response)) {
        return response;
      } else if (response && response.forecasts) {
        return response.forecasts;
      } else {
        console.warn('Unexpected weather forecast response format:', response);
        return [];
      }
    } catch (error) {
      console.error('Failed to fetch weather forecast from AEMET API:', error);
      throw new Error(`Weather forecast unavailable: ${error instanceof Error ? error.message : 'AEMET API connection failed'}`);
    }
  }

  /**
   * Get Hourly Weather Forecast (NEW)
   */
  async getHourlyWeatherForecast(
    tenantId: string, 
    lat: number, 
    lon: number, 
    hours: number = 48
  ): Promise<HourlyForecast[]> {
    try {
      console.log(`🕒 Fetching hourly weather forecast from AEMET API for tenant ${tenantId}`, {
        latitude: lat,
        longitude: lon,
        hours: hours
      });

      const response = await apiClient.post(`/tenants/${tenantId}/weather/hourly-forecast`, {
        latitude: lat,
        longitude: lon,
        hours: hours
      });
      
      // Handle response format
      if (Array.isArray(response)) {
        return response;
      } else if (response && response.data) {
        return response.data;
      } else {
        console.warn('Unexpected hourly forecast response format:', response);
        return [];
      }
    } catch (error) {
      console.error('Failed to fetch hourly forecast from AEMET API:', error);
      throw new Error(`Hourly forecast unavailable: ${error instanceof Error ? error.message : 'AEMET API connection failed'}`);
    }
  }

  /**
   * Get Historical Weather Data
   */
  async getHistoricalWeather(
    tenantId: string,
    lat: number,
    lon: number,
    startDate: string,
    endDate: string
  ): Promise<WeatherData[]> {
    try {
      // Fix: Use POST with JSON body as expected by backend
      const response = await apiClient.post(`/tenants/${tenantId}/weather/historical`, {
        latitude: lat,
        longitude: lon,
        start_date: startDate,
        end_date: endDate
      });
      
      // Return backend response directly (matches WeatherData interface)
      return Array.isArray(response) ? response : response.data || [];
    } catch (error) {
      console.error('Failed to fetch historical weather from AEMET API:', error);
      throw new Error(`Historical weather data unavailable: ${error instanceof Error ? error.message : 'AEMET API connection failed'}`);
    }
  }

  /**
   * Get Current Traffic Data
   */
  async getCurrentTraffic(
    tenantId: string,
    lat: number,
    lon: number
  ): Promise<TrafficData> {
    try {
      const response = await apiClient.get(`/tenants/${tenantId}/traffic/current`, {
        params: {
          latitude: lat,
          longitude: lon
        }
      });
      
      // Return backend response directly (matches TrafficData interface)
      return response;
    } catch (error) {
      console.error('Failed to fetch traffic data from external API:', error);
      throw new Error(`Traffic data unavailable: ${error instanceof Error ? error.message : 'External API connection failed'}`);
    }
  }

  /**
   * Get Traffic Forecast
   */
  async getTrafficForecast(
    tenantId: string,
    lat: number,
    lon: number,
    hours: number = 24
  ): Promise<TrafficData[]> {
    try {
      // Fix: Use POST with JSON body as expected by backend
      const response = await apiClient.post(`/tenants/${tenantId}/traffic/forecast`, {
        latitude: lat,
        longitude: lon,
        hours: hours
      });
      
      // Return backend response directly (matches TrafficData interface)
      return Array.isArray(response) ? response : response.data || [];
    } catch (error) {
      console.error('Failed to fetch traffic forecast from external API:', error);
      throw new Error(`Traffic forecast unavailable: ${error instanceof Error ? error.message : 'External API connection failed'}`);
    }
  }

  /**
   * Get Historical Traffic Data
   */
  async getHistoricalTraffic(
    tenantId: string,
    lat: number,
    lon: number,
    startDate: string,
    endDate: string
  ): Promise<TrafficData[]> {
    try {
      // Fix: Use POST with JSON body as expected by backend
      const response = await apiClient.post(`/tenants/${tenantId}/traffic/historical`, {
        latitude: lat,
        longitude: lon,
        start_date: startDate,
        end_date: endDate
      });
      
      // Return backend response directly (matches TrafficData interface)
      return Array.isArray(response) ? response : response.data || [];
    } catch (error) {
      console.error('Failed to fetch historical traffic from external API:', error);
      throw new Error(`Historical traffic data unavailable: ${error instanceof Error ? error.message : 'External API connection failed'}`);
    }
  }

  /**
   * Test External Service Connectivity
   */
  async testConnectivity(tenantId: string): Promise<{
    weather: boolean;
    traffic: boolean;
    overall: boolean;
  }> {
    const results = {
      weather: false,
      traffic: false,
      overall: false
    };

    try {
      // Test weather service (AEMET API)
      await this.getCurrentWeather(tenantId, 40.4168, -3.7038); // Madrid coordinates
      results.weather = true;
    } catch (error) {
      console.warn('AEMET weather service connectivity test failed:', error);
      results.weather = false;
    }

    try {
      // Test traffic service
      await this.getCurrentTraffic(tenantId, 40.4168, -3.7038); // Madrid coordinates
      results.traffic = true;
    } catch (error) {
      console.warn('Traffic service connectivity test failed:', error);
      results.traffic = false;
    }

    results.overall = results.weather && results.traffic;
    return results;
  }
}

export const externalService = new ExternalService();