import fetch from 'node-fetch';

export class MetricsService {
  constructor(apiKey, apiRevision) {
    this.apiKey = apiKey;
    this.apiRevision = apiRevision;
    this.baseUrl = 'https://a.klaviyo.com/api';
  }
  async getMetrics() {
    try {
      const response = await fetch(`${this.baseUrl}/metrics/`, {
        headers: {
          'Authorization': `Klaviyo-API-Key ${this.apiKey}`,
          'revision': this.apiRevision,
          'Content-Type': 'application/json',
          'Accept': 'application/json'
        }
      });

      if (!response.ok) {
        const errorData = await response.json();
        console.error('[MetricsService] API Error:', errorData);
        throw new Error(`Klaviyo API error: ${response.status} ${response.statusText}`);
      }

      const data = await response.json();
      // Sort the results by name before returning
      if (data.data) {
        data.data.sort((a, b) => a.attributes.name.localeCompare(b.attributes.name));
      }

      return data;
    } catch (error) {
      console.error('[MetricsService] Error fetching metrics:', error);
      throw error;
    }
  }
}