import express from 'express';
import { ReportingService } from '../services/reporting.service.js';
import { TimeManager } from '../utils/time.utils.js';

export function createReportingRouter(apiKey, apiRevision) {
  const router = express.Router();
  const reportingService = new ReportingService(apiKey, apiRevision);
  const timeManager = new TimeManager();

  // Get campaign reports by time range
  router.get('/campaigns/:timeRange', async (req, res) => {
    try {
      const { timeRange } = req.params;
      const { startDate, endDate } = req.query;

      let params = {};
      if (timeRange === 'custom' && startDate && endDate) {
        const range = timeManager.getCustomRange(startDate, endDate);
        if (!range) {
          return res.status(400).json({ error: 'Invalid date range' });
        }
        params = { startDate: range.start.toISO(), endDate: range.end.toISO() };
      } else {
        params = { timeRange };
      }

      const data = await reportingService.getCampaignReports(params);
      
      // Transform the data to match the expected format
      const transformedData = {
        data: data.data.map(campaign => ({
          id: campaign.id,
          name: campaign.name,
          subject: campaign.subject,
          send_time: campaign.send_time,
          stats: {
            delivery_rate: campaign.attributes?.statistics?.delivery_rate || 0,
            delivered: campaign.attributes?.statistics?.delivered || 0,
            recipients: campaign.attributes?.statistics?.recipients || 0,
            open_rate: campaign.attributes?.statistics?.open_rate || 0,
            opens_unique: campaign.attributes?.statistics?.opens_unique || 0,
            opens: campaign.attributes?.statistics?.opens || 0,
            click_rate: campaign.attributes?.statistics?.click_rate || 0,
            clicks_unique: campaign.attributes?.statistics?.clicks_unique || 0,
            click_to_open_rate: campaign.attributes?.statistics?.click_to_open_rate || 0,
            conversion_value: campaign.attributes?.statistics?.conversion_value || 0,
            conversion_uniques: campaign.attributes?.statistics?.conversion_uniques || 0
          }
        }))
      };

      res.json(transformedData);
    } catch (error) {
      console.error('[Reporting Route] Error:', error);
      res.status(500).json({ 
        status: 'error', 
        message: error.message,
        details: error.response?.data || null
      });
    }
  });

  return router;
}