import { Request, Response, NextFunction } from 'express';
import { ReportService } from '../../services/analytics/report.service';
import { ApiError } from '../../middleware/errorHandler';

// Validar fechas
const validateDates = (startDateStr: string, endDateStr: string): { startDate: Date; endDate: Date } => {
  const startDate = new Date(startDateStr);
  const endDate = new Date(endDateStr);

  if (isNaN(startDate.getTime()) || isNaN(endDate.getTime())) {
    throw new ApiError('Fechas inválidas', 400);
  }

  if (startDate > endDate) {
    throw new ApiError('La fecha de inicio debe ser anterior a la fecha de fin', 400);
  }

  // Ajustar endDate para incluir todo el día
  endDate.setHours(23, 59, 59, 999);

  return { startDate, endDate };
};

export class ReportController {
  /**
   * GET /analytics/reports/revenue
   * Reporte completo de ingresos
   */
  static async getRevenueReport(req: Request, res: Response, next: NextFunction) {
    try {
      const { startDate: startDateStr, endDate: endDateStr } = req.query;

      if (!startDateStr || !endDateStr) {
        throw new ApiError('Se requieren fechas de inicio y fin', 400);
      }

      const { startDate, endDate } = validateDates(startDateStr as string, endDateStr as string);

      const report = await ReportService.generateRevenueReport(startDate, endDate);

      res.status(200).json({
        success: true,
        data: report,
        meta: {
          reportType: 'revenue',
          generatedAt: new Date().toISOString(),
        },
      });
    } catch (error) {
      next(error);
    }
  }

  /**
   * GET /analytics/reports/occupancy
   * Reporte de ocupación
   */
  static async getOccupancyReport(req: Request, res: Response, next: NextFunction) {
    try {
      const { startDate: startDateStr, endDate: endDateStr } = req.query;

      if (!startDateStr || !endDateStr) {
        throw new ApiError('Se requieren fechas de inicio y fin', 400);
      }

      const { startDate, endDate } = validateDates(startDateStr as string, endDateStr as string);

      const report = await ReportService.generateOccupancyReport(startDate, endDate);

      res.status(200).json({
        success: true,
        data: report,
        meta: {
          reportType: 'occupancy',
          generatedAt: new Date().toISOString(),
        },
      });
    } catch (error) {
      next(error);
    }
  }

  /**
   * GET /analytics/reports/users
   * Reporte de usuarios
   */
  static async getUserReport(req: Request, res: Response, next: NextFunction) {
    try {
      const { startDate: startDateStr, endDate: endDateStr } = req.query;

      if (!startDateStr || !endDateStr) {
        throw new ApiError('Se requieren fechas de inicio y fin', 400);
      }

      const { startDate, endDate } = validateDates(startDateStr as string, endDateStr as string);

      const report = await ReportService.generateUserReport(startDate, endDate);

      res.status(200).json({
        success: true,
        data: report,
        meta: {
          reportType: 'users',
          generatedAt: new Date().toISOString(),
        },
      });
    } catch (error) {
      next(error);
    }
  }

  /**
   * GET /analytics/reports/summary
   * Resumen ejecutivo
   */
  static async getExecutiveSummary(req: Request, res: Response, next: NextFunction) {
    try {
      const { startDate: startDateStr, endDate: endDateStr } = req.query;

      if (!startDateStr || !endDateStr) {
        throw new ApiError('Se requieren fechas de inicio y fin', 400);
      }

      const { startDate, endDate } = validateDates(startDateStr as string, endDateStr as string);

      const summary = await ReportService.getReportSummary(startDate, endDate);

      res.status(200).json({
        success: true,
        data: summary,
        meta: {
          reportType: 'executive-summary',
          generatedAt: new Date().toISOString(),
        },
      });
    } catch (error) {
      next(error);
    }
  }
}

export default ReportController;