import type { Request, Response, NextFunction } from 'express';
import * as reportesService from '../services/reportes.service.js';
import { exportEstadoResultadosToExcel } from '../services/reportes.service.js';

export async function getEstadoResultados(req: Request, res: Response, next: NextFunction) {
  try {
    const { fechaInicio, fechaFin, contribuyenteId } = req.query;
    const now = new Date();
    const inicio = (fechaInicio as string) || `${now.getFullYear()}-01-01`;
    const fin = (fechaFin as string) || now.toISOString().split('T')[0];

    const data = await reportesService.getEstadoResultados(req.tenantPool!, inicio, fin, req.user!.tenantId, contribuyenteId as string | undefined || null);
    res.json(data);
  } catch (error) {
    console.error('[reportes] Error en getEstadoResultados:', error);
    next(error);
  }
}

export async function getFlujoEfectivo(req: Request, res: Response, next: NextFunction) {
  try {
    const { fechaInicio, fechaFin, contribuyenteId } = req.query;
    const now = new Date();
    const inicio = (fechaInicio as string) || `${now.getFullYear()}-01-01`;
    const fin = (fechaFin as string) || now.toISOString().split('T')[0];

    const data = await reportesService.getFlujoEfectivo(req.tenantPool!, inicio, fin, contribuyenteId as string | undefined || null);
    res.json(data);
  } catch (error) {
    next(error);
  }
}

export async function getComparativo(req: Request, res: Response, next: NextFunction) {
  try {
    const { contribuyenteId } = req.query;
    const año = parseInt(req.query.año as string) || new Date().getFullYear();
    const data = await reportesService.getComparativo(req.tenantPool!, año, contribuyenteId as string | undefined || null);
    res.json(data);
  } catch (error) {
    next(error);
  }
}

export async function getCuentasXPagar(req: Request, res: Response, next: NextFunction) {
  try {
    const { fechaInicio, fechaFin, regimen, contribuyenteId } = req.query;
    const now = new Date();
    const inicio = (fechaInicio as string) || `${now.getFullYear()}-01-01`;
    const fin = (fechaFin as string) || now.toISOString().split('T')[0];

    const data = await reportesService.getCuentasXPagar(req.tenantPool!, inicio, fin, regimen as string, contribuyenteId as string | undefined || null);
    res.json(data);
  } catch (error) {
    next(error);
  }
}

export async function getCuentasXCobrar(req: Request, res: Response, next: NextFunction) {
  try {
    const { fechaInicio, fechaFin, regimen, contribuyenteId } = req.query;
    const now = new Date();
    const inicio = (fechaInicio as string) || `${now.getFullYear()}-01-01`;
    const fin = (fechaFin as string) || now.toISOString().split('T')[0];

    const data = await reportesService.getCuentasXCobrar(req.tenantPool!, inicio, fin, regimen as string, contribuyenteId as string | undefined || null);
    res.json(data);
  } catch (error) {
    next(error);
  }
}

export async function getConcentradoRfc(req: Request, res: Response, next: NextFunction) {
  try {
    const { fechaInicio, fechaFin, tipo, contribuyenteId } = req.query;
    const now = new Date();
    const inicio = (fechaInicio as string) || `${now.getFullYear()}-01-01`;
    const fin = (fechaFin as string) || now.toISOString().split('T')[0];
    const tipoRfc = (tipo as 'cliente' | 'proveedor') || 'cliente';

    const data = await reportesService.getConcentradoRfc(req.tenantPool!, inicio, fin, tipoRfc, contribuyenteId as string | undefined || null);
    res.json(data);
  } catch (error) {
    next(error);
  }
}

export async function getEstadoResultadosDetallado(req: Request, res: Response, next: NextFunction) {
  try {
    const { fechaInicio, fechaFin, contribuyenteId, regimen } = req.query;
    const now = new Date();
    const inicio = (fechaInicio as string) || `${now.getFullYear()}-01-01`;
    const fin = (fechaFin as string) || now.toISOString().split('T')[0];

    const data = await reportesService.getEstadoResultadosDetallado(
      req.tenantPool!,
      inicio,
      fin,
      req.user!.tenantId,
      contribuyenteId as string | undefined || null,
      regimen as string | undefined || null,
    );
    res.json(data);
  } catch (error) {
    console.error('[reportes] Error en getEstadoResultadosDetallado:', error);
    next(error);
  }
}

export async function getEstadoResultadosDrillDown(req: Request, res: Response, next: NextFunction) {
  try {
    const { categoria, fechaInicio, fechaFin, contribuyenteId, regimen, rfc } = req.query;
    const now = new Date();
    const inicio = (fechaInicio as string) || `${now.getFullYear()}-01-01`;
    const fin = (fechaFin as string) || now.toISOString().split('T')[0];

    const data = await reportesService.getEstadoResultadosDrillDown(
      req.tenantPool!,
      categoria as string,
      inicio,
      fin,
      contribuyenteId as string | undefined || null,
      regimen as string | undefined || null,
      rfc as string | undefined || null,
    );
    res.json(data);
  } catch (error) {
    console.error('[reportes] Error en getEstadoResultadosDrillDown:', error);
    next(error);
  }
}

export async function exportEstadoResultados(req: Request, res: Response, next: NextFunction) {
  try {
    const { fechaInicio, fechaFin, contribuyenteId, regimen } = req.query;
    const now = new Date();
    const inicio = (fechaInicio as string) || `${now.getFullYear()}-01-01`;
    const fin = (fechaFin as string) || now.toISOString().split('T')[0];

    const buffer = await exportEstadoResultadosToExcel(
      req.tenantPool!,
      inicio,
      fin,
      req.user!.tenantId,
      contribuyenteId as string | undefined || null,
      regimen as string | undefined || null,
    );

    res.setHeader('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
    res.setHeader('Content-Disposition', `attachment; filename="estado-resultados-${inicio}-${fin}.xlsx"`);
    res.send(buffer);
  } catch (error) {
    console.error('[reportes] Error en exportEstadoResultados:', error);
    next(error);
  }
}
