import { Response, NextFunction } from 'express';
import { z } from 'zod';
import { companiesService, CreateCompanyDto, UpdateCompanyDto, CompanyFilters } from './companies.service.js';
import { AuthenticatedRequest } from '../../shared/middleware/auth.middleware.js';
import { ValidationError } from '../../shared/errors/index.js';

const createCompanySchema = z.object({
  name: z.string().min(1, 'El nombre es requerido').max(255),
  legal_name: z.string().max(255).optional(),
  tax_id: z.string().max(50).optional(),
  currency_id: z.string().uuid().optional(),
  parent_company_id: z.string().uuid().optional(),
  settings: z.record(z.any()).optional(),
});

const updateCompanySchema = z.object({
  name: z.string().min(1).max(255).optional(),
  legal_name: z.string().max(255).optional().nullable(),
  tax_id: z.string().max(50).optional().nullable(),
  currency_id: z.string().uuid().optional().nullable(),
  parent_company_id: z.string().uuid().optional().nullable(),
  settings: z.record(z.any()).optional(),
});

const querySchema = z.object({
  search: z.string().optional(),
  parent_company_id: z.string().uuid().optional(),
  page: z.coerce.number().int().positive().default(1),
  limit: z.coerce.number().int().positive().max(100).default(20),
});

class CompaniesController {
  async findAll(req: AuthenticatedRequest, res: Response, next: NextFunction): Promise<void> {
    try {
      const queryResult = querySchema.safeParse(req.query);
      if (!queryResult.success) {
        throw new ValidationError('Parámetros de consulta inválidos', queryResult.error.errors);
      }

      const filters: CompanyFilters = queryResult.data;
      const result = await companiesService.findAll(req.tenantId!, filters);

      res.json({
        success: true,
        data: result.data,
        meta: {
          total: result.total,
          page: filters.page,
          limit: filters.limit,
          totalPages: Math.ceil(result.total / (filters.limit || 20)),
        },
      });
    } catch (error) {
      next(error);
    }
  }

  async findById(req: AuthenticatedRequest, res: Response, next: NextFunction): Promise<void> {
    try {
      const { id } = req.params;
      const company = await companiesService.findById(id, req.tenantId!);

      res.json({
        success: true,
        data: company,
      });
    } catch (error) {
      next(error);
    }
  }

  async create(req: AuthenticatedRequest, res: Response, next: NextFunction): Promise<void> {
    try {
      const parseResult = createCompanySchema.safeParse(req.body);
      if (!parseResult.success) {
        throw new ValidationError('Datos de empresa inválidos', parseResult.error.errors);
      }

      const dto: CreateCompanyDto = parseResult.data;
      const company = await companiesService.create(dto, req.tenantId!, req.user!.userId);

      res.status(201).json({
        success: true,
        data: company,
        message: 'Empresa creada exitosamente',
      });
    } catch (error) {
      next(error);
    }
  }

  async update(req: AuthenticatedRequest, res: Response, next: NextFunction): Promise<void> {
    try {
      const { id } = req.params;
      const parseResult = updateCompanySchema.safeParse(req.body);
      if (!parseResult.success) {
        throw new ValidationError('Datos de empresa inválidos', parseResult.error.errors);
      }

      const dto: UpdateCompanyDto = parseResult.data;
      const company = await companiesService.update(id, dto, req.tenantId!, req.user!.userId);

      res.json({
        success: true,
        data: company,
        message: 'Empresa actualizada exitosamente',
      });
    } catch (error) {
      next(error);
    }
  }

  async delete(req: AuthenticatedRequest, res: Response, next: NextFunction): Promise<void> {
    try {
      const { id } = req.params;
      await companiesService.delete(id, req.tenantId!, req.user!.userId);

      res.json({
        success: true,
        message: 'Empresa eliminada exitosamente',
      });
    } catch (error) {
      next(error);
    }
  }

  async getUsers(req: AuthenticatedRequest, res: Response, next: NextFunction): Promise<void> {
    try {
      const { id } = req.params;
      const users = await companiesService.getUsers(id, req.tenantId!);

      res.json({
        success: true,
        data: users,
      });
    } catch (error) {
      next(error);
    }
  }
}

export const companiesController = new CompaniesController();