import { Request, Response, NextFunction } from 'express';
import { ZodError } from 'zod';
import { AppError } from '../lib/utils';

export function errorHandler(
  err: Error,
  _req: Request,
  res: Response,
  _next: NextFunction
) {
  if (err instanceof AppError) {
    return res.status(err.statusCode).json({
      success: false,
      error: err.message,
    });
  }

  if (err instanceof ZodError) {
    const messages = err.errors.map((e) => `${e.path.join('.')}: ${e.message}`);
    return res.status(400).json({
      success: false,
      error: 'Validation failed',
      details: messages,
    });
  }

  console.error('Unhandled error:', err);
  return res.status(500).json({
    success: false,
    error: process.env.NODE_ENV === 'production' ? 'Internal server error' : err.message,
  });
}

export function notFoundHandler(_req: Request, res: Response) {
  res.status(404).json({ success: false, error: 'Route not found' });
}