import { PipeTransform, BadRequestException } from '@nestjs/common';
import { ZodSchema, ZodError } from 'zod';

export class ZodValidationPipe implements PipeTransform {
  constructor(private schema: ZodSchema) {}

  transform(value: unknown) {
    try {
      return this.schema.parse(value);
    } catch (error) {
      if (error instanceof ZodError) {
        const messages = error.errors.map(
          (e) => `${e.path.join('.')}: ${e.message}`,
        );
        throw new BadRequestException(messages.join('; '));
      }
      throw new BadRequestException('Validation failed');
    }
  }
}