import { Injectable, CanActivate, ExecutionContext } from '@nestjs/common';
import { Reflector } from '@nestjs/core';
import { UserRole } from '@prisma/client';
import { ROLES_KEY } from '../decorators/roles.decorator';

@Injectable()
export class RolesGuard implements CanActivate {
  constructor(private reflector: Reflector) {}

  canActivate(context: ExecutionContext): boolean {
    const required = this.reflector.getAllAndOverride<UserRole[]>(ROLES_KEY, [
      context.getHandler(),
      context.getClass(),
    ]);
    if (!required) return true;
    const { user } = context.switchToHttp().getRequest();
    return required.includes(user?.role);
  }
}