import { Injectable, CanActivate, ExecutionContext, Logger } from '@nestjs/common';
import { Reflector } from '@nestjs/core';
import { ROLES_KEY } from 'common/decorators/role.decorator';
import { UserRole } from 'common/enum/UserRole.enum';

@Injectable()
export class RolesGuard implements CanActivate {
  private logger = new Logger('RolesGuard');
  constructor(private readonly reflector: Reflector) {}

  canActivate(context: ExecutionContext): boolean {
    this.logger.debug('Checking roles for request...');
    const requiredRoles = this.reflector.getAllAndOverride<UserRole[]>(ROLES_KEY, [context.getHandler(), context.getClass()]);

    if (!requiredRoles) return true;

    const { user } = context.switchToHttp().getRequest();

    return user && user.role && requiredRoles.includes(user.role);
  }
}