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

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

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