import { CanActivate, ExecutionContext, Injectable } from '@nestjs/common';
import { Reflector } from '@nestjs/core';
import { Role } from '@wh/shared';
import { ROLES_KEY } from '../decorators/roles.decorator';
import { AuthUser } from '../decorators/current-user.decorator';

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

  canActivate(context: ExecutionContext): boolean {
    const required = this.reflector.getAllAndOverride<Role[]>(ROLES_KEY, [
      context.getHandler(),
      context.getClass(),
    ]);
    if (!required || required.length === 0) {
      return true;
    }
    const { user } = context.switchToHttp().getRequest<{ user?: AuthUser }>();
    return !!user && required.includes(user.role);
  }
}