import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository } from 'typeorm';
import { UserRole } from '../users/enums/user-role.enum';
import { AuthUser } from '../auth/interfaces/auth-user.interface';
import { UserPermission } from './entities/user-permission.entity';

@Injectable()
export class AuthorizationService {
  constructor(
    @InjectRepository(UserPermission)
    private readonly userPermissionsRepository: Repository<UserPermission>,
  ) {}

  async loadPermissions(userId: string): Promise<string[]> {
    const userPermissions = await this.userPermissionsRepository.find({
      where: { userId },
      relations: { permission: true },
    });

    return userPermissions.map((up) => up.permission.code);
  }

  hasPermission(user: AuthUser, code: string): boolean {
    return user.permissions.includes(code);
  }

  isAdmin(user: AuthUser): boolean {
    return user.role === UserRole.ADMIN;
  }
}