import { BadRequestException, Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Role } from '../entities/role.entity';
import { In, Repository } from 'typeorm';

@Injectable()
export class RoleService {
  constructor(
    @InjectRepository(Role)
    private readonly roleRepository: Repository<Role>,
  ) {}

  async findRoleNamesByRoleIds(roleIds: string[]): Promise<string[]> {
    const roles = await this.findRolesByRoleIds(roleIds);
    return roles.map((role) => role.name);
  }

  async findRolesByRoleIds(roleIds: string[]): Promise<Role[]> {
    return this.roleRepository.find({
      where: {
        id: In(roleIds),
      },
    });
  }

  async create(role: Pick<Role, 'name' | 'localName'>): Promise<Role> {
    const newRole = this.roleRepository.create(role);
    return this.roleRepository.save(newRole);
  }

  async list(): Promise<Role[]> {
    return this.roleRepository.find();
  }

  async delete(roleId: string): Promise<void> {
    const existingRole = await this.roleRepository.findOne({
      where: { id: roleId },
    });
    if (!existingRole) {
      throw new BadRequestException('Role not found');
    }
    await this.roleRepository.delete(existingRole.id);
  }
}