import { BadRequestException, Injectable } from "@nestjs/common";
import slugify from "slugify";
import { In } from "typeorm";

import { AdminMessage, AdsMessage, UserMessage } from "../../../common/enums/message.enum";
import { PaginationUtils } from "../../utils/providers/pagination.utils";
import { PasswordService } from "../../utils/providers/password.service";
import { CreateAdminDto } from "../DTO/create-admin.dto";
import { CreateRoleDto } from "../DTO/create-role.dto";
import { SearchAdminQueryDto } from "../DTO/search-admins-query.dto";
import { SearchRolesQueryDto } from "../DTO/search-roles.dto";
import { PermissionsRepository } from "../repositories/permissions.repository";
import { RoleRepository } from "../repositories/roles.repository";
import { UserRepository } from "../repositories/users.repository";

@Injectable()
export class AdminsService {
  constructor(
    private readonly userRepository: UserRepository,
    private readonly rolesRepository: RoleRepository,
    private readonly permissionsRepository: PermissionsRepository,
    private readonly passwordService: PasswordService,
  ) {}

  async createAdmin(createDto: CreateAdminDto) {
    const existEmail = await this.userRepository.findOneBy({ email: createDto.email });
    if (existEmail) throw new BadRequestException(UserMessage.EMAIL_EXIST);

    const existPhone = await this.userRepository.findOneBy({ phone: createDto.phone });
    if (existPhone) throw new BadRequestException(UserMessage.PHONE_EXIST);

    const role = await this.rolesRepository.findOne({ where: { id: createDto.roleId }, relations: { permissions: true } });
    if (!role) throw new BadRequestException(AdsMessage.ROLE_NOT_FOUND);

    await this.rolesRepository.save(role);

    if (createDto.password !== createDto.repeatPassword) throw new BadRequestException(AdminMessage.PASSWORD_NOT_MATCH);

    const hashedPassword = await this.passwordService.hashPassword(createDto.password);

    const userName = slugify(`${createDto.firstName} ${Date.now().toString().slice(-5)}`, { lower: true, trim: true });

    const adminUser = this.userRepository.create({ ...createDto, roles: [role], password: hashedPassword, userName });
    await this.userRepository.save(adminUser);
    return {
      message: AdminMessage.ADMIN_CREATED,
      adminUser,
    };
  }
  /************************************************************ */

  async createRole(createDto: CreateRoleDto) {
    const existRole = await this.rolesRepository.findOne({ where: { name: createDto.name } });
    if (existRole) throw new BadRequestException(AdminMessage.ROLE_EXIST);

    const permissions = await this.permissionsRepository.findBy({ id: In(createDto.permissions) });
    if (permissions.length !== createDto.permissions.length) throw new BadRequestException(AdminMessage.PERMISSIONS_NOT_FOUND);

    const role = this.rolesRepository.create({ ...createDto, permissions, isAdmin: true });
    await this.rolesRepository.save(role);
    return {
      message: AdminMessage.ROLE_CREATED,
      role,
    };
  }

  /************************************************************ */

  async getAdmins(queryDto: SearchAdminQueryDto) {
    const [users, count] = await this.userRepository.getAdmins(queryDto);

    return {
      users,
      count,
      paginate: true,
    };
  }

  /************************************************************ */

  async getPermissions() {
    const permissions = await this.permissionsRepository.find({ select: { id: true, name: true } });
    return {
      permissions,
    };
  }
  /************************************************************ */

  async getAdminPermissions(userId: string) {
    const user = await this.userRepository.findOne({ where: { id: userId }, relations: { roles: { permissions: true } } });
    if (!user) throw new BadRequestException(UserMessage.USER_NOT_FOUND);

    return {
      permissions: user.roles[0].permissions,
    };
  }
  /************************************************************ */

  async getRoles(queryDto: SearchRolesQueryDto) {
    const { limit, skip } = PaginationUtils(queryDto);
    const queryBuilder = this.rolesRepository.createQueryBuilder("role");

    queryBuilder
      .where("role.isAdmin = :isAdmin", { isAdmin: true })
      //   .leftJoinAndSelect("role.permissions", "permissions")
      .loadRelationCountAndMap("role.userCount", "role.users");

    if (queryDto.q) {
      queryBuilder.andWhere("role.name ILIKE :q", { q: `%${queryDto.q}%` });
    }

    queryBuilder.take(limit).skip(skip).orderBy("role.createdAt", "DESC");

    const [roles, count] = await queryBuilder.getManyAndCount();

    return {
      roles,
      count,
      paginate: true,
    };
  }
}