import { BadRequestException, ConflictException, Injectable, NotFoundException } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { BaseService } from 'src/common/base.service';
import { Parents } from 'src/entities/parents.entity';
import { RoleType, Users } from 'src/entities/users.entity';
import { DeepPartial, Repository } from 'typeorm';
import { CreateParentDto } from './dto/create_parents.dto';

@Injectable()
export class ParentsService extends BaseService<Parents> {
    constructor(
        @InjectRepository(Parents) private readonly parentsRepository: Repository<Parents>,
        @InjectRepository(Users) private readonly usersRepository: Repository<Users>,
    ) {
        super(parentsRepository);
    }

    override async create(data: DeepPartial<Parents>): Promise<Parents> {
        const dto = data as CreateParentDto;

        const user = await this.usersRepository.findOneBy({ id: dto.id_utilisateur });
        if (!user) throw new NotFoundException('Utilisateur introuvable');
        if (user.role !== RoleType.PARENT) throw new BadRequestException('Acces reserve aux parents');

        const exist = await this.parentsRepository.findOneBy({ user_id: dto.id_utilisateur });
        if (exist) throw new ConflictException('Ce parent existe deja');

        let co_parent: Users | null = null;
        if (dto.co_parent_id) {
            co_parent = await this.usersRepository.findOneBy({ id: dto.co_parent_id });
            if (!co_parent) throw new NotFoundException('Co-parent introuvable');
            if (co_parent.role !== RoleType.PARENT) throw new BadRequestException('Acces reserve aux parents');
        }
        const entity = this.parentsRepository.create({
            user_id: dto.id_utilisateur,
            user,
            co_parent: co_parent ?? undefined,
        }) as DeepPartial<Parents>;
        return this.parentsRepository.save(entity)
    }

    override async findAll(): Promise<Parents[]> {
        return this.parentsRepository.find({
            relations: ['user', 'co_parent',
                'parentChildren', 'dossiers'],
        });
    }

    override async findOne(user_id: string): Promise<Parents> {
        const parent = await this.parentsRepository.findOne({
            where: { user_id },
            relations: ['user', 'co_parent', 'parentChildren', 'dossiers'],
        });
        if (!parent) throw new NotFoundException('Parent introuvable');
        return parent;
    }
}