import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository } from 'typeorm';
import { ReferralProfile } from '../../domain/entities/referral-profile.entity';
import { IReferralProfileRepository } from '../../domain/repositories/referral-profile.repository.interface';

@Injectable()
export class ReferralProfileRepository implements IReferralProfileRepository {
  constructor(
    @InjectRepository(ReferralProfile)
    private readonly repo: Repository<ReferralProfile>,
  ) {}

  async findByUserId(userId: string): Promise<ReferralProfile | null> {
    return this.repo.findOne({ where: { userId } });
  }

  async findByCode(code: string): Promise<ReferralProfile | null> {
    return this.repo.findOne({ where: { referralCode: code.toUpperCase() } });
  }

  async existsByCode(code: string): Promise<boolean> {
    const count = await this.repo.count({ where: { referralCode: code.toUpperCase() } });
    return count > 0;
  }

  async existsByUserId(userId: string): Promise<boolean> {
    const count = await this.repo.count({ where: { userId } });
    return count > 0;
  }

  async findDirectReferrals(
    referrerId: string,
    offset: number,
    limit: number,
  ): Promise<[ReferralProfile[], number]> {
    return this.repo.findAndCount({
      where: { referrerId },
      order: { createdAt: 'DESC' },
      skip: offset,
      take: limit,
    });
  }

  async save(profile: ReferralProfile): Promise<ReferralProfile> {
    return this.repo.save(profile);
  }
}