import { PrismaService } from '@/src/core/prisma/prisma.service'
import { Injectable, NotFoundException } from '@nestjs/common'

@Injectable()
export class ChannelService {
  constructor(
    private readonly prismaService: PrismaService,
  ) {
  }

  public async findRecommendedChannel() {
    return this.prismaService.user.findMany({
      where: { isDeactivated: false },
      orderBy: { followings: { _count: 'desc' } },
      include: { stream: true },
      take: 7,
    })
  }

  public async findByUsername(name: string) {
    const channel = await this.prismaService.user.findUnique({
      where: { name, isDeactivated: false },
      include: {
        socialLink: { orderBy: { position: 'desc' } },
        stream: { include: { category: true } },
        followings: true,
      },
    })

    if (!channel) {
      throw new NotFoundException('Канал не найден')
    }

    return channel
  }

  public async findFollowersCountByChannel(channelId: string) {
    return this.prismaService.follow.count({
      where: { following: { id: channelId } },
    })
  }
}