import { BadRequestException, Injectable, NotFoundException } from '@nestjs/common';

import { PrismaService } from '@/src/core/prisma/prisma.service';
import { ChangeChatSettingsInput } from '@/src/module/chat/input/change-chat-settings.input';
import { SendMessageInput } from '@/src/module/chat/input/send-message.input';
import { Stream, User } from '@prisma/generated';

@Injectable()
export class ChatService {
  constructor(
    public readonly prismaService: PrismaService,
  ) {
  }

  public async findMessagesByStream(streamId: Stream['id']) {
    return this.prismaService.chatMessage.findMany({
      where: { streamId },
      orderBy: { createdAt: 'desc' },
      include: { user: true },
    });
  }

  public async sendMessage(userId: User['id'], input: SendMessageInput) {
    const { text, streamId } = input;

    const stream = await this.prismaService.stream.findUnique({
      where: { id: streamId },
    });
    if (!stream) {
      throw new NotFoundException('Стрим не найден');
    }
    if (!stream.isLive) {
      throw new BadRequestException('Стрим не запущен');
    }

    const user = await this.prismaService.user.findUnique({
      where: { id: userId },
    });
    if (!user) {
      throw new NotFoundException('Пользователь не найден');
    }

    return this.prismaService.chatMessage.create({
      data: {
        user: {
          connect: {
            id: user.id,
          },
        },
        stream: {
          connect: {
            id: stream.id,
          },
        },
        text,
      },
      include: {
        stream: true,
      },
    });
  }

  public async changeSettings(user: User, input: ChangeChatSettingsInput) {
    const { isChatEnable, isChatFollowersOnly, isChatPremiumFollowersOnly } = input;

    return this.prismaService.stream.update({
      where: { userId: user.id },
      data: { isChatEnable, isChatFollowersOnly, isChatPremiumFollowersOnly },
    });
  }
}