petmaster/api/src/messages/messages.service.ts

import { Injectable, NotFoundException } from '@nestjs/common';
import { PrismaService } from '../prisma/prisma.service';
import { SendMessageDto } from './dto/message.dto';

@Injectable()
export class MessagesService {
  constructor(private prisma: PrismaService) {}

  async getConversation(clientId: string, staffId: string) {
    await this.prisma.client.findUniqueOrThrow({ where: { id: clientId } });

    return this.prisma.message.findMany({
      where: {
        clientId,
      },
      orderBy: { createdAt: 'asc' },
    });
  }

  async getUnreadCount(clientId: string, staffId: string) {
    const count = await this.prisma.message.count({
      where: {
        clientId,
        readAt: null,
      },
    });
    return { unreadCount: count };
  }

  async markAsRead(clientId: string, messageIds: string[]) {
    await this.prisma.client.findUniqueOrThrow({ where: { id: clientId } });

    return this.prisma.message.updateMany({
      where: {
        id: { in: messageIds },
        clientId,
      },
      data: { readAt: new Date() },
    });
  }
}