import { Injectable } from '@nestjs/common';
import { InjectModel } from '@nestjs/mongoose';
import { Model, Types } from 'mongoose';
import { Like, LikeDocument } from './schemas/like.schema';

@Injectable()
export class LikesRepository {
  constructor(@InjectModel(Like.name) private readonly likeModel: Model<LikeDocument>) {}

  async findOne(userId: string, targetId: string, targetType: 'post' | 'comment'): Promise<LikeDocument | null> {
    return this.likeModel
      .findOne({
        userId: new Types.ObjectId(userId),
        targetId: new Types.ObjectId(targetId),
        targetType,
      })
      .exec();
  }

  async create(userId: string, targetId: string, targetType: 'post' | 'comment'): Promise<LikeDocument> {
    return this.likeModel.create({
      userId: new Types.ObjectId(userId),
      targetId: new Types.ObjectId(targetId),
      targetType,
    });
  }

  async deleteById(id: string): Promise<void> {
    await this.likeModel.findByIdAndDelete(id).exec();
  }
}