import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';

import { LessThan, Repository } from 'typeorm';

import { paginate } from '~/helper/paginate';

import { TaskLogQueryDto } from '../dto/log.dto';
import { TaskLogEntity } from '../entities/task-log.entity';

@Injectable()
export class TaskLogService {
  constructor(
    @InjectRepository(TaskLogEntity)
    private taskLogRepository: Repository<TaskLogEntity>
  ) {}

  async create(tid: number, status: number, time?: number, err?: string): Promise<number> {
    const result = await this.taskLogRepository.save({
      status,
      detail: err,
      time,
      task: { id: tid }
    });
    return result.id;
  }

  async list({ page, pageSize }: TaskLogQueryDto) {
    const queryBuilder = await this.taskLogRepository
      .createQueryBuilder('task_log')
      .leftJoinAndSelect('task_log.task', 'task')
      .orderBy('task_log.id', 'DESC');

    return paginate<TaskLogEntity>(queryBuilder, {
      page,
      pageSize
    });
  }

  async clearLog(): Promise<void> {
    await this.taskLogRepository.clear();
  }

  async clearLogBeforeTime(time: Date): Promise<void> {
    await this.taskLogRepository.delete({ createdAt: LessThan(time) });
  }
}