using Quartz;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace IStation.Server
{
    /// <summary>
    /// 自定义计划任务辅助类
    /// </summary>
    public class CustomCronJobHelper
    {
        private IScheduler _sched;//调度器

        /// <summary>
        /// 实例
        /// </summary>
        public Model.CustomCronJob Instance { get; private set; }

        /// <summary>
        /// 开始任务
        /// </summary>
        public async Task StartJob(Model.CustomCronJob instance)
        {
            if (_sched != null)
                return;
            this.Instance = instance ?? throw new ArgumentNullException();
            var jobName = CustomCronJobNameHelper.GetJobName(instance);
            var jobGroupName = CustomCronJobNameHelper.GetJobGroupName(instance);
            var triggerName = CustomCronJobNameHelper.GetTriggerName(instance);

            // 1.创建scheduler的引用
            var fac = new Quartz.Impl.StdSchedulerFactory();
            _sched = await fac.GetScheduler();

            //2.启动 scheduler
            await _sched.Start();

            //3.创建任务
            var job = JobBuilder.Create<CustomCronJob>()
             .WithIdentity(jobName, jobGroupName)
             .Build();
            job.JobDataMap.Put(CustomRealJob.Instance, instance);

            //4.创建Trigger
            var trigger = TriggerBuilder.Create()
             .WithIdentity(triggerName, jobGroupName)
             .WithCronSchedule(instance.Expression)
             .Build();

            //5.加入调度管理器
            await _sched.ScheduleJob(job, trigger);
        }

        /// <summary>
        /// 取消任务
        /// </summary>
        public async Task CancelJob()
        {
            if (_sched == null)
                return;
            var jobGroupName = CustomCronJobNameHelper.GetJobGroupName(this.Instance);
            var triggerName = CustomCronJobNameHelper.GetTriggerName(this.Instance);
            var triggerKey = new TriggerKey(triggerName, jobGroupName);
            if (await _sched.CheckExists(triggerKey))
            {
                await _sched.UnscheduleJob(triggerKey);
            }
        }

    }
}