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

namespace IStation.Server
{
    /// <summary>
    /// 自定义实时重复任务辅助类
    /// </summary>
    public class CustomRealRepeatJobHelper
    {
        private IScheduler _sched;//调度器

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

        /// <summary>
        /// 开始任务
        /// </summary>
        public async Task StartJob(Model.CustomRealJob instance)
        {
            if (_sched != null)
                return;
            this.Instance = instance ?? throw new ArgumentNullException();
            var jobName = CustomRealRepeatJobNameHelper.GetJobName(instance);
            var jobGroupName = CustomRealRepeatJobNameHelper.GetJobGroupName(instance);
            var triggerName = CustomRealRepeatJobNameHelper.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<CustomRealRepeatJob>()
             .WithIdentity(jobName, jobGroupName)
             .UsingJobData("JobID", instance.ID)
             .Build();

            //4.创建Trigger
            var trigger = TriggerBuilder.Create()
            .WithIdentity(triggerName, jobGroupName)
            .WithSimpleSchedule(x => x.WithIntervalInMinutes(instance.Repeat)
            .RepeatForever().WithMisfireHandlingInstructionNextWithRemainingCount())
            .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 = CustomRealRepeatJobNameHelper.GetJobGroupName(this.Instance);
            var triggerName = CustomRealRepeatJobNameHelper.GetTriggerName(this.Instance);
            var triggerKey = new TriggerKey(triggerName, jobGroupName);
            if (await _sched.CheckExists(triggerKey))
            {
                await _sched.UnscheduleJob(triggerKey);
            }
            await CustomRealRepeatJob.CancelJob(this.Instance.ID);
        }


    }

}