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

namespace IStation.Model.Monitor
{
    /// <summary>
    /// 日段
    /// </summary>
    public class DaySlot : JsonModel<DaySlot>, ICronSlot
    {
        /// <summary>
        /// 是否从前一天开始
        /// </summary>
        public bool Pre { get; set; } = false;

        /// <summary>
        /// 开始小时 0-23
        /// </summary>
        public int Start { get; set; } = 0;

        /// <summary>
        /// 结束小时 1-24
        /// </summary>
        public int End { get; set; } = 24;

        /// <summary>
        /// 验证
        /// </summary>
        public bool Verify()
        {
            if (this.Start < 0 || this.Start > 23)
                return false;
            if (this.End < 1 || this.End > 24)
                return false;
            var start = this.Start;
            var end = this.End;
            if (this.Pre)
            {
                end += 24;
            }
            if (end - start > 24)
                return false;
            if (end - start <= 0)
                return false;
            return true;
        }

        /// <summary>
        /// 获取开始时间
        /// </summary>
        public DateTime GetStartTime(DateTime rhs)
        {
            var start = 0;
            if (Verify())
            {
                start = this.Start;
                if (Pre)
                    start = start - 24;
            }
            var dt = rhs.AddDays(-1).Date;
            dt = dt.AddHours(start);
            return dt;
        }

        /// <summary>
        /// 获取结束时间
        /// </summary>
        public DateTime GetEndTime(DateTime rhs)
        {
            var end = 24;
            if (Verify())
                end = this.End;
            var dt = rhs.AddDays(-1).Date;
            dt = dt.AddHours(end);
            return dt;
        }

    }
}