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

/// <summary>
/// 战斗模块计时器
/// </summary>
public class Timer
{
    private DateTime mStart = DateTime.MinValue;    // 上一次调度时间
    private DateTime mNext = DateTime.MaxValue;     // 下一次调度时间
    private long mInterval = 0;                     // 调度间隔时间,单位毫秒
    private int mTotalTimes = 0;                    // 总调度次数, -1无限次
    private int mCurrentTimes = 0;                  // 当前已调度时间
    
    /// <summary>
    /// 初始化
    /// </summary>
    /// <param name="interval">调度间隔时间,单位毫秒</param>
    /// <param name="times">总调度次数, -1代表无限制</param>
    /// <param name="first">第一次调度间隔时间,单位毫秒</param>
    public void Initialize(long interval, long first, int times = -1)
    {
        mInterval = interval;
        mTotalTimes = times;
        mCurrentTimes = 0;

        mStart = DateTime.Now;
        mNext = mStart.AddMilliseconds(first);
    }

    /// <summary>
    /// 检测计时器是否达到触发时间,如符合则认为本次触发
    /// </summary>
    /// <returns></returns>
    public bool IsActive()
    {
        if (this.IsStop() == true)
            return false;

        TimeSpan span = DateTime.Now - mNext;
        if (span.TotalMilliseconds >= 0)
        {
            ++mCurrentTimes;
            mStart = DateTime.Now;
            mNext = mStart.AddMilliseconds(mInterval);
            return true;
        }
        return false;
    }

    /// <summary>
    /// 计时器是否已停止
    /// </summary>
    /// <returns></returns>
    public bool IsStop()
    {
        // 无限制次数永不停止
        if (mTotalTimes == -1)
            return false;

        if (mTotalTimes != -1 && mCurrentTimes > mTotalTimes)
            return true;

        return false;
    }
}