using UnityEngine;
using System.Collections;
using System;

public class TimeRecovery : MonoBehaviour
{
    /// <summary>
    /// 
    /// </summary>
    private bool onCountDown = false;
    /// <summary>
    /// 
    /// </summary>
    private string countDownTitle = "Start";

    /// <summary>
    /// 
    /// </summary>
    public int totalSeconds = 60;

    /// <summary>
    /// 
    /// </summary>
    private int _leftSeconds=0;

    /// <summary>
    /// 
    /// </summary>
    private Action<int> callBack;

    /// <summary>
    /// 
    /// </summary>
    public int leaveSeconds
    {
        get
        {
            return _leftSeconds;
        }
        set
        {
            if (_leftSeconds != value)
            {
                _leftSeconds = value;

                if (callBack != null)
                {
                    callBack(_leftSeconds);
                }

                if (leaveSeconds <= 0)
                {
                    StopTimer();
                } 
            }
        }
    }

    /// <summary>
    /// 
    /// </summary>
    /// <returns></returns>
    IEnumerator DoCountDown()
    {
        while (leaveSeconds > 0)
        {
            yield return new WaitForSeconds(1f);
            leaveSeconds--;             
        }      
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="totalTs"></param>
    public void StartTimer(int totalTs, Action<int> leftTsChangeCallBack)
    {
        StopTimer();

        totalSeconds = totalTs;
        leaveSeconds = totalTs;
        callBack = leftTsChangeCallBack;

        onCountDown = true;
        StartCoroutine(DoCountDown());
    }

    /// <summary>
    /// 
    /// </summary>
    public void StopTimer()
    {
        onCountDown = false;
        StopAllCoroutines();
    }
}