namespace ACBuildService;

public static class Time
{
    public const long OneDay = 86400000;
    public const long Hour = 3600000;
    public const long Minute = 60000;

    private static TimeInfo _timeInfo = new TimeInfo();

    public static long Now => _timeInfo.Now();

    public static long NowSeconds => Now / 1000;

    public static DateTime DateTimeNow => DateTime.Now;

    public static long FrameTime => _timeInfo.FrameTime;

    public static event Action OnUpdate;
    public static event Action OnLateUpdate;

    internal static void Awake()
    {
    }

    internal static void Update()
    {
        _timeInfo.Update();
        OnUpdate?.Invoke();
    }

    internal static void LateUpdate()
    {
        OnLateUpdate?.Invoke();
    }
}

public class TimeInfo
{
    private int timeZone;

    public int TimeZone
    {
        get => timeZone;
        set
        {
            timeZone = value;
            dt = dt1970.AddHours(TimeZone);
        }
    }

    private readonly DateTime dt1970;
    private DateTime dt;

    public long FrameTime;

    public TimeInfo()
    {
        dt1970 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
        dt = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
        FrameTime = Now();
    }

    public void Update()
    {
        FrameTime = Now();
    }

    /// <summary> 
    /// 根据时间戳获取时间 
    /// </summary>  
    public DateTime ToDateTime(long timeStamp)
    {
        return dt.AddTicks(timeStamp * 10000);
    }

    // 线程安全
    public long Now()
    {
        return (DateTime.UtcNow.Ticks - dt1970.Ticks) / 10000;
    }


    public long Transition(DateTime d)
    {
        return (d.Ticks - dt.Ticks) / 10000;
    }
}