namespace Common.Helpers;

/// <summary>
/// A <see cref="System.Timers.Timer"/> that recurrs after a given interval. 
/// The callback is non-reentrant, unline a standard <see cref="System.Timers.Timer"/>.
/// </summary>
public class RecurringTimer : IDisposable
{
    private readonly System.Timers.Timer _timer;

    /// <summary>
    /// Instanciates the recurring timer, with the <paramref name="intervalMs"/> given.
    /// </summary>
    /// <param name="intervalMs">interval to act on callback, in milliseconds</param>
    /// <param name="callbackAction">action to perform when the timer elapses</param>
    public RecurringTimer(int intervalMs, Action callbackAction)
    {
        _timer = new System.Timers.Timer()
        {
            AutoReset = false,
            Interval = intervalMs
        };

        _timer.Elapsed += delegate
        {
            callbackAction();  // perform callback action
            _timer.Start(); // manual restart after action finished
        };
    }

    /// <summary>
    /// Starts the timing by setting <see cref='System.Timers.Timer.Enabled'/> to <see langword='true'/>.
    /// </summary>
    public void Start()
    {
        _timer.Start();
    }

    /// <summary>
    /// Stops the timing by setting <see cref='System.Timers.Timer.Enabled'/> to <see langword='false'/>.
    /// </summary>
    public void Stop()
    {
        _timer.Stop();
    }

    public void Dispose()
    {
        _timer?.Dispose();
    }
}