using System;
using System.Collections.Generic;

namespace jive
{
  public class IntervalTimer : Timer
  {
    readonly ITimerFactory factory;
    readonly IDictionary<TimerClient, System.Timers.Timer> timers;

    public IntervalTimer() : this(new TimerFactory())
    {
    }

    public IntervalTimer(ITimerFactory factory)
    {
      this.factory = factory;
      timers = new Dictionary<TimerClient, System.Timers.Timer>();
    }

    public void start_notifying(TimerClient client_to_be_notified, TimeSpan span)
    {
      stop_notifying(client_to_be_notified);

      var timer = factory.create_for(span);
      timer.Elapsed += (o, e) =>
      {
        client_to_be_notified.notify();
      };
      timer.Start();
      timers[client_to_be_notified] = timer;
    }

    public void stop_notifying(TimerClient client_to_stop_notifying)
    {
      if (!timers.ContainsKey(client_to_stop_notifying)) return;
      timers[client_to_stop_notifying].Stop();
      timers[client_to_stop_notifying].Dispose();
    }

    public void Dispose()
    {
      timers.each(x => x.Value.Dispose());
      timers.Clear();
    }
  }
}