using System;
using System.Collections.Generic;

namespace Cryville.Crtr {
	public abstract class StateBase<T> {
		public int EventId;
		public double Time;
		public Chart chart;
		public List<T> events;

		bool breakflag = false;
		
		public StateBase(Chart c, List<T> evs) {
			chart = c;
			events = evs;
			EventId = 0;
			Time = 0;
		}

		public virtual StateBase<T> Clone() {
			return (StateBase<T>)MemberwiseClone();
		}

		public virtual void CopyTo(StateBase<T> dest) {
			dest.EventId = EventId;
			dest.Time = Time;
			dest.breakflag = breakflag;
		}

		public virtual void Break() {
			breakflag = true;
		}

		public void Forward() {
			ForwardToTime(double.PositiveInfinity);
		}

		public void ForwardByTime(double time) {
			ForwardToTime(Time + time);
		}

		public void ForwardOnceByTime(double time) {
			ForwardOnceToTime(Time + time);
		}

		public void ForwardToTime(double toTime) {
			breakflag = false;
			ForwardOnceToTime(Time);
			while (Time < toTime) {
				ForwardOnceToTime(toTime);
				if (breakflag) break;
			}
		}

		public void ForwardStepByTime(double time, double step) {
			ForwardStepToTime(Time + time, step);
		}

		public void ForwardStepToTime(double toTime, double step) {
			breakflag = false;
			ForwardOnceToTime(Time);
			while (Time < toTime) {
				double next = Time + step;
				ForwardOnceToTime(next < toTime ? next : toTime);
				if (breakflag) break;
			}
		}
		
		public abstract void ForwardOnceToTime(double toTime);
	}
}