using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Aiwaz.Common.Animations
{
    abstract public class ValueAnimation : Animation
    {
        public float StartValue { get; set; }
        public float EndValue { get; set; }

        public Func<float> ValueGetter;
        public Action<float> ValueSetter;
        public Func<string> ValueNamer;

        public float Value
        {
            get { return ValueGetter(); }
            set { ValueSetter(value); }
        }

        public ValueAnimation()
            : base()
        {
            AnimationName = "Erroneous (Value)";
        }

        public override void Animate(double time, uint userData)
        {
            if (time < StartTime || time > EndTime)
                return;

            double Time = (time - StartTime) / (EndTime - StartTime);
            Value = Calculate(Time);
        }

        protected abstract float Calculate(double NormalizedTime);
    }
}