using Colore;
using Colore.Data;
using Colore.Effects.Keyboard;
using System;

namespace ChromaController
{
    internal class FadeKey : KeyEffect
    {
        public float StepPercentage { get; }

        /// <summary>
        /// Fades from <paramref name="color1"/> to <paramref name="color2"/> in the specified time
        /// </summary>
        /// <param name="keys">The <see cref="Colore.Effects.Keyboard.Key"/> that will have the fade effect</param>
        /// <param name="color1">The startcolor</param>
        /// <param name="color2">The endcolor</param>
        /// <param name="stepPercentage">Must be between 0 and 1. Each step, the transition will be incremented by this amount</param>
        public FadeKey(Key[] keys, Color color1, Color color2, float stepPercentage = 0.1F, int delayTime = 0) : base(keys, color1, color2, delayTime)
        {
            if (stepPercentage <= 0 || stepPercentage > 1) throw new ArgumentException("argument should be between 0 and 1", "stepPercentage");
            StepPercentage = stepPercentage;
        }

        public override bool Step(IChroma chroma)
        {
            bool baseResult = base.Step(chroma);
            if (StepCounter <= DelayTime) return baseResult;
            if ((StepPercentage * (StepCounter - DelayTime)) > 1)
            {
                chroma.Keyboard.SetKeysAsync(Keys, Color2, false);
                return true;
            }
            chroma.Keyboard.SetKeysAsync(Keys, ColorMixer(Color1, Color2, StepPercentage * (StepCounter - DelayTime)), clear: false);
            return baseResult;
        }
    }
}