/// <summary>
/// MIT License - Copyright(c) 2019 Ugo Belfiore
/// </summary>

using UnityEngine;

namespace PerspectiveSwitcher
{
    public static class ExtAnimationCurve
    {
        public enum EaseType
        {
            LINEAR,
            EASE_IN_OUT,
        }

        /// <summary>
        /// return a color from a string
        /// </summary>
        public static float GetMaxValue(this AnimationCurve animationCurve, ref int index)
        {
            if (animationCurve.length == 0)
            {
                Debug.LogWarning("no keys");
                index = -1;
                return (0);
            }

            index = 0;
            float maxValue = animationCurve[0].value;
            for (int i = 1; i < animationCurve.length; i++)
            {
                if (animationCurve[i].value > maxValue)
                {
                    maxValue = animationCurve[i].value;
                    index = i;
                }
            }
            return (maxValue);
        }

        /// <summary>
        /// return a color from a string
        /// </summary>
        public static float GetMinValue(this AnimationCurve animationCurve, ref int index)
        {
            if (animationCurve.length == 0)
            {
                Debug.LogWarning("no keys");
                index = -1;
                return (0);
            }

            index = 0;
            float minValue = animationCurve[0].value;
            for (int i = 1; i < animationCurve.length; i++)
            {
                if (animationCurve[i].value < minValue)
                {
                    minValue = animationCurve[i].value;
                    index = i;
                }
            }
            return (minValue);
        }

        public static AnimationCurve GetDefaultCurve(EaseType easeType = EaseType.LINEAR)
        {
            switch (easeType)
            {
                case EaseType.LINEAR:
                    AnimationCurve curveLinear = AnimationCurve.Linear(0, 0, 1, 1);// new AnimationCurve(new Keyframe(0, 0), new Keyframe(1, 1));
                                                                                   //curveLinear.postWrapMode = WrapMode.Clamp;
                    return (curveLinear);
                case EaseType.EASE_IN_OUT:
                    AnimationCurve curveEased = AnimationCurve.EaseInOut(0, 0, 1, 1);
                    return (curveEased);
            }
            return (new AnimationCurve());
        }
    }
}