#pragma once

#include <cstdint>

namespace extra2d {

enum class TweenEasing : uint8_t {
    Linear,
    QuadIn,
    QuadOut,
    QuadInOut,
    CubicIn,
    CubicOut,
    CubicInOut,
    QuartIn,
    QuartOut,
    QuartInOut,
    QuintIn,
    QuintOut,
    QuintInOut,
    SineIn,
    SineOut,
    SineInOut,
    ExpoIn,
    ExpoOut,
    ExpoInOut,
    CircIn,
    CircOut,
    CircInOut,
    ElasticIn,
    ElasticOut,
    ElasticInOut,
    BackIn,
    BackOut,
    BackInOut,
    BounceIn,
    BounceOut,
    BounceInOut,
    Smooth,
    Fade,
};

class EasingFunctions {
public:
    using EasingFunc = float (*)(float);

    static float apply(float t, TweenEasing easing);
    static EasingFunc get(TweenEasing easing);

    static float linear(float t);
    static float quadIn(float t);
    static float quadOut(float t);
    static float quadInOut(float t);
    static float cubicIn(float t);
    static float cubicOut(float t);
    static float cubicInOut(float t);
    static float quartIn(float t);
    static float quartOut(float t);
    static float quartInOut(float t);
    static float quintIn(float t);
    static float quintOut(float t);
    static float quintInOut(float t);
    static float sineIn(float t);
    static float sineOut(float t);
    static float sineInOut(float t);
    static float expoIn(float t);
    static float expoOut(float t);
    static float expoInOut(float t);
    static float circIn(float t);
    static float circOut(float t);
    static float circInOut(float t);
    static float elasticIn(float t);
    static float elasticOut(float t);
    static float elasticInOut(float t);
    static float backIn(float t);
    static float backOut(float t);
    static float backInOut(float t);
    static float bounceIn(float t);
    static float bounceOut(float t);
    static float bounceInOut(float t);
    static float smooth(float t);
    static float fade(float t);

private:
    static constexpr float PI = 3.14159265358979323846f;
    static constexpr float HALF_PI = 1.57079632679489661923f;
    static constexpr float BACK_CONST = 1.70158f;
    static constexpr float ELASTIC_CONST = 2.0f * PI / 3.0f;
};

} // namespace extra2d