package com.reactnativeavoidsoftinput.animations

import android.animation.TimeInterpolator
import android.view.animation.LinearInterpolator
import android.view.animation.PathInterpolator

class AnimationInterpolator : TimeInterpolator {
    private val linearInterpolator = LinearInterpolator()
    private val pathInterpolator = PathInterpolator(0.42F, 0F, 1F, 1F)

    var mode = MODE.LINEAR

    override fun getInterpolation(input: Float): Float {
        return when (mode) {
            MODE.EASE_IN -> {
                pathInterpolator.getInterpolation(input)
            }
            MODE.EASE_IN_OUT -> {
                if (input < 0.5) {
                    pathInterpolator.getInterpolation(input * 2) / 2
                } else {
                    1 - pathInterpolator.getInterpolation((1 - input) * 2) / 2
                }
            }
            MODE.EASE_OUT -> {
                1 - pathInterpolator.getInterpolation(1 - input)
            }
            else -> {
                linearInterpolator.getInterpolation(input)
            }
        }
    }

    companion object {
        enum class MODE {
            EASE_IN,
            EASE_IN_OUT,
            EASE_OUT,
            LINEAR
        }
    }
}