LottieSample/src/main/kotlin/com/airbnb/lottie/samples/DynamicActivity.kt

package com.airbnb.lottie.samples

import android.graphics.PointF
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import android.util.Log
import com.airbnb.lottie.LottieProperty
import com.airbnb.lottie.model.KeyPath
import com.airbnb.lottie.utils.MiscUtils
import kotlinx.android.synthetic.main.activity_dynamic.*

private val COLORS = arrayOf(
    0xff5a5f,
    0x008489,
    0xa61d55
)
private val EXTRA_JUMP = arrayOf(0f, 20f, 50f)

class DynamicActivity : AppCompatActivity() {
    private var speed = 1
    private var colorIndex = 0
    private var extraJumpIndex = 0

    companion object {
        val TAG = DynamicActivity::class.simpleName
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_dynamic)

        speedButton.setOnClickListener {
            speed = ++speed % 4
            updateButtonText()
        }

        colorButton.setOnClickListener {
            colorIndex = (colorIndex + 1) % COLORS.size
            updateButtonText()
        }

        jumpHeight.setOnClickListener {
            extraJumpIndex = (extraJumpIndex + 1) % EXTRA_JUMP.size
            updateButtonText()
        }

        animationView.addLottieOnCompositionLoadedListener { _ ->
            animationView.resolveKeyPath(KeyPath("**")).forEach {
                Log.d(TAG, it.keysToString())
            }
        }
        animationView.setFailureListener { /* do nothing */ }

        jumpHeight.postDelayed({ setupValueCallbacks() }, 1000)
        updateButtonText()

    }

    private fun setupValueCallbacks() {
        animationView.addValueCallback(KeyPath("LeftArmWave"),
            LottieProperty.TIME_REMAP) { frameInfo ->
            2 * speed.toFloat() * frameInfo.overallProgress
        }

        val shirt = KeyPath("Shirt", "Group 5", "Fill 1")
        val leftArm = KeyPath("LeftArmWave", "LeftArm", "Group 6", "Fill 1")
        val rightArm = KeyPath("RightArm", "Group 6", "Fill 1")

        animationView.addValueCallback(shirt, LottieProperty.COLOR) { COLORS[colorIndex] }
        animationView.addValueCallback(leftArm, LottieProperty.COLOR) { COLORS[colorIndex] }
        animationView.addValueCallback(rightArm, LottieProperty.COLOR) { COLORS[colorIndex] }
        val point = PointF()
        animationView.addValueCallback(KeyPath("Body"),
            LottieProperty.TRANSFORM_POSITION) { frameInfo ->
            val startX = frameInfo.startValue.x
            var startY = frameInfo.startValue.y
            var endY = frameInfo.endValue.y

            if (startY > endY) {
                startY += EXTRA_JUMP[extraJumpIndex]
            } else if (endY > startY) {
                endY += EXTRA_JUMP[extraJumpIndex]
            }
            point.set(startX, MiscUtils.lerp(startY, endY, frameInfo.interpolatedKeyframeProgress))
            point
        }
    }

    private fun updateButtonText() {
        speedButton.text = "Wave: ${speed}x Speed"
        jumpHeight.text = "Extra jump height ${EXTRA_JUMP[extraJumpIndex]}"
    }
}