package com.applicaster.oasisplayer.chromecast

import android.app.MediaRouteButton
import android.content.Context
import android.view.Gravity
import android.view.View
import android.view.ViewGroup
import android.view.ViewTreeObserver
import android.widget.LinearLayout
import com.applicaster.oasisplayer.R
import de.prosiebensat1digital.oasisplayer.player_api.OasisPlayer

class CastButtonInjector{

    fun inject(context: Context, oasisPlayer: OasisPlayer, completion: (MediaRouteButton) -> Unit?) {
        oasisPlayer.defaultUi?.viewTreeObserver?.addOnGlobalLayoutListener(
                object : ViewTreeObserver.OnGlobalLayoutListener {
                    override fun onGlobalLayout() {
                        val viewGroup = getViewGroupForInjection(oasisPlayer)
                        if (viewGroup != null) {
                            val mediaRouteButton = createMediaRouteButton(context)
                            if (mediaRouteButton != null) {
                                val params = createMediaButtonLayoutParams()
                                viewGroup.addView(mediaRouteButton, 0, params)
                                completion.invoke(mediaRouteButton)
                                oasisPlayer.defaultUi?.viewTreeObserver?.removeOnGlobalLayoutListener(
                                    this
                                )
                            }
                        }
                    }
                }
        )
    }

    private fun getViewGroupForInjection(oasisPlayer: OasisPlayer): ViewGroup? {
        val view = getOasisLogoView(oasisPlayer)
        return view?.parent as? ViewGroup
    }

    private fun getOasisLogoView(oasisPlayer: OasisPlayer) =
            oasisPlayer.defaultUi?.findViewById<View>(R.id.logo)

    @Suppress("UNNECESSARY_SAFE_CALL") //handling for potential issue on HMS devices
    private fun createMediaRouteButton(context: Context): android.app.MediaRouteButton? {
        val mediaRouteButton = MediaRouteButton(context)
        mediaRouteButton?.visibility = View.GONE
        mediaRouteButton?.setPadding(0, 0, 0, 0)
        return mediaRouteButton
    }

    private fun createMediaButtonLayoutParams(): LinearLayout.LayoutParams {
        val params = LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT,
                LinearLayout.LayoutParams.WRAP_CONTENT
        )
        params.gravity = Gravity.CENTER
        return params
    }
}