PlayerAndroid/app/src/main/java/code/name/monkey/retromusic/adapter/song/AbsOffsetSongAdapter.kt

package code.name.monkey.retromusic.adapter.song

import android.view.*
import androidx.annotation.LayoutRes
import androidx.appcompat.app.AppCompatActivity
import code.name.monkey.retromusic.R
import code.name.monkey.retromusic.helper.MusicPlayerRemote
import code.name.monkey.retromusic.interfaces.CabHolder
import code.name.monkey.retromusic.model.Song
import java.util.*

abstract class AbsOffsetSongAdapter : SongAdapter {

	constructor(
			activity: AppCompatActivity,
			dataSet: ArrayList<Song>, @LayoutRes itemLayoutRes: Int,
			usePalette: Boolean,
			cabHolder: CabHolder?
	) : super(activity, dataSet, itemLayoutRes, usePalette, cabHolder)

	constructor(
			activity: AppCompatActivity,
			dataSet: ArrayList<Song>, @LayoutRes itemLayoutRes: Int,
			usePalette: Boolean,
			cabHolder: CabHolder?,
			showSectionName: Boolean
	) : super(activity, dataSet, itemLayoutRes, usePalette, cabHolder, showSectionName) {
	}

	override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): SongAdapter.ViewHolder {
		if (viewType == OFFSET_ITEM) {
			val view = LayoutInflater.from(activity)
				.inflate(R.layout.item_list_quick_actions, parent, false)
			return createViewHolder(view)
		}
		return super.onCreateViewHolder(parent, viewType)
	}

	override fun createViewHolder(view: View): SongAdapter.ViewHolder {
		return ViewHolder(view)
	}

	override fun getItemId(position: Int): Long {
		var positionFinal = position
		positionFinal--
		return if (positionFinal < 0) -2 else super.getItemId(positionFinal)
	}

	override fun getIdentifier(position: Int): Song? {
		var positionFinal = position
		positionFinal--
		return if (positionFinal < 0) null else super.getIdentifier(positionFinal)
	}

	override fun getItemCount(): Int {
		val superItemCount = super.getItemCount()
		return if (superItemCount == 0) 0 else superItemCount + 1
	}

	override fun getItemViewType(position: Int): Int {
		return if (position == 0) OFFSET_ITEM else SONG
	}

	override fun getSectionName(position: Int): String {
		var positionF = position
		positionF--
		return if (positionF < 0) "" else super.getSectionName(positionF)
	}

	open inner class ViewHolder(itemView: View) : SongAdapter.ViewHolder(itemView) {

		override // could also return null, just to be safe return empty song
		val song: Song
			get() = if (itemViewType == OFFSET_ITEM) Song.emptySong else dataSet[adapterPosition - 1]

		override fun onClick(v: View?) {
			if (isInQuickSelectMode && itemViewType != OFFSET_ITEM) {
				toggleChecked(adapterPosition)
			} else {
				MusicPlayerRemote.openQueue(dataSet, adapterPosition - 1, true)
			}
		}

		override fun onLongClick(v: View?): Boolean {
			if (itemViewType == OFFSET_ITEM) return false
			toggleChecked(adapterPosition)
			return true
		}
	}

	companion object {
		const val OFFSET_ITEM = 0
		const val SONG = 1
	}
}