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

/*
 * Copyright (c) 2020 Hemanth Savarla.
 *
 * Licensed under the GNU General Public License v3
 *
 * This is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 */
package code.name.monkey.retromusic.adapter.song

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.annotation.LayoutRes
import androidx.fragment.app.FragmentActivity
import code.name.monkey.retromusic.R
import code.name.monkey.retromusic.helper.MusicPlayerRemote
import code.name.monkey.retromusic.interfaces.ICabHolder
import code.name.monkey.retromusic.model.Song

abstract class AbsOffsetSongAdapter(
    activity: FragmentActivity,
    dataSet: MutableList<Song>,
    @LayoutRes itemLayoutRes: Int,
    ICabHolder: ICabHolder?
) : SongAdapter(activity, dataSet, itemLayoutRes, ICabHolder) {

    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
    }

    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[layoutPosition - 1]

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

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

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