Otter-App-Android-Funkwhale/app/src/main/java/com/github/apognu/otter/adapters/FavoritesAdapter.kt

package com.github.apognu.otter.adapters

import android.annotation.SuppressLint
import android.content.Context
import android.graphics.Color
import android.graphics.Typeface
import android.graphics.drawable.ColorDrawable
import android.os.Build
import android.view.Gravity
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.appcompat.widget.PopupMenu
import androidx.recyclerview.widget.ItemTouchHelper
import androidx.recyclerview.widget.RecyclerView
import com.github.apognu.otter.R
import com.github.apognu.otter.fragments.FunkwhaleAdapter
import com.github.apognu.otter.utils.*
import com.squareup.picasso.Picasso
import jp.wasabeef.picasso.transformations.RoundedCornersTransformation
import kotlinx.android.synthetic.main.row_track.view.*
import java.util.*

class FavoritesAdapter(private val context: Context?, val favoriteListener: OnFavoriteListener, val fromQueue: Boolean = false) : FunkwhaleAdapter<Favorite, FavoritesAdapter.ViewHolder>() {
  interface OnFavoriteListener {
    fun onToggleFavorite(id: Int, state: Boolean)
  }

  var currentTrack: Track? = null

  override fun getItemCount() = data.size

  override fun getItemId(position: Int): Long {
    return data[position].track.id.toLong()
  }

  override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
    val view = LayoutInflater.from(context).inflate(R.layout.row_track, parent, false)

    return ViewHolder(view, context).also {
      view.setOnClickListener(it)
    }
  }

  @SuppressLint("NewApi")
  override fun onBindViewHolder(holder: ViewHolder, position: Int) {
    val favorite = data[position]

    Picasso.get()
      .load(normalizeUrl(favorite.track.album.cover.original))
      .fit()
      .placeholder(R.drawable.cover)
      .transform(RoundedCornersTransformation(16, 0))
      .into(holder.cover)

    holder.title.text = favorite.track.title
    holder.artist.text = favorite.track.artist.name

    Build.VERSION_CODES.P.onApi(
      {
        holder.title.setTypeface(holder.title.typeface, Typeface.DEFAULT.weight)
        holder.artist.setTypeface(holder.artist.typeface, Typeface.DEFAULT.weight)
      },
      {
        holder.title.setTypeface(holder.title.typeface, Typeface.NORMAL)
        holder.artist.setTypeface(holder.artist.typeface, Typeface.NORMAL)
      })


    if (favorite.track == currentTrack || favorite.track.current) {
      holder.title.setTypeface(holder.title.typeface, Typeface.BOLD)
      holder.artist.setTypeface(holder.artist.typeface, Typeface.BOLD)
    }

    context?.let {
      when (favorite.track.favorite) {
        true -> holder.favorite.setColorFilter(context.resources.getColor(R.color.colorFavorite))
        false -> holder.favorite.setColorFilter(context.resources.getColor(R.color.colorSelected))
      }

      holder.favorite.setOnClickListener {
        favoriteListener.onToggleFavorite(favorite.track.id, !favorite.track.favorite)

        data.remove(favorite)
        notifyItemRemoved(holder.adapterPosition)
      }
    }

    holder.actions.setOnClickListener {
      context?.let { context ->
        PopupMenu(context, holder.actions, Gravity.START, R.attr.actionOverflowMenuStyle, 0).apply {
          inflate(if (fromQueue) R.menu.row_queue else R.menu.row_track)

          setOnMenuItemClickListener {
            when (it.itemId) {
              R.id.track_add_to_queue -> CommandBus.send(Command.AddToQueue(listOf(favorite.track)))
              R.id.track_play_next -> CommandBus.send(Command.PlayNext(favorite.track))
              R.id.queue_remove -> CommandBus.send(Command.RemoveFromQueue(favorite.track))
            }

            true
          }

          show()
        }
      }
    }
  }

  fun onItemMove(oldPosition: Int, newPosition: Int) {
    if (oldPosition < newPosition) {
      for (i in oldPosition.rangeTo(newPosition - 1)) {
        Collections.swap(data, i, i + 1)
      }
    } else {
      for (i in newPosition.downTo(oldPosition)) {
        Collections.swap(data, i, i - 1)
      }
    }

    notifyItemMoved(oldPosition, newPosition)
    CommandBus.send(Command.MoveFromQueue(oldPosition, newPosition))
  }

  inner class ViewHolder(view: View, val context: Context?) : RecyclerView.ViewHolder(view), View.OnClickListener {
    val handle = view.handle
    val cover = view.cover
    val title = view.title
    val artist = view.artist

    val favorite = view.favorite
    val actions = view.actions

    override fun onClick(view: View?) {
      when (fromQueue) {
        true -> CommandBus.send(Command.PlayTrack(layoutPosition))
        false -> {
          data.subList(layoutPosition, data.size).plus(data.subList(0, layoutPosition)).apply {
            CommandBus.send(Command.ReplaceQueue(this.map { it.track }))

            context.toast("All tracks were added to your queue")
          }
        }
      }
    }
  }

  inner class TouchHelperCallback : ItemTouchHelper.Callback() {
    override fun isLongPressDragEnabled() = false

    override fun isItemViewSwipeEnabled() = false

    override fun getMovementFlags(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder) =
      makeMovementFlags(ItemTouchHelper.UP or ItemTouchHelper.DOWN, 0)

    override fun onMove(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, target: RecyclerView.ViewHolder): Boolean {
      onItemMove(viewHolder.adapterPosition, target.adapterPosition)

      return true
    }

    override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {}

    @SuppressLint("NewApi")
    override fun onSelectedChanged(viewHolder: RecyclerView.ViewHolder?, actionState: Int) {
      if (actionState == ItemTouchHelper.ACTION_STATE_DRAG) {
        context?.let {
          Build.VERSION_CODES.M.onApi(
            { viewHolder?.itemView?.background = ColorDrawable(context.resources.getColor(R.color.colorSelected, null)) },
            { viewHolder?.itemView?.background = ColorDrawable(context.resources.getColor(R.color.colorSelected)) })
        }
      }

      super.onSelectedChanged(viewHolder, actionState)
    }

    override fun clearView(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder) {
      viewHolder.itemView.background = ColorDrawable(Color.TRANSPARENT)

      super.clearView(recyclerView, viewHolder)
    }
  }
}