package com.looker.droidify.widget

import android.util.SparseArray
import android.view.ViewGroup
import androidx.recyclerview.widget.RecyclerView

abstract class EnumRecyclerAdapter<VT : Enum<VT>, VH : RecyclerView.ViewHolder> :
    RecyclerView.Adapter<VH>() {
    abstract val viewTypeClass: Class<VT>

    private val names = SparseArray<String>()

    private fun getViewType(viewType: Int): VT {
        return java.lang.Enum.valueOf(viewTypeClass, names.get(viewType))
    }

    final override fun getItemViewType(position: Int): Int {
        val enum = getItemEnumViewType(position)
        names.put(enum.ordinal, enum.name)
        return enum.ordinal
    }

    final override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): VH {
        return onCreateViewHolder(parent, getViewType(viewType))
    }

    abstract fun getItemEnumViewType(position: Int): VT
    abstract fun onCreateViewHolder(parent: ViewGroup, viewType: VT): VH
}