package com.looker.droidify.widget

import androidx.recyclerview.widget.RecyclerView

abstract class StableRecyclerAdapter<VT : Enum<VT>, VH : RecyclerView.ViewHolder> :
    EnumRecyclerAdapter<VT, VH>() {
    private var nextId = 1L
    private val descriptorToId = mutableMapOf<String, Long>()

    init {
        super.setHasStableIds(true)
    }

    final override fun setHasStableIds(hasStableIds: Boolean) {
        throw UnsupportedOperationException()
    }

    override fun getItemId(position: Int): Long {
        val descriptor = getItemDescriptor(position)
        return descriptorToId[descriptor] ?: run {
            val id = nextId++
            descriptorToId[descriptor] = id
            id
        }
    }

    abstract fun getItemDescriptor(position: Int): String
}