class TodoListAdapter :
    ListAdapter<ToDoModel, TodoListAdapter.ToDoViewHolder>(ToDoListComparator()) {
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ToDoViewHolder {
        return ToDoViewHolder.create(parent)
    }

    override fun onBindViewHolder(holder: ToDoViewHolder, position: Int) {
        holder.bind(getItem(position))
    }

    class ToDoViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        private val titleItem: TextView = itemView.findViewById(R.id.title_txt)
        private val descriptionItem: TextView = itemView.findViewById(R.id.description_txt)
        private val priorityCircle: View = itemView.findViewById(R.id.priority_indicator)
        private val priorityItem: CardView = itemView.findViewById(R.id.priority_card)

        fun bind(toDoModel: ToDoModel) {
            titleItem.text = toDoModel.title
            descriptionItem.text = toDoModel.description
            descriptionItem.setTextColor(ContextCompat.getColor(itemView.context, R.color.red))
            val color = ContextCompat.getColor(itemView.context, R.color.red)
            Log.d("LOH", "bind: $color")
            //priorityCircle.setBackgroundColor(ContextCompat.getColor(itemView.context, R.color.red))

            when (toDoModel.priority) {
                Priority.High -> priorityItem.backgroundTintList = ColorStateList.valueOf(color)
                Priority.Medium -> priorityItem.setCardBackgroundColor(
                    ContextCompat.getColor(
                        itemView.context,
                        R.color.yellow
                    )
                )
                else -> priorityItem.setCardBackgroundColor(
                    ContextCompat.getColor(
                        itemView.context,
                        R.color.green
                    )
                )
            }

            when (toDoModel.priority) {
                Priority.High -> priorityCircle.backgroundTintList = ColorStateList.valueOf(color)
                Priority.Medium -> priorityCircle.backgroundTintList =
                    ColorStateList.valueOf(ContextCompat.getColor(itemView.context, R.color.yellow))
                else -> priorityCircle.setBackgroundColor(
                    ContextCompat.getColor(
                        itemView.context,
                        R.color.green
                    )
                )
            }
        }

        companion object {
            fun create(parent: ViewGroup): ToDoViewHolder {
                val view = LayoutInflater.from(parent.context)
                    .inflate(R.layout.row_layout, parent, false)
                return ToDoViewHolder(view)
            }
        }
    }
}

class ToDoListComparator : DiffUtil.ItemCallback<ToDoModel>() {
    override fun areItemsTheSame(oldItem: ToDoModel, newItem: ToDoModel): Boolean {
        return oldItem == newItem
    }

    override fun areContentsTheSame(oldItem: ToDoModel, newItem: ToDoModel): Boolean {
        return oldItem.title == newItem.title
    }
}