import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView

class MySimpleAdapter(private val mDataSet: List<String>?) :
    RecyclerView.Adapter<MySimpleAdapter.MyViewHolder>() {

    private var clickListener: ClickListener? = null

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
        val v = LayoutInflater.from(parent.context)
            .inflate(R.layout.simple_list_item_1, parent, false)
        return MyViewHolder(v)
    }

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
        val data = mDataSet?.get(position)
        data?.let { holder.bindItems(it) }
    }

    override fun getItemCount(): Int {
        return mDataSet?.size ?: 0
    }

    fun getItem(position: Int): String? {
        //return if (mDataSet != null) mDataSet[position] else null
        return mDataSet?.get(position)
    }

    fun setOnItemClickListener(clickListener: ClickListener) {
        this.clickListener = clickListener
    }


    inner class MyViewHolder(v: View) : RecyclerView.ViewHolder(v), View.OnClickListener {

        private val text1 = v.findViewById(android.R.id.text1) as TextView

        init {
            if (clickListener != null) {
                itemView.setOnClickListener(this)
            }
        }

        fun bindItems(data: String) {
            text1.text = data
        }

        override fun onClick(v: View?) {
            if (v != null) {
                clickListener?.onItemClick(v,adapterPosition)
            }
        }

    }

    interface ClickListener {
        fun onItemClick(v: View,position: Int)
    }
}