package com.designingknights.unboundradiogroup;

import android.app.Activity;
import android.support.annotation.NonNull;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RadioButton;

/**
 * Created by Timothy Winters on 5/23/2018.
 */
public class UnboundRadioGroup implements RadioButton.OnClickListener
{
    private ViewGroup viewGroup;
    private String groupTag;
    private int lastChecked = -1;
    private Activity activity;

    private OnClickListener clickListener;

    /**
     * Instantiates a new Custom radio group.
     *
     * @param activity    the activity
     * @param viewGroupID the view group id
     */
    public UnboundRadioGroup(@NonNull Activity activity, int viewGroupID)
    {
        this.activity = activity;
        this.viewGroup = (ViewGroup) activity.findViewById(viewGroupID);
        init();
    }

    /**
     * Instantiates a new Custom radio group.
     *
     * @param activity  the activity
     * @param viewGroup the view group
     */
    public UnboundRadioGroup(@NonNull Activity activity, ViewGroup viewGroup)
    {
        this.activity = activity;
        this.viewGroup = viewGroup;
        init();
    }

    private void init()
    {
        clickListener = null;
       // buildGroup(viewGroup);
    }

    /**
     * Create group by tag.
     *
     * @param groupTag the group tag
     */
    public void createGroupByTag(String groupTag)
    {
        this.groupTag = groupTag;
        buildGroup(viewGroup);
    }
    private void buildGroup(@NonNull ViewGroup viewGroup)
    {
        int count = viewGroup.getChildCount();
        for (int i = 0; i < count; i++)
        {
            View view = viewGroup.getChildAt(i);
            if (view instanceof ViewGroup)
            {
                buildGroup((ViewGroup) view);
            }
            else if (view instanceof RadioButton)
            {
                RadioButton radioButton = (RadioButton) view;
                if (radioButton.getTag().equals(groupTag))
                {
                    radioButton.setOnClickListener(this);
                }
            }
        }
    }

    /**
     * Add.
     *
     * @param radioButton the radio button
     */
    public void add(@NonNull RadioButton radioButton)
    {
        radioButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v)
    {

        int checked = v.getId();
        if (checked != lastChecked)
        {
            ((RadioButton) v).setChecked(true);
            if (clickListener != null) clickListener.OnClick((RadioButton) v);
            if (lastChecked != -1)
            {
                ((RadioButton) activity.findViewById(lastChecked)).setChecked(false);
            }
            lastChecked = checked;
        }
    }

    /**
     * Sets on click listener.
     *
     * @param clickListener the click listener
     */
    public void setOnClickListener(OnClickListener clickListener)
    {
        this.clickListener = clickListener;
    }


    /**
     * The interface On click listener.
     */
    public interface OnClickListener
    {
        /**
         * On click.
         *
         * @param radioButton the radio button
         */
        public void OnClick(RadioButton radioButton);
    }
}