package fr.gouv.etalab.mastodon.drawers;
/* Copyright 2018 Thomas Schneider
 *
 * This file is a part of Mastalab
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * Mastalab is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with Mastalab; if not,
 * see <http://www.gnu.org/licenses>. */


import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.RecyclerView;
import android.view.View;

import fr.gouv.etalab.mastodon.R;
import fr.gouv.etalab.mastodon.client.Entities.Status;
import fr.gouv.etalab.mastodon.helper.Helper;

/**
 * Created by Thomas on 08/09/2018.
 * Adapter for thread decoration
 */
public class ConversationDecoration extends RecyclerView.ItemDecoration{

    private Drawable divider;
    private Context context;
    private int statusOpenedPosition;

    public ConversationDecoration(Context context, int statusOpenedPosition){
        divider = ContextCompat.getDrawable(context,R.drawable.line_divider);
        this.statusOpenedPosition = statusOpenedPosition;
        this.context = context;
    }

    @Override
    public void onDraw(Canvas canvas, RecyclerView parent, RecyclerView.State state) {
        canvas.save();
        int left = parent.getPaddingLeft();
        int right = parent.getWidth() - parent.getPaddingRight();
        int childCount = parent.getChildCount();
        int top = 0, bottom = 0;
        StatusListAdapter adapter = (StatusListAdapter) parent.getAdapter();
        int offSet = (int) Helper.convertDpToPixel(50, context);
        for (int i = 0; i < childCount; i++) {
            View child = parent.getChildAt(i);
            int position = parent.getChildAdapterPosition(child);
            Status status = adapter.getItem(position);
            if( status != null){
                Status statusBefore = null;
                if( position > 0)
                    statusBefore = adapter.getItem(position - 1);
                top = (statusBefore != null && statusBefore.getId().equals(status.getIn_reply_to_id()))?
                        child.getBottom(): (child.getTop() + offSet);
                Status statusAfter = null;
                if( adapter.getItemCount() > position+1)
                    statusAfter = adapter.getItem(position + 1);
                bottom =  (statusAfter != null && status.getId().equals(statusAfter.getIn_reply_to_id()) && position != statusOpenedPosition)?
                    child.getTop():child.getTop()+offSet;


            }
            divider.setBounds(left, top, right, bottom);
            divider.draw(canvas);
        }
        canvas.restore();
    }

}