/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 ARNAUD FRUGIER
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

import android.database.Cursor;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class SimpleCursorRecyclerAdapter extends CursorRecyclerAdapter<SimpleViewHolder> {

	private int mLayout;
	private int[] mFrom;
	private int[] mTo;
	private String[] mOriginalFrom;

	public SimpleCursorRecyclerAdapter (int layout, Cursor c, String[] from, int[] to) {
		super(c);
		mLayout = layout;
		mTo = to;
		mOriginalFrom = from;
		findColumns(c, from);
	}

	@Override
	public SimpleViewHolder onCreateViewHolder (ViewGroup parent, int viewType) {
		View v = LayoutInflater.from(parent.getContext())
				.inflate(mLayout, parent, false);
		return new SimpleViewHolder(v, mTo);
	}

	@Override
	public void onBindViewHolder (SimpleViewHolder holder, Cursor cursor) {
		final int count = mTo.length;
		final int[] from = mFrom;

		for (int i = 0; i < count; i++) {
			holder.views[i].setText(cursor.getString(from[i]));
		}
	}

	/**
	 * Create a map from an array of strings to an array of column-id integers in cursor c.
	 * If c is null, the array will be discarded.
	 *
	 * @param c the cursor to find the columns from
	 * @param from the Strings naming the columns of interest
	 */
	private void findColumns(Cursor c, String[] from) {
		if (c != null) {
			int i;
			int count = from.length;
			if (mFrom == null || mFrom.length != count) {
				mFrom = new int[count];
			}
			for (i = 0; i < count; i++) {
				mFrom[i] = c.getColumnIndexOrThrow(from[i]);
			}
		} else {
			mFrom = null;
		}
	}

	@Override
	public Cursor swapCursor(Cursor c) {
		findColumns(c, mOriginalFrom);
		return super.swapCursor(c);
	}
}

class SimpleViewHolder extends RecyclerView.ViewHolder
{
	public TextView[] views;

	public SimpleViewHolder (View itemView, int[] to)
	{
		super(itemView);
		views = new TextView[to.length];
		for(int i = 0 ; i < to.length ; i++) {
			views[i] = (TextView) itemView.findViewById(to[i]);
		}
	}
}