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/*
 * Copyright 2013 serso aka se.solovyev
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * Contact details
 *
 * Email: [email protected]
 * Site:  http://se.solovyev.org
 */

package org.solovyev.android.samples.db;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import org.solovyev.android.db.*;
import org.solovyev.common.Converter;

import javax.annotation.Nonnull;
import java.util.List;

/**
 * User: serso
 * Date: 8/10/12
 * Time: 4:45 PM
 */
public class SqliteDbItemDao extends AbstractSQLiteHelper implements DbItemDao {

	public SqliteDbItemDao(@Nonnull Context context, @Nonnull SQLiteOpenHelper sqliteOpenHelper) {
		super(context, sqliteOpenHelper);
	}

	@Nonnull
	@Override
	public List loadAll() {
		return AndroidDbUtils.doDbQuery(getSqliteOpenHelper(), new LoadAll(getContext(), getSqliteOpenHelper()));
	}

	@Override
	public void insert(@Nonnull DbItem dbItem) {
		AndroidDbUtils.doDbExec(getSqliteOpenHelper(), new Insert(dbItem));
	}

	@Override
	public void removeByName(@Nonnull String name) {
		AndroidDbUtils.doDbExec(getSqliteOpenHelper(), new RemoveByName(name));
	}


	private static final class RemoveByName extends AbstractObjectDbExec {

		protected RemoveByName(@Nonnull String name) {
			super(name);
		}

		@Override
		public long exec(@Nonnull SQLiteDatabase db) {
			final String name = getNotNullObject();

			return db.delete("items", "name = ?", new String[]{name});
		}
	}

	private static final class Insert extends AbstractObjectDbExec {

		protected Insert(@Nonnull DbItem object) {
			super(object);
		}

		@Override
		public long exec(@Nonnull SQLiteDatabase db) {
			final DbItem dbItem = getNotNullObject();

			final ContentValues values = new ContentValues();
			values.put("name", dbItem.getName());
			return db.insert("items", null, values);
		}
	}

	private static final class LoadAll extends AbstractDbQuery> {

		protected LoadAll(@Nonnull Context context, @Nonnull SQLiteOpenHelper sqliteOpenHelper) {
			super(context, sqliteOpenHelper);
		}

		@Nonnull
		@Override
		public Cursor createCursor(@Nonnull SQLiteDatabase db) {
			return db.query("items", null, null, null, null, null, null);
		}

		@Nonnull
		@Override
		public List retrieveData(@Nonnull Cursor cursor) {
			return new ListMapper(DbItemMapper.getInstance()).convert(cursor);
		}
	}

	private static final class DbItemMapper implements Converter {

		@Nonnull
		private static final DbItemMapper instance = new DbItemMapper();

		private DbItemMapper() {
		}

		@Nonnull
		public static DbItemMapper getInstance() {
			return instance;
		}

		@Nonnull
		@Override
		public DbItem convert(@Nonnull Cursor cursor) {
			final String name = cursor.getString(0);
			return new DbItemImpl(name);
		}
	}
}