/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

package org.apache.tuscany.nosqldatastore.hbase;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.tuscany.nosqldatastore.Database;
import org.apache.tuscany.nosqldatastore.Group;

import java.io.IOException;

public class HBaseDatatabase implements Database{
    
    private HTable table;
    private HBaseAdmin admin;

    HBaseDatatabase(String dbname, HBaseAdmin admin){
        Configuration conf = HBaseConfiguration.create();
        try {
            try{
                HTableDescriptor descriptor = new HTableDescriptor(dbname);
                admin.createTable(descriptor);
            } catch (MasterNotRunningException e) {
                e.printStackTrace();
            } catch (ZooKeeperConnectionException e) {
                e.printStackTrace();
            } catch (TableExistsException e){
                System.out.println("connected to existing database....");
            } finally {
                table = new HTable(conf,dbname);
                System.out.println(new String(table.getTableName()));
                this.admin = admin;
                table.flushCommits();
            }
        }catch (IOException ex) {
            ex.printStackTrace();
        }

    }

    public Group createGroup(String groupId) {

        HColumnDescriptor cf= new HColumnDescriptor(groupId.getBytes());

        try {
            admin.disableTable(table.getTableName());
            admin.addColumn(table.getTableName(),cf);
            admin.enableTable(table.getTableName());
        } catch (IOException e) {
            System.out.println("Error: Creating the group "+groupId);
            e.printStackTrace();
        }

        Group group = new HBaseGroup(table, groupId);
        return group;
    }

    public Group getGroup(String groupId) {
        Group group = new HBaseGroup(table, groupId);
        return group;
    }

    public void deleteGroup(String groupId) {
        try {
            admin.disableTable(table.getTableName());
            admin.deleteColumn(table.getTableName(),groupId.getBytes());
            admin.enableTable(table.getTableName());
        } catch (IOException e) {
            System.out.println("Error: Deleting the group "+groupId);
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        }
    }
}