// Copyright 2012 Citrix Systems, Inc. Licensed under the
// Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License.  Citrix Systems, Inc.
// reserves all rights not expressly granted by 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.
// 
// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.upgrade.dao;

import java.io.File;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.apache.log4j.Logger;

import com.cloud.utils.exception.CloudRuntimeException;
import com.cloud.utils.script.Script;

public class Upgrade2212to2213 implements DbUpgrade {
    final static Logger s_logger = Logger.getLogger(Upgrade2212to2213.class);

    @Override
    public String[] getUpgradableVersionRange() {
        return new String[] { "2.2.12", "2.2.13"};
    }

    @Override
    public String getUpgradedVersion() {
        return "2.2.13";
    }

    @Override
    public boolean supportsRollingUpgrade() {
        return true;
    }

    @Override
    public File[] getPrepareScripts() {
        String script = Script.findScript("", "db/schema-2212to2213.sql");
        if (script == null) {
            throw new CloudRuntimeException("Unable to find db/schema-2212to2213.sql");
        }
        
        return new File[] { new File(script) };
    }

    @Override
    public void performDataMigration(Connection conn) {
        fixForeignKeys(conn);
    }

    @Override
    public File[] getCleanupScripts() {
        return null;
    }
 

    private void fixForeignKeys(Connection conn) {
        HashMap<String, List<String>> foreignKeys = new HashMap<String, List<String>>();
        List<String> keys = new ArrayList<String>();
        keys.add("fk_networks__data_center_id");
        foreignKeys.put("networks", keys);

        // drop all foreign keys
        s_logger.debug("Dropping old key fk_networks__data_center_id...");
        for (String tableName : foreignKeys.keySet()) {
            DbUpgradeUtils.dropKeysIfExist(conn, tableName, foreignKeys.get(tableName), true);
        }

        try {
            PreparedStatement pstmt = conn.prepareStatement("ALTER TABLE `cloud`.`networks` ADD CONSTRAINT `fk_networks__data_center_id` FOREIGN KEY (`data_center_id`) REFERENCES `data_center`(`id`) ON DELETE CASCADE");
            pstmt.executeUpdate();
        } catch (SQLException e) {
            throw new CloudRuntimeException("Unable to reinsert data center key for the network", e);
        }
        
        
        // drop primary keys
        DbUpgradeUtils.dropPrimaryKeyIfExists(conn, "cloud_usage.usage_load_balancer_policy");
        DbUpgradeUtils.dropPrimaryKeyIfExists(conn, "cloud_usage.usage_port_forwarding");
        
        //Drop usage_network_offering unique key
        try {
            PreparedStatement pstmt = conn.prepareStatement("drop index network_offering_id on cloud_usage.usage_network_offering");
            pstmt.executeUpdate();
            s_logger.debug("Dropped usage_network_offering unique key");
        } catch (Exception e) {
            // Ignore error if the usage_network_offering table or the unique key doesn't exist
        }
    }
}