// 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.network.dao;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

import javax.ejb.Local;

import org.apache.log4j.Logger;

import com.cloud.network.LoadBalancerVO;
import com.cloud.network.rules.FirewallRule.State;
import com.cloud.utils.component.ComponentLocator;
import com.cloud.utils.db.GenericDaoBase;
import com.cloud.utils.db.SearchBuilder;
import com.cloud.utils.db.SearchCriteria;
import com.cloud.utils.db.SearchCriteria.Op;
import com.cloud.utils.db.Transaction;

@Local(value = { LoadBalancerDao.class })
public class LoadBalancerDaoImpl extends GenericDaoBase<LoadBalancerVO, Long> implements LoadBalancerDao {
    private static final Logger s_logger = Logger.getLogger(LoadBalancerDaoImpl.class);
    private static final String LIST_INSTANCES_BY_LOAD_BALANCER = "SELECT vm.id " +
            "    FROM vm_instance vm, load_balancer lb, ip_forwarding fwd, user_ip_address ip " +
            "    WHERE lb.id = ? AND " +
            "          fwd.group_id = lb.id AND " +
            "          fwd.forwarding = 0 AND " +
            "          fwd.private_ip_address = vm.private_ip_address AND " +
            "          lb.ip_address = ip.public_ip_address AND " +
            "          ip.data_center_id = vm.data_center_id ";
    private final SearchBuilder<LoadBalancerVO> ListByIp;
    private final SearchBuilder<LoadBalancerVO> IpAndPublicPortSearch;
    private final SearchBuilder<LoadBalancerVO> AccountAndNameSearch;
    protected final SearchBuilder<LoadBalancerVO> TransitionStateSearch;

    protected final FirewallRulesCidrsDaoImpl _portForwardingRulesCidrsDao = ComponentLocator.inject(FirewallRulesCidrsDaoImpl.class);

    protected LoadBalancerDaoImpl() {
        ListByIp = createSearchBuilder();
        ListByIp.and("ipAddressId", ListByIp.entity().getSourceIpAddressId(), SearchCriteria.Op.EQ);
        ListByIp.and("networkId", ListByIp.entity().getNetworkId(), SearchCriteria.Op.EQ);
        ListByIp.done();

        IpAndPublicPortSearch = createSearchBuilder();
        IpAndPublicPortSearch.and("ipAddressId", IpAndPublicPortSearch.entity().getSourceIpAddressId(), SearchCriteria.Op.EQ);
        IpAndPublicPortSearch.and("publicPort", IpAndPublicPortSearch.entity().getSourcePortStart(), SearchCriteria.Op.EQ);
        IpAndPublicPortSearch.done();

        AccountAndNameSearch = createSearchBuilder();
        AccountAndNameSearch.and("accountId", AccountAndNameSearch.entity().getAccountId(), SearchCriteria.Op.EQ);
        AccountAndNameSearch.and("name", AccountAndNameSearch.entity().getName(), SearchCriteria.Op.EQ);
        AccountAndNameSearch.done();

        TransitionStateSearch = createSearchBuilder();
        TransitionStateSearch.and("networkId", TransitionStateSearch.entity().getNetworkId(), Op.EQ);
        TransitionStateSearch.and("state", TransitionStateSearch.entity().getState(), Op.IN);
        TransitionStateSearch.done();
    }

    @Override
    public List<Long> listInstancesByLoadBalancer(long loadBalancerId) {
        Transaction txn = Transaction.currentTxn();
        String sql = LIST_INSTANCES_BY_LOAD_BALANCER;
        PreparedStatement pstmt = null;
        List<Long> instanceList = new ArrayList<Long>();
        try {
            pstmt = txn.prepareAutoCloseStatement(sql);
            pstmt.setLong(1, loadBalancerId);

            ResultSet rs = pstmt.executeQuery();
            while (rs.next()) {
                Long vmId = rs.getLong(1);
                instanceList.add(vmId);
            }
        } catch (Exception ex) {
            s_logger.error("error getting recent usage network stats", ex);
        }
        return instanceList;
    }

    @Override
    public List<LoadBalancerVO> listByIpAddress(long ipAddressId) {
        SearchCriteria<LoadBalancerVO> sc = ListByIp.create();
        sc.setParameters("ipAddressId", ipAddressId);
        return listBy(sc);
    }

    @Override
    public List<LoadBalancerVO> listByNetworkId(long networkId) {
        SearchCriteria<LoadBalancerVO> sc = ListByIp.create();
        sc.setParameters("networkId", networkId);
        return listBy(sc);
    }

    @Override
    public LoadBalancerVO findByIpAddressAndPublicPort(long ipAddressId, String publicPort) {
        SearchCriteria<LoadBalancerVO> sc = IpAndPublicPortSearch.create();
        sc.setParameters("ipAddressId", ipAddressId);
        sc.setParameters("publicPort", publicPort);
        return findOneBy(sc);
    }

    @Override
    public LoadBalancerVO findByAccountAndName(Long accountId, String name) {
        SearchCriteria<LoadBalancerVO> sc = AccountAndNameSearch.create();
        sc.setParameters("accountId", accountId);
        sc.setParameters("name", name);
        return findOneBy(sc);
    }

    @Override
    public List<LoadBalancerVO> listInTransitionStateByNetworkId(long networkId) {
        SearchCriteria<LoadBalancerVO> sc = TransitionStateSearch.create();
        sc.setParameters("networkId", networkId);
        sc.setParameters("state", State.Add.toString(), State.Revoke.toString());
        return listBy(sc);
    }

}