/**
 *  Copyright (C) 2010 Cloud.com, Inc.  All rights reserved.
 * 
 * This software is licensed under the GNU General Public License v3 or later.
 * 
 * It is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */


package com.cloud.network.guru;

import java.net.URI;

import javax.ejb.Local;

import org.apache.log4j.Logger;

import com.cloud.dc.DataCenter;
import com.cloud.dc.DataCenter.NetworkType;
import com.cloud.dc.Pod;
import com.cloud.dc.Vlan;
import com.cloud.dc.Vlan.VlanType;
import com.cloud.dc.dao.DataCenterDao;
import com.cloud.dc.dao.VlanDao;
import com.cloud.deploy.DeployDestination;
import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientAddressCapacityException;
import com.cloud.exception.InsufficientVirtualNetworkCapcityException;
import com.cloud.network.Network;
import com.cloud.network.NetworkManager;
import com.cloud.network.Networks.AddressFormat;
import com.cloud.network.Networks.BroadcastDomainType;
import com.cloud.network.Networks.TrafficType;
import com.cloud.network.addr.PublicIp;
import com.cloud.network.dao.IPAddressDao;
import com.cloud.offering.NetworkOffering;
import com.cloud.offerings.dao.NetworkOfferingDao;
import com.cloud.utils.component.Inject;
import com.cloud.vm.Nic.ReservationStrategy;
import com.cloud.vm.NicProfile;
import com.cloud.vm.ReservationContext;
import com.cloud.vm.VirtualMachine;
import com.cloud.vm.VirtualMachineProfile;

@Local(value=NetworkGuru.class)
public class DirectPodBasedNetworkGuru extends DirectNetworkGuru{
private static final Logger s_logger = Logger.getLogger(DirectPodBasedNetworkGuru.class);
    
    @Inject DataCenterDao _dcDao;
    @Inject VlanDao _vlanDao;
    @Inject NetworkManager _networkMgr;
    @Inject IPAddressDao _ipAddressDao;
    @Inject NetworkOfferingDao _networkOfferingDao;
    

    @Override
    protected boolean canHandle(NetworkOffering offering, DataCenter dc) {
        //this guru handles system Direct pod based network
        if (dc.getNetworkType() == NetworkType.Basic && offering.getTrafficType() == TrafficType.Guest && offering.isSystemOnly()) {
            return true;
        } else {
            s_logger.trace("We only take care of Guest Direct Pod based networks");
            return false;
        }
    }
    
    @Override
    public NicProfile allocate(Network network, NicProfile nic, VirtualMachineProfile<? extends VirtualMachine> vm) throws InsufficientVirtualNetworkCapcityException,
            InsufficientAddressCapacityException, ConcurrentOperationException {
        
        DataCenter dc = _dcDao.findById(network.getDataCenterId());
        NetworkOffering offering = _networkOfferingDao.findByIdIncludingRemoved(network.getNetworkOfferingId());
        
        if (!canHandle(offering, dc)) {
            return null;
        }
       
        if (nic == null) {
            nic = new NicProfile(ReservationStrategy.Start, null, null, null, null);
        } else {
            nic.setStrategy(ReservationStrategy.Start);
        }

        return nic;
    }
    
    @Override
    public void reserve(NicProfile nic, Network network, VirtualMachineProfile<? extends VirtualMachine> vm, DeployDestination dest, ReservationContext context) throws InsufficientVirtualNetworkCapcityException, InsufficientAddressCapacityException, ConcurrentOperationException {
        if (nic.getIp4Address() == null) {
            getIp(nic, dest.getPod(), vm, network);
        } 
    }
    
    protected void getIp(NicProfile nic, Pod pod, VirtualMachineProfile<? extends VirtualMachine> vm, Network network) throws InsufficientVirtualNetworkCapcityException, InsufficientAddressCapacityException, ConcurrentOperationException {
        DataCenter dc = _dcDao.findById(pod.getDataCenterId());
        if (nic.getIp4Address() == null) {     
            PublicIp ip = _networkMgr.assignPublicIpAddress(dc.getId(), pod.getId(), vm.getOwner(), VlanType.DirectAttached, network.getId());
            nic.setIp4Address(ip.getAddress().toString());
            nic.setGateway(ip.getGateway());
            nic.setNetmask(ip.getNetmask());
            if(ip.getVlanTag() != null && ip.getVlanTag().equalsIgnoreCase(Vlan.UNTAGGED)) {
                nic.setIsolationUri(URI.create("ec2://" + Vlan.UNTAGGED));
                nic.setBroadcastUri(URI.create("vlan://" + Vlan.UNTAGGED));
                nic.setBroadcastType(BroadcastDomainType.Native);
            }
            nic.setFormat(AddressFormat.Ip4);
            nic.setReservationId(String.valueOf(ip.getVlanTag()));
            nic.setMacAddress(ip.getMacAddress());
        }
        nic.setDns1(dc.getDns1());
        nic.setDns2(dc.getDns2());
    }

}