// 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 com.cloud.deploy;

import java.util.List;
import java.util.Map;

import javax.ejb.Local;
import javax.inject.Inject;
import javax.naming.ConfigurationException;

import org.apache.log4j.Logger;

import com.cloud.capacity.CapacityManager;
import com.cloud.configuration.Config;
import com.cloud.configuration.dao.ConfigurationDao;
import com.cloud.dc.ClusterVO;
import com.cloud.dc.DataCenter;
import com.cloud.dc.Pod;
import com.cloud.dc.dao.ClusterDao;
import com.cloud.dc.dao.DataCenterDao;
import com.cloud.dc.dao.HostPodDao;
import com.cloud.exception.InsufficientServerCapacityException;
import com.cloud.host.Host;
import com.cloud.host.HostVO;
import com.cloud.host.dao.HostDao;
import com.cloud.hypervisor.Hypervisor.HypervisorType;
import com.cloud.offering.ServiceOffering;
import com.cloud.org.Cluster;
import com.cloud.resource.ResourceManager;
import com.cloud.utils.NumbersUtil;
import com.cloud.utils.component.AdapterBase;
import com.cloud.vm.VirtualMachine;
import com.cloud.vm.VirtualMachineProfile;

@Local(value=DeploymentPlanner.class)
public class BareMetalPlanner extends AdapterBase implements DeploymentPlanner {
	private static final Logger s_logger = Logger.getLogger(BareMetalPlanner.class);
	@Inject protected DataCenterDao _dcDao;
	@Inject protected HostPodDao _podDao;
	@Inject protected ClusterDao _clusterDao;
	@Inject protected HostDao _hostDao;
	@Inject protected ConfigurationDao _configDao;
	@Inject protected CapacityManager _capacityMgr;
	@Inject protected ResourceManager _resourceMgr;
	
	@Override
	public DeployDestination plan(VirtualMachineProfile<? extends VirtualMachine> vmProfile, DeploymentPlan plan, ExcludeList avoid) throws InsufficientServerCapacityException {
		VirtualMachine vm = vmProfile.getVirtualMachine();
		ServiceOffering offering = vmProfile.getServiceOffering();	
		String hostTag = null;
		
        String opFactor = _configDao.getValue(Config.CPUOverprovisioningFactor.key());
        float cpuOverprovisioningFactor = NumbersUtil.parseFloat(opFactor, 1);
        
        String haVmTag = (String)vmProfile.getParameter(VirtualMachineProfile.Param.HaTag);
        
		if (vm.getLastHostId() != null && haVmTag == null) {
			HostVO h = _hostDao.findById(vm.getLastHostId());
			DataCenter dc = _dcDao.findById(h.getDataCenterId());
			Pod pod = _podDao.findById(h.getPodId());
			Cluster c =  _clusterDao.findById(h.getClusterId());
			s_logger.debug("Start baremetal vm " + vm.getId() + " on last stayed host " + h.getId());
			return new DeployDestination(dc, pod, c, h);
		}
		
		if (haVmTag != null) {
		    hostTag = haVmTag;
		} else if (offering.getHostTag() != null) {
			String[] tags = offering.getHostTag().split(",");
			if (tags.length > 0) {
				hostTag = tags[0];
			}
		}
		
		List<ClusterVO> clusters = _clusterDao.listByDcHyType(vm.getDataCenterId(), HypervisorType.BareMetal.toString());
		int cpu_requested;
		long ram_requested;
		HostVO target = null;
		List<HostVO> hosts;
		for (ClusterVO cluster : clusters) {
			hosts = _resourceMgr.listAllUpAndEnabledHosts(Host.Type.Routing, cluster.getId(), cluster.getPodId(), cluster.getDataCenterId());
			if (hostTag != null) {
				for (HostVO h : hosts) {
					_hostDao.loadDetails(h);
					if (h.getDetail("hostTag") != null && h.getDetail("hostTag").equalsIgnoreCase(hostTag)) {
						target = h;
						break;
					}
				}
			}
		}

		if (target == null) {
			s_logger.warn("Cannot find host with tag " + hostTag + " use capacity from service offering");
			cpu_requested = offering.getCpu() * offering.getSpeed();
			ram_requested = offering.getRamSize() * 1024 * 1024;
		} else {
			cpu_requested = target.getCpus() * target.getSpeed().intValue();
			ram_requested = target.getTotalMemory();
		}
		
		for (ClusterVO cluster : clusters) {
		    if (haVmTag == null) {
		        hosts = _resourceMgr.listAllUpAndEnabledNonHAHosts(Host.Type.Routing, cluster.getId(), cluster.getPodId(), cluster.getDataCenterId());
		    } else {
		        s_logger.warn("Cannot find HA host with tag " + haVmTag + " in cluster id=" + cluster.getId() + ", pod id=" + cluster.getPodId() + ", data center id=" + cluster.getDataCenterId());
		        return null;
		    }
			for (HostVO h : hosts) {
				if (_capacityMgr.checkIfHostHasCapacity(h.getId(), cpu_requested, ram_requested, false, cpuOverprovisioningFactor, true)) {
					s_logger.debug("Find host " + h.getId() + " has enough capacity");
					DataCenter dc = _dcDao.findById(h.getDataCenterId());
					Pod pod = _podDao.findById(h.getPodId());
					return new DeployDestination(dc, pod, cluster, h);
				}
			}
		}

		s_logger.warn(String.format("Cannot find enough capacity(requested cpu=%1$s memory=%2$s)", cpu_requested, ram_requested));
		return null;
	}

	@Override
	public boolean canHandle(VirtualMachineProfile<? extends VirtualMachine> vm, DeploymentPlan plan, ExcludeList avoid) {
		return vm.getHypervisorType() == HypervisorType.BareMetal;
	}

	@Override
	public boolean configure(String name, Map<String, Object> params) throws ConfigurationException {
		return true;
	}

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

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

	@Override
	public boolean check(VirtualMachineProfile<? extends VirtualMachine> vm, DeploymentPlan plan, DeployDestination dest, ExcludeList exclude) {
		// TODO Auto-generated method stub
		return false;
	}
}