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//   http://www.apache.org/licenses/LICENSE-2.0
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// 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 01/29/2013
// Apache License, Version 2.0 (the "License"); you may not use this
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.baremetal.manager;

import java.net.InetAddress;
import java.net.URI;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

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

import org.apache.cloudstack.api.ApiConstants;

import com.cloud.agent.api.StartupCommand;
import com.cloud.agent.api.StartupRoutingCommand;
import com.cloud.baremetal.networkservice.BareMetalResourceBase;
import com.cloud.configuration.Config;
import com.cloud.dc.ClusterVO;
import com.cloud.dc.DataCenterVO;
import com.cloud.exception.DiscoveryException;
import com.cloud.host.Host;
import com.cloud.host.HostVO;
import com.cloud.hypervisor.Hypervisor;
import com.cloud.hypervisor.Hypervisor.HypervisorType;
import com.cloud.network.Network;
import com.cloud.resource.Discoverer;
import com.cloud.resource.DiscovererBase;
import com.cloud.resource.ResourceStateAdapter;
import com.cloud.resource.ServerResource;
import com.cloud.resource.UnableDeleteHostException;
import com.cloud.utils.UuidUtils;
import com.cloud.utils.exception.CloudRuntimeException;
import com.cloud.utils.script.Script;
import com.cloud.utils.script.Script2;
import com.cloud.utils.script.Script2.ParamType;
import com.cloud.vm.VMInstanceVO;
import com.cloud.vm.VirtualMachine.State;
import com.cloud.vm.dao.VMInstanceDao;

public class BareMetalDiscoverer extends DiscovererBase implements Discoverer, ResourceStateAdapter {
    @Inject
    protected VMInstanceDao _vmDao = null;

    @Override
    public boolean configure(String name, Map<String, Object> params) throws ConfigurationException {
        _resourceMgr.registerResourceStateAdapter(this.getClass().getSimpleName(), this);
        return super.configure(name, params);
    }

    @Override
    public boolean stop() {
        _resourceMgr.unregisterResourceStateAdapter(this.getClass().getSimpleName());
        return super.stop();
    }

    @Override
    public Map<? extends ServerResource, Map<String, String>> find(long dcId, Long podId, Long clusterId, URI url, String username, String password, List<String> hostTags)
            throws DiscoveryException {

        /* Enable this after we decide to use addBaremetalHostCmd instead of addHostCmd
        String discoverName = _params.get(ApiConstants.BAREMETAL_DISCOVER_NAME);
        if (!this.getClass().getName().equals(discoverName)) {
            return null;
        } */

        Map<BareMetalResourceBase, Map<String, String>> resources = new HashMap<BareMetalResourceBase, Map<String, String>>();
        Map<String, String> details = new HashMap<String, String>();

        if (!url.getScheme().equals("http")) {
            String msg = "urlString is not http so we're not taking care of the discovery for this: " + url;
            logger.debug(msg);
            return null;
        }
        if (clusterId == null) {
            String msg = "must specify cluster Id when add host";
            logger.debug(msg);
            throw new RuntimeException(msg);
        }

        if (podId == null) {
            String msg = "must specify pod Id when add host";
            logger.debug(msg);
            throw new RuntimeException(msg);
        }

        ClusterVO cluster = _clusterDao.findById(clusterId);
        if (cluster == null || (cluster.getHypervisorType() != HypervisorType.BareMetal)) {
            if (logger.isInfoEnabled())
                logger.info("invalid cluster id or cluster is not for Bare Metal hosts");
            return null;
        }

        DataCenterVO zone = _dcDao.findById(dcId);
        if (zone == null) {
            throw new RuntimeException("Cannot find zone " + dcId);
        }

        try {
            String hostname = url.getHost();
            InetAddress ia = InetAddress.getByName(hostname);
            String ipmiIp = ia.getHostAddress();
            String guid = UuidUtils.nameUUIDFromBytes(ipmiIp.getBytes()).toString();

            String injectScript = "scripts/util/ipmi.py";
            String scriptPath = Script.findScript("", injectScript);
            if (scriptPath == null) {
                throw new CloudRuntimeException("Unable to find key ipmi script "
                        + injectScript);
            }

            final Script2 command = new Script2(scriptPath, logger);
            command.add("ping");
            command.add("hostname="+ipmiIp);
            command.add("usrname="+username);
            command.add("password="+password, ParamType.PASSWORD);
            final String result = command.execute();
            if (result != null) {
                logger.warn(String.format("Can not set up ipmi connection(ip=%1$s, username=%2$s, password=%3$s, args) because %4$s", ipmiIp, username, "******", result));
                return null;
            }

            ClusterVO clu = _clusterDao.findById(clusterId);
            if (clu.getGuid() == null) {
                clu.setGuid(UUID.randomUUID().toString());
                _clusterDao.update(clusterId, clu);
            }

            Map<String, Object> params = new HashMap<String, Object>();
            params.putAll(_params);
            params.put("zone", Long.toString(dcId));
            params.put("pod", Long.toString(podId));
            params.put("cluster",  Long.toString(clusterId));
            params.put("guid", guid);
            params.put(ApiConstants.PRIVATE_IP, ipmiIp);
            params.put(ApiConstants.USERNAME, username);
            params.put(ApiConstants.PASSWORD, password);
            params.put("vmDao", _vmDao);
            params.put("configDao", _configDao);

            String resourceClassName = _configDao.getValue(Config.ExternalBaremetalResourceClassName.key());
            BareMetalResourceBase resource = null;
            if (resourceClassName != null) {
                Class<?> clazz = Class.forName(resourceClassName);
                resource = (BareMetalResourceBase) clazz.newInstance();
                String externalUrl = _configDao.getValue(Config.ExternalBaremetalSystemUrl.key());
                if (externalUrl == null) {
                    throw new IllegalArgumentException(String.format("You must specify ExternalBaremetalSystemUrl in global config page as ExternalBaremetalResourceClassName is not null"));
                }
                details.put(BaremetalManager.ExternalBaremetalSystemUrl, externalUrl);
            } else {
                resource = new BareMetalResourceBase();
            }
            resource.configure("Bare Metal Agent", params);

            String memCapacity = (String)params.get(ApiConstants.MEMORY);
            String cpuCapacity = (String)params.get(ApiConstants.CPU_SPEED);
            String cpuNum = (String)params.get(ApiConstants.CPU_NUMBER);
            String mac = (String)params.get(ApiConstants.HOST_MAC);
            if (hostTags != null && hostTags.size() != 0) {
                details.put("hostTag", hostTags.get(0));
            }
            details.put(ApiConstants.MEMORY, memCapacity);
            details.put(ApiConstants.CPU_SPEED, cpuCapacity);
            details.put(ApiConstants.CPU_NUMBER, cpuNum);
            details.put(ApiConstants.HOST_MAC, mac);
            details.put(ApiConstants.USERNAME, username);
            details.put(ApiConstants.PASSWORD, password);
            details.put(ApiConstants.PRIVATE_IP, ipmiIp);
            String vmIp = (String)params.get(ApiConstants.IP_ADDRESS);
            if (vmIp != null) {
                details.put(ApiConstants.IP_ADDRESS, vmIp);
            }
            String isEchoScAgent = _configDao.getValue(Config.EnableBaremetalSecurityGroupAgentEcho.key());
            details.put(BaremetalManager.EchoSecurityGroupAgent, isEchoScAgent);

            resources.put(resource, details);
            resource.start();

            zone.setGatewayProvider(Network.Provider.ExternalGateWay.getName());
            zone.setDnsProvider(Network.Provider.ExternalDhcpServer.getName());
            zone.setDhcpProvider(Network.Provider.ExternalDhcpServer.getName());
            _dcDao.update(zone.getId(), zone);

            logger.debug(String.format("Discover Bare Metal host successfully(ip=%1$s, username=%2$s, password=%3$s," +
                    "cpuNum=%4$s, cpuCapacity-%5$s, memCapacity=%6$s)", ipmiIp, username, "******", cpuNum, cpuCapacity, memCapacity));
            return resources;
        } catch (Exception e) {
            logger.warn("Can not set up bare metal agent", e);
        }

        return null;
    }

    @Override
    public void postDiscovery(List<HostVO> hosts, long msId)
            throws DiscoveryException {
    }

    @Override
    public boolean matchHypervisor(String hypervisor) {
        return hypervisor.equalsIgnoreCase(Hypervisor.HypervisorType.BareMetal.toString());
    }

    @Override
    public HypervisorType getHypervisorType() {
        return Hypervisor.HypervisorType.BareMetal;
    }

    @Override
    public HostVO createHostVOForConnectedAgent(HostVO host, StartupCommand[] cmd) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public HostVO createHostVOForDirectConnectAgent(HostVO host, StartupCommand[] startup, ServerResource resource, Map<String, String> details, List<String> hostTags) {
        StartupCommand firstCmd = startup[0];
        if (!(firstCmd instanceof StartupRoutingCommand)) {
            return null;
        }

        StartupRoutingCommand ssCmd = ((StartupRoutingCommand)firstCmd);
        if (ssCmd.getHypervisorType() != HypervisorType.BareMetal) {
            return null;
        }

        return _resourceMgr.fillRoutingHostVO(host, ssCmd, HypervisorType.BareMetal, details, hostTags);
    }

    @Override
    public DeleteHostAnswer deleteHost(HostVO host, boolean isForced, boolean isForceDeleteStorage) throws UnableDeleteHostException {
        if (host.getType() != Host.Type.Routing || host.getHypervisorType() != HypervisorType.BareMetal) {
            return null;
        }

        List<VMInstanceVO> deadVms = _vmDao.listByLastHostId(host.getId());
        for (VMInstanceVO vm : deadVms) {
            if (vm.getState() == State.Running || vm.getHostId() != null) {
                throw new CloudRuntimeException(String.format("VM %s is still running on host %s", vm, host));
            }
            _vmDao.remove(vm.getId());
        }

        return new DeleteHostAnswer(true);
    }

    @Override
    protected HashMap<String, Object> buildConfigParams(HostVO host) {
        HashMap<String, Object> params = super.buildConfigParams(host);
        params.put("hostId", host.getId());
        params.put("ipaddress", host.getPrivateIpAddress());
        params.put("vmDao", _vmDao);
        params.put("configDao", _configDao);
        return params;
    }

}
