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// 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
//
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// 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 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.
//
// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.baremetal.networkservice;

import java.util.HashMap;
import java.util.Map;

import javax.naming.ConfigurationException;

import org.apache.log4j.Logger;

import com.trilead.ssh2.SCPClient;

import com.cloud.agent.api.Answer;
import com.cloud.agent.api.Command;
import com.cloud.agent.api.HostVmStateReportEntry;
import com.cloud.agent.api.PingCommand;
import com.cloud.agent.api.PingRoutingCommand;
import com.cloud.agent.api.routing.DhcpEntryCommand;
import com.cloud.utils.script.Script;
import com.cloud.utils.ssh.SSHCmdHelper;

public class BaremetalDnsmasqResource extends BaremetalDhcpResourceBase {
    private static final Logger s_logger = Logger.getLogger(BaremetalDnsmasqResource.class);

    @Override
    public boolean configure(String name, Map<String, Object> params) throws ConfigurationException {
        com.trilead.ssh2.Connection sshConnection = null;
        try {
            super.configure(name, params);
            s_logger.debug(String.format("Trying to connect to DHCP server(IP=%1$s, username=%2$s, password=%3$s)", _ip, _username, _password));
            sshConnection = SSHCmdHelper.acquireAuthorizedConnection(_ip, _username, _password);
            if (sshConnection == null) {
                throw new ConfigurationException(String.format("Cannot connect to DHCP server(IP=%1$s, username=%2$s, password=%3$s", _ip, _username, _password));
            }

            if (!SSHCmdHelper.sshExecuteCmd(sshConnection, "[ -f '/usr/sbin/dnsmasq' ]")) {
                throw new ConfigurationException("Cannot find dnsmasq at /usr/sbin/dnsmasq on " + _ip);
            }

            SCPClient scp = new SCPClient(sshConnection);

            String editHosts = "scripts/network/exdhcp/dnsmasq_edithosts.sh";
            String editHostsPath = Script.findScript("", editHosts);
            if (editHostsPath == null) {
                throw new ConfigurationException("Can not find script dnsmasq_edithosts.sh at " + editHosts);
            }
            scp.put(editHostsPath, "/usr/bin/", "0755");

            String prepareDnsmasq = "scripts/network/exdhcp/prepare_dnsmasq.sh";
            String prepareDnsmasqPath = Script.findScript("", prepareDnsmasq);
            if (prepareDnsmasqPath == null) {
                throw new ConfigurationException("Can not find script prepare_dnsmasq.sh at " + prepareDnsmasq);
            }
            scp.put(prepareDnsmasqPath, "/usr/bin/", "0755");

            /*
            String prepareCmd = String.format("sh /usr/bin/prepare_dnsmasq.sh %1$s %2$s %3$s", _gateway, _dns, _ip);
            if (!SSHCmdHelper.sshExecuteCmd(sshConnection, prepareCmd)) {
                throw new ConfigurationException("prepare dnsmasq at " + _ip + " failed");
            }
            */

            s_logger.debug("Dnsmasq resource configure successfully");
            return true;
        } catch (Exception e) {
            s_logger.debug("Dnsmasq resorce configure failed", e);
            throw new ConfigurationException(e.getMessage());
        } finally {
            SSHCmdHelper.releaseSshConnection(sshConnection);
        }
    }

    @Override
    public PingCommand getCurrentStatus(long id) {
        com.trilead.ssh2.Connection sshConnection = SSHCmdHelper.acquireAuthorizedConnection(_ip, _username, _password);
        if (sshConnection == null) {
            return null;
        } else {
            SSHCmdHelper.releaseSshConnection(sshConnection);
            return new PingRoutingCommand(getType(), id, new HashMap<String, HostVmStateReportEntry>());
        }
    }

    Answer execute(DhcpEntryCommand cmd) {
        com.trilead.ssh2.Connection sshConnection = null;
        try {
            sshConnection = SSHCmdHelper.acquireAuthorizedConnection(_ip, _username, _password);
            if (sshConnection == null) {
                return new Answer(cmd, false, "ssh authenticate failed");
            }
            String addDhcp = String.format("/usr/bin/dnsmasq_edithosts.sh %1$s %2$s %3$s", cmd.getVmMac(), cmd.getVmIpAddress(), cmd.getVmName());
            if (!SSHCmdHelper.sshExecuteCmd(sshConnection, addDhcp)) {
                return new Answer(cmd, false, "add Dhcp entry failed");
            } else {
                return new Answer(cmd);
            }
        } finally {
            SSHCmdHelper.releaseSshConnection(sshConnection);
        }
    }

    @Override
    public Answer executeRequest(Command cmd) {
        if (cmd instanceof DhcpEntryCommand) {
            return execute((DhcpEntryCommand)cmd);
        } else {
            return super.executeRequest(cmd);
        }
    }
}