/*
 * Copyright (c) Citrix Systems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   1) Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2) Redistributions in binary form must reproduce the above
 *      copyright notice, this list of conditions and the following
 *      disclaimer in the documentation and/or other materials
 *      provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.xensource.xenapi;

import com.xensource.xenapi.Types.BadServerResponse;
import com.xensource.xenapi.Types.VersionException;
import com.xensource.xenapi.Types.XenAPIException;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Date;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;

import org.apache.xmlrpc.XmlRpcException;

/**
 * The metrics associated with a host
 *
 * @author Citrix Systems, Inc.
 */
public class HostMetrics extends XenAPIObject {

    /**
     * The XenAPI reference (OpaqueRef) to this object.
     */
    protected final String ref;

    /**
     * For internal use only.
     */
    HostMetrics(String ref) {
        this.ref = ref;
    }

    /**
     * @return The XenAPI reference (OpaqueRef) to this object.
     */
    public String toWireString() {
        return this.ref;
    }

    /**
     * If obj is a HostMetrics, compares XenAPI references for equality.
     */
    @Override
    public boolean equals(Object obj)
    {
        if (obj != null && obj instanceof HostMetrics)
        {
            HostMetrics other = (HostMetrics)obj;
            return other.ref.equals(this.ref);
        } else
        {
            return false;
        }
    }

    @Override
    public int hashCode()
    {
        return ref.hashCode();
    }

    /**
     * Represents all the fields in a HostMetrics
     */
    public static class Record implements Types.Record {
        public String toString() {
            StringWriter writer = new StringWriter();
            PrintWriter print = new PrintWriter(writer);
            print.printf("%1$20s: %2$s\n", "uuid", this.uuid);
            print.printf("%1$20s: %2$s\n", "memoryTotal", this.memoryTotal);
            print.printf("%1$20s: %2$s\n", "memoryFree", this.memoryFree);
            print.printf("%1$20s: %2$s\n", "live", this.live);
            print.printf("%1$20s: %2$s\n", "lastUpdated", this.lastUpdated);
            print.printf("%1$20s: %2$s\n", "otherConfig", this.otherConfig);
            return writer.toString();
        }

        /**
         * Convert a host_metrics.Record to a Map
         */
        public Map<String, Object> toMap() {
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("uuid", this.uuid == null ? "" : this.uuid);
            map.put("memory_total", this.memoryTotal == null ? 0 : this.memoryTotal);
            map.put("memory_free", this.memoryFree == null ? 0 : this.memoryFree);
            map.put("live", this.live == null ? false : this.live);
            map.put("last_updated", this.lastUpdated == null ? new Date(0) : this.lastUpdated);
            map.put("other_config", this.otherConfig == null ? new HashMap<String, String>() : this.otherConfig);
            return map;
        }

        /**
         * Unique identifier/object reference
         */
        public String uuid;
        /**
         * Total host memory (bytes)
         */
        public Long memoryTotal;
        /**
         * Free host memory (bytes)
         */
        public Long memoryFree;
        /**
         * Pool master thinks this host is live
         */
        public Boolean live;
        /**
         * Time at which this information was last updated
         */
        public Date lastUpdated;
        /**
         * additional configuration
         */
        public Map<String, String> otherConfig;
    }

    /**
     * Get a record containing the current state of the given host_metrics.
     *
     * @return all fields from the object
     */
    public HostMetrics.Record getRecord(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.get_record";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toHostMetricsRecord(result);
    }

    /**
     * Get a reference to the host_metrics instance with the specified UUID.
     *
     * @param uuid UUID of object to return
     * @return reference to the object
     */
    public static HostMetrics getByUuid(Connection c, String uuid) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.get_by_uuid";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(uuid)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toHostMetrics(result);
    }

    /**
     * Get the uuid field of the given host_metrics.
     *
     * @return value of the field
     */
    public String getUuid(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.get_uuid";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toString(result);
    }

    /**
     * Get the memory/total field of the given host_metrics.
     *
     * @return value of the field
     */
    public Long getMemoryTotal(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.get_memory_total";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toLong(result);
    }

    /**
     * Get the memory/free field of the given host_metrics.
     * @deprecated
     *
     * @return value of the field
     */
    @Deprecated
    public Long getMemoryFree(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.get_memory_free";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toLong(result);
    }

    /**
     * Get the live field of the given host_metrics.
     *
     * @return value of the field
     */
    public Boolean getLive(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.get_live";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toBoolean(result);
    }

    /**
     * Get the last_updated field of the given host_metrics.
     *
     * @return value of the field
     */
    public Date getLastUpdated(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.get_last_updated";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toDate(result);
    }

    /**
     * Get the other_config field of the given host_metrics.
     *
     * @return value of the field
     */
    public Map<String, String> getOtherConfig(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.get_other_config";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toMapOfStringString(result);
    }

    /**
     * Set the other_config field of the given host_metrics.
     *
     * @param otherConfig New value to set
     */
    public void setOtherConfig(Connection c, Map<String, String> otherConfig) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.set_other_config";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref), Marshalling.toXMLRPC(otherConfig)};
        Map response = c.dispatch(method_call, method_params);
        return;
    }

    /**
     * Add the given key-value pair to the other_config field of the given host_metrics.
     *
     * @param key Key to add
     * @param value Value to add
     */
    public void addToOtherConfig(Connection c, String key, String value) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.add_to_other_config";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref), Marshalling.toXMLRPC(key), Marshalling.toXMLRPC(value)};
        Map response = c.dispatch(method_call, method_params);
        return;
    }

    /**
     * Remove the given key and its corresponding value from the other_config field of the given host_metrics.  If the key is not in that Map, then do nothing.
     *
     * @param key Key to remove
     */
    public void removeFromOtherConfig(Connection c, String key) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.remove_from_other_config";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref), Marshalling.toXMLRPC(key)};
        Map response = c.dispatch(method_call, method_params);
        return;
    }

    /**
     * Return a list of all the host_metrics instances known to the system.
     *
     * @return references to all objects
     */
    public static Set<HostMetrics> getAll(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.get_all";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toSetOfHostMetrics(result);
    }

    /**
     * Return a map of host_metrics references to host_metrics records for all host_metrics instances known to the system.
     *
     * @return records of all objects
     */
    public static Map<HostMetrics, HostMetrics.Record> getAllRecords(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "host_metrics.get_all_records";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toMapOfHostMetricsHostMetricsRecord(result);
    }

}