/*
 * 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;

/**
 * DR task
 *
 * @author Citrix Systems, Inc.
 */
public class DRTask extends XenAPIObject {

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

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

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

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

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

    /**
     * Represents all the fields in a DRTask
     */
    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", "introducedSRs", this.introducedSRs);
            return writer.toString();
        }

        /**
         * Convert a DR_task.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("introduced_SRs", this.introducedSRs == null ? new LinkedHashSet<SR>() : this.introducedSRs);
            return map;
        }

        /**
         * Unique identifier/object reference
         */
        public String uuid;
        /**
         * All SRs introduced by this appliance
         */
        public Set<SR> introducedSRs;
    }

    /**
     * Get a record containing the current state of the given DR_task.
     *
     * @return all fields from the object
     */
    public DRTask.Record getRecord(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "DR_task.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.toDRTaskRecord(result);
    }

    /**
     * Get a reference to the DR_task instance with the specified UUID.
     *
     * @param uuid UUID of object to return
     * @return reference to the object
     */
    public static DRTask getByUuid(Connection c, String uuid) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "DR_task.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.toDRTask(result);
    }

    /**
     * Get the uuid field of the given DR_task.
     *
     * @return value of the field
     */
    public String getUuid(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "DR_task.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 introduced_SRs field of the given DR_task.
     *
     * @return value of the field
     */
    public Set<SR> getIntroducedSRs(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "DR_task.get_introduced_SRs";
        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.toSetOfSR(result);
    }

    /**
     * Create a disaster recovery task which will query the supplied list of devices
     *
     * @param type The SR driver type of the SRs to introduce
     * @param deviceConfig The device configuration of the SRs to introduce
     * @param whitelist The devices to use for disaster recovery
     * @return Task
     */
    public static Task createAsync(Connection c, String type, Map<String, String> deviceConfig, Set<String> whitelist) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "Async.DR_task.create";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(type), Marshalling.toXMLRPC(deviceConfig), Marshalling.toXMLRPC(whitelist)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toTask(result);
    }

    /**
     * Create a disaster recovery task which will query the supplied list of devices
     *
     * @param type The SR driver type of the SRs to introduce
     * @param deviceConfig The device configuration of the SRs to introduce
     * @param whitelist The devices to use for disaster recovery
     * @return The reference to the created task
     */
    public static DRTask create(Connection c, String type, Map<String, String> deviceConfig, Set<String> whitelist) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "DR_task.create";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(type), Marshalling.toXMLRPC(deviceConfig), Marshalling.toXMLRPC(whitelist)};
        Map response = c.dispatch(method_call, method_params);
        Object result = response.get("Value");
        return Types.toDRTask(result);
    }

    /**
     * Destroy the disaster recovery task, detaching and forgetting any SRs introduced which are no longer required
     *
     * @return Task
     */
    public Task destroyAsync(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "Async.DR_task.destroy";
        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.toTask(result);
    }

    /**
     * Destroy the disaster recovery task, detaching and forgetting any SRs introduced which are no longer required
     *
     */
    public void destroy(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "DR_task.destroy";
        String session = c.getSessionReference();
        Object[] method_params = {Marshalling.toXMLRPC(session), Marshalling.toXMLRPC(this.ref)};
        Map response = c.dispatch(method_call, method_params);
        return;
    }

    /**
     * Return a list of all the DR_tasks known to the system.
     *
     * @return references to all objects
     */
    public static Set<DRTask> getAll(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "DR_task.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.toSetOfDRTask(result);
    }

    /**
     * Return a map of DR_task references to DR_task records for all DR_tasks known to the system.
     *
     * @return records of all objects
     */
    public static Map<DRTask, DRTask.Record> getAllRecords(Connection c) throws
        BadServerResponse,
        XenAPIException,
        XmlRpcException {
        String method_call = "DR_task.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.toMapOfDRTaskDRTaskRecord(result);
    }

}