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 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met: 
 * 
 * *   Redistributions of source code must retain the above 
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 *     following disclaimer. 
 * *   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 
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using System.Collections.Generic;
using XenAdmin.Core;
using System.Linq;
using XenAdmin.Mappings;
using XenAPI;

namespace XenAdmin.Actions.VMActions
{
    public class VMCrossPoolMigrateAction : PureAsyncAction
    {
        private readonly VmMapping mapping;
        private readonly XenAPI.Network transferNetwork;

        public VMCrossPoolMigrateAction(VM vm, Host destinationHost, XenAPI.Network transferNetwork, VmMapping mapping)
            : base(vm.Connection, GetTitle(vm, destinationHost))
        {
            Session = vm.Connection.Session;
            Description = Messages.ACTION_PREPARING;
            VM = vm;
            Host = destinationHost;
            Pool = Helpers.GetPool(vm.Connection);
            this.mapping = mapping;
            this.transferNetwork = transferNetwork;
            
        }

        public static RbacMethodList StaticRBACDependencies
        {
            get
            {
                RbacMethodList list = new RbacMethodList( "Host.migrate_receive",
                                                          "VM.migrate_send", 
                                                          "VM.async_migrate_send",
                                                          "VM.assert_can_migrate");
                list.AddRange(Role.CommonTaskApiList);
                return list;
            }
        }
            

        private static string GetTitle(VM vm, Host toHost)
        {
            Host residentOn = vm.Connection.Resolve(vm.resident_on);
            if (residentOn == null)
            {
                return Messages.ACTION_VM_MIGRATING;
            }

            return string.Format(Messages.ACTION_VM_MIGRATING_TITLE, vm.Name, Helpers.GetName(residentOn), toHost.Name);

        }

        protected override void Run()
        {
            Description = Messages.ACTION_VM_MIGRATING;
            try
            {
                PercentComplete = 0;
                Session session = Host.Connection.DuplicateSession();
                Dictionary<string, string> sendData = Host.migrate_receive(session, Host.opaque_ref, 
                                                                           transferNetwork.opaque_ref, new Dictionary<string, string>());
                PercentComplete = 5;
                LiveMigrateOptionsVmMapping options = new LiveMigrateOptionsVmMapping(mapping, VM);

                RelatedTask = VM.async_migrate_send(Session, VM.opaque_ref, sendData, 
                                                    options.Live, options.VdiMap,
                                                    options.VifMap, options.Options);

                PollToCompletion(PercentComplete, 100);
            }
            catch (CancelledException)
            {
                Description = string.Format(Messages.ACTION_VM_MIGRATE_CANCELLED, VM.Name);
                throw;
            }
            catch (Failure ex)
            {
                Description = ex.Message;
                List<string> errors = ex.ErrorDescription;
                throw;
            }
            
            Description = Messages.ACTION_VM_MIGRATED;
        }
    }
}