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using System;
using XenAdmin.Core;
using XenAdmin.Network;
using XenAPI;


namespace XenAdmin.Actions.VMActions
{
    /// <summary>
    /// This is for the "Instant VM From Template" Command.
    /// </summary>
    public class CreateVMFastAction : AsyncAction
    {
        private readonly String _nameLabel;
        private readonly bool _markVmAsBeingCreated;

        public CreateVMFastAction(IXenConnection connection, VM template, bool markVmAsBeingCreated = true)
            : base(connection, Messages.INSTANT_VM_CREATE_TITLE, string.Format(Messages.INSTANT_VM_CREATE_DESCRIPTION, Helpers.DefaultVMName(Helpers.GetName(template), connection), Helpers.GetName(template)))
        {
            Template = template;
            _nameLabel = Helpers.DefaultVMName(Helpers.GetName(Template), Connection);
            _markVmAsBeingCreated = markVmAsBeingCreated;

            ApiMethodsToRoleCheck.AddRange(Role.CommonTaskApiList);
            ApiMethodsToRoleCheck.AddRange(Role.CommonSessionApiList);
            ApiMethodsToRoleCheck.Add("vm.clone");
            ApiMethodsToRoleCheck.Add("vm.provision");
            ApiMethodsToRoleCheck.Add("vm.start");
            ApiMethodsToRoleCheck.Add("vm.set_name_label");
        }

        protected override void Run()
        {
            RelatedTask = XenAPI.VM.async_clone(Session, Template.opaque_ref, Helpers.MakeHiddenName(_nameLabel));
            PollToCompletion(0, 80);

            string new_vm_ref = Result;

            if (_markVmAsBeingCreated)
            {
                VM = Connection.WaitForCache(new XenRef<VM>(new_vm_ref));
                VM.IsBeingCreated = true;
            }

            XenAdminConfigManager.Provider.HideObject(new_vm_ref);

            RelatedTask = XenAPI.VM.async_provision(Session, new_vm_ref);
            PollToCompletion(80, 90);

            VM.set_name_label(Session, new_vm_ref, _nameLabel);
            XenAdminConfigManager.Provider.ShowObject(new_vm_ref);

            if (_markVmAsBeingCreated)
            {
                VM.name_label = _nameLabel; //the set_name_label method takes some time, we want to show the VM right away
                VM.IsBeingCreated = false;
            }

            Result = new_vm_ref;
        }
    }
}