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 *     following disclaimer. 
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using System;
using System.Collections.Generic;
using XenAdmin.Core;
using XenAPI;
using XenAdmin.Network;

namespace XenAdmin.Actions.VMActions
{
    public class ResumeAndStartVMsAction : AsyncAction
    {
        private readonly List<VM> VmsToResume;
        private readonly List<VM> VmsToStart;

        private int ActionCountTotal;
        private int ActionCountCompleted;
        private Action<VMStartAbstractAction, Failure> _startDiagnosisForm;
        private Action<VM, bool> _warningDialogHAInvalidConfig;

        public ResumeAndStartVMsAction(IXenConnection connection, Host host, List<VM> vmsToResume, List<VM> vmsToStart,Action<VM, bool> warningDialogHAInvalidConfig, Action<VMStartAbstractAction, Failure> startDiagnosisForm)
            : base(connection, "Preparing to resume and start VMs...", true)
        {
            Host = host;
            VmsToResume = vmsToResume;
            VmsToStart = vmsToStart;
            _warningDialogHAInvalidConfig = warningDialogHAInvalidConfig;
            _startDiagnosisForm = startDiagnosisForm;

            #region RBAC Dependencies
            ApiMethodsToRoleCheck.AddRange(Role.CommonSessionApiList);
            ApiMethodsToRoleCheck.AddRange(Role.CommonTaskApiList);

            if (vmsToResume.Count > 0)
                ApiMethodsToRoleCheck.Add("vm.resume_on");
            if (vmsToStart.Count > 0)
                ApiMethodsToRoleCheck.Add("vm.start_on");
            #endregion
        }

        protected override void Run()
        {
            ActionCountCompleted = 0;
            ActionCountTotal = VmsToResume.Count + VmsToStart.Count;

            foreach (VM vm in VmsToResume)
            {
                Description = string.Format("Resuming VM {0} of {1}", ActionCountCompleted, VmsToResume.Count);

                AsyncAction action;
                if (CanVMBootOnHost(vm, Host))
                    action = new VMResumeOnAction(vm, Host, _warningDialogHAInvalidConfig, _startDiagnosisForm);
                else
                    action = new VMResumeAction(vm, _warningDialogHAInvalidConfig, _startDiagnosisForm);

                action.Changed += action_Changed;
                action.RunExternal(Session);
                ActionCountCompleted++;
            }

            foreach (VM vm in VmsToStart)
            {
                Description = string.Format("Starting VM {0} of {1}", ActionCountCompleted - VmsToResume.Count, VmsToStart.Count);

                AsyncAction action;
                if (CanVMBootOnHost(vm, Host))
                    action = new VMStartOnAction(vm, Host, _warningDialogHAInvalidConfig, _startDiagnosisForm);
                else
                    action = new VMStartAction(vm, _warningDialogHAInvalidConfig, _startDiagnosisForm);

                action.Changed += action_Changed;
                action.RunExternal(Session);
                ActionCountCompleted++;
            }
        }

        private bool CanVMBootOnHost(VM vm, Host host)
        {
            try
            {
                VM.assert_can_boot_here(Connection.Session, vm.opaque_ref, host.opaque_ref);
                return true;
            }
            catch
            {
                return false;
            }
        }

        void action_Changed(object sender, EventArgs e)
        {
            ActionBase a = (ActionBase) sender;

            PercentComplete = ((ActionCountCompleted * 100) + a.PercentComplete) / ActionCountTotal;
        }
    }
}