/* Original work Copyright (c) Citrix Systems, Inc.
 * Modified work Copyright XCP-ng project 
 * All rights reserved. 
 * 
 * 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 
 *     copyright notice, this list of conditions and the 
 *     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 
 * 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.
 */

using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using XenAdmin.Actions;
using XenAdmin.Properties;
using XenAPI;
using XenAdmin.Dialogs;
using XenAdmin.Actions.VMActions;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Pauses the selected VMs. Shows a confirmation dialog.
    /// </summary>
    internal class PauseVMCommand : VMLifeCycleCommand
    {
        /// <summary>
        /// Initializes a new instance of this Command. The parameter-less constructor is required if 
        /// this Command is to be attached to a ToolStrip menu item or button. It should not be used in any other scenario.
        /// </summary>
        public PauseVMCommand()
        {
        }

        public PauseVMCommand(IMainWindow mainWindow, IEnumerable<SelectedItem> selection)
            : base(mainWindow, selection)
        {
        }

        public PauseVMCommand(IMainWindow mainWindow, VM vm)
            : base(mainWindow, vm)
        {
        }

        public PauseVMCommand(IMainWindow mainWindow, VM vm, Control parent)
            : base(mainWindow, vm, parent)
        {
        }

        protected override bool CanExecute(VM vm)
        {
            return vm != null && vm.allowed_operations != null && vm.allowed_operations.Contains(vm_operations.pause);
        }

        protected override void Execute(List<VM> vms)
        {
            RunAction(vms, Messages.ACTION_VM_PAUSING, Messages.ACTION_VM_PAUSING, Messages.ACTION_VM_PAUSED, null);
        }

        public override string MenuText
        {
            get
            {
                return Messages.MAINWINDOW_PAUSE;
                //return "Pause to RAM (" + ShortcutKeyDisplayString + ") ";
            }
        }

        protected override string EnabledToolTipText
        {
            get
            {
                return Messages.MAINWINDOW_TOOLBAR_PAUSEVM;
            }
        }

        public override Image MenuImage
        {
            get
            {
                return Images.StaticImages._000_paused_h32bit_16_green;
            }
        }

        public override Image ToolBarImage
        {
            get
            {
                return Images.StaticImages._000_Paused_h32bit_24_green;
            }
        }

        //removed because ERROR Duplicate access key: p
        //public override Keys ShortcutKeys
        //{
        //    get
        //    {
        //        return Keys.Control | Keys.P;
        //    }
        //}

        //removed because ERROR Duplicate access key: p
        //public override string ShortcutKeyDisplayString
        //{
        //    get
        //    {
        //        //fixme: add new message to Messages
        //        //return Messages.MAINWINDOW_CTRL_P;
        //        return "CTRL + P";
        //    }
        //}

        protected override bool ConfirmationRequired
        {
            get
            {
                return false;
            }
        }

        protected override string ConfirmationDialogText
        {
            get
            {
                SelectedItemCollection selection = GetSelection();
                if (selection.Count == 1)
                {
                    VM vm = (VM)selection[0].XenObject;
                    return vm.HAIsProtected() ? Messages.HA_CONFIRM_PAUSE_VM : Messages.CONFIRM_PAUSE_VM;
                }

                return Messages.CONFIRM_PAUSE_VMS;
            }
        }

        protected override string ConfirmationDialogTitle
        {
            get
            {
                if (GetSelection().Count == 1)
                {
                    return Messages.CONFIRM_PAUSE_VM_TITLE;
                }
                return Messages.CONFIRM_PAUSE_VMS_TITLE;
            }
        }

        protected override string ConfirmationDialogHelpId
        {
            get { return "WarningVmLifeCyclePause"; }
        }

        protected override string GetCantExecuteReasonCore(IXenObject item)
        {
            VM vm = item as VM;
            if (vm == null)
                return base.GetCantExecuteReasonCore(item);

            switch (vm.power_state)
            {
                case vm_power_state.Halted:
                    return Messages.VM_SHUT_DOWN;
                case vm_power_state.Paused:
                    return Messages.VM_PAUSED;
                case vm_power_state.Suspended:
                    return Messages.VM_SUSPENDED;
                case vm_power_state.unknown:
                    return base.GetCantExecuteReasonCore(item);
            }

            return GetCantExecuteNoToolsOrDriversReasonCore(item) ?? base.GetCantExecuteReasonCore(item);
        }

        protected override CommandErrorDialog GetErrorDialogCore(IDictionary<IXenObject, string> cantExecuteReasons)
        {
            foreach (VM vm in GetSelection().AsXenObjects<VM>())
            {
                if (!CanExecute(vm) && vm.power_state != vm_power_state.Halted)
                {
                    return new CommandErrorDialog(Messages.ERROR_DIALOG_SHUTDOWN_VM_TITLE, Messages.ERROR_DIALOG_SHUTDOWN_VMS_TITLE, cantExecuteReasons);
                }
            }
            return null;
        }

        protected override AsyncAction BuildAction(VM vm)
        {
            return new VMPause(vm);
        }
    }
}