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using System.Collections.Generic;
using System.Linq;
using XenAdmin.Core;
using XenAPI;


namespace XenAdmin.Actions
{
    public class AssignVMsToVMApplianceAction : PureAsyncAction
    {
        private VM_appliance _vmAppliance;
        private List<XenRef<VM>> _selectedVMs;

        public AssignVMsToVMApplianceAction(VM_appliance vmAppliance, List<XenRef<VM>> selectedVMs, bool suppressHistory)
            : base(vmAppliance.Connection, selectedVMs.Count == 1 ?
            string.Format(Messages.ASSIGN_VM_TO_VAPP, vmAppliance.Connection.Resolve(selectedVMs[0]), vmAppliance.Name)
            : string.Format(Messages.ASSIGN_VMS_TO_VAPP, vmAppliance.Name), suppressHistory)
        {
            _vmAppliance = vmAppliance;
            _selectedVMs = selectedVMs;
            Pool = Helpers.GetPool(vmAppliance.Connection);

        }

        protected override void Run()
        {
            Description = Messages.ASSIGNING_VM_APPLIANCE;
            var removedItems = _vmAppliance.VMs.Except(_selectedVMs);
            foreach (var xenRef in removedItems)
            {
                VM.set_appliance(Session, xenRef, null);
            }

            foreach (var vmRef in _selectedVMs)
            {
                var vm = _vmAppliance.Connection.Resolve(vmRef);
                if (vm != null && (vm.appliance == null || vm.appliance.opaque_ref != _vmAppliance.opaque_ref))
                    VM.set_appliance(Session, vm.opaque_ref, _vmAppliance.opaque_ref);
            }
            Description = Messages.ASSIGNED_VM_APPLIANCE;
        }
    }

    public class RemoveVMsFromVMApplianceAction : PureAsyncAction
    {
        private List<XenRef<VM>> _selectedVMs;

        public RemoveVMsFromVMApplianceAction(VM_appliance vmAppliance, List<XenRef<VM>> selectedVMs)
            : base(vmAppliance.Connection, selectedVMs.Count == 1 ?
            string.Format(Messages.REMOVE_VM_FROM_APPLIANCE, vmAppliance.Connection.Resolve(selectedVMs[0]), vmAppliance.Name)
            : string.Format(Messages.REMOVE_VMS_FROM_APPLIANCE, vmAppliance.Name))
        {
            _selectedVMs = selectedVMs;
            Pool = Helpers.GetPool(vmAppliance.Connection);

        }

        protected override void Run()
        {
            Description = Messages.REMOVING_VMS_FROM_APPLIANCE;
            foreach (var xenRef in _selectedVMs)
            {
                VM.set_appliance(Session, xenRef, null);
            }
            Description = Messages.REMOVED_VMS_FROM_APPLIANCE;
        }
    }

}