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 * *   Redistributions of source code must retain the above 
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 *     following disclaimer. 
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using System.Collections.Generic;
using XenAdmin;
using XenAdmin.Network.StorageLink;
using System;
using System.Collections.ObjectModel;

namespace XenAPI
{
    public class StorageLinkPool : StorageLinkObject<StorageLinkPool>
    {
        private uint _capacity;
        private uint _usedSpace;

        public string StorageLinkSystemId { get; private set; }
        public string ParentStorageLinkPoolId { get; private set; }
        public StorageLinkEnums.RaidType RaidTypes { get; private set; }
        public StorageLinkEnums.ProvisioningType ProvisioningTypes { get; private set; }

        public StorageLinkPool()
        {
        }

        public StorageLinkPool(StorageLinkConnection storageLinkConnection, string opaque_ref, string friendlyName, string parentStorageLinkPoolId, string storageLinkSystemId, uint capacity, uint usedSpace, StorageLinkEnums.RaidType raidTypes, StorageLinkEnums.ProvisioningType provisioningTypes)
            : base(storageLinkConnection, opaque_ref, friendlyName)
        {
            Util.ThrowIfParameterNull(parentStorageLinkPoolId, "parentStorageLinkPoolId");
            Util.ThrowIfParameterNull(storageLinkSystemId, "storageLinkSystemId");

            ParentStorageLinkPoolId = parentStorageLinkPoolId;
            StorageLinkSystemId = storageLinkSystemId;
            _capacity = capacity;
            _usedSpace = usedSpace;
            RaidTypes = raidTypes;
            ProvisioningTypes = provisioningTypes;
        }

        public StorageLinkPool Parent
        {
            get
            {
                return StorageLinkConnection.Cache.Resolve<StorageLinkPool>(ParentStorageLinkPoolId);
            }
        }

        public List<StorageLinkPool> GetAncestors()
        {
            var output = new List<StorageLinkPool>();

            StorageLinkPool pool = Parent;

            while (pool != null)
            {
                output.Add(pool);
                pool = pool.Parent;
            }
            return output;
        }

        public uint Capacity
        {
            get
            {
                return _capacity;
            }
            private set
            {
                if (_capacity != value)
                {
                    _capacity = value;
                    NotifyPropertyChanged("Capacity");
                    NotifyPropertyChanged("FreeSpace");
                }
            }
        }

        public uint UsedSpace
        {
            get
            {
                return _usedSpace;
            }
            private set
            {
                if (_usedSpace != value)
                {
                    _usedSpace = value;
                    NotifyPropertyChanged("UsedSpace");
                    NotifyPropertyChanged("FreeSpace");
                }
            }
        }

        public uint FreeSpace
        {
            get
            {
                return Math.Max(0, _capacity - _usedSpace);
            }
        }

        public string StorageLinkPoolPath
        {
            get
            {
                var pathList = new List<string> { ToString() };
                pathList.AddRange(GetAncestors().ConvertAll(p => p.ToString()));
                pathList.Reverse();
                return string.Join(" > ", pathList.ToArray());
            }
        }

        public override void UpdateFrom(StorageLinkPool update)
        {
            base.UpdateFrom(update);
            Capacity = update.Capacity;
            UsedSpace = update.UsedSpace;
        }

        public StorageLinkSystem StorageLinkSystem
        {
            get
            {
                return StorageLinkConnection.Cache.Resolve<StorageLinkSystem>(StorageLinkSystemId);
            }
        }
    }
}