/* Copyright (c) Citrix Systems, Inc. 
 * 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 
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE.
 */

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


namespace XenAPI
{
    public partial class VIF : IComparable<VIF>
    {
        public const string RATE_LIMIT_QOS_VALUE = "ratelimit";
        public const string KBPS_QOS_PARAMS_KEY = "kbps";

        public string IPAddressesAsString()
        {
            var addresses = IPAddresses();
            if (addresses.Count > 0)
                return String.Join(", ", addresses.ToArray());
                
            return Messages.IP_ADDRESS_UNKNOWN;
        }

        public List<string> IPAddresses()
        {
            VM vm = Connection.Resolve(this.VM);
            if (vm != null && !vm.is_a_template)
            {
                VM_guest_metrics vmGuestMetrics = Connection.Resolve(vm.guest_metrics);

                if (vmGuestMetrics != null)
                {
                    return Helpers.FindIpAddresses(vmGuestMetrics.networks, device);
                }
            }

            return new List<string>();
        }

        public string NetworkName()
        {
            if (Connection == null) throw new NullReferenceException("NetworkName the VIF does not have connection");
            Network network = Connection.Resolve(this.network);
            if (network != null)
            {
                return network.Name();
            }
            else
            {
                return "-";
            }
        }

        public override int CompareTo(VIF other)
        {
            return device.CompareTo(other.device);
        }

        /// <summary>
        /// Tries to obtain a unique device id, re-claiming id's that have been removed.
        /// </summary>
        /// <returns></returns>
        public static int GetDeviceId(VM vm)
        {
            int i = 0;
            while (true)
            {
                bool found = false;
                foreach (XenAPI.XenRef<XenAPI.VIF> VIFRef in vm.VIFs)
                {
                    VIF TheVIF = vm.Connection.Resolve<XenAPI.VIF>(VIFRef);
                    if (TheVIF != null)
                    {
                        if (TheVIF.device == i.ToString())
                        {
                            found = true;
                            break;
                        }
                    }
                    else
                    {
                        found = true;
                    }
                }

                if (!found)
                    break;

                i++;
            }
            return i;
        }

        /// <summary>
        /// Gets the kbps of a rate limited VIF.
        /// Will return the empty string if no qos_params have been set on the VIF.
        /// </summary>
        public string LimitString()
        {
            string result = null;
            if (qos_algorithm_params != null)
            {
                if (qos_algorithm_params.ContainsKey(VIF.KBPS_QOS_PARAMS_KEY))
                    result = qos_algorithm_params[VIF.KBPS_QOS_PARAMS_KEY];
            }

            if (result == null)
                result = "";

            return result;
        }
    }
}
