using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;

namespace DTS.Common.Classes.ClockSync
{
    /// <summary>
    /// this converter is used for displaying StreamingFilterCollection/array in property grids
    /// </summary>    
    public class ClockSyncProfileConverter : ArrayConverter
    {
        private ClockSyncProfileCollection _collection = null;
        private static readonly object MyLock = new object();
        private ClockSyncProfile[] _values = null;
        private ClockSyncProfileCollection GetCollection()
        {
            lock (MyLock)
            {
                if (null == _collection)
                {
                    _collection = ClockSyncProfileCollection.GetCollection();
                }
                return _collection;
            }
        }
        public ClockSyncProfile[] Values
        {
            get
            {
                lock (MyLock)
                {
                    if (null == _values)
                    {
                        var collection = GetCollection();

                        var list = new List<ClockSyncProfile>();
                        using (var e = collection.GetEnumerator())
                        {
                            while (e.MoveNext())
                            {
                                if( null != e.Current && e.Current.Visible)
                                {
                                    list.Add(e.Current);
                                }
                            }
                        }
                        list.Sort((x,y) => { return x.DisplayOrder.CompareTo(y.DisplayOrder); });
                        _values = list.ToArray();
                    }
                }
                return _values;
            }
        }
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            if (sourceType == typeof(string)) { return true; }
            return base.CanConvertFrom(context, sourceType);
        }
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            var result = Array.Find(Values, x => x.ProfileName == (string)value);
            if (result != null) { return result; }
            return base.ConvertFrom(context, culture, value);
        }

        public override bool GetStandardValuesSupported(ITypeDescriptorContext context)
        {
            return true;
        }
        public override bool GetStandardValuesExclusive(ITypeDescriptorContext context)
        {
            return true;
        }
        public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
        {
            var collection = GetCollection();
            return new StandardValuesCollection(collection);
        }
    }
}