using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics.Contracts;
using System.Linq;
using System.Windows.Forms;
using ReClassNET.Extensions;
using ReClassNET.Util;

namespace ReClassNET.UI
{
	public class EnumComboBox<TEnum> : ComboBox where TEnum : struct
	{
		#region Properties

		[Browsable(false)]
		[EditorBrowsable(EditorBrowsableState.Never)]
		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public new ObjectCollection Items => new ObjectCollection(this);

		[Browsable(false)]
		[EditorBrowsable(EditorBrowsableState.Never)]
		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public new AutoCompleteMode AutoCompleteMode { get => AutoCompleteMode.None; set { } }

		[Browsable(false)]
		[EditorBrowsable(EditorBrowsableState.Never)]
		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public new ComboBoxStyle DropDownStyle { get => ComboBoxStyle.DropDownList; set { } }

		[Browsable(false)]
		[EditorBrowsable(EditorBrowsableState.Never)]
		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public new string DisplayMember { get; set; }

		[Browsable(false)]
		[EditorBrowsable(EditorBrowsableState.Never)]
		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public new bool FormattingEnabled { get; set; }

		[Browsable(false)]
		[EditorBrowsable(EditorBrowsableState.Never)]
		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public new string ValueMember { get; set; }

		[Browsable(false)]
		[EditorBrowsable(EditorBrowsableState.Never)]
		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public new object DataSource { get; set; }

		[Browsable(false)]
		[EditorBrowsable(EditorBrowsableState.Never)]
		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public new TEnum SelectedValue
		{
			get => ((EnumDescriptionDisplay<TEnum>)base.SelectedItem)?.Value ?? default(TEnum);
			set => base.SelectedItem = base.Items.Cast<EnumDescriptionDisplay<TEnum>>().PredicateOrFirst(e => e.Value.Equals(value));
		}

		[Browsable(false)]
		[EditorBrowsable(EditorBrowsableState.Never)]
		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public new TEnum SelectedItem
		{
			get => SelectedValue;
			set => SelectedValue = value;
		}

		[Browsable(false)]
		[EditorBrowsable(EditorBrowsableState.Never)]
		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		public new string SelectedText
		{
			get => ((EnumDescriptionDisplay<TEnum>)base.SelectedItem).Description;
			set => base.SelectedItem = base.Items.Cast<EnumDescriptionDisplay<TEnum>>().PredicateOrFirst(e => e.Description.Equals(value));
		}

		#endregion

		public EnumComboBox()
		{
			base.AutoCompleteMode = AutoCompleteMode.None;
			base.DropDownStyle = ComboBoxStyle.DropDownList;
			base.FormattingEnabled = false;
			base.DisplayMember = nameof(EnumDescriptionDisplay<TEnum>.Description);
			base.ValueMember = nameof(EnumDescriptionDisplay<TEnum>.Value);

			SetValues(EnumDescriptionDisplay<TEnum>.Create());
			if (base.Items.Count != 0)
			{
				SelectedIndex = 0;
			}
		}

		public void SetAvailableValues(TEnum item1, params TEnum[] items)
		{
			SetAvailableValues(items.Prepend(item1));
		}

		public void SetAvailableValues(IEnumerable<TEnum> values)
		{
			Contract.Requires(values != null);

			SetValues(EnumDescriptionDisplay<TEnum>.CreateExact(values));
		}

		public void SetAvailableValuesExclude(TEnum item1, params TEnum[] items)
		{
			SetAvailableValuesExclude(items.Prepend(item1));
		}

		public void SetAvailableValuesExclude(IEnumerable<TEnum> values)
		{
			Contract.Requires(values != null);

			SetValues(EnumDescriptionDisplay<TEnum>.CreateExclude(values));
		}

		private void SetValues(List<EnumDescriptionDisplay<TEnum>> values)
		{
			Contract.Requires(values != null);

			base.Items.Clear();
			base.Items.AddRange(values.ToArray());
		}
	}
}