using System.Collections.ObjectModel;
using System.Text;
using ClassicAssist.UI.ViewModels;
using ClassicAssist.UO.Network;
using ClassicAssist.UO.Objects.Gumps;

namespace ClassicAssist.Shared.UI.ViewModels.Debug
{
    public class DebugGumpViewModel : BaseViewModel
    {
        private ObservableCollection<Gump> _items = new ObservableCollection<Gump>();
        private Gump _selectedItem;
        private string _text;

        public DebugGumpViewModel()
        {
            if ( Engine.Gumps.GetGumps( out Gump[] gumps ) )
            {
                foreach ( Gump gump in gumps )
                {
                    Items.Add( gump );
                }
            }

            IncomingPacketHandlers.GumpEvent += ( id, serial, gump ) => _dispatcher.Invoke( () =>
            {
                if ( Items.Contains( gump ) )
                {
                    UpdateText( gump );
                }
                else
                {
                    Items.Add( gump );
                }
            } );

            OutgoingPacketHandlers.GumpEvent +=
                ( id, serial, gump ) => _dispatcher.Invoke( () => Items.Remove( gump ) );
        }

        public ObservableCollection<Gump> Items
        {
            get => _items;
            set => SetProperty( ref _items, value );
        }

        public Gump SelectedItem
        {
            get => _selectedItem;
            set
            {
                SetProperty( ref _selectedItem, value );
                UpdateText( value );
            }
        }

        public string Text
        {
            get => _text;
            set => SetProperty( ref _text, value );
        }

        private void UpdateText( Gump value )
        {
            if ( value == null )
            {
                return;
            }

            StringBuilder sb = new StringBuilder();

            sb.AppendLine( $"Gump ID: 0x{value.ID:x8}" );
            sb.AppendLine( $"Serial: 0x{value.Serial:x8}" );
            sb.AppendLine( $"Pages: {value.Pages?.Length}" );
            sb.AppendLine();
            sb.AppendLine(
                $"Layout: ({value.Layout?.Length})\r\n\r\n{string.Join( "}\r\n", value.Layout?.Split( '}' ) ?? new string[0] )}" );
            sb.AppendLine();
            sb.AppendLine( $"Text: ({value.Strings.Length})\r\n\r\n{string.Join( "\r\n", value.Strings )}" );
            sb.AppendLine();
            sb.AppendLine( $"Elements ({value.GumpElements?.Length}):" );
            sb.AppendLine();

            if ( value.GumpElements != null )
            {
                foreach ( GumpElement element in value.GumpElements )
                {
                    sb.AppendLine(
                        $"X: {element.X}, Y: {element.Y}, Type: {element.Type}, Cliloc: {element.Cliloc}, Text: {element.Text}" );
                }
            }

            Text = sb.ToString();
        }
    }
}