using Editor;
using Sandbox;
using System;

namespace SpriteTools;

internal class LabelTextEntry : Widget
{
	internal SerializedProperty Property;
	string lastValue = "";
	internal string lastSafeValue = "";

	public bool IsItalic = false;
	public bool IsHidden = false;

	public string EmptyValue
	{
		get => _emptyValue;
		set
		{
			_emptyValue = value;
			RebuildUI();
		}
	}
	string _emptyValue = "N/A";

	bool editing = false;
	RealTimeSince timeSinceLastEdit = 0;
	StringControlWidget stringControl;

	internal Func<string, bool> OnStopEditing;

	public LabelTextEntry ( SerializedProperty property ) : base( null )
	{
		Layout = Layout.Row();
		Property = property;
		MinimumHeight = 14;

		RebuildUI();
	}

	void RebuildUI ()
	{
		Layout.Clear( true );

		if ( editing )
		{
			stringControl = Layout.Add( new StringControlWidget( Property ) );
			stringControl.HorizontalSizeMode = SizeMode.CanShrink;
			stringControl.MaximumWidth = 250;
			Layout.AddStretchCell();
		}
	}

	protected override void OnDoubleClick ( MouseEvent e )
	{
		timeSinceLastEdit = 0;

		if ( editing )
		{
			editing = false;
			RebuildUI();
		}
		else
		{
			Edit();
		}
	}

	protected override void OnKeyPress ( KeyEvent e )
	{
		base.OnKeyPress( e );

		if ( e.Key == KeyCode.Enter || e.Key == KeyCode.Return )
		{
			StopEditing();
		}
	}

	public void Edit ()
	{
		lastSafeValue = Property.GetValue( "N/A" );
		editing = true;
		timeSinceLastEdit = 0f;
		RebuildUI();
		stringControl?.StartEditing();
	}

	public void StopEditing ()
	{
		if ( !editing ) return;

		editing = false;
		var value = Property.GetValue( "" );
		if ( OnStopEditing?.Invoke( value ) ?? true )
		{
			Property.SetValue( value );
		}
		RebuildUI();
	}

	[EditorEvent.Frame]
	void Frame ()
	{
		if ( editing )
		{
			var val = Property.GetValue( "" );
			if ( lastValue != val )
			{
				lastValue = val;
				timeSinceLastEdit = 0;
			}

			if ( timeSinceLastEdit > 5f )
			{
				StopEditing();
			}
		}
	}

	protected override void OnPaint ()
	{
		base.OnPaint();

		if ( editing ) return;
		Paint.SetPen( Theme.TextControl.WithAlpha( IsHidden ? 0.5f : 1f ) );
		var val = Property.GetValue( EmptyValue );
		if ( string.IsNullOrEmpty( val ) ) val = EmptyValue;
		Paint.SetDefaultFont( italic: IsItalic );
		Paint.DrawText( LocalRect, val, TextFlag.LeftCenter );
	}
}