using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.UIElements;

namespace BITKit.UX
{
	public class CustomTextField : TextField
	{
		public const string errorUssName = "error";
		public new class UxmlTraits : TextField.UxmlTraits
		{
			private readonly UxmlStringAttributeDescription m_RegexAttribute = new ()
			{
				name = "Regex"
			};

			public override void Init(VisualElement ve, IUxmlAttributes bag, CreationContext cc)
			{
				base.Init(ve, bag, cc);
				var textField = (CustomTextField)ve;
				textField.Regex = m_RegexAttribute.GetValueFromBag(bag, cc);
			}
		}
		public new class UxmlFactory : UxmlFactory<CustomTextField, UxmlTraits> { }
		public CustomTextField():base()
		{
			this.RegisterValueChangedCallback(OnValueChangedInternal);
		}
		public string Regex { get; set; }
		public event Action<string> OnValueChanged; 
		private void OnValueChangedInternal(ChangeEvent<string> evt)
		{
			var isMatch = string.IsNullOrEmpty(Regex) || System.Text.RegularExpressions.Regex.IsMatch(evt.newValue, Regex);
			this.Q("unity-text-input").EnableInClassList(errorUssName, !isMatch);
			if (isMatch)
			{
				OnValueChanged?.Invoke(evt.newValue);
			}
		}
	}

}