using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using System.Text.RegularExpressions;
using System.Text;
using Cysharp.Threading.Tasks;
using System.Threading.Tasks;
using System.Threading;
namespace BITKit.Transfcodes
{
    public sealed class DeUnicode : Transcode
    {
        public bool isMainThread;
        public new bool enabled;
        CancellationToken cancellationToken;
        void Start()
        {
            cancellationToken = gameObject.GetCancellationTokenOnDestroy();
        }
        public override async void Set(string t)
        {
            if (enabled)
            {
                if (isMainThread)
                {
                    await UniTask.SwitchToMainThread(cancellationToken);
                }
                else
                {
                    await UniTask.SwitchToTaskPool();
                }

                output?.Set(FromUnicodeString(t));
            }
            else
            {
                output?.Set(t);
            }

        }
        public static string FromUnicodeString(string str)
        {
            try
            {
                return new Regex(@"\\u([0-9A-F]{4})", RegexOptions.IgnoreCase | RegexOptions.Compiled).Replace(
                      str, x => string.Empty + Convert.ToChar(Convert.ToUInt16(x.Result("$1"), 16)));
            }
            catch (System.Exception e)
            {
                Debug.LogWarning(str);
                Debug.LogException(e);
                return str;
            }

        }
    }
}