using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using BITKit;
using BITKit.UX;
using Cysharp.Threading.Tasks;
using Net.BITKit.Localization;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.UIElements;

namespace Net.BITKit.UX
{
    public class UXLocalization:IDisposable
    {
        public string[] Lang { get; set; } =
        {
            "zh-CN",
            "en-US",
            "ja-JP",
        };
        public static string USS { get; set; } = "localized";
        private readonly IUXService _uxService;
        private readonly ILocalizationService _localizationService;
        private readonly IMainTicker _ticker;

        public UXLocalization(IUXService uxService, ILocalizationService localizationService, IMainTicker ticker)
        {
            _uxService = uxService;
            _localizationService = localizationService;
            _ticker = ticker;

            _localizationService.OnLanguageChanged += OnLanguageChanged;
            _localizationService.OnLocalizeAsync += OnLocalizeAsync;
            
            _ticker.Add(OnTick);
        }

        private void OnTick(float obj)
        {
            if (Mouse.current.rightButton.wasPressedThisFrame is false) return;
            if (_uxService.TryPick(Mouse.current.position.ReadValue(), out var o) is false) return;
            if (o is not VisualElement visualElement) return;
            if (visualElement.ClassListContains(USS) is false) return;
            var builder =
                ContextMenuBuilder
                    .Create()
                    .BuildText(_localizationService.GetLocalizedString("Translate"));

            foreach (var lang in Lang)
            {
                builder.BuildAction(lang, () => Localize(visualElement, lang));
            }
            /*
            foreach (var lang in Enum.GetValues(typeof(Lang)))
            {
                var code = lang.GetType().GetMember(lang.ToString())[0].GetCustomAttribute<DescriptionAttribute>()
                    .Description;
                builder.BuildAction(code, () => Localize(visualElement, code));
            }
            */

            builder.BuildAction("Default", () => Localize(visualElement, _localizationService.CurrentLanguage));
            builder.Build();
        }

        private UniTask<bool> OnLocalizeAsync(string arg1, object arg2)
        {
            if (arg2 is not VisualElement visualElement) return UniTask.FromResult(false);
            
            Localize((object)visualElement);
            return UniTask.FromResult(true);
        }

        private void Localize(VisualElement visualElement, string lang = null)
        {
            if (string.IsNullOrEmpty(lang))
            {
                lang = _localizationService.CurrentLanguage;
            }

            var currentLang = _localizationService.GetLocalizedString('#' + visualElement.viewDataKey,
                _localizationService.CurrentLanguage);

            var translate = _localizationService.GetLocalizedString('#' + visualElement.viewDataKey, lang);

            if (string.Equals(visualElement.tooltip, currentLang))
            {
                visualElement.tooltip = translate;
                foreach (var child in visualElement.Children())
                {
                    if (child.pickingMode is PickingMode.Position)
                    {
                        child.tooltip = translate;
                    }
                }
            }
            
            switch (visualElement)
            {
                case Label label:
                {
                    label.text = translate;
                }
                    break;
                case Button button:
                {
                    button.text = translate;
                }
                    break;
                case ProgressBar progressBar:
                {
                    progressBar.title = translate;
                }
                    break;
                case Foldout foldout:
                {
                    foldout.text = translate;
                }
                    break;
                default:
                {
                    ContinueWithBaseType(visualElement.GetType());
                    void ContinueWithBaseType(Type type)
                    {
                        while (true)
                        {
                            if (type is not null)
                            {
                                if (type.GetProperty("label", ReflectionHelper.Flags) is { } propertyInfo)
                                {
                                    //Debug.Log($"{x.name}:#{x.viewDataKey}");
                                    propertyInfo.SetValue(visualElement,translate);
                                }
                                else
                                {
                                    type = type.BaseType;
                                    continue;
                                }
                            }
                            if (type == null || type == typeof(object))
                            {
                                break;
                                //throw new NotImplementedException($"{visualElement.GetType().Name} is not translatable");
                            }
                        }
                    }
                }
                    break;
            }
        }
        private void Localize(object obj)
        {
            switch (obj)
            {
                case VisualElement visualElement:
                {
                    foreach (var x in      visualElement.Query(className:USS).Build())
                    {
                        Localize(x);
                    }
                    /*
                    foreach (var x in  visualElement.Query<Label>(className:USS).ToList())
                    {
                        if (string.IsNullOrEmpty(x.viewDataKey))continue;
                        x.text = _localizationService.GetLocalizedString('#'+x.viewDataKey);
                    }

                    foreach (var x in visualElement.Query<Button>(className:USS).ToList())
                    {
                        if(string.IsNullOrEmpty(x.viewDataKey))continue;
                        x.text = _localizationService.GetLocalizedString('#'+x.viewDataKey);
                    }
            
                    foreach (var x in visualElement.Query<ProgressBar>(className:USS).ToList())
                    {
                        if(string.IsNullOrEmpty(x.viewDataKey))continue;
                        x.title = _localizationService.GetLocalizedString('#'+x.viewDataKey);
                    }
            
                    foreach (var x in visualElement.Query(className:USS).ToList())
                    {
                        if(string.IsNullOrEmpty(x.viewDataKey))continue;
                        continue;
                    }
                    */
                }
                    break;
            }
        }

        private void OnLanguageChanged(string arg1, string arg2)
        {
            if (_uxService.Root is not VisualElement visualElement) return;

            Localize(visualElement);
        }

        public void Dispose()
        {
            _ticker.Remove(OnTick);
        }
    }

}