using System;
using System.Collections.Generic;
using System.Text;
using UnityEngine;
using UnityEngine.EventSystems;

namespace SC.XR.Unity.Module_Keyboard
{   
    public abstract class SCKeyboardMono : MonoBehaviour
    {
        #region Status        
        public SCKeyboardType presentKeyboardType = SCKeyboardType.Default;

        public KeyboardState presentKeyboardState = KeyboardState.Cn;
        public Action<bool> OnKeyboardShifted { get; internal set; }

        public Action<KeyboardState> OnKeyboardStateChange;

        protected bool m_IsShifted = false;

        public bool IsShifted
        {
            get
            {
                return m_IsShifted;
            }
        }
        #endregion

        #region Actions
        public Action<string> OnTextChange;

        public Action<string> OnKeyClick;
        public Action<string> OnWebKeyClick;

        public Action OnDoneKeyClick;
        public Action OnDeleteKeyClick;
        public Action OnEnterKeyClick;

        public Action<SCKeyboard.Status> OnStatusChange;

        public Action<PointerEventData> OnPointerDown;
        #endregion

        #region String Builders
        private StringBuilder _stringBuilder;
        public virtual StringBuilder stringBuilder
        {
            get
            {
                if (_stringBuilder == null) _stringBuilder = new StringBuilder();

                return _stringBuilder;
            }
        }

        private StringBuilder _preInputStringBuilder;
        public virtual StringBuilder preInputStringBuilder
        {
            get
            {
                if (_preInputStringBuilder == null) _preInputStringBuilder = new StringBuilder();

                return _preInputStringBuilder;
            }
        }
        #endregion

        #region Life Cycles

        protected virtual void Awake()
        {
            //Initialize();
        }

        protected virtual void OnEnable()
        {
            Initialize(presentKeyboardType);
        }

        protected virtual void Start()
        {

        }

        protected virtual void LateUpdate()
        {
            if (SCKeyboard._status != SCKeyboard.Status.LostFocus &&
                EventSystem.current && EventSystem.current.currentSelectedGameObject != this.gameObject)
            {
                OnStatusChange?.Invoke(SCKeyboard.Status.LostFocus);
                HideKeyboardPrompt(false);
            }
        }
        #endregion

        #region Initialize
        public virtual void Initialize(SCKeyboardType keyboardType = SCKeyboardType.Default)
        {
            switch (keyboardType)
            {
                case SCKeyboardType.Default:
                    DefaultKeyboardInitialize();
                    break;
                case SCKeyboardType.ASCIICapable:
                    ASCIICapableKeyboardInitialize();
                    break;
                case SCKeyboardType.URL:
                    URLKeyboardInitialize();
                    break;
                case SCKeyboardType.Search:
                    SearchKeyboardInitialize();
                    break;
            }
        }

        protected virtual void DefaultKeyboardInitialize()
        { 
            
        }

        protected virtual void ASCIICapableKeyboardInitialize()
        {

        }

        protected virtual void URLKeyboardInitialize()
        {

        }

        protected virtual void SearchKeyboardInitialize()
        {

        }
        #endregion

        #region Keyboards      
        protected GameObject previousKeyboard;
        protected GameObject presentKeyboard;
        public SCKeyboardBasePrompt keyboard_prompt;
        public GameObject keyboard_abc;
        #endregion

        #region Keyboard Key Dics
        public Dictionary<SpecialKeyEnum, List<SCKeyboardBaseKey>> specialKeysDic = new Dictionary<SpecialKeyEnum, List<SCKeyboardBaseKey>>();

        public Dictionary<string, List<SCKeyboardBaseKey>> symbolKeysDic = new Dictionary<string, List<SCKeyboardBaseKey>>();

        protected Dictionary<int, RectTransform> promptRowRectTransformsDic = new Dictionary<int, RectTransform>();

        public Dictionary<int, Dictionary<int, Dictionary<int, SCKeyboardBaseKey>>> promptPagesDic = new Dictionary<int, Dictionary<int, Dictionary<int, SCKeyboardBaseKey>>>();

        public Dictionary<int, Dictionary<int, Dictionary<int, string>>> chinesePagesDic = new Dictionary<int, Dictionary<int, Dictionary<int, string>>>();

        public Dictionary<int, Dictionary<int, Dictionary<int, string>>> urlPagesDic = new Dictionary<int, Dictionary<int, Dictionary<int, string>>>();

        protected Dictionary<SpecialKeyEnum, Action> specialCallbackDic;

        protected Dictionary<UGUIKeyEnum, Action> uGUICallbackDic;

        protected Dictionary<LanguageKeyEnum, Action> languageCallBackDic;

        protected virtual void InitSpecialCallbackDic()
        {
            if (specialCallbackDic == null)
            {
                specialCallbackDic = new Dictionary<SpecialKeyEnum, Action>();
            }

            specialCallbackDic.Clear();
            specialCallbackDic.Add(SpecialKeyEnum.Enter, OnEnterClick);
            specialCallbackDic.Add(SpecialKeyEnum.Delete, OnDeleteClick);
            specialCallbackDic.Add(SpecialKeyEnum.Shift, OnShiftClick);
            specialCallbackDic.Add(SpecialKeyEnum.Space, OnSpaceClick);
            specialCallbackDic.Add(SpecialKeyEnum.CapsLock, OnCapsLockClick);
            specialCallbackDic.Add(SpecialKeyEnum.Tab, OnTabClick);
            specialCallbackDic.Add(SpecialKeyEnum.Ctrl, OnCtrlClick);
            specialCallbackDic.Add(SpecialKeyEnum.Alt, OnAltClick);

            specialCallbackDic.Add(SpecialKeyEnum.Done, OnDoneClick);
            specialCallbackDic.Add(SpecialKeyEnum.Clear, OnClearClick);

            specialCallbackDic.Add(SpecialKeyEnum.Symbol, OnSymbolClick);
            specialCallbackDic.Add(SpecialKeyEnum.Number, OnNumberClick);
            specialCallbackDic.Add(SpecialKeyEnum.Meme, OnMemeClick);
            specialCallbackDic.Add(SpecialKeyEnum.ABC, OnABCClick);

            specialCallbackDic.Add(SpecialKeyEnum.Participle, OnParticipleClick);
            specialCallbackDic.Add(SpecialKeyEnum.Com, OnComClick);
            specialCallbackDic.Add(SpecialKeyEnum.Microphone, OnMicrophoneClick);

            specialCallbackDic.Add(SpecialKeyEnum.Language, OnLanguageClick);
            specialCallbackDic.Add(SpecialKeyEnum.Search, OnSearchClick);
            specialCallbackDic.Add(SpecialKeyEnum.PageDown, OnPageDownClick);
            specialCallbackDic.Add(SpecialKeyEnum.PageUp, OnPageUpClick);
            specialCallbackDic.Add(SpecialKeyEnum.PromptPageDown, OnPromptPageDownClick);
            specialCallbackDic.Add(SpecialKeyEnum.PromptPageUp, OnPromptPageUpClick);

            specialCallbackDic.Add(SpecialKeyEnum.Background, OnBackgroundClick);

            specialCallbackDic.Add(SpecialKeyEnum.Cn, OnCnClick);
            specialCallbackDic.Add(SpecialKeyEnum.En, OnEnClick);
        }

        protected virtual void InitUGUICallbackDic()
        {
            if (uGUICallbackDic == null)
            {
                uGUICallbackDic = new Dictionary<UGUIKeyEnum, Action>();
            }

            uGUICallbackDic.Clear();
            uGUICallbackDic.Add(UGUIKeyEnum.Back, OnBackClick);
            uGUICallbackDic.Add(UGUIKeyEnum.OpenMore, OnOpenMoreClick);
        }

        protected virtual void InitLanguageCallbackDic()
        {
            if (languageCallBackDic == null)
            {
                languageCallBackDic = new Dictionary<LanguageKeyEnum, Action>();
            }

            languageCallBackDic.Clear();
            languageCallBackDic.Add(LanguageKeyEnum.Chinese, OnChineseClick);
            languageCallBackDic.Add(LanguageKeyEnum.English, OnEnglishClick);
            languageCallBackDic.Add(LanguageKeyEnum.More, OnMoreClick);
        }
        #endregion

        #region Key Clicks
        public virtual void OnNormalKeyClick(string value)
        {
            OnKeyClick?.Invoke(value);
            OnWebKeyClick?.Invoke(value);
        }

        public virtual void OnNumberKeyClick(string value)
        {
            OnNormalKeyClick(value);
        }

        public virtual void OnPinyinKeyClick(string value)
        {

        }

        public virtual void OnSpecialKeyClick(SpecialKeyEnum specialKeyEnum)
        {
            if (specialCallbackDic == null)
                InitSpecialCallbackDic();

            if (specialCallbackDic.ContainsKey(specialKeyEnum))
                specialCallbackDic[specialKeyEnum]?.Invoke();
        }

        public virtual void OnLanguageKeyClick(LanguageKeyEnum languageKeyEnum)
        {
            if (languageCallBackDic == null)
                InitLanguageCallbackDic();

            if (languageCallBackDic.ContainsKey(languageKeyEnum))
            {
                languageCallBackDic[languageKeyEnum]?.Invoke();
            }
        }

        public virtual void OnPromptKeyClick(string value)
        {
            OnKeyClick?.Invoke(value);
            for (int i = 0; i < value.Length; i++)
            {
                OnWebKeyClick?.Invoke(value[i].ToString());
            }
        }
        
        public virtual void OnUGUIKeyClick(UGUIKeyEnum uguiKeyEnum)
        {
            if (uGUICallbackDic == null)
                InitUGUICallbackDic();

            if (uGUICallbackDic.ContainsKey(uguiKeyEnum))
            {
                uGUICallbackDic[uguiKeyEnum]?.Invoke();
            }
        }

        #endregion        

        #region Special Key Click Events        
        public virtual void OnEnterClick() {
            OnWebKeyClick?.Invoke("Enter");
            switch (presentKeyboardState)
            {
                case KeyboardState.Cn:
                    switch (presentKeyboardType)
                    {
                        case SCKeyboardType.URL:
                        case SCKeyboardType.Search:
                            SCKeyboard._status = SCKeyboard.Status.Done;
                            break;
                        default:                            
                            break;
                    }
                    break;
                default:
                    SCKeyboard._status = SCKeyboard.Status.Done;
                    break;
            }
            HideKeyboardPrompt();
        }
        public virtual void OnDeleteClick() {
            OnKeyClick?.Invoke("Backspace");
            OnWebKeyClick?.Invoke("Backspace");
        }
        public virtual void OnShiftClick()
        {
            //OnKeyClick?.Invoke("Tab");
            //OnWebKeyClick?.Invoke("Tab");
            OnKeyboardShifted?.Invoke(!m_IsShifted);
            m_IsShifted = !m_IsShifted;
            if (m_IsShifted)
            {
                HideKeyboardPrompt();
            }
        }
        public virtual void OnSpaceClick()
        {
            OnKeyClick?.Invoke(" ");
            OnWebKeyClick?.Invoke(" ");
        }
        public virtual void OnCapsLockClick() { }
        public virtual void OnTabClick() { }
        public virtual void OnCtrlClick() { }
        public virtual void OnAltClick() { }

        public virtual void OnDoneClick()
        {
            OnStatusChange?.Invoke(SCKeyboard.Status.Done);
            HideKeyboardPrompt();
        }
        public virtual void OnClearClick() {
            OnKeyClick?.Invoke("Backspace");
            OnWebKeyClick?.Invoke("Backspace");
        }

        public virtual void OnSymbolClick() { ActiveKeyboard(KeyboardEnum.Symbol); }
        public virtual void OnNumberClick() { ActiveKeyboard(KeyboardEnum.Number); }
        public virtual void OnMemeClick() { /*ActiveKeyboard(KeyboardEnum.Meme);*/ }
        public virtual void OnABCClick() { /*ActiveKeyboard(KeyboardEnum.Meme);*/ }

        public virtual void OnParticipleClick() {
            OnKeyClick?.Invoke("/");
            OnWebKeyClick?.Invoke("/"); 
        }
        public virtual void OnComClick()
        {
            OnKeyClick?.Invoke(".com");
            OnWebKeyClick?.Invoke(".com");
        }
        public virtual void OnMicrophoneClick() { }

        public virtual void OnLanguageClick() { ActiveKeyboard(KeyboardEnum.Language); }
        public virtual void OnSearchClick() { }
        public virtual void OnPageDownClick() { }
        public virtual void OnPageUpClick() { }
        public virtual void OnPromptPageDownClick() { }
        public virtual void OnPromptPageUpClick() { }
        public virtual void OnBackgroundClick() { }
        public virtual void OnCnClick() { ActiveKeyboard(KeyboardEnum.ABC, KeyboardState.En); }
        public virtual void OnEnClick() { ActiveKeyboard(KeyboardEnum.ABC, KeyboardState.Cn); }
        #endregion

        #region UGUI Key Click Events
        protected virtual void OnBackClick()
        {
            previousKeyboard.SetActive(true);
            presentKeyboard.SetActive(false);
            presentKeyboard = previousKeyboard;
        }

        protected virtual void OnOpenMoreClick()
        {

        }
        #endregion

        #region Language Key Click Events
        public virtual void OnChineseClick()
        {
            ActiveKeyboard(KeyboardEnum.ABC,KeyboardState.Cn);
        }

        public virtual void OnEnglishClick()
        {
            ActiveKeyboard(KeyboardEnum.ABC,KeyboardState.En);
        }

        public virtual void OnMoreClick()
        {

        }
        #endregion

        #region Key Handlers
        protected virtual string keyPath { get { return "Prefabs/Key/2D/PromptKey"; } }
        protected virtual string rowPath { get { return "Prefabs/Key/2D/PromptRow"; } }
        public virtual void PinyinKeyHandler(string preInput)
        { 
            
        }
        #endregion

        #region Active Keyboards
        protected virtual void ActiveKeyboard(KeyboardEnum keyboardEnum, KeyboardState keyboardState = KeyboardState.En)
        {
            if (m_IsShifted)
            {
                OnShiftClick();
            }
        }

        protected virtual void InitKeyboard(KeyboardEnum keyboardEnum)
        { 
            
        }

        protected virtual void HideKeyboardPrompt(bool inputPreString = true)
        { 
            
        }
        #endregion

        #region Methods
        public virtual void SetTextString()
        {

        }

        public virtual void SetKeyboardType(SCKeyboardType scKeyboardType)
        {
            presentKeyboardType = scKeyboardType;
        }
        #endregion

    }
}