using System;
using System.Collections.Generic;
using TMPro;
using UnityEngine;

namespace HK.Keyboard
{
    public class Keyboard : MonoBehaviour
    {
        public TMP_InputField inputField;
        public GameObject AlphaBoardUnshifted;
        public GameObject AlphaBoardShifted;
        public GameObject NumBoardUnshifted;
        public GameObject NumBoardShifted;

        public Keyboard_Chin chin;
        private List<KeyBind> keyBinds;
        private List<KeyBind> keyBinds_Switch;
        public Action OKAction;
        public bool isHideOnAwake = false;

        private bool isChin
        {
            get => chin.isChin;
            set => chin.isChin = value;
        }

        private void Awake()
        {
            keyBinds = new List<KeyBind>();
            keyBinds_Switch = new List<KeyBind>();
            var list = transform.FindChildDeeps<KeyBind>();
            foreach (var keyBind in list)
            {
                keyBinds.Add(keyBind);
                keyBind.onClickAction += ClickKey;
                if (keyBind.keyName == "Switch")
                    keyBinds_Switch.Add(keyBind);
            }

            isChin = false;
            inputField.shouldHideSoftKeyboard = true;
            chin.selectedAction += ClickKey;

            inputField.onSelect.AddListener((a) => { gameObject.SetActive(true); });
            ShowOnlyOne(AlphaBoardUnshifted);
            if (isHideOnAwake)
            {
                gameObject.SetActive(false);
            }
        }

        void ShowOnlyOne(GameObject go)
        {
            AlphaBoardUnshifted.SetActive(false);
            AlphaBoardShifted.SetActive(false);
            NumBoardUnshifted.SetActive(false);
            NumBoardShifted.SetActive(false);
            go.SetActive(true);
        }

        [SerializeField] private string tmp_Chin;

        private void Reset()
        {
            tmp_Chin = "";
            isChin = false;
            foreach (var keyBind in keyBinds_Switch)
                keyBind.GetComponentInChildren<TMP_Text>().text = "英/<size=25>中</size>";
            ShowOnlyOne(AlphaBoardUnshifted);
        }

        void ClickKey(string keyName)
        {
            if (CheckKey(keyName))
            {
                if (chin.isChin && !chin.isSelect)
                {
                    tmp_Chin += keyName;
                    chin.PY(tmp_Chin);
                    inputField.text += keyName;
                }
                else
                {
                    if (!string.IsNullOrEmpty(tmp_Chin))
                    {
                        var length = inputField.text.Length - tmp_Chin.Length;
                        inputField.text = inputField.text.Remove(length);
                        tmp_Chin = "";
                    }

                    inputField.text += keyName;
                }
            }
        }

        bool CheckKey(string keyName)
        {
            switch (keyName)
            {
                case "Close":
                    OKAction?.Invoke();
                    // gameObject.SetActive(false);
                    return false;
                    break;
                case ".?123":
                    ShowOnlyOne(NumBoardUnshifted);
                    return false;
                    break;
                case "Remove":
                    if (chin.isChin && !chin.isSelect)
                    {
                        if (!string.IsNullOrEmpty(tmp_Chin))
                        {
                            tmp_Chin = tmp_Chin.Remove(tmp_Chin.Length - 1);
                            chin.PY(tmp_Chin);
                        }
                    }

                    var s = inputField.text;
                    if (s.Length > 0)
                        inputField.text = s.Remove(s.Length - 1);

                    return false;
                    break;
                case "Lowercase":
                    ShowOnlyOne(AlphaBoardUnshifted);
                    return false;
                    break;
                case "CapitalLetters":
                    ShowOnlyOne(AlphaBoardShifted);
                    return false;
                    break;
                case "ABC":
                    ShowOnlyOne(AlphaBoardUnshifted);
                    return false;
                    break;
                case "!@-":
                    ShowOnlyOne(NumBoardUnshifted);
                    return false;
                    break;
                case "+/\"":
                    ShowOnlyOne(NumBoardShifted);
                    return false;
                    break;
                case "OK":
                    OKAction?.Invoke();
                    return false;
                    break;
                case "Switch":
                    isChin = !isChin;
                    if (isChin)
                        foreach (var keyBind in keyBinds_Switch)
                            keyBind.GetComponentInChildren<TMP_Text>().text = "中/<size=25>英</size>";
                    else
                        foreach (var keyBind in keyBinds_Switch)
                            keyBind.GetComponentInChildren<TMP_Text>().text = "英/<size=25>中</size>";
                    return false;
                    break;
            }

            return true;
        }

        public void SetFont(TMP_FontAsset font)
        {
            inputField.fontAsset = font;
        }
    }
}