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

public class OnKeyboardButton : MonoBehaviour, ISelectHandler, IDeselectHandler
{
    public string key;
    public string altKey;
    private TextMeshProUGUI buttonText;
    private Button thisButton;

    private Color defaultTextColor = new Color(0.6431373f, 0.6431373f, 0.6431373f, 1);

    [SerializeField] private bool isSymbolsKey;
    [SerializeField] private bool isEnterKey;
    [SerializeField] private bool isDeleteKey;
    [SerializeField] private bool isShiftKey;
    [SerializeField] private bool isSpaceKey;

    private bool _switchToSymbols;
    public bool SwitchToSymbols
    {
        get => _switchToSymbols;
        set
        {
            _switchToSymbols = value;
            if (_switchToSymbols)
            {
                buttonText.text = altKey;
            }
            else
            {
                buttonText.text = key;
            }
        }
    }

    private bool _capitalizeCharacters;
    public bool CapitalizeCharacters
    {
        get => _capitalizeCharacters;
        set
        {
            _capitalizeCharacters = value;
            if (!IsSymbolsKeys())
            {
                if (_capitalizeCharacters)
                {
                    key = key.ToUpper();
                    buttonText.text = key.ToUpper();
                }
                else
                {
                    key = key.ToLower();
                    buttonText.text = key.ToLower();
                }
            }

        }
    }

    private bool IsSymbolsKeys()
    {
        return SwitchToSymbols || isEnterKey || isDeleteKey || isSpaceKey || isSymbolsKey || isShiftKey;
    }

    private void Awake()
    {
        buttonText = GetComponentInChildren<TextMeshProUGUI>();
        thisButton = GetComponent<Button>();
        CapitalizeCharacters = false;

        if (!IsSymbolsKeys())
        {
            buttonText.text = key.ToLower();
        }
        else
        {
            buttonText.text = key;
        }
    }
    void Start()
    {
        if (!IsSymbolsKeys()) { thisButton.onClick.AddListener(TypeLetter); }

        if (isEnterKey) { thisButton.onClick.AddListener(CloseKeyboard); }
        if (isSymbolsKey) { thisButton.onClick.AddListener(OnScreenKeyboard.Instance.ToggleSymbols); }
        if (isDeleteKey) { thisButton.onClick.AddListener(OnScreenKeyboard.Instance.DeleteLetter); }
        if (isShiftKey) { thisButton.onClick.AddListener(OnScreenKeyboard.Instance.ToggleCapitalization); }
        if (isSpaceKey) { thisButton.onClick.AddListener(OnScreenKeyboard.Instance.InsertSpace); }

    }

    private void TypeLetter()
    {
        OnScreenKeyboard.Instance.TypeLetter(SwitchToSymbols ? altKey : key);
    }

    public void ToggleSymbols()
    {
        SwitchToSymbols = !SwitchToSymbols;
    }

    public void ToggleCapitalization()
    {
        CapitalizeCharacters = !CapitalizeCharacters;
    }

    private void CloseKeyboard()
    {
        StartCoroutine(OnScreenKeyboard.Instance.CloseKeyboardRoutine());
    }

    public void OnSelect(BaseEventData eventData)
    {
        buttonText.color = thisButton.colors.selectedColor;
    }

    public void OnDeselect(BaseEventData eventData)
    {
        buttonText.color = defaultTextColor;
    }
}