using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using System;
using System.ComponentModel;

public class HighscoreLetterManager : MonoBehaviour
{
    private string[] Alphanumerics = new[]
    {
        "A", "B", "C", "D", "E", "F", "G", "H", "I", "J",
        "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T",
        "U", "V", "W", "X", "Y", "Z", "0", "1", "2", "3",
        "4", "5", "6", "7", "8", "9"
    };
    public bool IsActive
    {
        get
        {
            return _isActive;
        }
        set
        {
            if (value == _isActive) return;
            _isActive = value;
            Selector.GetComponent<Image>().color = _isActive ? ColorSelection : Color.clear;
            var image = Selector.GetComponent<Image>();
            var test = Selector.GetComponentInChildren<Image>();
        }
    }

    private int currentIndex;

    public Button UpButton;
    public Sprite UpButtonSprite;
    public Sprite PressedUpButtonSprite;

    public Button DownButton;
    public Sprite DownButtonSprite;
    public Sprite PressedDownButtonSprite;

    public Text LetterText;

    public GameObject Selector;
    public Color ColorSelection;

    //public string XAxis;
    public string YAxis;

    private Image upButtonImage;
    private Image downButtonImage;
    private bool letterIsChanging;
    private bool upButtonPressed;
    private bool downButtonPressed;
    private DateTime lastInput;
    public int InputDelay = 500;
    private bool _isActive;


    bool IsSpawned
    {
        get { return lastInput == null || (DateTime.Now - lastInput).Milliseconds < InputDelay; }
    }

    public string CurrentText
    { get { return Alphanumerics[CurrentIndex]; } }

    private int CurrentIndex
    {
        get
        {
            return currentIndex;
        }

        set
        {
            currentIndex = value;
        }
    }

    // Use this for initialization
    void Start()
    {
        CurrentIndex = 0;
        upButtonImage = UpButton.GetComponentInChildren<Image>();
        downButtonImage = DownButton.GetComponentInChildren<Image>();
        if (Selector != null)
            Selector.GetComponent<Image>().color = _isActive ? ColorSelection : Color.clear;
    }

    // Update is called once per frame
    void Update()
    {
        if (!IsActive) return;

        UpdateLetter();
        if (!IsSpawned)
        {
            if (!string.IsNullOrEmpty(YAxis))
            {
                var verticalAxis = Input.GetAxis(YAxis);
                if (Math.Abs(verticalAxis) == 1)
                    ChangeLetter(verticalAxis == 1);

            }
        }
    }

    private void UpdateLetter()
    {
        if (letterIsChanging) return;
        if (LetterText.text != CurrentText)
        {
            LetterText.text = CurrentText;
        }
        UpdateButtonsSprite();
    }

    private void UpdateButtonsSprite()
    {
        var upSprite = UpButtonSprite;
        var downSprite = DownButtonSprite;
        if (upButtonPressed && (DateTime.Now - lastInput).Milliseconds < 200)
        {
            upSprite = PressedUpButtonSprite;
        }
        else upButtonPressed = false;
        if (downButtonPressed && (DateTime.Now - lastInput).Milliseconds < 200)
        {
            downSprite = PressedDownButtonSprite;
        }
        else downButtonPressed = false;
        upButtonImage.sprite = upSprite;
        downButtonImage.sprite = downSprite;
    }

    public void ChangeLetter(bool plus)
    {
        if (letterIsChanging) return;
        lastInput = DateTime.Now;
        letterIsChanging = true;
        upButtonPressed = false;
        downButtonPressed = false;
        if (plus)
        {
            CurrentIndex++;
            upButtonPressed = true;
        }
        else
        {
            CurrentIndex--;
            downButtonPressed = true;
        }
        if (CurrentIndex < 0) CurrentIndex = Alphanumerics.Length - 1;
        else if (CurrentIndex >= Alphanumerics.Length) CurrentIndex = 0;
        letterIsChanging = false;
    }

    private static bool? IsPositiveMove(float axis)
    {
        bool? move = null;
        if (axis == 1) move = true;
        else if (axis == -1) move = false;
        return move;
    }


}