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

public class MStringStepper : MonoBehaviour
{
    public event Action<string> OnValueChanged;

    [SerializeField] private TextMeshProUGUI _valueLabel;
    [SerializeField] private CanvasGroup _leftArrow;
    [SerializeField] private CanvasGroup _rightArrow;

    private string _value;
    private List<string> _values;
    private int _index;
    private bool _switched = false;

    public void Initialize(string value, List<string> values)
    {
        _value = value;
        _values = values;
        _index = values.IndexOf(value);

        UpdateView();
    }

    public void SetDirection(int direction)
    {
        if(_switched && direction == 0)
            _switched = false;

        if(_switched) return;


        int newIndex = _index + direction;
        newIndex = Mathf.Clamp(newIndex, 0, _values.Count - 1);

        bool valueChanged = newIndex != _index;
        if (valueChanged)
        {
            _index = newIndex;
            
            _value = _values[_index];
            OnValueChanged?.Invoke(_value);
            UpdateView();
            _switched = true;
        }
    }

    private void UpdateView()
    {
        _valueLabel.text = _value.ToString();

        _leftArrow.alpha = _index == 0 ? 0 : 1;
        _rightArrow.alpha = _index == _values.Count - 1 ? 0 : 1;
    }
}