using UnityEngine;
using UnityEngine.UI;

namespace UI
{
    public class ColorPicker : MonoBehaviour
    {
        [SerializeField] private Renderer previewRenderer;

        [SerializeField] private Button buttonNext;
        [SerializeField] private Button buttonPrev;
        [SerializeField] private Image  previewImage;

        private int   _currentIndex = 0;
        private Color _currentColor;
        private Color[] _colors = new Color[] { Color.green, Color.magenta, Color.yellow, Color.cyan }; 
        // Start is called once before the first execution of Update after the MonoBehaviour is created

        public Color Color => _currentColor;
        
        void Start()
        {
            _currentColor = _colors[_currentIndex];
            buttonNext.onClick.AddListener(NextColor);
            buttonPrev.onClick.AddListener(PrevColor);

            var newMaterial = new Material(previewRenderer.sharedMaterial);
            newMaterial.color = _currentColor;
            previewRenderer.sharedMaterial = newMaterial;

            UpdateMaterialColor();
        }

        private void UpdateMaterialColor()
        {
            _currentColor = _colors[_currentIndex];
            previewImage.color = _currentColor;
            previewRenderer.sharedMaterial.color = _currentColor;
        }

        private void PrevColor()
        {
            _currentIndex--;
            if (_currentIndex < 0)
            {
                _currentIndex = _colors.Length - 1;
            }

            UpdateMaterialColor();
        }

        private void NextColor()
        {
            _currentIndex++;
            if (_currentIndex == _colors.Length)
            {
                _currentIndex = 0;
            }

            UpdateMaterialColor();
        }
    }
}