using SO;
using SO.Channels;
using UnityEngine;
using UnityEngine.UI;

namespace Managers
{
    public class DocumentManager : MonoBehaviour
    {
        [SerializeField] private StepChangeChannelSO stepChangeChannel;
        [SerializeField] private SimpleChannelSO documentLoadedChannel;
        [SerializeField] private Material currentImage;
        private const string MainText = "_MainTex";
        private static readonly int MainTex = Shader.PropertyToID(MainText);
        
        private void OnEnable()
        {
            stepChangeChannel.OnStepChanged += OnStepChanged;
        }
        
        private void OnDisable()
        {
            stepChangeChannel.OnStepChanged -= OnStepChanged;
        }

        private void OnStepChanged(StepSO step)
        {
            currentImage.SetTexture(MainTex, step.Document);
            documentLoadedChannel.RaiseEvent();
        }
    }
}