using System.Collections.Generic;
using UnityEngine;


namespace PDFViewer.Scripts {
    public class PDFDisplay : MonoBehaviour
    {
    
        public int currentPageIndex = 0;

        [SerializeField] ConvertedPDF convertedPDFAsset = default;
        
        public KeyCode next;
        public KeyCode previous;

        List<Texture2D> pages;
        string pdfPath;
        

        void Start() {
            if (convertedPDFAsset == null) Debug.LogError("Null PDF File", this);
            pages = convertedPDFAsset.Pages;
            
            if(pages.Count == 0) {
                Debug.LogError("No Pages specified");
                return;
            }

            SetToPage(currentPageIndex);
        }

        void SetToPage(int pageIndex) {
        
            gameObject.GetComponent<Renderer>().material.mainTexture = pages[pageIndex];
        }

        // Update is called once per frame
        void Update()
        {
            if (Input.GetKeyDown(next) && currentPageIndex < pages.Count) {
                GoToNextPage();
            }
            else if (Input.GetKeyDown(previous) && currentPageIndex > 0) {
                GoToPreviousPage();
            }
        }
    
        void GoToPreviousPage() {
            currentPageIndex--;
            SetToPage(currentPageIndex);
        }
    

        void GoToNextPage() {
            currentPageIndex++;
            SetToPage(currentPageIndex);
        }



    }
}