using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class SwipeScript : MonoBehaviour
{
    public Image imageText;
    public List<Sprite> lengths;
    public int numberImage;
    public int lengthTexts;

    public GameObject arrowLeft;
    public GameObject arrowRight;


    private Vector2 startTouchPosition;
    private Vector2 endTouchPosition;

    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began){
            startTouchPosition = Input.GetTouch(0).position;
        }
        if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended){
            endTouchPosition = Input.GetTouch(0).position;
            if(endTouchPosition.x < startTouchPosition.x){
                NextText();
            }
            if(endTouchPosition.x > startTouchPosition.x){
                PreviousText();
            }
        }
    }

    private void NextText(){
        numberImage ++;
        if(numberImage == lengthTexts){
            arrowRight.SetActive(false);
        }else{
            arrowRight.SetActive(true);
        }
        imageText.sprite = lengths[numberImage];
    }

     private void PreviousText(){
        numberImage --;
        if(numberImage == 0){
            arrowLeft.SetActive(false);
        }else{
            arrowLeft.SetActive(true);
        }
        imageText.sprite = lengths[numberImage]; 
    }
}