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

public class Swipe_Control : MonoBehaviour
{
    public GameObject scrollbar;
    private float scroll_pos = 0;
    private float[] pos;
    private int posisi = 0;
    private Scrollbar scrollbarComponent;

    void Start()
    {
        // Pastikan scrollbar tidak null sebelum mengakses komponennya
        if (scrollbar != null)
        {
            scrollbarComponent = scrollbar.GetComponent<Scrollbar>();
        }
        else
        {
            Debug.LogError("Scrollbar is not assigned!");
            return;
        }

        // Pastikan scrollbarComponent tidak null setelah mencoba mendapatkannya
        if (scrollbarComponent == null)
        {
            Debug.LogError("Scrollbar component is not found on the assigned GameObject!");
            return;
        }

        int childCount = transform.childCount;
        pos = new float[childCount];
        float distance = 1f / (childCount - 1f);
        for (int i = 0; i < childCount; i++)
        {
            pos[i] = distance * i;
        }
    }

    public void next()
    {
        if (posisi < pos.Length - 1)
        {
            posisi += 1;
            scroll_pos = pos[posisi];
        }
    }

    public void prev()
    {
        if (posisi > 0)
        {
            posisi -= 1;
            scroll_pos = pos[posisi];
        }
    }

    void Update()
    {
        // Pastikan scrollbarComponent tidak null sebelum menggunakannya
        if (scrollbarComponent == null)
        {
            Debug.LogError("Scrollbar tidak terinisiasi");
            return;
        }

        if (Input.GetMouseButton(0))
        {
            scroll_pos = scrollbarComponent.value;
        }
        else
        {
            for (int i = 0; i < pos.Length; i++)
            {
                float distance = 1f / (pos.Length - 1f);
                if (scroll_pos < pos[i] + (distance / 2) && scroll_pos > pos[i] - (distance / 2))
                {
                    scrollbarComponent.value = Mathf.Lerp(scrollbarComponent.value, pos[i], 0.15f);
                    posisi = i;
                }
            }
        }
    }

    public void ButtonBack(string scenename)
    {
        SceneManager.LoadScene(scenename);
    }
}