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

public class CharacterSelectionUI : MonoBehaviour
{
    [SerializeField] private List<GameObject> characters;  // List of characters to display
    [SerializeField] private Button leftButton;            // Button to scroll left
    [SerializeField] private Button rightButton;           // Button to scroll right
    [SerializeField] private Button nextButton;            // Button to confirm and save the selection

    private int currentIndex = 0;  // Tracks the currently active character index

    void Start()
    {
        // Initialize the buttons' onClick events
        leftButton.onClick.AddListener(ScrollLeft);
        rightButton.onClick.AddListener(ScrollRight);
        nextButton.onClick.AddListener(SaveSelection);

        // Show only the first character at the start
        UpdateCharacterDisplay();
    }

    // Scroll to the left character
    void ScrollLeft()
    {
        if (characters.Count == 0) return;

        // Decrease the index and wrap around if necessary
        currentIndex = (currentIndex - 1 + characters.Count) % characters.Count;
        UpdateCharacterDisplay();
    }

    // Scroll to the right character
    void ScrollRight()
    {
        if (characters.Count == 0) return;

        // Increase the index and wrap around if necessary
        currentIndex = (currentIndex + 1) % characters.Count;
        UpdateCharacterDisplay();
    }

    // Saves the currently selected character index to PlayerPrefs
    void SaveSelection()
    {
        PlayerPrefs.SetInt(Constants.PlayerSelectionKey, currentIndex);
        PlayerPrefs.Save();
        Debug.Log("Character " + currentIndex + " selected and saved.");
        // SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex + 1);
        
    }

    // Updates which character is displayed based on the current index
    void UpdateCharacterDisplay()
    {
        // Loop through each character and set it active or inactive
        for (int i = 0; i < characters.Count; i++)
        {
            characters[i].SetActive(i == currentIndex);
        }
    }
}