using System;
using TemplateUnity.Core;
using UnityEngine;
using UnityEngine.UI;

namespace TemplateUnity.MainMenu
{
    public class UIOptionSection: UICore
    {
        public static UIOptionSection Instance { get; private set; }

        public static event EventHandler<float> onAnyMasterVolumeValueChanged;
        public static event EventHandler<float> onAnyMusicVolumeValueChanged;
        public static event EventHandler<float> onAnySfxVolumeValueChanged;
        
        public event EventHandler onExitTrigger;
        
        [SerializeField] private Button exitButton;
        [SerializeField] private Slider masterVolume;
        [SerializeField] private Slider musicVolume;
        [SerializeField] private Slider sfxVolume;
        
        private void Awake()
        {
            if (Instance)
            {
                Debug.LogWarning($"{typeof(UIOptionSection)} already instantiated! {transform}");
                Destroy(gameObject);
                return;
            }
            
            Instance = this;
        }

        private void OnEnable()
        {
            exitButton.Select();
        }

        private void Start()
        {
            exitButton.onClick.AddListener(() => onExitTrigger?.Invoke(this, EventArgs.Empty));
            
            masterVolume.onValueChanged.AddListener(amount => onAnyMasterVolumeValueChanged?.Invoke(this, amount));
            musicVolume.onValueChanged.AddListener(amount => onAnyMusicVolumeValueChanged?.Invoke(this, amount));
            sfxVolume.onValueChanged.AddListener(amount => onAnySfxVolumeValueChanged?.Invoke(this, amount));

            masterVolume.maxValue = OptionHandler.Instance.MaxVolume;
            musicVolume.maxValue = OptionHandler.Instance.MaxVolume;
            sfxVolume.maxValue = OptionHandler.Instance.MaxVolume;
            
            masterVolume.value = OptionHandler.Instance.MasterVolume;
            musicVolume.value = OptionHandler.Instance.MusicVolume;
            sfxVolume.value = OptionHandler.Instance.SfxVolume;
            
            MainMenuManager.Instance.onMainSectionReveal += (_, _) => Hide();
            MainMenuManager.Instance.onSaveSectionReveal += (_, _) => Hide();
            MainMenuManager.Instance.onOptionsSectionReveal += (_, _) => Show();
        }
    }
}