using System;
using MedievalParty.Core;
using MedievalParty.MainMenu.MainSection;
using MedievalParty.MainMenu.Option;
using UnityEngine;

namespace MedievalParty.MainMenu
{
    public class MainMenuManager: StateBehaviour
    {
        public static MainMenuManager Instance { get; private set; }

        public event EventHandler<Section> onSectionChange;

        public enum Section
        {
            Main,
            Option
        }
        
        private MainManuManager_MainSectionState _mainSectionState;
        private MainMenuManager_OptionState _optionState;
        
        private void Awake()
        {
            if (Instance)
            {
                Debug.LogWarning($"{typeof(MainMenuManager)} already exist! {transform}");
                Destroy(gameObject);
                return;
            }

            Instance = this;
        }

        protected override void Start()
        {
            base.Start();
            
            _mainSectionState = new MainManuManager_MainSectionState();
            _optionState = new MainMenuManager_OptionState();
            
            _mainSectionState.onOptionTrigger += (_, _) => ChangeSection(Section.Option);
            _optionState.onExitTrigger += (_, _) => ChangeSection(Section.Main);
            
            ChangeSection(Section.Main);
        }

        private void ChangeSection(Section section)
        {
            switch (section)
            {
                case Section.Main:
                    ChangeState(_mainSectionState);
                    onSectionChange?.Invoke(this, Section.Main);
                    break;
                
                case Section.Option:
                    ChangeState(_optionState);
                    onSectionChange?.Invoke(this, Section.Option);
                    break;
            }
        }
    }
}