using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Serialization;

namespace DungeonSelection
{
    public class DungeonSelector : MonoBehaviour
    {
        [SerializeField] private DungeonData[] dungeons;
        private DungeonData _currentlySelectedDungeonData;
        private int _currentlySelectedDungeonIndex = 0;

        private void OnEnable()
        {
            UIEvents.NextDungeonClicked += SelectNextDungeon;
            UIEvents.PreviousDungeonClicked += SelectPreviousDungeon;
            UIEvents.EnterDungeonClicked += LoadDungeon;
        }

        private void OnDisable()
        {
            UIEvents.NextDungeonClicked -= SelectNextDungeon;
            UIEvents.PreviousDungeonClicked -= SelectPreviousDungeon;
            UIEvents.EnterDungeonClicked -= LoadDungeon;
        }

        private void Start()
        {
            GameEvents.DungeonSelectionStarted?.Invoke();
            
            _currentlySelectedDungeonData = dungeons[_currentlySelectedDungeonIndex];
            GameEvents.ShowingDungeon?.Invoke(_currentlySelectedDungeonData);
            if (_currentlySelectedDungeonIndex == 0)
            {
                GameEvents.ShowingFirstDugeon?.Invoke();
            }
        }

        private void LoadDungeon(DungeonData dungeon)
        {
            GameEvents.LoadDungeon?.Invoke(dungeon);
        }

        private void SelectNextDungeon()
        {
            if (_currentlySelectedDungeonIndex + 1 >= dungeons.Length) return;
            _currentlySelectedDungeonIndex++;
            _currentlySelectedDungeonData = dungeons[_currentlySelectedDungeonIndex];
            GameEvents.ShowingDungeon?.Invoke(_currentlySelectedDungeonData);
            if (_currentlySelectedDungeonIndex == dungeons.Length - 1)
            {
                GameEvents.ShowingLastDungeon?.Invoke();
            }
        }

        private void SelectPreviousDungeon()
        {
            if (_currentlySelectedDungeonIndex - 1 < 0) return;
            _currentlySelectedDungeonIndex--;
            _currentlySelectedDungeonData = dungeons[_currentlySelectedDungeonIndex];
            GameEvents.ShowingDungeon?.Invoke(_currentlySelectedDungeonData);
            if (_currentlySelectedDungeonIndex == 0)
            {
                GameEvents.ShowingFirstDugeon?.Invoke();
            }
        }
    }
}