using System;
using DungeonSelection;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.UIElements;

public class DungeonSelectMenuController : MonoBehaviour
{
    private Button _next;
    private Button _previous;
    private Button _start;
    private Image _thumbnailImage;
    private Label _dungeonName;
    private VisualElement _dungeonThumbnail;

    private DungeonData _currentlyShowingDungeon;

    private void OnEnable()
    {
        VisualElement root = GetComponent<UIDocument>().rootVisualElement;

        _dungeonThumbnail = root.Q<VisualElement>("DungeonThumbnail");
        _next = root.Q<Button>("Next");
        _next.clicked += NextClicked;
        _previous = root.Q<Button>("Previous");
        _previous.clicked += PreviousClicked;
        _start = root.Q<Button>("Start");
        _start.clicked += StartClicked;
        _dungeonName = root.Q<Label>("DungeonName");
        

        GameEvents.ShowingDungeon += ShowDungeon;
        GameEvents.ShowingFirstDugeon += () => SetPreviousButtonEnabled(false);
        GameEvents.ShowingLastDungeon += () => SetNextButtonEnabled(false);
    }

    private void ShowDungeon(DungeonData dungeon)
    {
        _currentlyShowingDungeon = dungeon;
        _dungeonName.text = _currentlyShowingDungeon.DungeonName;
        
        if (_thumbnailImage == null)
        {
            _thumbnailImage = new Image();
            _thumbnailImage.scaleMode = ScaleMode.ScaleAndCrop;
            _dungeonThumbnail.Add(_thumbnailImage);
        }

        _thumbnailImage.image = _currentlyShowingDungeon.Thumbnail.texture;
    }

    private void SetPreviousButtonEnabled(bool enabled)
    {
        _previous.SetEnabled(enabled);
    }
    
    private void SetNextButtonEnabled(bool enabled)
    {
        _next.SetEnabled(enabled);
    }

    private void NextClicked()
    {
        SetPreviousButtonEnabled(true);
        SetNextButtonEnabled(true);
        UIEvents.NextDungeonClicked?.Invoke();
    }

    private void PreviousClicked()
    {
        SetPreviousButtonEnabled(true);
        SetNextButtonEnabled(true);
        UIEvents.PreviousDungeonClicked?.Invoke();
    }

    private void StartClicked()
    {
        UIEvents.EnterDungeonClicked?.Invoke(_currentlyShowingDungeon);
    }
}