using UnityEngine;
using TMPro;

namespace Unheimlich.UI
{
    public class DialogueScreenUI : MonoBehaviour
    {
        public static DialogueScreenUI Instance { get; private set; }
        
        [Header("UI References")]
        [SerializeField] private GameObject _dialoguePanel;
        [SerializeField] private TextMeshProUGUI _speakerText;
        [SerializeField] private TextMeshProUGUI _dialogueText;
        
        [Header("Fade Settings")]
        [SerializeField] private float _fadeOutDuration = 0.5f;
        
        private CanvasGroup _canvasGroup;
        
        private void Awake()
        {
            if (Instance != null && Instance != this)
            {
                Debug.LogWarning("[DialogueScreenUI] Multiple instances detected! Destroying duplicate.");
                Destroy(gameObject);
                return;
            }
            
            Instance = this;
            
            if (_dialoguePanel != null)
            {
                _canvasGroup = _dialoguePanel.GetComponent<CanvasGroup>();
                
                if (_canvasGroup == null)
                    _canvasGroup = _dialoguePanel.AddComponent<CanvasGroup>();
            }
        }
        
        private void OnDestroy()
        {
            if (Instance == this)
                Instance = null;
        }
        
        public void Show(string speaker, string dialogue)
        {
            if (_speakerText != null)
                _speakerText.text = speaker;
            
            if (_dialogueText != null)
                _dialogueText.text = dialogue;
            
            if (_dialoguePanel != null)
            {
                _dialoguePanel.SetActive(true);
                
                if (_canvasGroup != null)
                {
                    LeanTween.cancel(_dialoguePanel);
                    _canvasGroup.alpha = 1f;
                }
            }
        }
        
        public void Hide()
        {
            if (_dialoguePanel != null)
                _dialoguePanel.SetActive(false);
        }
        
        public void FadeOutAndHide(System.Action onComplete = null)
        {
            if (_canvasGroup != null && _dialoguePanel != null)
            {
                LeanTween.cancel(_dialoguePanel);
                LeanTween.alphaCanvas(_canvasGroup, 0f, _fadeOutDuration)
                    .setOnComplete(() =>
                    {
                        Hide();
                        onComplete?.Invoke();
                    });
            }
            else
            {
                Hide();
                onComplete?.Invoke();
            }
        }
    }
}