using TMPro;
using UnityEngine;

namespace Northbound
{
    public class InteractableModal : MonoBehaviour
    {
        [Header("UI References")]
        [SerializeField] private GameObject modalPanel;
        [SerializeField] private TextMeshProUGUI keyText;
        [SerializeField] private TextMeshProUGUI interactText;
        [SerializeField] private GameObject unavailablePanel;
        [SerializeField] private TextMeshProUGUI unavailableText;

        [Header("Settings")]
        [SerializeField] private string defaultKey = "E";

        private IInteractable _currentInteractable;
        private Canvas _parentCanvas;

        private void Awake()
        {
            _parentCanvas = GetComponentInParent<Canvas>();
        }

        private void Start()
        {
            if (modalPanel != null)
            {
                modalPanel.SetActive(false);
            }

            if (unavailablePanel != null)
            {
                unavailablePanel.SetActive(false);
            }
        }

        public void ShowModal(IInteractable interactable)
        {
            if (interactable == null)
            {
                HideModal();
                return;
            }

            _currentInteractable = interactable;

            if (modalPanel != null)
            {
                modalPanel.SetActive(true);
                UpdateModalContent();
            }
        }

        public void HideModal()
        {
            _currentInteractable = null;

            if (modalPanel != null)
            {
                modalPanel.SetActive(false);
            }

            if (unavailablePanel != null)
            {
                unavailablePanel.SetActive(false);
            }
        }

        public void UpdateModalContent()
        {
            if (_currentInteractable == null)
                return;

            if (keyText != null)
            {
                keyText.text = defaultKey;
            }

            if (interactText != null)
            {
                string prompt = _currentInteractable.GetInteractionPrompt();
                interactText.text = ExtractInteractText(prompt);
            }
        }

        private string ExtractInteractText(string prompt)
        {
            if (string.IsNullOrEmpty(prompt))
                return string.Empty;

            int startIndex = prompt.IndexOf(']');
            if (startIndex >= 0 && startIndex + 1 < prompt.Length)
            {
                return prompt.Substring(startIndex + 1).Trim();
            }

            return prompt;
        }

        /// <summary>
        /// 상호작용 불가능 메시지를 표시합니다.
        /// </summary>
        /// <param name="interactable">상호작용 불가능한 대상</param>
        public void ShowUnavailableMessage(IInteractable interactable)
        {
            if (interactable == null)
            {
                HideModal();
                return;
            }

            if (unavailablePanel != null)
            {
                // unavailablePanel이 할당된 경우 전용 패널 사용
                if (modalPanel != null)
                {
                    modalPanel.SetActive(false);
                }

                unavailablePanel.SetActive(true);

                if (unavailableText != null)
                {
                    string prompt = interactable.GetInteractionPrompt();
                    unavailableText.text = ExtractInteractText(prompt);
                }
            }
            else if (modalPanel != null && interactText != null)
            {
                // unavailablePanel이 없는 경우 modalPanel을 사용하여 불가능 메시지 표시
                modalPanel.SetActive(true);

                if (keyText != null)
                {
                    keyText.text = "";
                }

                string prompt = interactable.GetInteractionPrompt();
                interactText.text = ExtractInteractText(prompt);
            }
        }
    }
}