using System;
using AppleHills.Core.Settings;
using Core;
using Input;
using Interactions;
using UnityEngine;

// Added for IInteractionSettings

namespace LevelS
{
    /// <summary>
    /// Handles level switching when interacted with. Applies switch data and triggers scene transitions.
    /// </summary>
    public class LevelSwitch : MonoBehaviour
    {
        /// <summary>
        /// Data for this level switch (target scene, icon, etc).
        /// </summary>
        public LevelSwitchData switchData;
        private SpriteRenderer _iconRenderer;
        private Interactable _interactable;
    
        // Settings reference
        private IInteractionSettings _interactionSettings;

        private bool _isActive = true;

        /// <summary>
        /// Unity Awake callback. Sets up icon, interactable, and event handlers.
        /// </summary>
        void Awake()
        {
            _isActive = true;
            if (_iconRenderer == null)
                _iconRenderer = GetComponent<SpriteRenderer>();
            _interactable = GetComponent<Interactable>();
            if (_interactable != null)
            {
                _interactable.characterArrived.AddListener(OnCharacterArrived);
            }
        
            // Initialize settings reference
            _interactionSettings = GameManager.GetSettingsObject<IInteractionSettings>();
        
            ApplySwitchData();
        }

        /// <summary>
        /// Unity OnDestroy callback. Cleans up event handlers.
        /// </summary>
        void OnDestroy()
        {
            if (_interactable != null)
            {
                _interactable.characterArrived.RemoveListener(OnCharacterArrived);
            }
        }

#if UNITY_EDITOR
        /// <summary>
        /// Unity OnValidate callback. Ensures icon and data are up to date in editor.
        /// </summary>
        void OnValidate()
        {
            if (_iconRenderer == null)
                _iconRenderer = GetComponent<SpriteRenderer>();
            ApplySwitchData();
        }
#endif

        /// <summary>
        /// Applies the switch data to the level switch (icon, name, etc).
        /// </summary>
        public void ApplySwitchData()
        {
            if (switchData != null)
            {
                if (_iconRenderer != null)
                    _iconRenderer.sprite = switchData.mapSprite;
                gameObject.name = switchData.targetLevelSceneName;
                // Optionally update other fields, e.g. description
            }
        }

        /// <summary>
        /// Handles the start of an interaction (shows confirmation menu and switches the level if confirmed).
        /// </summary>
        private void OnCharacterArrived()
        {
            if (switchData == null || string.IsNullOrEmpty(switchData.targetLevelSceneName) || !_isActive)
                return;

            var menuPrefab = _interactionSettings?.LevelSwitchMenuPrefab;
            if (menuPrefab == null)
            {
                Debug.LogError("LevelSwitchMenu prefab not assigned in InteractionSettings!");
                return;
            }
            // Spawn the menu overlay (assume Canvas parent is handled in prefab setup)
            var menuGo = Instantiate(menuPrefab);
            var menu = menuGo.GetComponent<LevelSwitchMenu>();
            if (menu == null)
            {
                Debug.LogError("LevelSwitchMenu component missing on prefab!");
                Destroy(menuGo);
                return;
            }
            // Setup menu with data and callbacks
            menu.Setup(switchData, OnMenuConfirm, OnMenuCancel);
            _isActive = false; // Prevent re-triggering until menu is closed
        
            // Switch input mode to UI only
            InputManager.Instance.SetInputMode(InputMode.UI);
        }

        private async void OnMenuConfirm()
        {
            var progress = new Progress<float>(p => Debug.Log($"Loading progress: {p * 100:F0}%"));
            await SceneManagerService.Instance.SwitchSceneAsync(switchData.targetLevelSceneName, progress);
        }

        private void OnMenuCancel()
        {
            _isActive = true; // Allow interaction again if cancelled
        }
    }
}