using System.Collections.Generic;
using System.Linq;
using CardSystem.UI.Component;
using Core;
using Minigames.StatueDressup.Controllers;
using Minigames.StatueDressup.PhotoGallery;
using UnityEngine;
using Utils;

namespace CardSystem.Controllers
{
    /// <summary>
    /// Controller for managing photo slots across album pages.
    /// Discovers all AlbumPhotoSlot prefabs in scene, groups by CaptureType,
    /// and populates with latest photos from PhotoManager.
    /// </summary>
    public class AlbumPhotoPageController
    {
        private readonly GameObject _backdrop;
        private readonly Transform _enlargedContainer;
        private readonly float _animationDuration;
        
        private Dictionary<CaptureType, List<AlbumPhotoSlot>> _slotsByType;
        private Dictionary<AlbumPhotoSlot, string> _photoAssignments; // Maps each slot to its assigned photoId
        private PhotoEnlargeController _enlargeController;
        private bool _isInitialized;
        
        public bool IsInitialized => _isInitialized;
        
        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="backdrop">Backdrop for photo enlargement</param>
        /// <param name="enlargedContainer">Container for enlarged photos</param>
        /// <param name="animationDuration">Duration for enlarge/shrink animations</param>
        public AlbumPhotoPageController(GameObject backdrop, Transform enlargedContainer, float animationDuration = 0.3f)
        {
            _backdrop = backdrop;
            _enlargedContainer = enlargedContainer;
            _animationDuration = animationDuration;
            
            // Initialize data structures
            _photoAssignments = new Dictionary<AlbumPhotoSlot, string>();
            
            // Initialize enlarge controller
            _enlargeController = new PhotoEnlargeController(backdrop, enlargedContainer, animationDuration);
            
            Logging.Debug("[AlbumPhotoPageController] Controller created");
        }
        
        /// <summary>
        /// Discover all photo slots in scene and populate them with latest photos
        /// </summary>
        public void Initialize()
        {
            Logging.Debug("[AlbumPhotoPageController] Initialize() called");
            
            if (_isInitialized)
            {
                Logging.Warning("[AlbumPhotoPageController] Already initialized");
                return;
            }
            
            // Find all photo slots in scene
            AlbumPhotoSlot[] allSlots = Object.FindObjectsByType<AlbumPhotoSlot>(FindObjectsInactive.Include, FindObjectsSortMode.None);
            
            Logging.Debug($"[AlbumPhotoPageController] Found {(allSlots != null ? allSlots.Length : 0)} AlbumPhotoSlot components in scene");
            
            if (allSlots == null || allSlots.Length == 0)
            {
                Logging.Warning("[AlbumPhotoPageController] No AlbumPhotoSlot components found in scene");
                _isInitialized = true;
                return;
            }
            
            // Group slots by CaptureType
            _slotsByType = new Dictionary<CaptureType, List<AlbumPhotoSlot>>();
            
            foreach (var slot in allSlots)
            {
                Logging.Debug($"[AlbumPhotoPageController] Processing slot: {slot.name}, CaptureType: {slot.CaptureType}");
                
                if (!_slotsByType.ContainsKey(slot.CaptureType))
                {
                    _slotsByType[slot.CaptureType] = new List<AlbumPhotoSlot>();
                }
                
                _slotsByType[slot.CaptureType].Add(slot);
                
                // Initialize the slot with this controller
                slot.Initialize(this);
            }
            
            Logging.Debug($"[AlbumPhotoPageController] Found {allSlots.Length} photo slots across {_slotsByType.Count} capture types");
            
            // Log slot counts per type
            foreach (var kvp in _slotsByType)
            {
                Logging.Debug($"[AlbumPhotoPageController]   {kvp.Key}: {kvp.Value.Count} slots");
            }
            
            // Prepare photo assignments (but don't populate yet - slots will request when they become active)
            Logging.Debug("[AlbumPhotoPageController] Starting PreparePhotoAssignments()");
            PreparePhotoAssignments();
            
            _isInitialized = true;
            Logging.Debug("[AlbumPhotoPageController] Initialize() complete");
        }
        
        /// <summary>
        /// Prepare photo assignments for all discovered slots.
        /// Slots will request their assigned photo when they become active.
        /// </summary>
        private void PreparePhotoAssignments()
        {
            _photoAssignments.Clear();
            
            foreach (var kvp in _slotsByType)
            {
                CaptureType captureType = kvp.Key;
                List<AlbumPhotoSlot> slots = kvp.Value;
                
                // Get latest photos for this capture type
                int slotCount = slots.Count;
                List<string> photoIds = PhotoManager.GetPhotoIds(captureType, slotCount);
                
                Logging.Debug($"[AlbumPhotoPageController] Preparing assignments for {slotCount} slots of {captureType} with {photoIds.Count} photos");
                
                // Build assignment map
                for (int i = 0; i < slots.Count; i++)
                {
                    string photoId = (i < photoIds.Count) ? photoIds[i] : null;
                    _photoAssignments[slots[i]] = photoId;
                    
                    if (photoId != null)
                    {
                        Logging.Debug($"[AlbumPhotoPageController]   Slot {i} ({slots[i].name}) -> {photoId}");
                    }
                    else
                    {
                        Logging.Debug($"[AlbumPhotoPageController]   Slot {i} ({slots[i].name}) -> (no photo)");
                    }
                }
            }
            
            Logging.Debug($"[AlbumPhotoPageController] Prepared {_photoAssignments.Count} photo assignments");
        }
        
        /// <summary>
        /// Get the assigned photo ID for a specific slot.
        /// Called by slots when they become active.
        /// </summary>
        public string GetAssignedPhotoId(AlbumPhotoSlot slot)
        {
            if (slot == null || _photoAssignments == null)
            {
                return null;
            }
            
            if (_photoAssignments.TryGetValue(slot, out string photoId))
            {
                return photoId;
            }
            
            Logging.Warning($"[AlbumPhotoPageController] Slot {slot.name} not found in assignments");
            return null;
        }
        
        /// <summary>
        /// Refresh photos for a specific capture type (call after new photo is taken)
        /// </summary>
        public void RefreshPhotosForType(CaptureType captureType)
        {
            if (!_isInitialized || !_slotsByType.ContainsKey(captureType))
            {
                return;
            }
            
            List<AlbumPhotoSlot> slots = _slotsByType[captureType];
            
            // Clear existing slots
            foreach (var slot in slots)
            {
                slot.Clear();
            }
            
            // Get latest photos and rebuild assignments
            int slotCount = slots.Count;
            List<string> photoIds = PhotoManager.GetPhotoIds(captureType, slotCount);
            
            Logging.Debug($"[AlbumPhotoPageController] Refreshing assignments for {slotCount} slots of {captureType} with {photoIds.Count} photos");
            
            // Update assignments
            for (int i = 0; i < slots.Count; i++)
            {
                string photoId = (i < photoIds.Count) ? photoIds[i] : null;
                _photoAssignments[slots[i]] = photoId;
            }
            
            // Trigger slots to reload (they will request their new assignment when they become active)
            foreach (var slot in slots)
            {
                if (slot.gameObject.activeInHierarchy)
                {
                    // If slot is currently active, immediately populate with new assignment
                    slot.PopulateWithPhoto(GetAssignedPhotoId(slot));
                }
            }
        }
        
        /// <summary>
        /// Refresh all photo slots (call after album is opened to show latest photos)
        /// </summary>
        public void RefreshAllPhotos()
        {
            if (!_isInitialized)
            {
                return;
            }
            
            foreach (var captureType in _slotsByType.Keys.ToList())
            {
                RefreshPhotosForType(captureType);
            }
            
            Logging.Debug("[AlbumPhotoPageController] All photos refreshed");
        }
        
        /// <summary>
        /// Enlarge a photo (called by AlbumPhotoSlot)
        /// </summary>
        public void EnlargePhoto(AlbumPhotoSlot slot, Texture2D fullSizeTexture)
        {
            if (_enlargeController == null)
            {
                Logging.Error("[AlbumPhotoPageController] Enlarge controller not initialized");
                return;
            }
            
            // If already enlarged, shrink it
            if (_enlargeController.IsPhotoEnlarged)
            {
                _enlargeController.ShrinkPhoto();
                return;
            }
            
            if (fullSizeTexture == null)
            {
                Logging.Error($"[AlbumPhotoPageController] Cannot enlarge null texture for slot {slot.PhotoId}");
                return;
            }
            
            Logging.Debug($"[AlbumPhotoPageController] Enlarging photo: {slot.PhotoId} from {slot.CaptureType}");
            
            // Default enlarged scale (can be made configurable)
            float enlargedScale = 2.5f;
            
            // Enlarge using the controller
            _enlargeController.EnlargePhoto(slot, slot.gameObject, fullSizeTexture, enlargedScale);
        }
        
        /// <summary>
        /// Get photo count for a specific capture type
        /// </summary>
        public int GetPhotoCount(CaptureType captureType)
        {
            return PhotoManager.GetPhotoCount(captureType);
        }
        
        /// <summary>
        /// Get slot count for a specific capture type
        /// </summary>
        public int GetSlotCount(CaptureType captureType)
        {
            if (!_isInitialized || !_slotsByType.ContainsKey(captureType))
            {
                return 0;
            }
            
            return _slotsByType[captureType].Count;
        }
        
        /// <summary>
        /// Cleanup when album is closed
        /// </summary>
        public void Cleanup()
        {
            if (_enlargeController != null)
            {
                _enlargeController.Cleanup();
            }
            
            // Clear all slots
            if (_slotsByType != null)
            {
                foreach (var slots in _slotsByType.Values)
                {
                    foreach (var slot in slots)
                    {
                        if (slot != null)
                        {
                            slot.Clear();
                        }
                    }
                }
            }
            
            Logging.Debug("[AlbumPhotoPageController] Cleanup complete");
        }
    }
}