using System;
using System.Collections.Generic;
using Bootstrap;
using Core;
using UnityEngine;
using UnityEngine.AddressableAssets;
using UnityEngine.ResourceManagement.AsyncOperations;
using UnityEngine.Playables;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

namespace Cinematics
{
    /// <summary>
    /// Handles loading, playing and unloading cinematics
    /// </summary>
    public class CinematicsManager : MonoBehaviour
    {
        public event System.Action OnCinematicStarted;
        public event System.Action OnCinematicStopped;
        private static CinematicsManager _instance;
        private static bool _isQuitting;
        private Image _cinematicSprites;
        private bool _isCinematicPlaying = false;
        public bool IsCinematicPlaying => _isCinematicPlaying;

        // Dictionary to track addressable handles by PlayableDirector
        private Dictionary<PlayableDirector, AsyncOperationHandle<PlayableAsset>> _addressableHandles 
            = new Dictionary<PlayableDirector, AsyncOperationHandle<PlayableAsset>>();

        /// <summary>
        /// Singleton instance of the CinematicsManager. No longer creates an instance if one doesn't exist.
        /// </summary>
        public static CinematicsManager Instance => _instance;
        
        public PlayableDirector playableDirector;
        
        private void Awake()
        {
            _instance = this;
            
            // Register for post-boot initialization
            BootCompletionService.RegisterInitAction(InitializePostBoot);
        }
        
        private void InitializePostBoot()
        {
            // Initialize any dependencies that require other services to be ready
            // For example, subscribe to SceneManagerService events if needed
            Logging.Debug("[CinematicsManager] Post-boot initialization complete");
        }

        private void OnEnable()
        {
            // Subscribe to application quit event to ensure cleanup
            Application.quitting += OnApplicationQuit;
        }

        private void OnDisable()
        {
            // Unsubscribe from application quit event
            Application.quitting -= OnApplicationQuit;
            
            // Clean up any remaining addressable handles when disabled
            ReleaseAllHandles();
        }

        private void OnApplicationQuit()
        {
            _isQuitting = true;
            ReleaseAllHandles();
        }
        
        /// <summary>
        /// Initializes required components for the CinematicsManager
        /// </summary>
        private void InitializeComponents()
        {
            // Initialize PlayableDirector if not set
            if (playableDirector == null)
            {
                playableDirector = GetComponent<PlayableDirector>();
                
                // If still null, try to add the component
                if (playableDirector == null)
                {
                    playableDirector = gameObject.AddComponent<PlayableDirector>();
                    Debug.Log("[CinematicsManager] Added missing PlayableDirector component");
                }
            }
            
            // Initialize _cinematicSprites if not set
            if (_cinematicSprites == null)
            {
                // First try to find in children
                _cinematicSprites = GetComponentInChildren<Image>(true);
                
                // If still null, create a new UI Image for cinematics
                if (_cinematicSprites == null)
                {
                    Debug.LogWarning("[CinematicsManager] No Image found for cinematics display. Cinematics may not display correctly.");
                }
            }
        }
        
        /// <summary>
        /// Plays a cinematic from an object reference and returns the PlayableDirector playing the timeline
        /// </summary>
        public PlayableDirector PlayCinematic(PlayableAsset assetToPlay)
        {
            // Ensure components are initialized before playing
            InitializeComponents();
            
            if (_cinematicSprites != null)
            {
                _cinematicSprites.enabled = true;
            }
            
            playableDirector.stopped += OnPlayableDirectorStopped;
            playableDirector.Play(assetToPlay);
            Logging.Debug("Playing cinematic " + assetToPlay.name);
            _isCinematicPlaying = true;
            OnCinematicStarted?.Invoke();
            return playableDirector;
        }

        void OnPlayableDirectorStopped(PlayableDirector director)
        {
            _cinematicSprites.enabled = false;
            Logging.Debug("Cinematic stopped!");
            _isCinematicPlaying = false;
            OnCinematicStopped?.Invoke();
            // Release the addressable handle associated with this director
            ReleaseAddressableHandle(director);
        }

        /// <summary>
        /// Loads a playable from an asset path and plays it as a cinematic
        /// </summary>
        public PlayableDirector LoadAndPlayCinematic(string key)
        {
            // Load the asset via addressables
            var handle = Addressables.LoadAssetAsync<PlayableAsset>(key);
            var result = handle.WaitForCompletion();
            
            // Store the handle for later release
            _addressableHandles[playableDirector] = handle;
            
            Logging.Debug($"[CinematicsManager] Loaded addressable cinematic: {key}");
            
            return PlayCinematic(result);
        }

        /// <summary>
        /// Skips the currently playing cinematic if one is active
        /// </summary>
        public void SkipCurrentCinematic()
        {
            if (playableDirector != null && playableDirector.state == PlayState.Playing)
            {
                Logging.Debug("Skipping current cinematic");
                playableDirector.Stop();
            }
        }
        
        /// <summary>
        /// Releases the addressable handle associated with a specific PlayableDirector
        /// </summary>
        private void ReleaseAddressableHandle(PlayableDirector director)
        {
            if (_addressableHandles.TryGetValue(director, out var handle))
            {
                Logging.Debug($"[CinematicsManager] Releasing addressable handle for cinematic");
                Addressables.Release(handle);
                _addressableHandles.Remove(director);
            }
        }
        
        /// <summary>
        /// Releases all active addressable handles
        /// </summary>
        private void ReleaseAllHandles()
        {
            foreach (var handle in _addressableHandles.Values)
            {
                if (handle.IsValid())
                {
                    Addressables.Release(handle);
                }
            }
            _addressableHandles.Clear();
        }
    }
}