using System.Collections.Generic;
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
{
        private static CinematicsManager _instance;
        private static bool _isQuitting;
        private Image cinematicSprites;
        public PlayableAsset cinematicToPlay;

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

        public static CinematicsManager Instance
        {
            get
            {
                if (_instance == null && Application.isPlaying && !_isQuitting)
                {
                    _instance = FindAnyObjectByType<CinematicsManager>();
                    if (_instance == null)
                    {
                        var go = new GameObject("CinematicsManager");
                        _instance = go.AddComponent<CinematicsManager>();
                        // DontDestroyOnLoad(go);
                    }
                }
                return _instance;
            }
        }
        public PlayableDirector playableDirector;

        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()
        {
            ReleaseAllHandles();
        }
        
        /// <summary>
        /// Plays a cinematic from an object reference and returns the PlayableDirector playing the timeline
        /// </summary>
        public PlayableDirector PlayCinematic(PlayableAsset assetToPlay)
        {
            cinematicSprites.enabled = true;
            playableDirector.stopped += OnPlayableDirectorStopped;
            playableDirector.Play(assetToPlay);
            Debug.Log("Playing cinematic " + assetToPlay.name);
            return playableDirector;
        }

        void OnPlayableDirectorStopped(PlayableDirector director)
        {
            cinematicSprites.enabled = false;
            Debug.Log("Cinematic stopped!");
            
            // 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;
            
            Debug.Log($"[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)
            {
                Debug.Log("Skipping current cinematic");
                playableDirector.Stop();
            }
        }

        /// <summary>
        /// Checks if a cinematic is currently playing
        /// </summary>
        public bool IsCinematicPlaying()
        {
            return playableDirector != null && playableDirector.state == PlayState.Playing;
        }
        
        /// <summary>
        /// Releases the addressable handle associated with a specific PlayableDirector
        /// </summary>
        private void ReleaseAddressableHandle(PlayableDirector director)
        {
            if (_addressableHandles.TryGetValue(director, out var handle))
            {
                Debug.Log($"[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();
        }

        private void Start()
        {
            if (!SceneManager.GetActiveScene().name.ToLower().Contains("mainmenu"))
            {
                return;
            }
            
            _instance = this;

            if (!SceneManager.GetActiveScene().name.ToLower().Contains("mainmenu"))
            {
                return;
            }

            playableDirector = GetComponent<PlayableDirector>();
            cinematicSprites = GetComponentInChildren<Image>(true);
            LoadAndPlayCinematic("IntroSequence");
        }
    }
}