using System;
using System.Collections.Generic;
using System.Linq;
using Code.Infrastructure.Configs;
using Code.Infrastructure.EventBus;
using Cysharp.Threading.Tasks;
using Unity.Cinemachine;
using UnityEngine;
using UnityEngine.AddressableAssets;
using UnityEngine.ResourceManagement.AsyncOperations;
using Object = UnityEngine.Object;

namespace Code.Infrastructure.Camera
{
    public class CameraFactory : IDisposable
    {
        private AsyncOperationHandle<GameCameraConfig> _configHandle;
        private GameCameraConfig _config;
        private AssetReference _gameCameraConfigReference;

        private AsyncOperationHandle<IList<CameraSettingsConfig>> _settingsConfigsHandle;
        private Dictionary<CameraMode, CameraSettingsConfig> _settingsConfigs;
        private string _cameraConfigsLabel;

        private EventBus.EventBus _eventBus;
        private UnityEngine.Camera _camera;
        
        private Dictionary<CameraMode, CinemachineCamera> _cinemachines = new();

        public CameraFactory(IConfigLocator configLocator, EventBus.EventBus eventBus)
        {
            _gameCameraConfigReference = configLocator.TryGetConfigAssetReference<GameCameraConfig>();
            _cameraConfigsLabel = configLocator.TryGetManyConfigAssetReferences<CameraSettingsConfig>();

            _eventBus = eventBus;
        }

        public async UniTaskVoid CreateCameraStateMachine(CameraStateMachine stateMachine)
        {
            _settingsConfigsHandle = Addressables
                .LoadAssetsAsync<CameraSettingsConfig>(_cameraConfigsLabel, null, Addressables.MergeMode.Union);
            await _settingsConfigsHandle.ToUniTask();
            _settingsConfigs = _settingsConfigsHandle.Result.ToDictionary(x => x.cameraMode);
 
            _configHandle = Addressables.LoadAssetAsync<GameCameraConfig>(_gameCameraConfigReference);
            await _configHandle.ToUniTask();
            _config = _configHandle.Result;

            var cameraObject = await Addressables.InstantiateAsync(_config.Camera).ToUniTask();
            _camera = cameraObject.GetComponent<UnityEngine.Camera>();

            cameraObject.GetComponent<CameraStateMachineRunner>().StateMachine = stateMachine;
            Object.DontDestroyOnLoad(cameraObject);

            _eventBus.RaiseEvent<ICameraInitializedHandle>(x => x.CameraInitialized(new(_camera, _settingsConfigs)));
        }

        public async UniTaskVoid LoadCinemachineCamera(CameraMode cameraMode)
        {
            var cinemachine = await Addressables.InstantiateAsync(_settingsConfigs[cameraMode].cinemachineCamera);
            Object.DontDestroyOnLoad(cinemachine);
            _cinemachines[cameraMode] = cinemachine.GetComponent<CinemachineCamera>();
            _eventBus.RaiseEvent<ICinematicMachineHandle>(x=> x.CinemachineLoaded(_cinemachines[cameraMode]));
        }

        public CinemachineCamera GetCinematicCamera(CameraMode cameraMode) => _cinemachines[cameraMode];

        public void ReleaseCinemachineCamera(CameraMode cameraMode)
        {
            Addressables.Release(_cinemachines[cameraMode].gameObject);
        }
        public void Dispose()
        {
            Addressables.Release(_configHandle);
            Addressables.Release(_settingsConfigsHandle);
            Addressables.ReleaseInstance(_camera.gameObject);
        }
    }

    public interface ICinematicMachineHandle : IGlobalSubscriber
    {
        void CinemachineLoaded(CinemachineCamera cinemachineCamera);
    }
}