using System;
using UnityEngine;
using UnityEngine.Rendering.Universal;

namespace PhxhSDK
{
    public class CameraManager : Singlenton<CameraManager>, IInitable
    {
        public RenderTexture DefaultRenderTarget { get; set; }

        public event Action<Camera> AfterSwitchMainCamera;
        
        private Camera _mainCamera;

        private Camera _lastMainCamera;
        
        public Camera MainCamera
        {
            get
            {
                if (_mainCamera == null)
                {
                    _mainCamera = Camera.main;
                }

                return _mainCamera;
            }
        }

        public Camera UICamera
        {
            get { return UIRoot.Instance.UICamera; }
        }

        public Camera SkillCamera { get; private set; }

        public Camera CreateCamera(string name, string tag = null)
        {
            var go = new GameObject(name);
            var camera = go.AddComponent<Camera>();
            if (tag != null)
            {
                camera.tag = tag; 
            }
            return camera;
        }
        public void DestroyCamera(Camera camera)
        {
            if (camera != null)
            {
                GameObject.Destroy(camera.gameObject);
            }
        }

        public void ReRenderAll()
        {
            foreach (var c in Camera.allCameras)
            {
                var oldEnabled = c.enabled;
                c.enabled = true;
                c.Render();
                c.enabled = oldEnabled;
            }
        }

        public void Init()
        {
            if (MainCamera == null)
            {
                CreateCamera("Main Camera", "MainCamera");
            }
            if (MainCamera != null)
            {
                GameObject.DontDestroyOnLoad(MainCamera.gameObject);
            }

            SkillCamera = GameObject.Find("SkillCamera").GetComponent<Camera>();
        }

        public void SetMainCameraActive(bool isActive)
        {
            _mainCamera?.gameObject.SetActive(isActive);
        }

        public void SwitchMainCamera(Camera camera)
        {
            if (camera == null || _mainCamera == camera)
                return;
            _lastMainCamera = _mainCamera;
            _mainCamera = camera;
            
            _mainCamera.gameObject.SetActive(true);
            _mainCamera.targetTexture = DefaultRenderTarget;
            AfterSwitchMainCamera?.Invoke(_mainCamera);
            
            if(_lastMainCamera == null)
                return;
            _lastMainCamera.gameObject.SetActive(false);
        }

        public void RevertMainCamera()
        {
            SwitchMainCamera(_lastMainCamera);
        }
        
        // public void AddCameraStack(Camera camera)
        // {
        //     if(camera == null)
        //         return;
        //     var additionalData = camera.GetComponent<UniversalAdditionalCameraData>();
        //     additionalData.cameraStack.Clear();
        //     additionalData.cameraStack.Add(UICamera);
        //     additionalData.cameraStack.Add(SkillCamera);
        // }
        
        public void Release()
        {
            
        }
    }
}