using System.Collections;
using System.Collections.Generic;
using Sirenix.OdinInspector;
using UnityEngine;
//using UnityEngine.InputSystem.UI;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;
using UnityEngine.Video;

namespace Beyond
{
    public class ScrollBase : MonoBehaviour
    {
        /// <summary>
        /// if true, canvas should be displayed directly on the screen
        /// </summary>
        [SerializeField] private bool m_DirectDisplay;
        /// <summary>
        /// Input that is used to pass touch/click events from/to 3D scroll
        /// </summary>
        public UVInputModule m_uvInputModule;
#if USE_NEW_INPUT        
        /// <summary>
        /// Standard unity input that needs to be switched off while scroll is on
        /// </summary>
        public InputSystemUIInputModule m_inputSystemUIInputModule;
#endif
        /// <summary>
        /// Animates scroll opening and closing
        /// </summary>
        public Animator m_scrollAnimator;
        /// <summary>
        /// Canvas used to render 2D scroll elements
        /// </summary>
        public Canvas m_canvas;
        public Camera m_CanvasCamera;
        public Camera m_ScrollCamera;


        public bool m_burnIn = false;
        public bool m_isOpen = false;
        public float m_burnInDelay = 1f;
        public float m_moveInTime = 1f;
        public float m_burnInTime = 1f;
        public float m_burnThreshold;
        [Tooltip("Motion curve for first move in")]
        public AnimationCurve m_MotionCurve;
        public AnimationCurve m_BurnInCurve;
        public Vector3 m_startPositionShift = new Vector3(-3f, 0f, 0f);
        private Vector3 m_startPosition;
        private Vector3 m_endPosition;
        private Transform m_scrollTransform;
        public Material m_scrollMat;

        private Volume m_volume;
        public VolumeProfile m_volumeProfile;
        private VolumeProfile m_defaultProfile;
        void ActivateObjects(bool activate)
        {
            m_canvas.gameObject.SetActive(activate);
            if (!m_DirectDisplay)
            {
                m_CanvasCamera.gameObject.SetActive(activate);
                m_ScrollCamera.gameObject.SetActive(activate);
            }

            if (m_volume && m_volumeProfile != null)
                m_volume.profile = activate ? m_volumeProfile : m_defaultProfile;
        }

        void BlockUI(bool block)
        {
            HideUI.InvokeSetActiveUI(!block);
            if (m_uvInputModule != null)
            {
                m_uvInputModule.enabled = block;
                
            }
#if USE_NEW_INPUT        
            if (m_inputSystemUIInputModule)
                m_inputSystemUIInputModule.enabled = !block;
#endif
        }

        virtual protected void OnScrollOpened()
        {
            
        }
        
        virtual protected void OnScrollClosed()
        {
            
        }

        IEnumerator OpenAndBurnIn()
        {
            BlockUI(true);
            ActivateObjects(true);
            SetBurnInTh(0f);

            float time = 0f;
            while (time < m_moveInTime)
            {
                time += Time.deltaTime;
                float val = m_MotionCurve.Evaluate(time / m_moveInTime);
                m_scrollTransform.position = m_startPosition - m_startPositionShift * val;
                yield return null;
            }

            m_scrollAnimator.SetBool("Open", true);
            yield return new WaitForSeconds(m_burnInDelay);
            time = 0f;
            while (time < m_burnInTime)
            {
                time += Time.deltaTime;
                float val = m_BurnInCurve.Evaluate(time / m_burnInTime);
                SetBurnInTh(val);
                yield return null;
            }
            m_isOpen = true;
            OnScrollOpened();
            yield return true;
        }

        IEnumerator CloseAndBurnOut()
        {
            float time = 0f;
            m_isOpen = false;
            while (time < m_burnInTime)
            {
                time += Time.deltaTime;
                float val = m_BurnInCurve.Evaluate(1.0f - time / m_burnInTime);
                SetBurnInTh(val);
                yield return null;
            }

            m_scrollAnimator.SetBool("Open", false);
            time = 0f;
            yield return new WaitForSeconds(m_burnInDelay);

            while (time < m_moveInTime)
            {
                time += Time.deltaTime;
                float val = m_MotionCurve.Evaluate(1.0f - time / m_moveInTime);
                m_scrollTransform.position = m_startPosition - m_startPositionShift * val;
                yield return null;
            }

            BlockUI(false);
            ActivateObjects(false);

            OnScrollClosed();
            
            yield return true;
        }

        void SetBurnInTh(float burnTh)
        {
            m_scrollMat.SetFloat("_Threshold", burnTh);
        }

        protected virtual void Awake()
        {
            if (!m_scrollAnimator)
            {
                m_scrollAnimator = transform.GetComponentInChildren<Animator>();
            }
            m_scrollAnimator.SetBool("Open", false);
            m_scrollTransform = m_scrollAnimator.transform.parent;
            if (m_scrollMat == null)
                m_scrollMat = m_scrollAnimator.transform.GetComponentInChildren<Renderer>().material;
            if (m_volume == null)
                m_volume = GameObject.FindObjectOfType<Volume>();
            if (m_volume != null)
                m_defaultProfile = m_volume.profile;
            if (m_uvInputModule != null)
                m_uvInputModule.forceModuleActive = true;
        }
        [Button]
        public void OpenCloseScroll(bool open)
        {
            if (open)
                StartCoroutine(OpenAndBurnIn());
            else
                StartCoroutine(CloseAndBurnOut());
        }

       

        protected virtual void Start()
        {
            m_endPosition = m_scrollTransform.position;
            m_startPosition = m_endPosition + m_startPositionShift;
            m_scrollTransform.position = m_startPosition;
            var camera = Camera.main;
            if (camera != null)
            {
                var cameraData = camera.GetUniversalAdditionalCameraData();
                if (cameraData.cameraStack.Count == 0)
                    cameraData.cameraStack.Add(m_ScrollCamera);
            }

            if (m_DirectDisplay)
            {
                m_ScrollCamera.gameObject.SetActive(false);
                m_CanvasCamera.gameObject.SetActive(false);
                m_canvas.renderMode = RenderMode.ScreenSpaceOverlay;
            }
            
            //OpenCloseScroll(true);
            //StartCoroutine(DisplayPages());
            //ActivateObjects(false);
        }

       
    }
}