using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using Unity.VisualScripting;
using UnityEditor;
using UnityEditor.Recorder;
using UnityEditor.Recorder.Input;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Windows.WebCam;

public class ShaderManiuplation : MonoBehaviour
{
    public enum EquilateralDirection
    {
        Forward,
        Backwards,
        Left,
        Right
    }

    public enum ProjectionType
    {
        Cropped,
        CroppedFOV,
        Squeeze,
        Gnomic
    }

    List<Shader> m_ShaderList = new List<Shader>();
    Material mat;
    public EquilateralDirection m_Direction = EquilateralDirection.Backwards;
    public ProjectionType m_ProjectionType;
    bool m_Squeeze = false;
    bool m_Gnomic = true;
    bool m_Cropped = false;
    bool m_CroppedFOV = false;
    public bool m_SideViewToggle = true;
    GameObject m_CubeMapPrefab = null;

    // Game View Parameters
    Type gameView;
    PropertyInfo selectedSizeIndex;
    EditorWindow window;


    private void OnEnable()
    {
        SetupEditorSettings();
        SetupMatShaders();
    }

    // Update is called once per frame
    void Update()
    {
        UpdateRotation(m_Direction);
    }



    void UpdateRotation(EquilateralDirection direction)
    {
        if(m_Squeeze)
        {
            // Change Resolution & Set Y
            ChangeGameViewResolution(21);
            mat.SetFloat("_EquiRotationY", 0.5f);
            //m_CubeMapPrefab.transform.position = new Vector3(m_CubeMapPrefab.transform.position.x, 0.5f, m_CubeMapPrefab.transform.position.z);
            switch (direction)
            {
                case EquilateralDirection.Forward:
                    mat.SetFloat("_EquiRotation", 1f);
                    break;
                case EquilateralDirection.Left:
                    mat.SetFloat("_EquiRotation", 2f);
                    break;
                case EquilateralDirection.Backwards:
                    mat.SetFloat("_EquiRotation", 3f);
                    break;
                case EquilateralDirection.Right:
                    mat.SetFloat("_EquiRotation", 4f);
                    break;
            }
        }
        else if(m_Cropped)
        {
            ChangeGameViewResolution(21);
            //mat.SetFloat("_EquiRotationY", 3.5f);
            ////m_CubeMapPrefab.transform.position = new Vector3(m_CubeMapPrefab.transform.position.x, 0.5f, m_CubeMapPrefab.transform.position.z);
            //switch (direction)
            //{
            //    case EquilateralDirection.Forward:
            //        mat.SetFloat("_EquiRotation", 0.5f);
            //        break;
            //    case EquilateralDirection.Left:
            //        mat.SetFloat("_EquiRotation", 1f);
            //        break;
            //    case EquilateralDirection.Backwards:
            //        mat.SetFloat("_EquiRotation", 1.5f);
            //        break;
            //    case EquilateralDirection.Right:
            //        mat.SetFloat("_EquiRotation", 2f);
            //        break;
            //}
        }
        else if(m_Gnomic)
        {
            switch (direction)
            {
                case EquilateralDirection.Forward:
                    mat.SetFloat("_EquiRotation", 0f);
                    break;
                case EquilateralDirection.Left:
                    mat.SetFloat("_EquiRotation", 0.25f);
                    break;
                case EquilateralDirection.Backwards:
                    mat.SetFloat("_EquiRotation", 0.5f);
                    break;
                case EquilateralDirection.Right:
                    mat.SetFloat("_EquiRotation", 0.75f);
                    break;
            }

            if (m_SideViewToggle)
            {
                // Set short wall FOV settings (height = 0.5, fovx = 0.9, fovy = 0.3)
                mat.SetFloat("_FOVScale_X", 0.9f);
                mat.SetFloat("_FOVScale_Y", 0.3f);
                mat.SetFloat("_EquiRotationY", 5.23f);
                //m_CubeMapPrefab.transform.position = new Vector3(m_CubeMapPrefab.transform.position.x, 0.5f, m_CubeMapPrefab.transform.position.z);
                ChangeGameViewResolution(29);
            }
            else if (!m_SideViewToggle)
            {
                // Set long wall FOV settings (height = 0.75, fovx = 1.5, fovy = 0.2)
                mat.SetFloat("_FOVScale_X", 1.5f);
                mat.SetFloat("_FOVScale_Y", 0.2f);
                mat.SetFloat("_EquiRotationY", 5.13f);
                //m_CubeMapPrefab.transform.position = new Vector3(m_CubeMapPrefab.transform.position.x, 0.8f, m_CubeMapPrefab.transform.position.z);
                ChangeGameViewResolution(28);
            }
        }
            
    }

    void UpdateProjectionType()
    {
        if(m_ShaderList != null && m_ShaderList.Count > 0)
        {
            if (m_ProjectionType == ProjectionType.Squeeze)
            {
                mat.shader = m_ShaderList[1];
                m_Squeeze = true;
                m_Gnomic = false;
                m_Cropped = false;
            }
            else if(m_ProjectionType == ProjectionType.Cropped)
            {
                mat.shader = m_ShaderList[0];
                m_Squeeze = false;
                m_Gnomic = false;
                m_Cropped = true;
            }
            else if (m_ProjectionType == ProjectionType.Gnomic)
            {
                mat.shader = m_ShaderList[2];
                m_Squeeze = false;
                m_Cropped = false;
                m_Gnomic = true;
            }
        }
    }

    private void OnValidate()
    {
        UpdateProjectionType();
    }

    void ChangeGameViewResolution(int index)
    {
        selectedSizeIndex.SetValue(window, index, null);
    }

    private void SetupEditorSettings()
    {
        gameView = typeof(Editor).Assembly.GetType("UnityEditor.GameView");
        selectedSizeIndex = gameView.GetProperty("selectedSizeIndex", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
        window = EditorWindow.GetWindow(gameView);
    }

    private void SetupMatShaders()
    {
        mat = this.GetComponent<RawImage>().material;
        m_ShaderList.Add(Shader.Find("Conversion/CubemapToEquirectangularSqueeze"));
        m_ShaderList.Add(Shader.Find("Conversion/CubemapToEquirectangularGnomic"));
        mat.shader = m_ShaderList[1];
        m_CubeMapPrefab = GameObject.Find("CubemapCamera");
    }

    public void SetProjection(string projection) 
    {

        switch(projection)
        {
            case "Gnomic":
                m_Gnomic = true;
                m_Squeeze = false;
                m_Cropped = false;
                m_CroppedFOV = false;
                break;
            case "Squeeze":
                m_Squeeze = true;
                m_Cropped = false;
                m_Gnomic = false;
                m_CroppedFOV = false;
                break;
            case "Cropped":
                m_Cropped = true;
                m_Squeeze = false;
                m_Gnomic = false;
                m_CroppedFOV = false;
                break;
            case "CroppedFOV":
                m_Cropped = false;
                m_Squeeze = false;
                m_Gnomic = false;
                m_CroppedFOV = true;
                break;
        }

        UpdateRotation(m_Direction);
    }


}