using System;
using UdonSharp;
using UnityEngine;
using UnityEngine.Serialization;
using VRC.SDK3.Data;

using UnityEditor;
using VRC.SDKBase;

namespace VRCBoard.Components
{
    
    [UdonBehaviourSyncMode(BehaviourSyncMode.None)]
    public class VRCBoardImage : VRCBoardImageBaseComponent
    {
        [HideInInspector] public int materialIndex;
        
        [HideInInspector] public string[] imageIds = new string[0];
        [HideInInspector] public string[] texturePropertyMappings = new string[0];
        [HideInInspector] public Texture2D[] defaultTextures = new Texture2D[0];
        
        private string _uploaderId = "";
        
        private Renderer _renderer;

        private void Start()
        {
            _renderer = GetComponent<Renderer>();
            OnImageLoaded();
        }

        protected override void OnRegister()
        {
            Debug.Log("Registering image component");
            OnImageLoaded();
        }
        

        

        private void TryGetUploader()
        {
            if (!string.IsNullOrEmpty(_uploaderId)) return;
            
            if (imageIds.Length == 0) return;
            _uploaderId = GetUploader(imageIds[0]);
            
            if (string.IsNullOrEmpty(_uploaderId))
            {
                Debug.LogError("Failed to get uploader ID");
                return;
            }
            for (int i = 0; i < imageIds.Length; i++)
            {
                string imageId = imageIds[i];
                RequestImageLoad(imageId, _uploaderId);
            }

            OnImageLoaded();
        }
        protected override void OnInitialize()
        {
            TryGetUploader();
            OnImageLoaded();
        }
        protected override void OnImageDataUpdate()
        {
            // OnImageLoaded();
        }
        
        protected override void OnSupporterDataUpdate()
        {
            TryGetUploader();
        }

        protected override void OnImageLoaded()
        {
            //Debug.Log("Image loaded VRCBoardImage");

            
            //bool textureSuccess = GetImageAtlasTexture(albedoImageId, _uploaderId, out Texture2D texture, out int atlasPosition, out int atlasSize, out string type1);
            
            MaterialPropertyBlock propertyBlock = new MaterialPropertyBlock();

            for (int i = 0; i < imageIds.Length; i++)
            {
                if (i >= texturePropertyMappings.Length) continue;
                if (i >= defaultTextures.Length) continue;
                
                string propertyName = texturePropertyMappings[i];
                Texture2D texture = manager ? manager.GetTexture2D(_uploaderId, imageIds[i]) : defaultTextures[i];

                if (texture == null)
                {
                    Debug.Log("texture was null, using default texture");
                    texture = defaultTextures[i];
                }
                if (string.IsNullOrEmpty(propertyName)) continue;
                
                if (texture != null) propertyBlock.SetTexture(propertyName, texture);
            }
            
            if (_renderer) _renderer.SetPropertyBlock(propertyBlock,materialIndex);
        }
    }
#if UNITY_EDITOR && !COMPILER_UDONSHARP
    [CustomEditor(typeof(VRCBoardImage), true)]
    public class VRCBoardImageComponentEditor : Editor
    {
        public void OnDisable()
        {
            VRCBoardImage script = (VRCBoardImage)target;
            Renderer renderer = script.GetComponent<Renderer>();
            int materialCount = renderer.sharedMaterials.Length;
            MaterialPropertyBlock propertyBlock = new MaterialPropertyBlock();
            for (int i = 0; i < materialCount; i++)
            {
                renderer.SetPropertyBlock(propertyBlock, i);
            }
        }

        public override void OnInspectorGUI()
        {
            base.OnInspectorGUI();
            
            VRCBoardImage script = (VRCBoardImage)target;
            Renderer renderer = script.GetComponent<Renderer>();
            
            if (renderer == null)
            {
                EditorGUILayout.HelpBox("No renderer, did you intend to use material override?", MessageType.Warning);
                return;
            }
            
            
            bool equals = 
                Equals(script.imageIds.Length, script.defaultTextures.Length) &&
                Equals(script.imageIds.Length, script.defaultTextures.Length);

            
            EditorGUILayout.Separator();

            int materialCount = renderer.sharedMaterials.Length;
            int newMaterialIndex = materialCount > 1
                ? EditorGUILayout.IntSlider("Material Slot", script.materialIndex, 0, materialCount - 1) : 0;
            newMaterialIndex = Mathf.Clamp(newMaterialIndex, 0, materialCount);
            if (newMaterialIndex != script.materialIndex)
            {
                script.materialIndex = newMaterialIndex;
                OnDisable();
                EditorUtility.SetDirty(script);
            }

            if (renderer.sharedMaterials.Length == 0)
            {
                EditorGUILayout.HelpBox("Material has no material slots.", MessageType.Error);
                return;
            }
            
            Material material = renderer.sharedMaterials[newMaterialIndex];

            if (material == null)
            {
                EditorGUILayout.HelpBox("No material assigned to material slot ("+newMaterialIndex+")", MessageType.Error);
                return;
            }
            
            string[] materialPropertyNames = material.GetPropertyNames(MaterialPropertyType.Texture);
            
            GUILayout.BeginVertical("Images", "window");
            int newSize = script.imageIds.Length;
            GUILayout.BeginHorizontal();
            if (GUILayout.Button("+"))
            {
                newSize++;
            }

            if (GUILayout.Button("-"))
            {
                newSize--;
            }
            GUILayout.EndHorizontal();
           
            
            
            if (newSize != script.imageIds.Length || !equals)
            {
                Debug.Log("Resized arrays to"+newSize);
                Array.Resize(ref script.imageIds, newSize);
                Array.Resize(ref script.texturePropertyMappings, newSize);
                Array.Resize(ref script.defaultTextures, newSize);
                EditorUtility.SetDirty(script);
            }
            MaterialPropertyBlock propertyBlock = new MaterialPropertyBlock();
            for (int i = 0; i < script.imageIds.Length; i++)
            {
                EditorGUILayout.Space();
                GUILayout.BeginVertical("Image "+i, "window");
                string imageId = script.imageIds[i];
                string propertyName = script.texturePropertyMappings[i];
                Texture2D defaultImage = script.defaultTextures[i];
                
                imageId = EditorGUILayout.TextField("Image Id:", imageId);
                
                
                int selectedIndex = Array.IndexOf(materialPropertyNames, propertyName);
                selectedIndex = EditorGUILayout.Popup("Material Property:", selectedIndex, materialPropertyNames);
                
                bool propertyExists = Array.Exists(materialPropertyNames, materialProperty => materialProperty == propertyName);

                if (propertyExists)
                {
                    
                    EditorGUILayout.BeginHorizontal();
                    EditorGUILayout.LabelField("Default Texture:");
                    defaultImage = EditorGUILayout.ObjectField(defaultImage, typeof(Texture2D), false) as Texture2D;
                    EditorGUILayout.EndHorizontal(); 
                    if (defaultImage != null) propertyBlock.SetTexture(propertyName, defaultImage);
                }
                
                if (script.defaultTextures[i] != defaultImage)
                {
                    script.defaultTextures[i] = defaultImage;
                    EditorUtility.SetDirty(script);
                }

                if (script.imageIds[i] != imageId)
                {
                    script.imageIds[i] = imageId;
                    EditorUtility.SetDirty(script);
                }

                if (selectedIndex >= 0 && selectedIndex < materialPropertyNames.Length && script.texturePropertyMappings[i] != materialPropertyNames[selectedIndex])
                {
                    script.texturePropertyMappings[i] = materialPropertyNames[selectedIndex];
                    EditorUtility.SetDirty(script);
                }
                GUILayout.EndVertical();
            }
            if (renderer && !Application.isPlaying) renderer.SetPropertyBlock(propertyBlock,script.materialIndex);
            EditorGUILayout.EndVertical();
            
        }
    }
#endif
}