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

using UnityEditor;

namespace VRCBoard.Components
{
    
    [UdonBehaviourSyncMode(BehaviourSyncMode.None)]
    public class VRCBoardImage : VRCBoardBaseComponent
    {
        [Header("Uploader ID (only applies to images of 'shared' or 'instance' type)")]
        public string uploaderIdOverride;
        
        [Header("Material Override (Optional, if set the properties are applied globally to all renderers using the material)")]
        public Material materialOverride;
        
        [HideInInspector] public string[] imageIds = new string[0];
        [HideInInspector] public string[] texturePropertyMappings = new string[0];
        [HideInInspector] public Texture2D[] defaultTextures = new Texture2D[0];

        private string _mainType = "";
        private string _uploaderId = "";
        
        protected override void OnRegister()
        {
            Debug.Log("Registering image component");
        }
        

        private string GetUploader()
        {
            string uploaderId = "";
            if (string.IsNullOrEmpty(uploaderIdOverride) && imageIds.Length > 0)
            {
                string firstImageID = imageIds[0];
                GetImageAtlasTexture(firstImageID, null, out Texture2D albedoTexture, out int albedoAtlasPosition, out int albedoAtlasSize, out string albedoType);
                if (albedoType == null)
                {
                    Debug.LogError("Failed to get image type for albedo image");
                    return "";
                }
                _mainType = albedoType;
                if (_mainType == "shared")
                {
                    uploaderId = GetRandomUploader(firstImageID);
                }
                else
                {
                    DataDictionary ownerInfo = manager.GetSupporterDataFromPlayer(manager.instanceOwner);
                    if (ownerInfo == null)
                    {
                        Debug.LogWarning("Failed to get owner info, user has likely not linked their account.");
                        return "";
                    }
                    bool ownerSuccess = ownerInfo.TryGetValue("id", out DataToken ownerToken);
                    if (!ownerSuccess || ownerToken.TokenType != TokenType.String)
                    {
                        Debug.LogWarning("Failed to get owner ID from owner info.");
                        return "";
                    }
                    uploaderId = ownerToken.String;
                }
                
                Debug.Log("image uploader: " + uploaderId);
            } else
            {
                uploaderId = uploaderIdOverride;
            }
            return uploaderId;
        }

        private void TryGetUploader()
        {
            if (!string.IsNullOrEmpty(_uploaderId)) return;
            _uploaderId = GetUploader();
            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);
            }
        }
        protected override void OnInitialize()
        {
            TryGetUploader();
        }
        protected override void OnImageDataUpdate()
        {
            TryGetUploader();
        }
        
        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;
                
                string propertyName = texturePropertyMappings[i];
                Texture2D texture = manager.GetTexture2D(_uploaderId, imageIds[i]);

                if (texture == null)
                {
                    texture = defaultTextures[i];
                    if (texture == null) continue;
                }
                if (string.IsNullOrEmpty(propertyName)) continue;
                
                propertyBlock.SetTexture(propertyName, texture);
                if (materialOverride != null) materialOverride.SetTexture(propertyName, texture);
            }
            
            
            GetComponent<Renderer>().SetPropertyBlock(propertyBlock);
        }
    }
#if UNITY_EDITOR && !COMPILER_UDONSHARP
    [CustomEditor(typeof(VRCBoardImage), true)]
    public class VRCBoardImageComponentEditor : Editor
    {
        public override void OnInspectorGUI()
        {
            VRCBoardImage script = (VRCBoardImage)target;
            
            Renderer renderer = script.GetComponent<Renderer>();
            Material material = renderer.sharedMaterial;
            if (script.materialOverride)
            {
                EditorGUILayout.HelpBox("Material override enabled", MessageType.Info);
                material = script.materialOverride;
            }
            string[] materialPropertyNames = material.GetPropertyNames(MaterialPropertyType.Texture);

            base.OnInspectorGUI();

            bool equals = 
                Equals(script.imageIds.Length, script.defaultTextures.Length) &&
                Equals(script.imageIds.Length, script.defaultTextures.Length);

            
            EditorGUILayout.Separator();
            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.materialOverride != null) script.materialOverride.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();
            }
            
            renderer.SetPropertyBlock(propertyBlock);
            EditorGUILayout.EndHorizontal(); 
            
        }
    }
#endif
}