using System;
using JetBrains.Annotations;
using UdonSharp;
using UnityEngine;
using UnityEngine.Serialization;
using VRC.SDK3.Data;
using VRC.SDK3.Image;
using VRC.SDK3.StringLoading;
using VRC.SDKBase;
using VRC.Udon.Common.Interfaces;
using VRCBoard;
using VRCBoard.Components;
using Object = UnityEngine.Object;


using UnityEditor;


namespace VRCBoard
{
    
    public enum IDType
    {
        Tier,
        Tag,
        Image
    }
    public class VRCBoardManager : UdonSharpBehaviour
    {
        public bool debugMode = true;
        
        public string vrcBoardDomain = "mydomain.vrcboard.app";
        public float periodicUpdateInterval = 60f;
        public string VrcBoardBaseUrl => "https://" + vrcBoardDomain + "/";
        public int atlasUrlCount = 100;
        
        public VRCBoardBaseComponent[] vrcBoardComponents;

        public VRCUrl[] atlasUrls;
        private VRCImageDownloader[] _imageDownloaders;
        private Texture2D[] _downloadedAtlasTextures;
        private float[] _atlasDownloadTimes;

        public VRCUrl[] customModuleUrls;

        public VRCUrl atlasInfoUrl;
        private DataDictionary _atlasInfo;

        public VRCUrl supporterInfoUrl;
        private DataDictionary _supporterInfo;
        private DataDictionary _supporterInfoVrcLookup;
        private DataList _supporterList;
        private DataList _perkNodes;


        [UdonSynced, FieldChangeCallback(nameof(instanceOwnerOverride))]
        private string _instanceOwnerOverride = "";
        
        public string instanceOwnerOverride
        {
            get => _instanceOwnerOverride;
            set
            {
                _instanceOwnerOverride = value;
                Networking.SetOwner(Networking.LocalPlayer, gameObject);
                RequestSerialization();
                Debug.Log("Instance owner override set to " + value);
            }
        }
        
        [UdonSynced, FieldChangeCallback(nameof(instanceOwner))] private string _instanceOwner;
        public string[] imageIdDownloadQueue = new string[0];
        
        public string instanceOwner
        {
            get {
                if (!string.IsNullOrWhiteSpace(instanceOwnerOverride)) return instanceOwnerOverride;
                return _instanceOwner;
            }
            set
            {
                _instanceOwner = value;
                Networking.SetOwner(Networking.LocalPlayer, gameObject);
                RequestSerialization();
                Debug.Log("Instance owner set to " + value);
            }
        }

        private void RemoveNullComponents()
        {
            int nullCount = 0;
            for (int i = 0; i < vrcBoardComponents.Length; i++)
            {
                if (vrcBoardComponents[i] == null)
                {
                    nullCount++;
                }
            }

            if (nullCount == 0) return;
            VRCBoardBaseComponent[] newComponents = new VRCBoardBaseComponent[vrcBoardComponents.Length - nullCount];
            int newIndex = 0;
            for (int i = 0; i < vrcBoardComponents.Length; i++)
            {
                if (vrcBoardComponents[i] == null) continue;
                newComponents[newIndex] = vrcBoardComponents[i];
                newIndex++;
            }

            vrcBoardComponents = newComponents;
        }
        private void Start()
        {
            int urlCount = atlasUrls.Length;
            _imageDownloaders = new VRCImageDownloader[urlCount];
            _downloadedAtlasTextures = new Texture2D[urlCount];
            _atlasDownloadTimes = new float[urlCount];
            for (int i = 0; i < atlasUrls.Length; i++)
            {   
                _imageDownloaders[i] = new VRCImageDownloader();
            }
            
            RemoveNullComponents();
            
            foreach (var component in vrcBoardComponents)
                component._Register(this);
            _PeriodicUpdate();
            _TaskLoop();
            Debug.Log("VRCBoardManager started");
        }

        public void _PeriodicUpdate()
        {
            //Debug.Log("Periodic update");
            if (Networking.LocalPlayer.isInstanceOwner) { instanceOwner = Networking.LocalPlayer.displayName; }
            _RequestAtlasInfoUpdate();
            _RequestSupporterInfoUpdate();
            SendCustomEventDelayedSeconds(nameof(_PeriodicUpdate), periodicUpdateInterval);
        }
        public void _TaskLoop()
        {
            //Debug.Log("Task loop");
            _TryUpdateAtlasInfo();
            _TryUpdateSupporterInfo();
            SendCustomEventDelayedSeconds(nameof(_TaskLoop), 1f);
        }
        
        
        private bool _shouldUpdateAtlasInfo = true;
        private bool _shouldUpdateSupporterInfo = true;
        private void _TryUpdateAtlasInfo()
        {
            if (!_shouldUpdateAtlasInfo) return;
            Debug.Log("Trying to update atlas info !");
            RequestUrlLoad(atlasInfoUrl);
            _shouldUpdateAtlasInfo = false;
        }
        private void _TryUpdateSupporterInfo()
        {
            if (!_shouldUpdateSupporterInfo) return;
            Debug.Log("Trying to update supporter info !");
            RequestUrlLoad(supporterInfoUrl);
            _shouldUpdateSupporterInfo = false;
        }
        
        [PublicAPI] public void _RequestAtlasInfoUpdate()
        {
            _shouldUpdateAtlasInfo = true;
        }
        [PublicAPI] public void _RequestSupporterInfoUpdate()
        {
            _shouldUpdateSupporterInfo = true;
        }
        
        
        private VRCUrl[] _currentlyDownloadingUrls = new VRCUrl[0];
        private void RequestUrlLoad(VRCUrl url)
        {
            string urlStr = url.Get();
            for (int i = 0; i < _currentlyDownloadingUrls.Length; i++)
            {
                if (_currentlyDownloadingUrls[i].Get() == urlStr)
                {
                    return;
                }
            }
            
            VRCStringDownloader.LoadUrl(url, (IUdonEventReceiver)this);
            VRCUrl[] newUrls = new VRCUrl[_currentlyDownloadingUrls.Length + 1];
            for (int i = 0; i < _currentlyDownloadingUrls.Length; i++)
            {
                newUrls[i] = _currentlyDownloadingUrls[i];
            }
            newUrls[_currentlyDownloadingUrls.Length] = url;
            _currentlyDownloadingUrls = newUrls;
        }
        
        
        public override void OnStringLoadSuccess(IVRCStringDownload download)
        {
            string url = download.Url.Get();
            
            VRCUrl[] newUrls = new VRCUrl[_currentlyDownloadingUrls.Length - 1];
            int newIndex = 0;
            for (int i = 0; i < _currentlyDownloadingUrls.Length; i++)
            {
                if (_currentlyDownloadingUrls[i].Get() == url)
                {
                    continue;
                }

                newUrls[newIndex] = _currentlyDownloadingUrls[i];
                newIndex++;
            }
            _currentlyDownloadingUrls = newUrls;
            
            //Debug.Log("String load success " + url);
            if (url == atlasInfoUrl.Get())
            {
                OnAtlasInfoDownload(download.Result);
            } else if (url == supporterInfoUrl.Get())
            {
                OnSupporterInfoDownload(download.Result);
            }
        }
        public override void OnStringLoadError(IVRCStringDownload result)
        {
            base.OnStringLoadError(result);
            Debug.LogWarning(result.Url.Get() + " : " + result.Error.ToString());
        }
        public DataDictionary _GetImageIdInfo(string imageId)
        {
            if (_atlasInfo == null) return null;
            if (!_atlasInfo.ContainsKey(imageId)) return null;
            DataToken token = _atlasInfo[imageId];
            if (token.TokenType != TokenType.DataDictionary) return null;
            return token.DataDictionary;
        }
        public bool _GetImageAtlasTexture(string imageId, string uploader, out int atlasIndex, out Texture2D texture, out int position, out int size, out string type)
        {
            texture = null;
            position = -1;
            size = -1;
            atlasIndex = -1;
            type = null;
            DataDictionary imageInfo = _GetImageIdInfo(imageId);
            if (imageInfo == null)
            {
                return false;
            }
            
            bool imageTypeSuccess = imageInfo.TryGetValue("type", out DataToken typeToken);
            bool uploadsSuccess = imageInfo.TryGetValue("uploads", out DataToken uploadsToken);
            bool atlasSizeSuccess = imageInfo.TryGetValue("size", out DataToken sizeToken);
            //Debug.Log("Get image atlas texture " + imageId + " success: " + imageTypeSuccess + " " + uploadsSuccess + " " + atlasSizeSuccess);
            if ((!imageTypeSuccess || !uploadsSuccess || !atlasSizeSuccess) || 
                (typeToken.TokenType != TokenType.String || uploadsToken.TokenType != TokenType.DataList || sizeToken.TokenType != TokenType.Double))
            {
                return false;
            }
            
            type = typeToken.String;
            size = (int)sizeToken.Double;
            
            bool isGlobal = type == "global";
            
            DataList uploads = uploadsToken.DataList;
            int uploadCount = uploads.Count;
            if (uploadCount == 0)
            {
                return false;
            }
            // find index of the uploader
            int uploaderIndex = 0;
            if (!isGlobal)
            {
                uploaderIndex = -1;
                if (uploader == null) return false;
                for (int i = 0; i < uploadCount; i++)
                {
                    DataDictionary upload = uploads[i].DataDictionary;
                    if (upload == null) continue;
                    bool uploaderSuccess = upload.TryGetValue("a", out DataToken uploaderToken);
                    //Debug.Log("Uploader success: " + uploaderSuccess);
                    if (!uploaderSuccess) continue;
                    if (uploaderToken.TokenType != TokenType.String) continue;
                    string uploadUploader = uploaderToken.String;
                    //Debug.Log("Comparing uploader " + uploadUploader + " to " + uploader);
                    if (uploadUploader == uploader)
                    {
                        //Debug.Log("Match");
                        uploaderIndex = i;
                        break;
                    }
                }
            }
            //Debug.Log("Uploader index: " + uploaderIndex);
            if (uploaderIndex == -1)
            {
                return false;
            }
            DataDictionary uploadInfo = uploads[uploaderIndex].DataDictionary;
            if (uploadInfo == null)
            {
                return false;
            }
            bool atlasIndexSuccess = uploadInfo.TryGetValue("i", out DataToken atlasIndexToken);
            if (!atlasIndexSuccess || atlasIndexToken.TokenType != TokenType.Double)
            {
                return false;
            }
            
            atlasIndex = (int)atlasIndexToken.Double;
            
            bool positionSuccess = uploadInfo.TryGetValue("p", out DataToken positionToken);
            if (!positionSuccess || positionToken.TokenType != TokenType.Double)
            {
                return false;
            }
            texture = _downloadedAtlasTextures[atlasIndex];
            position = (int)positionToken.Double;
            return true;
        }
        public void _RequestImageLoad(string imageId, string uploader, VRCBoardBaseComponent component)
        {
            //Debug.Log("Requesting image load " + imageId);
            if (string.IsNullOrEmpty(imageId)) return;
            string combinedId = $"{imageId}:{uploader}";
            if (HasImageInQueue(combinedId)) return;
            AddImageToQueue(combinedId);
        }
        private void TryDownloadImageId(string combinedImageId)
        {
            string[] split = combinedImageId.Split(':');
            if (split.Length != 2) return;
            string imageId = split[0];
            string uploader = split[1];
            bool success = _GetImageAtlasTexture(imageId, uploader, out int atlasIndex, out Texture2D texture,
                out int position, out int size, out string type);
            //Debug.Log("Try download image " + combinedImageId + " success: " + success);
            if (!success) return;
            DownloadAtlas(atlasIndex);

        }
        
        private void OnSupporterInfoDownload(string data)
        {
            Debug.Log("Supporter info download success");
            if (VRCJson.TryDeserializeFromJson(data, out DataToken result))
            {
                if (result.TokenType != TokenType.DataDictionary) return;
                SetSupporterInfo(result.DataDictionary);
                OnSupporterInfoUpdate();
                
            }
            else
            {
                Debug.LogError("Failed to deserialize supporter info");
            }
        }
        private void SetSupporterInfo(DataDictionary value)
        {
            _supporterInfo = value;
            if (_supporterInfo == null) return;
            bool vrcsuccess = _supporterInfo.TryGetValue("vrclookup", out DataToken vrcToken);
            bool supporterSuccess = _supporterInfo.TryGetValue("supporters", out DataToken supporterToken);
            bool perkSuccess = _supporterInfo.TryGetValue("perkNodes", out DataToken perkToken);
            if (vrcsuccess && vrcToken.TokenType == TokenType.DataDictionary)
            {
                _supporterInfoVrcLookup = vrcToken.DataDictionary;
            }
            if (supporterSuccess && supporterToken.TokenType == TokenType.DataList)
            {
                _supporterList = supporterToken.DataList;
            }
            if (perkSuccess && perkToken.TokenType == TokenType.DataList)
            {
                _perkNodes = perkToken.DataList;
            }
            Debug.Log("Set supporter info "+vrcsuccess+" "+supporterSuccess+" "+perkSuccess);
        }
        
        [PublicAPI]
        public bool PlayerHasTag(VRCPlayerApi player, string tag)
        {
            return PlayerHasTag(player.displayName, tag);
        }

        [PublicAPI]
        public bool PlayerHasTag(string displayName, string tag)
        {
            DataDictionary supporterData = GetSupporterDataFromPlayer(displayName);
            if (supporterData == null) return false;
            bool perkNodesSuccess = supporterData.TryGetValue("pn", out DataToken perkNodesToken);
            if (!perkNodesSuccess || perkNodesToken.TokenType != TokenType.DataList) return false;
            DataList perkNodes = perkNodesToken.DataList;
            for (int i = 0; i < perkNodes.Count; i++)
            {
                DataToken perkNode = perkNodes[i];
                if (perkNode.TokenType != TokenType.String) continue;
                if (perkNode.String == tag) return true;
            }
            return false;
        }
        
        [PublicAPI]
        public int SupporterCount => _supporterList.Count;
        [PublicAPI]
        public DataDictionary GetSupporterData(int index)
        {
            DataToken token = _supporterList[index];
            if (token.TokenType != TokenType.DataDictionary) return null;
            DataDictionary supporterData = token.DataDictionary;
            string perkNodesKey = "pn";
            bool perkNodesSuccess = supporterData.TryGetValue(perkNodesKey, out DataToken pnToken);
            if (!perkNodesSuccess || pnToken.TokenType != TokenType.DataList) return supporterData;
            DataList perkNodes = pnToken.DataList;
            for (int i = 0; i < perkNodes.Count; i++)
            {
                DataToken perkNodeToken = perkNodes[i];
                if (perkNodeToken.TokenType != TokenType.Double) continue;
                int perkIndex = (int)perkNodeToken.Double;
                if (perkIndex < 0 || perkIndex >= _perkNodes.Count) continue;
                DataToken perkNode = _perkNodes[perkIndex];
                if (perkNode.TokenType != TokenType.DataDictionary) continue;
                bool perkNameSuccess = perkNode.DataDictionary.TryGetValue("id", out DataToken perkNameToken);
                if (!perkNameSuccess || perkNameToken.TokenType != TokenType.String) continue;
                perkNodes[i] = perkNameToken;
            }
            supporterData[perkNodesKey] = perkNodes;
            return supporterData;
        }
        
        [PublicAPI]
        public DataDictionary GetSupporterDataFromPlayer(string vrcName)
        {
            if (_supporterInfoVrcLookup == null) return null;
            if (!_supporterInfoVrcLookup.ContainsKey(vrcName)) return null;
            DataToken token = _supporterInfoVrcLookup[vrcName];
            if (token.TokenType != TokenType.Double) return null;
            int index = (int)token.Double;
            return GetSupporterData(index);
        }
        
        [PublicAPI]
        public DataDictionary GetSupporterDataFromPlayer(VRCPlayerApi player)
        {
            return GetSupporterDataFromPlayer(player.displayName);
        }
        
        private void OnSupporterInfoUpdate()
        {
            Debug.Log("Supporter info updated");
            foreach (var component in vrcBoardComponents)
                component._OnSupporterDataUpdate();
        }

        private void OnAtlasInfoDownload(string data)
        {
            //Debug.Log("Atlas info download success");
            if (VRCJson.TryDeserializeFromJson(data, out DataToken result))
            {
                if (result.TokenType != TokenType.DataDictionary) return;
                _atlasInfo = result.DataDictionary;
                OnAtlasInfoUpdate();
            }
            else
            {
                Debug.LogError("Failed to deserialize atlas info");
            }
        }
        
        

        private void OnAtlasInfoUpdate()
        {
            //Debug.Log("Atlas info updated");
            if (_atlasInfo == null) return;
            while (true)
            {
                string combinedImageId = GetNextImageInQueue();
                if (combinedImageId == null) break;
                TryDownloadImageId(combinedImageId);
            }

            foreach (var component in vrcBoardComponents)
                component._OnImageInfoUpdate();
        }

        

        private void DownloadAtlas(int index)
        {
            //Debug.Log("Downloading atlas " + index);
            if (index < 0 || index >= atlasUrls.Length) return;
            VRCUrl url = GetAtlasUrlFromIndex(index);
            VRCImageDownloader imageDownloader = _imageDownloaders[index];
            imageDownloader.Dispose();

            if (url == null) return;
            TextureInfo textureInfo = new TextureInfo();
            textureInfo.FilterMode = FilterMode.Bilinear;
            textureInfo.WrapModeU = TextureWrapMode.Clamp;
            textureInfo.WrapModeV = TextureWrapMode.Clamp;
            textureInfo.WrapModeW = TextureWrapMode.Clamp;
            IVRCImageDownload download =
                imageDownloader.DownloadImage(url, null, (IUdonEventReceiver)this, textureInfo);
        }

        public override void OnImageLoadSuccess(IVRCImageDownload result)
        {
            string url = result.Url.Get();
            Debug.Log("Image load success " + url);
            Texture2D texture = result.Result;
            int index = GetAtlasIndexFromUrl(url);
            if (index == -1) return;
            _downloadedAtlasTextures[index] = texture;
            _atlasDownloadTimes[index] = Time.time;
            Debug.Log("Downloaded atlas texture " + index);
            foreach (var component in vrcBoardComponents)
                component._OnAtlasImageLoaded(index);
        }

        [PublicAPI]
        public Texture2D GetTexture2D(string uploader, string imageId)
        {
            bool success = _GetImageAtlasTexture(imageId, uploader, out int atlasIndex, out Texture2D texture,
                out int position, out int size, out string type);

            if (!success || atlasIndex == -1)
            {
                Debug.LogWarning("[VRCBoard] [GetTexture2D] Failed to get texture for " + uploader);
                return null;
            }

            if (texture == null)
            {
                Debug.LogWarning("[VRCBoard] [GetTexture2D] Failed to get texture for " + uploader);
                return null;
            }

            int blockSize = (int)Mathf.Floor((float)(texture.width) / (float)(size));


            int startX = position % size;
            int startY = size - (int)Mathf.Floor((float)position / (float)size) - 1;
            
            // Debug.Log("texture startX:" + startX + ", startY:" + startY);
            
            int blockWidth = blockSize;
            int blockHeight = blockSize;
            
            Texture2D newTexture = new Texture2D (blockWidth, blockHeight);
            Color[] pixels = texture.GetPixels(startX * blockWidth, startY * blockHeight, blockWidth, blockHeight);
            newTexture.SetPixels(pixels);
            newTexture.wrapMode = TextureWrapMode.Clamp;
            newTexture.filterMode = FilterMode.Trilinear;
            newTexture.anisoLevel = 1;
            //newTexture.alphaIsTransparency = true;
            newTexture.Apply();
            return newTexture;
        }

        public override void OnImageLoadError(IVRCImageDownload result)
        {
            base.OnImageLoadError(result);
            Debug.LogWarning(result.Url.Get() + " : " + result.Error.ToString());
        }
        private int GetAtlasIndexFromUrl(string url)
        {
            for (int i = 0; i < atlasUrls.Length; i++)
            {
                if (atlasUrls[i].Get() == url) return i;
            }

            return -1;
        }
        private VRCUrl GetAtlasUrlFromIndex(int index)
        {
            if (index < 0 || index >= atlasUrls.Length || atlasUrls[index] == null)
            {
                return null;
            }

            return atlasUrls[index];
        }

        #region Queue Functions

        private void AddImageToQueue(string imageId)
        {
            string[] newQueue = new string[imageIdDownloadQueue.Length + 1];
            for (int i = 0; i < imageIdDownloadQueue.Length; i++)
            {
                newQueue[i] = imageIdDownloadQueue[i];
            }

            newQueue[imageIdDownloadQueue.Length] = imageId;
            imageIdDownloadQueue = newQueue;
            _RequestAtlasInfoUpdate();
        }

        private bool HasImageInQueue(string imageId)
        {
            for (int i = 0; i < imageIdDownloadQueue.Length; i++)
            {
                if (imageIdDownloadQueue[i] == imageId)
                {
                    return true;
                }
            }

            return false;
        }

        private string GetNextImageInQueue()
        {
            if (imageIdDownloadQueue.Length == 0) return null;
            string imageId = imageIdDownloadQueue[0];
            string[] newQueue = new string[imageIdDownloadQueue.Length - 1];
            for (int i = 1; i < imageIdDownloadQueue.Length; i++)
            {
                newQueue[i - 1] = imageIdDownloadQueue[i];
            }

            imageIdDownloadQueue = newQueue;
            return imageId;
        }

        #endregion
    }
}
#if UNITY_EDITOR && !UDONSHARP_COMPILER
namespace VRCBoard
{
    [CustomEditor(typeof(VRCBoardManager))]
    public class VrcBoardManagerEditor : Editor
    {
        public override void OnInspectorGUI()
        {
            //base.OnInspectorGUI();
            VRCBoardManager manager = target as VRCBoardManager;
            if (manager == null)
            {
                EditorGUILayout.HelpBox("This script is not attached to a VRCBoardManager object", MessageType.Error);
                return;
            }

            
        
            // draw a header
            EditorGUILayout.HelpBox("VRCBoard Manager", MessageType.Info);
            string domainInput = EditorGUILayout.TextField("Your VRCBoard Domain", manager.vrcBoardDomain);
            bool changed = domainInput != manager.vrcBoardDomain;
            
            int urlCount = EditorGUILayout.IntField("Atlas Url Count [10-1000]", manager.atlasUrlCount);
            bool urlCountChanged = urlCount != manager.atlasUrlCount;
            manager.atlasUrlCount = Math.Clamp(urlCount, 10, 1000);
            
            
            if (changed || urlCountChanged)
            {
                domainInput = domainInput.Trim();
                domainInput = domainInput.Replace("http://", "");
                domainInput = domainInput.Replace("https://", "");
                domainInput = domainInput.Replace("/", "");
                manager.vrcBoardDomain = domainInput;
                
                string baseUrl = manager.VrcBoardBaseUrl;
                // update the urls
                manager.atlasUrls = new VRCUrl[manager.atlasUrlCount];
                for (int i = 0; i < manager.atlasUrlCount; i++)
                {
                    manager.atlasUrls[i] = new VRCUrl(baseUrl + "atlas/" + i);
                }
            
                const string apiPath = "api/data/v1/";
            
                manager.atlasInfoUrl = new VRCUrl(baseUrl + apiPath + "atlas");
                manager.supporterInfoUrl = new VRCUrl(baseUrl + apiPath + "supporters");
                EditorUtility.SetDirty(manager);
            }
            
            
            float selectedInterval = EditorGUILayout.FloatField("Periodic Update Interval", manager.periodicUpdateInterval);
            manager.periodicUpdateInterval = Mathf.Clamp(selectedInterval, 5f, 600f);
            EditorGUILayout.Space();
            
            SerializedProperty vrcBoardComponents = serializedObject.FindProperty("vrcBoardComponents");
            EditorGUILayout.PropertyField(vrcBoardComponents);
            
            if (GUILayout.Button("Link all VRCBoard components"))
            {
                VRCBoardBaseComponent[] components = FindObjectsOfType<VRCBoardBaseComponent>();
                manager.vrcBoardComponents = components;
                // mark the object as dirty
                EditorUtility.SetDirty(manager);
            }
            
            
            serializedObject.ApplyModifiedProperties();

            //DrawDefaultInspector();



        }
    }
}
    
#endif