/*
 * Unity VSCode Support
 *
 * Seamless support for Microsoft Visual Studio Code in Unity
 *
 * Version:
 *   2.7
 *
 * Authors:
 *   Matthew Davey <matthew.davey@dotbunny.com>
 */
namespace dotBunny.Unity
{
    using System;
    using System.IO;
    using System.Text.RegularExpressions;
    using UnityEditor;
    using UnityEngine;

    [InitializeOnLoad]
    public static class VSCode
    {
        /// <summary>
        /// Current Version Number
        /// </summary>
        public const float Version = 2.7f;

        /// <summary>
        /// Current Version Code
        /// </summary>
        public const string VersionCode = "-RELEASE";
        
        /// <summary>
        /// Download URL for Unity Debbuger
        /// </summary>
        public const string UnityDebuggerURL = "https://raw.githubusercontent.com/dotBunny/VSCode-Test/master/Downloads/unity-debug-101.vsix";

        #region Properties

        /// <summary>
        /// Path to VSCode executable
        public static string CodePath
        {
            get
            {
		        string current = EditorPrefs.GetString("VSCode_CodePath", "");
                if(current == "" || !VSCodeExists(current))
                {
                    //Value not set, set to "" or current path is invalid, try to autodetect it
                    //If autodetect fails, a error will be printed and the default value set
                    EditorPrefs.SetString("VSCode_CodePath", AutodetectCodePath());
                    //If its not installed or the install folder isn't a "normal" one,
                    //AutodetectCodePath will print a error message to the Unity Console
                }
                return EditorPrefs.GetString("VSCode_CodePath", current);
            }
            set 
            {
                EditorPrefs.SetString("VSCode_CodePath", value);
            }
        }
        
        /// <summary>
        /// Get Program Files Path
        /// </summary>
        /// <returns>The platforms "Program Files" path.</returns>
        static string ProgramFilesx86()
		{
			if( 8 == IntPtr.Size 
				|| (!String.IsNullOrEmpty(Environment.GetEnvironmentVariable("PROCESSOR_ARCHITEW6432"))))
			{
				return Environment.GetEnvironmentVariable("ProgramFiles(x86)");
			}

			return Environment.GetEnvironmentVariable("ProgramFiles");
		}
		
        
        /// <summary>
        /// Should debug information be displayed in the Unity terminal?
        /// </summary>
        public static bool Debug
        {
            get
            {
                return EditorPrefs.GetBool("VSCode_Debug", false);
            }
            set
            {
                EditorPrefs.SetBool("VSCode_Debug", value);
            }
        }

        /// <summary>
        /// Is the Visual Studio Code Integration Enabled?
        /// </summary>
        /// <remarks>
        /// We do not want to automatically turn it on, for in larger projects not everyone is using VSCode
        /// </remarks>
        public static bool Enabled
        {
            get
            {
                return EditorPrefs.GetBool("VSCode_Enabled", false);
            }
            set
            {
                // When turning the plugin on, we should remove all the previous project files
                if (!Enabled && value)
                {
                    ClearProjectFiles();
                }
                EditorPrefs.SetBool("VSCode_Enabled", value);
            }
        }
        public static bool UseUnityDebugger
        {
            get
            {
                return EditorPrefs.GetBool("VSCode_UseUnityDebugger", false);
            }
            set
            {
                if ( value != UseUnityDebugger ) {
                    
                    // Set value
                    EditorPrefs.SetBool("VSCode_UseUnityDebugger", value);
                    
                    // Do not write the launch JSON file because the debugger uses its own
                    if ( value ) {
                        WriteLaunchFile = false;
                    }
                    
                    // Update launch file
                    UpdateLaunchFile();
                }
            }
        }

        /// <summary>
        /// Should the launch.json file be written?
        /// </summary>
        /// <remarks>
        /// Useful to disable if someone has their own custom one rigged up
        /// </remarks>
        public static bool WriteLaunchFile
        {
            get
            {
                return EditorPrefs.GetBool("VSCode_WriteLaunchFile", true);
            }
            set
            {
                EditorPrefs.SetBool("VSCode_WriteLaunchFile", value);
            }
        }

        /// <summary>
        /// Should the plugin automatically update itself.
        /// </summary>
        static bool AutomaticUpdates
        {
            get
            {
                return EditorPrefs.GetBool("VSCode_AutomaticUpdates", false);
            }
            set
            {
                EditorPrefs.SetBool("VSCode_AutomaticUpdates", value);
            }
        }

        static float GitHubVersion
        {
            get
            {
                return EditorPrefs.GetFloat("VSCode_GitHubVersion", Version);
            }
            set
            {
                EditorPrefs.SetFloat("VSCode_GitHubVersion", value);
            }
        }

        /// <summary>
        /// When was the last time that the plugin was updated?
        /// </summary>
        static DateTime LastUpdate
        {
            get
            {
                // Feature creation date.
                DateTime lastTime = new DateTime(2015, 10, 8);

                if (EditorPrefs.HasKey("VSCode_LastUpdate"))
                {
                    DateTime.TryParse(EditorPrefs.GetString("VSCode_LastUpdate"), out lastTime);
                }
                return lastTime;
            }
            set
            {
                EditorPrefs.SetString("VSCode_LastUpdate", value.ToString());
            }
        }

        /// <summary>
        /// Quick reference to the VSCode launch settings file
        /// </summary>
        static string LaunchPath
        {
            get
            {
                return SettingsFolder + System.IO.Path.DirectorySeparatorChar + "launch.json";
            }
        }

        /// <summary>
        /// The full path to the project
        /// </summary>
        static string ProjectPath
        {
            get
            {
                return System.IO.Path.GetDirectoryName(UnityEngine.Application.dataPath);
            }
        }

        /// <summary>
        /// Should the script editor be reverted when quiting Unity.
        /// </summary>
        /// <remarks>
        /// Useful for environments where you do not use VSCode for everything.
        /// </remarks>
        static bool RevertExternalScriptEditorOnExit
        {
            get
            {
                return EditorPrefs.GetBool("VSCode_RevertScriptEditorOnExit", true);
            }
            set
            {
                EditorPrefs.SetBool("VSCode_RevertScriptEditorOnExit", value);
            }
        }

        /// <summary>
        /// Quick reference to the VSCode settings folder
        /// </summary>
        static string SettingsFolder
        {
            get
            {
                return ProjectPath + System.IO.Path.DirectorySeparatorChar + ".vscode";
            }
        }

        static string SettingsPath
        {

            get
            {
                return SettingsFolder + System.IO.Path.DirectorySeparatorChar + "settings.json";
            }
        }

        static int UpdateTime
        {
            get
            {
                return EditorPrefs.GetInt("VSCode_UpdateTime", 7);
            }
            set
            {
                EditorPrefs.SetInt("VSCode_UpdateTime", value);
            }
        }

        #endregion

        /// <summary>
        /// Integration Constructor
        /// </summary>
        static VSCode()
        {
            if (Enabled)
            {
                UpdateUnityPreferences(true);
                UpdateLaunchFile();
                
                // Add Update Check
                DateTime targetDate = LastUpdate.AddDays(UpdateTime);
                if (DateTime.Now >= targetDate && AutomaticUpdates)
                {
                    CheckForUpdate();
                }
            }
            
            // Event for when script is reloaded 
            System.AppDomain.CurrentDomain.DomainUnload += System_AppDomain_CurrentDomain_DomainUnload;
        }
        static void System_AppDomain_CurrentDomain_DomainUnload(object sender, System.EventArgs e)
        {
            if (Enabled && RevertExternalScriptEditorOnExit)
            {
                UpdateUnityPreferences(false);
            }
        }


        #region Public Members

        /// <summary>
        /// Force Unity To Write Project File
        /// </summary>
        /// <remarks>
        /// Reflection!
        /// </remarks>
        public static void SyncSolution()
        {
            System.Type T = System.Type.GetType("UnityEditor.SyncVS,UnityEditor");
            System.Reflection.MethodInfo SyncSolution = T.GetMethod("SyncSolution", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static);
            SyncSolution.Invoke(null, null);

        }

        /// <summary>
        /// Update the solution files so that they work with VS Code
        /// </summary>
        public static void UpdateSolution()
        {
            // No need to process if we are not enabled
            if (!VSCode.Enabled)
            {
                return;
            }

            if (VSCode.Debug)
            {
                UnityEngine.Debug.Log("[VSCode] Updating Solution & Project Files");
            }

            var currentDirectory = Directory.GetCurrentDirectory();
            var solutionFiles = Directory.GetFiles(currentDirectory, "*.sln");
            var projectFiles = Directory.GetFiles(currentDirectory, "*.csproj");

            foreach (var filePath in solutionFiles)
            {
                string content = File.ReadAllText(filePath);
                content = ScrubSolutionContent(content);

                File.WriteAllText(filePath, content);

                ScrubFile(filePath);
            }

            foreach (var filePath in projectFiles)
            {
                string content = File.ReadAllText(filePath);
                content = ScrubProjectContent(content);

                File.WriteAllText(filePath, content);

                ScrubFile(filePath);
            }

        }

        #endregion

        #region Private Members
    
        /// <summary>
        /// Try to find automatically the installation of VSCode
        /// </summary>
        static string AutodetectCodePath() 
        {
            string[] possiblePaths =
#if UNITY_EDITOR_OSX
            {
                "/Applications/Visual Studio Code.app",
                "/Applications/Visual Studio Code - Insiders.app"
            };
#elif UNITY_EDITOR_WIN
            {
                ProgramFilesx86() + Path.DirectorySeparatorChar + "Microsoft VS Code"
                + Path.DirectorySeparatorChar + "bin" + Path.DirectorySeparatorChar + "code.cmd",
                ProgramFilesx86() + Path.DirectorySeparatorChar + "Microsoft VS Code Insiders"
                + Path.DirectorySeparatorChar + "bin" + Path.DirectorySeparatorChar + "code-insiders.cmd"
            };
#else
            {
                "/usr/bin/code",
                "/bin/code",
                "/usr/local/bin/code"
            };
#endif
            for(int i = 0; i < possiblePaths.Length; i++)
            {
                if(VSCodeExists(possiblePaths[i])) 
                {
                    return possiblePaths[i];
                }
            }
            PrintNotFound(possiblePaths[0]);
            return possiblePaths[0]; //returns the default one, printing a warning message 'executable not found'
        }

        /// <summary>
        /// Call VSCode with arguments
        /// </summary>
        static void CallVSCode(string args)
        {
            System.Diagnostics.Process proc = new System.Diagnostics.Process();
            if(!VSCodeExists(CodePath))
            {
            	PrintNotFound(CodePath);
            	return;
            }

#if UNITY_EDITOR_OSX
            proc.StartInfo.FileName = "open";

            // Check the path to see if there is "Insiders"
            if (CodePath.Contains("Insiders"))
            {  
                proc.StartInfo.Arguments = " -n -b \"com.microsoft.VSCodeInsiders\" --args " + args.Replace(@"\", @"\\");
            } 
            else 
            {
                proc.StartInfo.Arguments = " -n -b \"com.microsoft.VSCode\" --args " + args.Replace(@"\", @"\\");
            }

            proc.StartInfo.UseShellExecute = false;
#elif UNITY_EDITOR_WIN
            proc.StartInfo.FileName = CodePath;
	        proc.StartInfo.Arguments = args;
            proc.StartInfo.UseShellExecute = false;
#else
            proc.StartInfo.FileName = CodePath;
	        proc.StartInfo.Arguments = args.Replace(@"\", @"\\");
            proc.StartInfo.UseShellExecute = false;
#endif
            proc.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
            proc.StartInfo.CreateNoWindow = true;
            proc.StartInfo.RedirectStandardOutput = true;
            proc.Start();
        }

        /// <summary>
        /// Check for Updates with GitHub
        /// </summary>
        static void CheckForUpdate()
        {
            var fileContent = string.Empty;

            EditorUtility.DisplayProgressBar("VSCode", "Checking for updates ...", 0.5f);

            // Because were not a runtime framework, lets just use the simplest way of doing this
            try
            {
                using (var webClient = new System.Net.WebClient())
                {
                    fileContent = webClient.DownloadString("https://raw.githubusercontent.com/dotBunny/VSCode/master/Plugins/Editor/VSCode.cs");
                }
            }
            catch (Exception e)
            {
                if (Debug)
                {
                    UnityEngine.Debug.Log("[VSCode] " + e.Message);

                }

                // Don't go any further if there is an error
                return;
            }
            finally
            {
                EditorUtility.ClearProgressBar();
            }

            // Set the last update time
            LastUpdate = DateTime.Now;

            // Fix for oddity in downlo
            if (fileContent.Substring(0, 2) != "/*")
            {
                int startPosition = fileContent.IndexOf("/*", StringComparison.CurrentCultureIgnoreCase);

                // Jump over junk characters
                fileContent = fileContent.Substring(startPosition);
            }

            string[] fileExploded = fileContent.Split('\n');
            if (fileExploded.Length > 7)
            {
                float github = Version;
                if (float.TryParse(fileExploded[6].Replace("*", "").Trim(), out github))
                {
                    GitHubVersion = github;
                }


                if (github > Version)
                {
                    var GUIDs = AssetDatabase.FindAssets("t:Script VSCode");
                    var path = Application.dataPath.Substring(0, Application.dataPath.Length - "/Assets".Length) + System.IO.Path.DirectorySeparatorChar +
                               AssetDatabase.GUIDToAssetPath(GUIDs[0]).Replace('/', System.IO.Path.DirectorySeparatorChar);

                    if (EditorUtility.DisplayDialog("VSCode Update", "A newer version of the VSCode plugin is available, would you like to update your version?", "Yes", "No"))
                    {
                        // Always make sure the file is writable
                        System.IO.FileInfo fileInfo = new System.IO.FileInfo(path);
                        fileInfo.IsReadOnly = false;

                        // Write update file
                        File.WriteAllText(path, fileContent);

                        // Force update on text file
                        AssetDatabase.ImportAsset(AssetDatabase.GUIDToAssetPath(GUIDs[0]), ImportAssetOptions.ForceUpdate);
                    }

                }
            }
        }

        /// <summary>
        /// Clear out any existing project files and lingering stuff that might cause problems
        /// </summary>
        static void ClearProjectFiles()
        {
            var currentDirectory = Directory.GetCurrentDirectory();
            var solutionFiles = Directory.GetFiles(currentDirectory, "*.sln");
            var projectFiles = Directory.GetFiles(currentDirectory, "*.csproj");
            var unityProjectFiles = Directory.GetFiles(currentDirectory, "*.unityproj");

            foreach (string solutionFile in solutionFiles)
            {
                File.Delete(solutionFile);
            }
            foreach (string projectFile in projectFiles)
            {
                File.Delete(projectFile);
            }
            foreach (string unityProjectFile in unityProjectFiles)
            {
                File.Delete(unityProjectFile);
            }

            // Replace with our clean files (only in Unity 5)
#if !UNITY_4_0 && !UNITY_4_1 && !UNITY_4_2 && !UNITY_4_3 && !UNITY_4_5 && !UNITY_4_6 && !UNITY_4_7
            SyncSolution();
#endif
        }

        /// <summary>
        /// Force Unity Preferences Window To Read From Settings
        /// </summary>
        static void FixUnityPreferences()
        {
            // I want that window, please and thank you
            System.Type T = System.Type.GetType("UnityEditor.PreferencesWindow,UnityEditor");

            if (EditorWindow.focusedWindow == null)
                return;

            // Only run this when the editor window is visible (cause its what screwed us up)
            if (EditorWindow.focusedWindow.GetType() == T)
            {
                var window = EditorWindow.GetWindow(T, true, "Unity Preferences");


                if (window == null)
                {
                    if (Debug)
                    {
                        UnityEngine.Debug.Log("[VSCode] No Preferences Window Found (really?)");
                    }
                    return;
                }

                var invokerType = window.GetType();
                var invokerMethod = invokerType.GetMethod("ReadPreferences",
                    System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);

                if (invokerMethod != null)
                {
                    invokerMethod.Invoke(window, null);
                }
                else if (Debug)
                {
                    UnityEngine.Debug.Log("[VSCode] No Reflection Method Found For Preferences");
                }
            }
        }

        /// <summary>
        /// Determine what port Unity is listening for on Windows
        /// </summary>
        static int GetDebugPort()
        {
#if UNITY_EDITOR_WIN
            System.Diagnostics.Process process = new System.Diagnostics.Process();
            process.StartInfo.FileName = "netstat";
            process.StartInfo.Arguments = "-a -n -o -p TCP";
            process.StartInfo.UseShellExecute = false;
            process.StartInfo.RedirectStandardOutput = true;
            process.Start();

            string output = process.StandardOutput.ReadToEnd();
            string[] lines = output.Split('\n');

            process.WaitForExit();

            foreach (string line in lines)
            {
                string[] tokens = Regex.Split(line, "\\s+");
                if (tokens.Length > 4)
                {
                    int test = -1;
                    int.TryParse(tokens[5], out test);

                    if (test > 1023)
                    {
                        try
                        {
                            var p = System.Diagnostics.Process.GetProcessById(test);
                            if (p.ProcessName == "Unity")
                            {
                                return test;
                            }
                        }
                        catch
                        {

                        }
                    }
                }
            }
#else
            System.Diagnostics.Process process = new System.Diagnostics.Process();
            process.StartInfo.FileName = "lsof";
            process.StartInfo.Arguments = "-c /^Unity$/ -i 4tcp -a";
            process.StartInfo.UseShellExecute = false;
            process.StartInfo.RedirectStandardOutput = true;
            process.Start();

            // Not thread safe (yet!)
            string output = process.StandardOutput.ReadToEnd();
            string[] lines = output.Split('\n');

            process.WaitForExit();

            foreach (string line in lines)
            {
                int port = -1;
                if (line.StartsWith("Unity"))
                {
                    string[] portions = line.Split(new string[] { "TCP *:" }, System.StringSplitOptions.None);
                    if (portions.Length >= 2)
                    {
                        Regex digitsOnly = new Regex(@"[^\d]");
                        string cleanPort = digitsOnly.Replace(portions[1], "");
                        if (int.TryParse(cleanPort, out port))
                        {
                            if (port > -1)
                            {
                                return port;
                            }
                        }
                    }
                }
            }
#endif
            return -1;
        }

        /// <summary>
        /// Manually install the original Unity Debuger
        /// </summary> 
        /// <remarks>
        /// This should auto update to the latest.
        /// </remarks>
        static void InstallUnityDebugger()
        {
            EditorUtility.DisplayProgressBar("VSCode", "Downloading Unity Debugger ...", 0.1f);
            byte[] fileContent;
            
            try
            {
                using (var webClient = new System.Net.WebClient())
                {
                    fileContent = webClient.DownloadData(UnityDebuggerURL);
                }
            }
            catch (Exception e)
            {
                if (Debug)
                {
                    UnityEngine.Debug.Log("[VSCode] " + e.Message);
                }
                // Don't go any further if there is an error
                return;
            }
            finally
            {
                EditorUtility.ClearProgressBar();
            }
            
            // Do we have a file to install?
            if ( fileContent != null ) {
                string fileName = System.IO.Path.GetTempPath() + Guid.NewGuid().ToString() + ".vsix";
                File.WriteAllBytes(fileName, fileContent);
                
                CallVSCode(fileName);
            }

        }
   
        // HACK: This is in until Unity can figure out why MD keeps opening even though a different program is selected.
        [MenuItem("Assets/Open C# Project In Code", false, 1000)]
        static void MenuOpenProject()
        {
            // Force the project files to be sync
            SyncSolution();

            // Load Project
            CallVSCode("\"" + ProjectPath + "\" -r");
        }

        /// <summary>
        /// Print a error message to the Unity Console about not finding the code executable
        /// </summary>
        static void PrintNotFound(string path)
        {
            UnityEngine.Debug.LogError("[VSCode] Code executable in '" + path + "' not found. Check your" +
            "Visual Studio Code installation and insert the correct path in the Preferences menu.");
        }

        [MenuItem("Assets/Open C# Project In Code", true, 1000)]
        static bool ValidateMenuOpenProject()
        {
            return Enabled;
        }

        /// <summary>
        /// VS Code Integration Preferences Item
        /// </summary>
        /// <remarks>
        /// Contains all 3 toggles: Enable/Disable; Debug On/Off; Writing Launch File On/Off
        /// </remarks>
        [PreferenceItem("VSCode")]
        static void VSCodePreferencesItem()
        {
            if (EditorApplication.isCompiling)
            {
                EditorGUILayout.HelpBox("Please wait for Unity to finish compiling. \nIf the window doesn't refresh, simply click on the window or move it around to cause a repaint to happen.", MessageType.Warning);
                return;
            }
            EditorGUILayout.BeginVertical();

            EditorGUILayout.HelpBox("Support development of this plugin, follow @reapazor and @dotbunny on Twitter.", MessageType.Info);

            EditorGUI.BeginChangeCheck();
            
// Need the VS Code executable
            EditorGUILayout.BeginHorizontal();
            EditorGUILayout.LabelField("VS Code Path", GUILayout.Width(75));
#if UNITY_5_3_OR_NEWER            
            CodePath = EditorGUILayout.DelayedTextField(CodePath,  GUILayout.ExpandWidth(true));
#else
            CodePath = EditorGUILayout.TextField(CodePath,  GUILayout.ExpandWidth(true));
#endif        
            GUI.SetNextControlName("PathSetButton");    
            if(GUILayout.Button("...", GUILayout.Height(14), GUILayout.Width(20)))
            {
                GUI.FocusControl("PathSetButton");
                string path = EditorUtility.OpenFilePanel( "Visual Studio Code Executable", "", "" );
                if( path.Length != 0 && File.Exists(path) || Directory.Exists(path))
                {
                    CodePath = path;
                }
            }
            EditorGUILayout.EndHorizontal();
            EditorGUILayout.Space();

            Enabled = EditorGUILayout.Toggle(new GUIContent("Enable Integration", "Should the integration work its magic for you?"), Enabled);

            UseUnityDebugger = EditorGUILayout.Toggle(new GUIContent("Use Unity Debugger", "Should the integration integrate with Unity's VSCode Extension (must be installed)."), UseUnityDebugger);

            EditorGUILayout.Space();
            RevertExternalScriptEditorOnExit = EditorGUILayout.Toggle(new GUIContent("Revert Script Editor On Unload", "Should the external script editor setting be reverted to its previous setting on project unload? This is useful if you do not use Code with all your projects."),RevertExternalScriptEditorOnExit);
            
            Debug = EditorGUILayout.Toggle(new GUIContent("Output Messages To Console", "Should informational messages be sent to Unity's Console?"), Debug);

            WriteLaunchFile = EditorGUILayout.Toggle(new GUIContent("Always Write Launch File", "Always write the launch.json settings when entering play mode?"), WriteLaunchFile);

            EditorGUILayout.Space();

            AutomaticUpdates = EditorGUILayout.Toggle(new GUIContent("Automatic Updates", "Should the plugin automatically update itself?"), AutomaticUpdates);

            UpdateTime = EditorGUILayout.IntSlider(new GUIContent("Update Timer (Days)", "After how many days should updates be checked for?"), UpdateTime, 1, 31);

            EditorGUILayout.Space();
            EditorGUILayout.Space();

            if (EditorGUI.EndChangeCheck())
            {
                UpdateUnityPreferences(Enabled);

                // TODO: Force Unity To Reload Preferences
                // This seems to be a hick up / issue
                if (VSCode.Debug)
                {
                    if (Enabled)
                    {
                        UnityEngine.Debug.Log("[VSCode] Integration Enabled");
                    }
                    else
                    {
                        UnityEngine.Debug.Log("[VSCode] Integration Disabled");
                    }
                }
            }

            if (GUILayout.Button(new GUIContent("Force Update", "Check for updates to the plugin, right NOW!")))
            {
                CheckForUpdate();
                EditorGUILayout.EndVertical();
                return;
            }
            if (GUILayout.Button(new GUIContent("Write Workspace Settings", "Output a default set of workspace settings for VSCode to use, ignoring many different types of files.")))
            {
                WriteWorkspaceSettings();
                EditorGUILayout.EndVertical();
                return;
            }
            EditorGUILayout.Space();

            if (UseUnityDebugger)
            {
                EditorGUILayout.HelpBox("In order for the \"Use Unity Debuggger\" option to function above, you need to have installed the Unity Debugger Extension for Visual Studio Code.", MessageType.Warning);
                if (GUILayout.Button(new GUIContent("Install Unity Debugger", "Install the Unity Debugger Extension into Code")))
                {
                    InstallUnityDebugger();
                    EditorGUILayout.EndVertical();
                    return;
                }
            }

            GUILayout.FlexibleSpace();
            EditorGUILayout.BeginHorizontal();
            GUILayout.FlexibleSpace();

            GUILayout.Label(
                new GUIContent(
                    string.Format("{0:0.00}", Version) + VersionCode,
                    "GitHub's Version @ " + string.Format("{0:0.00}", GitHubVersion)));

            EditorGUILayout.EndHorizontal();
            EditorGUILayout.EndVertical();
        }

        /// <summary>
        /// Asset Open Callback (from Unity)
        /// </summary>
        /// <remarks>
        /// Called when Unity is about to open an asset.
        /// </remarks>
        [UnityEditor.Callbacks.OnOpenAssetAttribute()]
        static bool OnOpenedAsset(int instanceID, int line)
        {
            // bail out if we are not using VSCode
            if (!Enabled)
            {
                return false;
            }

            // current path without the asset folder
            string appPath = ProjectPath;

            // determine asset that has been double clicked in the project view
            UnityEngine.Object selected = EditorUtility.InstanceIDToObject(instanceID);

            if (selected.GetType().ToString() == "UnityEditor.MonoScript" ||
                selected.GetType().ToString() == "UnityEngine.Shader")
            {
                string completeFilepath = appPath + Path.DirectorySeparatorChar + AssetDatabase.GetAssetPath(selected);

                string args = null;
                if (line == -1)
                {
                    args = "\"" + ProjectPath + "\" \"" + completeFilepath + "\" -r";
                }
                else
                {
                    args = "\"" + ProjectPath + "\" -g \"" + completeFilepath + ":" + line.ToString() + "\" -r";
                }
                // call 'open'
                CallVSCode(args);

                return true;
            }

            // Didnt find a code file? let Unity figure it out
            return false;

        }

        /// <summary>
        /// Executed when the Editor's playmode changes allowing for capture of required data
        /// </summary>
        static void OnPlaymodeStateChanged()
        {
            if (UnityEngine.Application.isPlaying && EditorApplication.isPlayingOrWillChangePlaymode)
            {
                UpdateLaunchFile();
            }
        }

        /// <summary>
        /// Detect when scripts are reloaded and relink playmode detection
        /// </summary>
        [UnityEditor.Callbacks.DidReloadScripts()]
        static void OnScriptReload()
        {
            EditorApplication.playmodeStateChanged -= OnPlaymodeStateChanged;
            EditorApplication.playmodeStateChanged += OnPlaymodeStateChanged;
        }

        /// <summary>
        /// Remove extra/erroneous lines from a file.
        static void ScrubFile(string path)
        {
            string[] lines = File.ReadAllLines(path);
            System.Collections.Generic.List<string> newLines = new System.Collections.Generic.List<string>();
            for (int i = 0; i < lines.Length; i++)
            {
                // Check Empty
                if (string.IsNullOrEmpty(lines[i].Trim()) || lines[i].Trim() == "\t" || lines[i].Trim() == "\t\t")
                {

                }
                else
                {
                    newLines.Add(lines[i]);
                }
            }
            File.WriteAllLines(path, newLines.ToArray());
        }

        /// <summary>
        /// Remove extra/erroneous data from project file (content).
        /// </summary>
        static string ScrubProjectContent(string content)
        {
            if (content.Length == 0)
                return "";

#if !UNITY_EDITOR_WIN
            // Moved to 3.5, 2.0 is legacy.
            if (content.IndexOf("<TargetFrameworkVersion>v3.5</TargetFrameworkVersion>") != -1)
            {
                content = Regex.Replace(content, "<TargetFrameworkVersion>v3.5</TargetFrameworkVersion>", "<TargetFrameworkVersion>v4.5</TargetFrameworkVersion>");
            }
#endif

            string targetPath = "";// "<TargetPath>Temp" + Path.DirectorySeparatorChar + "bin" + Path.DirectorySeparatorChar + "Debug" + Path.DirectorySeparatorChar + "</TargetPath>"; //OutputPath
            string langVersion = "<LangVersion>default</LangVersion>";


            bool found = true;
            int location = 0;
            string addedOptions = "";
            int startLocation = -1;
            int endLocation = -1;
            int endLength = 0;

            while (found)
            {
                startLocation = -1;
                endLocation = -1;
                endLength = 0;
                addedOptions = "";
                startLocation = content.IndexOf("<PropertyGroup", location);

                if (startLocation != -1)
                {

                    endLocation = content.IndexOf("</PropertyGroup>", startLocation);
                    endLength = (endLocation - startLocation);


                    if (endLocation == -1)
                    {
                        found = false;
                        continue;
                    }
                    else
                    {
                        found = true;
                        location = endLocation;
                    }

                    if (content.Substring(startLocation, endLength).IndexOf("<TargetPath>") == -1)
                    {
                        addedOptions += "\n\r\t" + targetPath + "\n\r";
                    }

                    if (content.Substring(startLocation, endLength).IndexOf("<LangVersion>") == -1)
                    {
                        addedOptions += "\n\r\t" + langVersion + "\n\r";
                    }

                    if (!string.IsNullOrEmpty(addedOptions))
                    {
                        content = content.Substring(0, endLocation) + addedOptions + content.Substring(endLocation);
                    }
                }
                else
                {
                    found = false;
                }
            }

            return content;
        }

        /// <summary>
        /// Remove extra/erroneous data from solution file (content).
        /// </summary>
        static string ScrubSolutionContent(string content)
        {
            // Replace Solution Version
            content = content.Replace(
                "Microsoft Visual Studio Solution File, Format Version 11.00\r\n# Visual Studio 2008\r\n",
                "\r\nMicrosoft Visual Studio Solution File, Format Version 12.00\r\n# Visual Studio 2012");

            // Remove Solution Properties (Unity Junk)
            int startIndex = content.IndexOf("GlobalSection(SolutionProperties) = preSolution");
            if (startIndex != -1)
            {
                int endIndex = content.IndexOf("EndGlobalSection", startIndex);
                content = content.Substring(0, startIndex) + content.Substring(endIndex + 16);
            }

            return content;
        }
       
        /// <summary>
        /// Update Visual Studio Code Launch file
        /// </summary>
        static void UpdateLaunchFile()
        {
            if (!VSCode.Enabled)
            {
                return;
            }
            else if (VSCode.UseUnityDebugger)
            {
                if (!Directory.Exists(VSCode.SettingsFolder))
                    System.IO.Directory.CreateDirectory(VSCode.SettingsFolder);

                // Write out proper formatted JSON (hence no more SimpleJSON here)
                string fileContent = "{\n\t\"version\": \"0.2.0\",\n\t\"configurations\": [\n\t\t{\n\t\t\t\"name\": \"Unity Editor\",\n\t\t\t\"type\": \"unity\",\n\t\t\t\"request\": \"launch\"\n\t\t},\n\t\t{\n\t\t\t\"name\": \"Windows Player\",\n\t\t\t\"type\": \"unity\",\n\t\t\t\"request\": \"launch\"\n\t\t},\n\t\t{\n\t\t\t\"name\": \"OSX Player\",\n\t\t\t\"type\": \"unity\",\n\t\t\t\"request\": \"launch\"\n\t\t},\n\t\t{\n\t\t\t\"name\": \"Linux Player\",\n\t\t\t\"type\": \"unity\",\n\t\t\t\"request\": \"launch\"\n\t\t},\n\t\t{\n\t\t\t\"name\": \"iOS Player\",\n\t\t\t\"type\": \"unity\",\n\t\t\t\"request\": \"launch\"\n\t\t},\n\t\t{\n\t\t\t\"name\": \"Android Player\",\n\t\t\t\"type\": \"unity\",\n\t\t\t\"request\": \"launch\"\n\n\t\t}\n\t]\n}";
                File.WriteAllText(VSCode.LaunchPath, fileContent);
            }
            else if (VSCode.WriteLaunchFile)
            {
                int port = GetDebugPort();
                if (port > -1)
                {
                    if (!Directory.Exists(VSCode.SettingsFolder))
                        System.IO.Directory.CreateDirectory(VSCode.SettingsFolder);

                    // Write out proper formatted JSON (hence no more SimpleJSON here)
                    string fileContent = "{\n\t\"version\":\"0.2.0\",\n\t\"configurations\":[ \n\t\t{\n\t\t\t\"name\":\"Unity\",\n\t\t\t\"type\":\"mono\",\n\t\t\t\"request\":\"attach\",\n\t\t\t\"address\":\"localhost\",\n\t\t\t\"port\":" + port + "\n\t\t}\n\t]\n}";
                    File.WriteAllText(VSCode.LaunchPath, fileContent);

                    if (VSCode.Debug)
                    {
                        UnityEngine.Debug.Log("[VSCode] Debug Port Found (" + port + ")");
                    }
                }
                else
                {
                    if (VSCode.Debug)
                    {
                        UnityEngine.Debug.LogWarning("[VSCode] Unable to determine debug port.");
                    }
                }
            }
        }

        /// <summary>
        /// Update Unity Editor Preferences
        /// </summary>
        /// <param name="enabled">Should we turn on this party!</param>
        static void UpdateUnityPreferences(bool enabled)
        {
            if (enabled)
            {
                // App
                if (EditorPrefs.GetString("kScriptsDefaultApp") != CodePath)
                {
                    EditorPrefs.SetString("VSCode_PreviousApp", EditorPrefs.GetString("kScriptsDefaultApp"));
                }
                EditorPrefs.SetString("kScriptsDefaultApp", CodePath);

                // Arguments
                if (EditorPrefs.GetString("kScriptEditorArgs") != "-r -g \"$(File):$(Line)\"")
                {
                    EditorPrefs.SetString("VSCode_PreviousArgs", EditorPrefs.GetString("kScriptEditorArgs"));
                }

                EditorPrefs.SetString("kScriptEditorArgs", "-r -g \"$(File):$(Line)\"");
                EditorPrefs.SetString("kScriptEditorArgs" + CodePath, "-r -g \"$(File):$(Line)\"");


                // MonoDevelop Solution
                if (EditorPrefs.GetBool("kMonoDevelopSolutionProperties", false))
                {
                    EditorPrefs.SetBool("VSCode_PreviousMD", true);
                }
                EditorPrefs.SetBool("kMonoDevelopSolutionProperties", false);

                // Support Unity Proj (JS)
                if (EditorPrefs.GetBool("kExternalEditorSupportsUnityProj", false))
                {
                    EditorPrefs.SetBool("VSCode_PreviousUnityProj", true);
                }
                EditorPrefs.SetBool("kExternalEditorSupportsUnityProj", false);

                if (!EditorPrefs.GetBool("AllowAttachedDebuggingOfEditor", false))
                {
                    EditorPrefs.SetBool("VSCode_PreviousAttach", false);
                }
                EditorPrefs.SetBool("AllowAttachedDebuggingOfEditor", true);
                
            }
            else
            {
                // Restore previous app
                if (!string.IsNullOrEmpty(EditorPrefs.GetString("VSCode_PreviousApp")))
                {
                    EditorPrefs.SetString("kScriptsDefaultApp", EditorPrefs.GetString("VSCode_PreviousApp"));
                }

                // Restore previous args
                if (!string.IsNullOrEmpty(EditorPrefs.GetString("VSCode_PreviousArgs")))
                {
                    EditorPrefs.SetString("kScriptEditorArgs", EditorPrefs.GetString("VSCode_PreviousArgs"));
                }

                // Restore MD setting
                if (EditorPrefs.GetBool("VSCode_PreviousMD", false))
                {
                    EditorPrefs.SetBool("kMonoDevelopSolutionProperties", true);
                }

                // Restore MD setting
                if (EditorPrefs.GetBool("VSCode_PreviousUnityProj", false))
                {
                    EditorPrefs.SetBool("kExternalEditorSupportsUnityProj", true);
                }

                // Always leave editor attaching on, I know, it solves the problem of needing to restart for this
                // to actually work
                EditorPrefs.SetBool("AllowAttachedDebuggingOfEditor", true);
                
            }

            FixUnityPreferences();
        }

        /// <summary>
        /// Determines if the current path to the code executable is valid or not (exists)
        /// </summary>
        static bool VSCodeExists(string curPath)
        {
            #if UNITY_EDITOR_OSX
            return System.IO.Directory.Exists(curPath);
            #else
            System.IO.FileInfo code = new System.IO.FileInfo(curPath);
            return code.Exists;
            #endif
        }

        /// <summary>
        /// Write Default Workspace Settings
        /// </summary>
        static void WriteWorkspaceSettings()
        {
            if (Debug)
            {
                UnityEngine.Debug.Log("[VSCode] Workspace Settings Written");
            }

            if (!Directory.Exists(VSCode.SettingsFolder))
            {
                System.IO.Directory.CreateDirectory(VSCode.SettingsFolder);
            }

            string exclusions =
                "{\n" +
                "\t\"files.exclude\":\n" +
                "\t{\n" +
                // Hidden Files
                "\t\t\"**/.DS_Store\":true,\n" +
                "\t\t\"**/.git\":true,\n" +
                "\t\t\"**/.gitignore\":true,\n" +
                "\t\t\"**/.gitattributes\":true,\n" +
                "\t\t\"**/.gitmodules\":true,\n" +
                "\t\t\"**/.svn\":true,\n" +


                // Project Files
                "\t\t\"**/*.booproj\":true,\n" +
                "\t\t\"**/*.pidb\":true,\n" +
                "\t\t\"**/*.suo\":true,\n" +
                "\t\t\"**/*.user\":true,\n" +
                "\t\t\"**/*.userprefs\":true,\n" +
                "\t\t\"**/*.unityproj\":true,\n" +
                "\t\t\"**/*.dll\":true,\n" +
                "\t\t\"**/*.exe\":true,\n" +

                // Media Files
                "\t\t\"**/*.pdf\":true,\n" +

                // Audio
                "\t\t\"**/*.mid\":true,\n" +
                "\t\t\"**/*.midi\":true,\n" +
                "\t\t\"**/*.wav\":true,\n" +

                // Textures
                "\t\t\"**/*.gif\":true,\n" +
                "\t\t\"**/*.ico\":true,\n" +
                "\t\t\"**/*.jpg\":true,\n" +
                "\t\t\"**/*.jpeg\":true,\n" +
                "\t\t\"**/*.png\":true,\n" +
                "\t\t\"**/*.psd\":true,\n" +
                "\t\t\"**/*.tga\":true,\n" +
                "\t\t\"**/*.tif\":true,\n" +
                "\t\t\"**/*.tiff\":true,\n" +

                // Models
                "\t\t\"**/*.3ds\":true,\n" +
                "\t\t\"**/*.3DS\":true,\n" +
                "\t\t\"**/*.fbx\":true,\n" +
                "\t\t\"**/*.FBX\":true,\n" +
                "\t\t\"**/*.lxo\":true,\n" +
                "\t\t\"**/*.LXO\":true,\n" +
                "\t\t\"**/*.ma\":true,\n" +
                "\t\t\"**/*.MA\":true,\n" +
                "\t\t\"**/*.obj\":true,\n" +
                "\t\t\"**/*.OBJ\":true,\n" +

                // Unity File Types
                "\t\t\"**/*.asset\":true,\n" +
                "\t\t\"**/*.cubemap\":true,\n" +
                "\t\t\"**/*.flare\":true,\n" +
                "\t\t\"**/*.mat\":true,\n" +
                "\t\t\"**/*.meta\":true,\n" +
                "\t\t\"**/*.prefab\":true,\n" +
                "\t\t\"**/*.unity\":true,\n" +

                // Folders
                "\t\t\"build/\":true,\n" +
                "\t\t\"Build/\":true,\n" +
                "\t\t\"Library/\":true,\n" +
                "\t\t\"library/\":true,\n" +
                "\t\t\"obj/\":true,\n" +
                "\t\t\"Obj/\":true,\n" +
                "\t\t\"ProjectSettings/\":true,\r" +
                "\t\t\"temp/\":true,\n" +
                "\t\t\"Temp/\":true\n" +
                "\t}\n" +
                "}";

            // Dont like the replace but it fixes the issue with the JSON
            File.WriteAllText(VSCode.SettingsPath, exclusions);
        }

        #endregion
    }

    /// <summary>
    /// VSCode Asset AssetPostprocessor
    /// <para>This will ensure any time that the project files are generated the VSCode versions will be made</para>
    /// </summary>
    /// <remarks>Undocumented Event</remarks>
    public class VSCodeAssetPostprocessor : AssetPostprocessor
    {
        /// <summary>
        /// On documented, project generation event callback
        /// </summary>
        private static void OnGeneratedCSProjectFiles()
        {
            // Force execution of VSCode update
            VSCode.UpdateSolution();
        }
    }
}