// Copyright 1998-2014 Epic Games, Inc. All Rights Reserved.
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.IO;
using System.Reflection;
using AutomationTool;
using OneSky;
using EpicGames.OneSkyLocalization.Config;

class LauncherLocalization : BuildCommand
{
    
    public override void ExecuteBuild()
    {

        var EditorExe = CombinePaths(CmdEnv.LocalRoot, @"Engine/Binaries/Win64/UE4Editor-Cmd.exe");

        if (P4Enabled)
        {
            Log("Sync necessary content to head revision");
			P4.Sync(P4Env.BuildRootP4 + "/Engine/Config/...");
			P4.Sync(P4Env.BuildRootP4 + "/Engine/Content/...");
			P4.Sync(P4Env.BuildRootP4 + "/Engine/Source/...");

            P4.Sync(P4Env.BuildRootP4 + "/Engine/Programs/NoRedist/UnrealEngineLauncher/Config/...");
            P4.Sync(P4Env.BuildRootP4 + "/Engine/Programs/NoRedist/UnrealEngineLauncher/Content/...");
            //P4.Sync(P4Env.BuildRootP4 + "/Engine/Source/..."); <- takes care of syncing Launcher source already

            Log("Localize from label {0}", P4Env.LabelToSync);            
        }

        OneSkyConfigData OneSkyConfig = OneSkyConfigHelper.Find("OneSkyConfig_EpicGames");
        var oneSkyService = new OneSkyService(OneSkyConfig.ApiKey, OneSkyConfig.ApiSecret);

        // Export Launcher text from OneSky
        {
            var launcherGroup = GetLauncherGroup(oneSkyService);
            var appProject = GetAppProject(oneSkyService);
            var appFile = appProject.UploadedFiles.FirstOrDefault(f => f.Filename == "App.po");

            //Export
            if (appFile != null)
            {
                ExportFileToDirectory(appFile, new DirectoryInfo(CmdEnv.LocalRoot + "/Engine/Programs/NoRedist/UnrealEngineLauncher/Content/Localization/App"), launcherGroup.EnabledCultures);
            }
        }

        // Setup editor arguments for SCC.
        string EditorArguments = String.Empty;
        if (P4Enabled)
        {
            EditorArguments = String.Format("-SCCProvider={0} -P4Port={1} -P4User={2} -P4Client={3} -P4Passwd={4}", "Perforce", P4Env.P4Port, P4Env.User, P4Env.Client, P4.GetAuthenticationToken());
        }
        else
        {
            EditorArguments = String.Format("-SCCProvider={0}", "None");
        }

        // Setup commandlet arguments for SCC.
        string CommandletSCCArguments = String.Empty;
        if (P4Enabled) { CommandletSCCArguments += (string.IsNullOrEmpty(CommandletSCCArguments) ? "" : " ") + "-EnableSCC"; }
        if (!AllowSubmit) { CommandletSCCArguments += (string.IsNullOrEmpty(CommandletSCCArguments) ? "" : " ") + "-DisableSCCSubmit"; }

        // Setup commandlet arguments with configurations.
        var CommandletArgumentSets = new string[] 
                {
                    String.Format("-config={0}", @"../../../Engine/Programs/NoRedist/UnrealEngineLauncher/Config/Localization/App.ini") + (string.IsNullOrEmpty(CommandletSCCArguments) ? "" : " " + CommandletSCCArguments),
                    String.Format("-config={0}", @"../../../Engine/Programs/NoRedist/UnrealEngineLauncher/Config/Localization/WordCount.ini"),
                };

        // Execute commandlet for each set of arguments.
        foreach (var CommandletArguments in CommandletArgumentSets)
        {
            Log("Localization for {0} {1}", EditorArguments, CommandletArguments);

            Log("Running UE4Editor to generate Localization data");

            string Arguments = String.Format("-run=GatherText {0} {1}", EditorArguments, CommandletArguments);
            var RunResult = Run(EditorExe, Arguments);

            if (RunResult.ExitCode != 0)
            {
                throw new AutomationException("Error while executing localization commandlet '{0}'", Arguments);
            }
        }

        // Upload Launcher text to OneSky
        UploadDirectoryToProject(GetAppProject(oneSkyService), new DirectoryInfo(CmdEnv.LocalRoot + "/Engine/Programs/NoRedist/UnrealEngineLauncher/Content/Localization/App"), "*.po");
    }

    private static ProjectGroup GetLauncherGroup(OneSkyService oneSkyService)
    {
        var launcherGroup = oneSkyService.ProjectGroups.FirstOrDefault(g => g.Name == "Launcher");

        if (launcherGroup == null)
        {
            launcherGroup = new ProjectGroup("Launcher", new CultureInfo("en"));
            oneSkyService.ProjectGroups.Add(launcherGroup);
        }

        return launcherGroup;
    }

    private static OneSky.Project GetAppProject(OneSkyService oneSkyService)
    {
        var launcherGroup = GetLauncherGroup(oneSkyService);

        OneSky.Project appProject = launcherGroup.Projects.FirstOrDefault(p => p.Name == "App");

        if (appProject == null)
        {
            ProjectType projectType = oneSkyService.ProjectTypes.First(pt => pt.Code == "website");

            appProject = new OneSky.Project("App", "The core application text that ships with the Launcher", projectType);
            launcherGroup.Projects.Add(appProject);
        }

        return appProject;
    }

    private static void ExportFileToDirectory(UploadedFile file, DirectoryInfo destination, IEnumerable<CultureInfo> cultures)
    {
        foreach (var culture in cultures)
        {
            var cultureDirectory = new DirectoryInfo(Path.Combine(destination.FullName, culture.Name));
            if (!cultureDirectory.Exists)
            {
                cultureDirectory.Create();
            }

            using (var memoryStream = new MemoryStream())
            {
                var exportFile = new FileInfo(Path.Combine(cultureDirectory.FullName, file.Filename));

                var exportTranslationState = file.ExportTranslation(culture, memoryStream).Result;
                if (exportTranslationState == UploadedFile.ExportTranslationState.Success)
                {
                    memoryStream.Position = 0;
                    using (Stream fileStream = File.OpenWrite(exportFile.FullName))
                    {
                        memoryStream.CopyTo(fileStream);
                        Console.WriteLine("[SUCCESS] Exporting: " + exportFile.FullName + " Locale: " + culture.Name);
                    }
                }
                else if (exportTranslationState == UploadedFile.ExportTranslationState.NoContent)
                {
                    Console.WriteLine("[WARNING] Exporting: " + exportFile.FullName + " Locale: " + culture.Name + " has no translations!");
                }
                else
                {
                    Console.WriteLine("[FAILED] Exporting: " + exportFile.FullName + " Locale: " + culture.Name);
                }
            }
        }
    }

    static void UploadDirectoryToProject(OneSky.Project project, DirectoryInfo directory, string fileExtension)
    {
        foreach (var file in Directory.GetFiles(directory.FullName, fileExtension, SearchOption.AllDirectories))
        {
            DirectoryInfo parentDirectory = Directory.GetParent(file);
            string localeName = parentDirectory.Name;
            string currentFile = file;

            using (var fileStream = File.OpenRead(currentFile))
            {
                // Read the BOM
                var bom = new byte[3];
                fileStream.Read(bom, 0, 3);

                //We want to ignore the utf8 BOM
                if (bom[0] != 0xef || bom[1] != 0xbb || bom[2] != 0xbf)
                {
                    fileStream.Position = 0;
                }

                Console.WriteLine("Uploading: " + currentFile + " Locale: " + localeName);
                var uploadedFile = project.Upload(Path.GetFileName(currentFile), fileStream, new CultureInfo(localeName)).Result;

                if (uploadedFile == null)
                {
                    Console.WriteLine("[FAILED] Uploading: " + currentFile + " Locale: " + localeName);
                }
                else
                {
                    Console.WriteLine("[SUCCESS] Uploading: " + currentFile + " Locale: " + localeName);
                }
            }
        }
    }
}


namespace EpicGames.OneSkyLocalization.Config
{
    /// <summary>
    /// Class for retrieving OneSky localization configuration data
    /// </summary>
    public class OneSkyConfigHelper
    {
        // List of configs is cached off for fetching from multiple times
        private static Dictionary<string, OneSkyConfigData> Configs;

        public static OneSkyConfigData Find(string ConfigName)
        {
            if (Configs == null)
            {
                // Load all secret configs by trying to instantiate all classes derived from OneSkyConfigData from all loaded DLLs.
                // Note that we're using the default constructor on the secret config types.
                Configs = new Dictionary<string, OneSkyConfigData>();
                Assembly[] LoadedAssemblies = AppDomain.CurrentDomain.GetAssemblies();
                foreach (var Dll in LoadedAssemblies)
                {
                    Type[] AllTypes = Dll.GetTypes();
                    foreach (var PotentialConfigType in AllTypes)
                    {
                        if (PotentialConfigType != typeof(OneSkyConfigData) && typeof(OneSkyConfigData).IsAssignableFrom(PotentialConfigType))
                        {
                            try
                            {
                                OneSkyConfigData Config = Activator.CreateInstance(PotentialConfigType) as OneSkyConfigData;
                                if (Config != null)
                                {
                                    Configs.Add(Config.Name, Config);
                                }
                            }
                            catch
                            {
                                BuildCommand.LogWarning("Unable to create OneSky config data: {0}", PotentialConfigType.Name);
                            }
                        }
                    }
                }
            }
            OneSkyConfigData LoadedConfig;
            Configs.TryGetValue(ConfigName, out LoadedConfig);
            if (LoadedConfig == null)
            {
                throw new AutomationException("Unable to find requested OneSky config data: {0}", ConfigName);
            }
            return LoadedConfig;
        }
    }

    /// <summary>
    /// Class for storing OneSky Localization configuration data
    /// </summary>
    public class OneSkyConfigData
    {
        public OneSkyConfigData(string InName, string InApiKey, string InApiSecret)
        {
            Name = InName;
            ApiKey = InApiKey;
            ApiSecret = InApiSecret;
        }

        public string Name;
        public string ApiKey;
        public string ApiSecret;

        public void SpewValues()
        {
            CommandUtils.Log("Name : {0}", Name);
            CommandUtils.Log("ApiKey : {0}", ApiKey);
            //CommandUtils.Log("ApiSecret : {0}", ApiSecret);  // This should probably never be revealed.
        }
    }
}