// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.IO;

namespace UnrealBuildTool
{
    class HTML5Platform : UEBuildPlatform
    {
        // use -win32 for win32 builds. ( build html5 platform as a win32 binary for debugging )
        [XmlConfig]
        public static string HTML5Architecture = "";


        static private string TargetPlatformName = "HTML5";

		// This is the SDK version we support in //CarefullyRedist.
		// May include minor revisions or descriptions that a default install from SDK_Manager won't have.
		// e.g. 1.600_Patch001, or 1.610.001.  The SDK_Manager always installs minor revision patches straight into
		// the default major revision folder.
		static private string ExpectedSDKVersion = "1.25.0";

		/** 
		 * Whether platform supports switching SDKs during runtime
		 * 
		 * @return true if supports
		 */
		protected override bool PlatformSupportsAutoSDKs()
		{
			return true;
		}
		
		public override string GetSDKTargetPlatformName()
        {
            return TargetPlatformName;
        }

		/** 
		 * Returns SDK string as required by the platform 
		 * 
		 * @return Valid SDK string
		 */
		protected override string GetRequiredSDKString()
		{
			if (HTML5SDKInfo.IsSDKVersionOverridden())
				return HTML5SDKInfo.OverriddenSDKVersion();
			return ExpectedSDKVersion;
		}

		protected override String GetRequiredScriptVersionString()
		{
			return "3.0";
		}
		
		// The current architecture - affects everything about how UBT operates on HTML5
        public override string GetActiveArchitecture()
        {
            // by default, use an empty architecture (which is really just a modifier to the platform for some paths/names)
            return HTML5Architecture;
        }

        // F5 should always try to run the Win32 version
        public override string ModifyNMakeOutput(string ExeName)
        {
            // nmake Run should always run the win32 version
            return Path.ChangeExtension(ExeName+"-win32", ".exe");
        }

        /**
         *	Whether the required external SDKs are installed for this platform
         */
        protected override SDKStatus HasRequiredManualSDKInternal()
        {
			// if any autosdk setup has been done then the local process environment is suspect
			if (HasSetupAutoSDK())
			{
				return SDKStatus.Invalid;
            }
			if (!HTML5SDKInfo.IsSDKInstalled())
			{
				return SDKStatus.Invalid;
			}
            try
            {
                int InstalledVersion = Convert.ToInt32(HTML5SDKInfo.EmscriptenVersion().Replace(".","")); 
                int RequiredVersion = Convert.ToInt32(GetRequiredSDKString().Replace(".","")); 

                if (InstalledVersion >= RequiredVersion)
                {
                    return SDKStatus.Valid;
                }
                else
                {
					Console.WriteLine("EMSCRIPTEN sdk " + HTML5SDKInfo.EmscriptenVersion() + " found which is older than " + RequiredVersion + " Please install the latest emscripten SDK");
                    return SDKStatus.Invalid;
                }
            }
            catch (Exception /*ex*/)
            {
                 return SDKStatus.Invalid;
            }
        }

        public override bool CanUseXGE()
        {
			return (GetActiveArchitecture() == "-win32");
        }

        /**
         *	Register the platform with the UEBuildPlatform class
         */
        protected override void RegisterBuildPlatformInternal()
        {
            // Make sure the SDK is installed
            if ((ProjectFileGenerator.bGenerateProjectFiles == true) || (HasRequiredSDKsInstalled() == SDKStatus.Valid))
            {
                bool bRegisterBuildPlatform = true;

                // make sure we have the HTML5 files; if not, then this user doesn't really have HTML5 access/files, no need to compile HTML5!
                string EngineSourcePath = Path.Combine(ProjectFileGenerator.EngineRelativePath, "Source");
                string HTML5TargetPlatformFile = Path.Combine(EngineSourcePath, "Developer", "HTML5", "HTML5TargetPlatform", "HTML5TargetPlatform.Build.cs");
                if ((File.Exists(HTML5TargetPlatformFile) == false))
                {
                    bRegisterBuildPlatform = false;
                    Log.TraceWarning("Missing required components (.... HTML5TargetPlatformFile, others here...). Check source control filtering, or try resyncing.");
                }

                if (bRegisterBuildPlatform == true)
                {
                    // Register this build platform for HTML5
                    Log.TraceVerbose("        Registering for {0}", UnrealTargetPlatform.HTML5.ToString());
                    UEBuildPlatform.RegisterBuildPlatform(UnrealTargetPlatform.HTML5, this);
                    if (GetActiveArchitecture() == "-win32")
                    {
                        UEBuildPlatform.RegisterPlatformWithGroup(UnrealTargetPlatform.HTML5, UnrealPlatformGroup.Simulator);
                    }
                    else
                    {
                        UEBuildPlatform.RegisterPlatformWithGroup(UnrealTargetPlatform.HTML5, UnrealPlatformGroup.Device);
                    }
                }
            }

        }

        /**
         *	Retrieve the CPPTargetPlatform for the given UnrealTargetPlatform
         *
         *	@param	InUnrealTargetPlatform		The UnrealTargetPlatform being build
         *	
         *	@return	CPPTargetPlatform			The CPPTargetPlatform to compile for
         */
        public override CPPTargetPlatform GetCPPTargetPlatform(UnrealTargetPlatform InUnrealTargetPlatform)
        {
            switch (InUnrealTargetPlatform)
            {
                case UnrealTargetPlatform.HTML5:
                    return CPPTargetPlatform.HTML5;
            }
            throw new BuildException("HTML5Platform::GetCPPTargetPlatform: Invalid request for {0}", InUnrealTargetPlatform.ToString());
        }

        /**
         *	Get the extension to use for the given binary type
         *	
         *	@param	InBinaryType		The binary type being built
         *	
         *	@return	string				The binary extension (ie 'exe' or 'dll')
         */
        public override string GetBinaryExtension(UEBuildBinaryType InBinaryType)
        {
            if (GetActiveArchitecture() == "-win32")
            {
                switch (InBinaryType)
                {
                    case UEBuildBinaryType.DynamicLinkLibrary:
                        return ".dll";
                    case UEBuildBinaryType.Executable:
                        return ".exe";
                    case UEBuildBinaryType.StaticLibrary:
                        return ".lib";
                    case UEBuildBinaryType.Object:
                        return ".o";
                    case UEBuildBinaryType.PrecompiledHeader:
                        return ".gch";
                }
                return base.GetBinaryExtension(InBinaryType);
            }
            else
            {
                switch (InBinaryType)
                {
                    case UEBuildBinaryType.DynamicLinkLibrary:
                        return ".js";
                    case UEBuildBinaryType.Executable:
                        return ".js";
                    case UEBuildBinaryType.StaticLibrary:
                        return ".bc";
                    case UEBuildBinaryType.Object:
                        return ".bc";
                    case UEBuildBinaryType.PrecompiledHeader:
                        return ".gch";
                }

                return base.GetBinaryExtension(InBinaryType);
            }
        }

        /**
         *	Get the extension to use for debug info for the given binary type
         *	
         *	@param	InBinaryType		The binary type being built
         *	
         *	@return	string				The debug info extension (i.e. 'pdb')
         */
        public override string GetDebugInfoExtension(UEBuildBinaryType InBinaryType)
        {
            if (GetActiveArchitecture() == "-win32")
            {
                switch (InBinaryType)
                {
                    case UEBuildBinaryType.DynamicLinkLibrary:
                        return ".pdb";
                    case UEBuildBinaryType.Executable:
                        return ".pdb";
                }
                return "";
            }
            else
            {
                return "";
            }
        }

        /**
         *	Gives the platform a chance to 'override' the configuration settings 
         *	that are overridden on calls to RunUBT.
         *	
         *	@param	InPlatform			The UnrealTargetPlatform being built
         *	@param	InConfiguration		The UnrealTargetConfiguration being built
         *	
         *	@return	bool				true if debug info should be generated, false if not
         */
        public override void ResetBuildConfiguration(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration)
        {
            ValidateUEBuildConfiguration();
        }

        /**
         *	Validate the UEBuildConfiguration for this platform
         *	This is called BEFORE calling UEBuildConfiguration to allow setting 
         *	various fields used in that function such as CompileLeanAndMean...
         */
        public override void ValidateUEBuildConfiguration()
        {
            UEBuildConfiguration.bCompileLeanAndMeanUE = true;
            UEBuildConfiguration.bCompileAPEX = false;
            UEBuildConfiguration.bCompilePhysX = true;
            UEBuildConfiguration.bRuntimePhysicsCooking = false;
            UEBuildConfiguration.bCompileSimplygon = false;
            UEBuildConfiguration.bCompileICU = true;
            UEBuildConfiguration.bCompileForSize = true;
        }

        /**
         * Whether this platform should build a monolithic binary
         */
        public override bool ShouldCompileMonolithicBinary(UnrealTargetPlatform InPlatform)
        {
            // This platform currently always compiles monolithic
            return true;
        }

        /**
         *	Whether PDB files should be used
         *	
         *	@param	InPlatform			The CPPTargetPlatform being built
         *	@param	InConfiguration		The CPPTargetConfiguration being built
         *	@param	bInCreateDebugInfo	true if debug info is getting create, false if not
         *	
         *	@return	bool	true if PDB files should be used, false if not
         */
        public override bool ShouldUsePDBFiles(CPPTargetPlatform Platform, CPPTargetConfiguration Configuration, bool bCreateDebugInfo)
        {
            return bCreateDebugInfo;
        }

        /**
         *	Whether PCH files should be used
         *	
         *	@param	InPlatform			The CPPTargetPlatform being built
         *	@param	InConfiguration		The CPPTargetConfiguration being built
         *	
         *	@return	bool				true if PCH files should be used, false if not
         */
        public override bool ShouldUsePCHFiles(CPPTargetPlatform Platform, CPPTargetConfiguration Configuration)
        {
            return false;
        }

        /**
         *	Whether the editor should be built for this platform or not
         *	
         *	@param	InPlatform		The UnrealTargetPlatform being built
         *	@param	InConfiguration	The UnrealTargetConfiguration being built
         *	@return	bool			true if the editor should be built, false if not
         */
        public override bool ShouldNotBuildEditor(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration)
        {
            return true;
        }

        public override bool BuildRequiresCookedData(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration)
        {
            return true;
        }

        /**
         *	Modify the newly created module passed in for this platform.
         *	This is not required - but allows for hiding details of a
         *	particular platform.
         *	
         *	@param	InModule		The newly loaded module
         *	@param	Target			The target being build
         */
        public override void ModifyNewlyLoadedModule(UEBuildModule InModule, TargetInfo Target)
        {
			if (Target.Platform == UnrealTargetPlatform.HTML5)
            {
                if (InModule.ToString() == "Core")
                {
                    InModule.AddPublicIncludePath("Runtime/Core/Public/HTML5");
                    InModule.AddPublicDependencyModule("zlib");
                }
                else if (InModule.ToString() == "Engine")
                {
                    InModule.AddPrivateDependencyModule("zlib");
                    InModule.AddPrivateDependencyModule("UElibPNG");
                    InModule.AddPublicDependencyModule("UEOgg");
                    InModule.AddPublicDependencyModule("Vorbis");
                }
            }
            else if (Target.Platform == UnrealTargetPlatform.Win32 || Target.Platform == UnrealTargetPlatform.Win64 || Target.Platform == UnrealTargetPlatform.Mac )
            {
				// allow standalone tools to use targetplatform modules, without needing Engine
				if ((!UEBuildConfiguration.bBuildRequiresCookedData
                    && InModule.ToString() == "Engine"
                    && UEBuildConfiguration.bBuildDeveloperTools)
                    || UEBuildConfiguration.bForceBuildTargetPlatforms)
                {
                    InModule.AddPlatformSpecificDynamicallyLoadedModule("HTML5TargetPlatform");
                }
            }
        }


        /**
         *	Setup the target environment for building
         *	
         *	@param	InBuildTarget		The target being built
         */
        public override void SetUpEnvironment(UEBuildTarget InBuildTarget)
        {
            if (GetActiveArchitecture() == "-win32")
                InBuildTarget.GlobalLinkEnvironment.Config.ExcludedLibraries.Add("LIBCMT");

            InBuildTarget.GlobalCompileEnvironment.Config.Definitions.Add("PLATFORM_HTML5=1");
            if (InBuildTarget.GlobalCompileEnvironment.Config.Target.Architecture == "-win32")
            {
                InBuildTarget.GlobalCompileEnvironment.Config.Definitions.Add("PLATFORM_HTML5_WIN32=1");
                InBuildTarget.GlobalLinkEnvironment.Config.AdditionalLibraries.Add("delayimp.lib");
            }
            else
            {
                InBuildTarget.GlobalCompileEnvironment.Config.Definitions.Add("PLATFORM_HTML5_BROWSER=1");
            }

            // @todo needed?
            InBuildTarget.GlobalCompileEnvironment.Config.Definitions.Add("UNICODE");
            InBuildTarget.GlobalCompileEnvironment.Config.Definitions.Add("_UNICODE");
            InBuildTarget.GlobalCompileEnvironment.Config.Definitions.Add("WITH_AUTOMATION_WORKER=0");
            InBuildTarget.GlobalCompileEnvironment.Config.Definitions.Add("REQUIRES_ALIGNED_INT_ACCESS");
            InBuildTarget.GlobalCompileEnvironment.Config.Definitions.Add("WITH_OGGVORBIS=1");
            InBuildTarget.GlobalCompileEnvironment.Config.Definitions.Add("USE_SCENE_LOCK=0");
            BuildConfiguration.bDeployAfterCompile = true;

        }

        /**
         *	Whether this platform should create debug information or not
         *	
         *	@param	InPlatform			The UnrealTargetPlatform being built
         *	@param	InConfiguration		The UnrealTargetConfiguration being built
         *	
         *	@return	bool				true if debug info should be generated, false if not
         */
        public override bool ShouldCreateDebugInfo(UnrealTargetPlatform Platform, UnrealTargetConfiguration Configuration)
        {
            switch (Configuration)
            {
                case UnrealTargetConfiguration.Development:
                case UnrealTargetConfiguration.Shipping:
                case UnrealTargetConfiguration.Test:
                    return !BuildConfiguration.bOmitPCDebugInfoInDevelopment;
                case UnrealTargetConfiguration.Debug:
                default:
                    // We don't need debug info for Emscripten, and it causes a bunch of issues with linking
                    return true;
            };
        }

        /**
         *	Setup the binaries for this specific platform.
         *	
         *	@param	InBuildTarget		The target being built
         */
        public override void SetupBinaries(UEBuildTarget InBuildTarget)
        {
// 			InBuildTarget.ExtraModuleNames.Add("ES2RHI");
        }
    }
}