// Copyright Epic Games, Inc. All Rights Reserved.

using System;
using System.Collections.Generic;
using System.Text;
using EpicGames.Core;
using Microsoft.Extensions.Logging;

namespace UnrealBuildTool
{
	/// <summary>
	/// Base class for platform-specific project generators
	/// </summary>
	abstract class PlatformProjectGenerator
	{
		public static readonly string DefaultPlatformConfigurationType = "Makefile";
		protected readonly ILogger Logger;

		/// <summary>
		/// Constructor
		/// </summary>
		/// <param name="Arguments">Command line arguments passed to the project generator</param>
		/// <param name="Logger">Logger for output</param>
		public PlatformProjectGenerator(CommandLineArguments Arguments, ILogger Logger)
		{
			this.Logger = Logger;
		}

		/// <summary>
		/// Register the platform with the UEPlatformProjectGenerator class
		/// </summary>
		public abstract IEnumerable<UnrealTargetPlatform> GetPlatforms();

		public virtual void GenerateGameProjectStub(ProjectFileGenerator InGenerator, string InTargetName, string InTargetFilepath, TargetRules InTargetRules,
			List<UnrealTargetPlatform> InPlatforms, List<UnrealTargetConfiguration> InConfigurations)
		{
			// Do nothing
		}

		public virtual void GenerateGameProperties(UnrealTargetConfiguration Configuration, StringBuilder VCProjectFileContent, TargetType TargetType, DirectoryReference RootDirectory, FileReference TargetFilePath)
		{
			// Do nothing
		}

		public virtual bool RequiresVSUserFileGeneration()
		{
			return false;
		}

		///
		///	VisualStudio project generation functions
		///	
		/// <summary>
		/// Whether this build platform has native support for VisualStudio
		/// </summary>
		/// <param name="InPlatform">  The UnrealTargetPlatform being built</param>
		/// <param name="InConfiguration"> The UnrealTargetConfiguration being built</param>
		/// <param name="ProjectFileFormat">The visual studio project file format being generated</param>
		/// <returns>bool    true if native VisualStudio support (or custom VSI) is available</returns>
		public virtual bool HasVisualStudioSupport(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration, VCProjectFileFormat ProjectFileFormat)
		{
			// By default, we assume this is true
			return true;
		}

		/// <summary>
		/// Return the VisualStudio platform name for this build platform
		/// </summary>
		/// <param name="InPlatform">  The UnrealTargetPlatform being built</param>
		/// <param name="InConfiguration"> The UnrealTargetConfiguration being built</param>
		/// <returns>string    The name of the platform that VisualStudio recognizes</returns>
		public virtual string GetVisualStudioPlatformName(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration)
		{
			// By default, return the platform string
			return InPlatform.ToString();
		}

		/// <summary>
		/// Return the VisualStudio platform name for this build platform
		/// </summary>
		/// <param name="InPlatform">  The UnrealTargetPlatform being built</param>
		/// <param name="InConfiguration"> The UnrealTargetConfiguration being built</param>
		/// <param name="InProjectDir">  The root directory for the current project</param>
		/// <returns>string    The name of the platform that VisualStudio recognizes</returns>
		public virtual string GetVisualStudioPlatformName(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration, DirectoryReference InProjectDir)
		{
			// By default, return the project-independent platform string
			return GetVisualStudioPlatformName(InPlatform, InConfiguration);
		}

		/// <summary>
		/// Return whether we need a distinct platform name - for cases where there are two targets of the same VS solution platform
		/// </summary>
		/// <param name="InPlatform">  The UnrealTargetPlatform being built</param>
		/// <param name="InConfiguration"> The UnrealTargetConfiguration being built</param>
		/// <param name="InProjectDir">  The root directory for the current project</param>
		/// <returns>bool</returns>
		public virtual bool RequiresDistinctVisualStudioConfigurationName(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration, DirectoryReference InProjectDir)
		{
			return false;
		}

		/// <summary>
		/// Return project configuration settings that must be included before the default props file for all configurations
		/// </summary>
		/// <param name="InPlatform">The UnrealTargetPlatform being built</param>
		/// <param name="ProjectFileBuilder">String builder for the project file</param>
		/// <returns>string    The custom configuration section for the project file; Empty string if it doesn't require one</returns>
		public virtual void GetVisualStudioPreDefaultString(UnrealTargetPlatform InPlatform, StringBuilder ProjectFileBuilder)
		{
		}

		/// <summary>
		/// Return project configuration settings that must be included before the default props file
		/// </summary>
		/// <param name="InPlatform">The UnrealTargetPlatform being built</param>
		/// <param name="InConfiguration">The UnrealTargetConfiguration being built</param>
		/// <param name="ProjectFileBuilder">String builder for the project file</param>
		/// <returns>string    The custom configuration section for the project file; Empty string if it doesn't require one</returns>
		public virtual void GetVisualStudioPreDefaultString(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration, StringBuilder ProjectFileBuilder)
		{
		}

		/// <summary>
		/// Return the platform toolset string to write into the project configuration
		/// </summary>
		/// <param name="InPlatform">  The UnrealTargetPlatform being built</param>
		/// <param name="InConfiguration"> The UnrealTargetConfiguration being built</param>
		/// <param name="InProjectFileFormat">The visual studio project file format being generated</param>
		/// <param name="ProjectFileBuilder">String builder for the project file</param>
		/// <returns>string    The custom configuration section for the project file; Empty string if it doesn't require one</returns>
		public virtual void GetVisualStudioPlatformToolsetString(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration, VCProjectFileFormat InProjectFileFormat, StringBuilder ProjectFileBuilder)
		{
		}

		/// <summary>
		/// Return any custom property group lines
		/// </summary>
		/// <param name="InPlatform">  The UnrealTargetPlatform being built</param>
		/// <param name="InProjectFileFormat">The visual studio project file format being generated</param>
		/// <param name="ProjectFileBuilder">String builder for the project file</param>
		/// <returns>string    The custom property import lines for the project file; Empty string if it doesn't require one</returns>
		public virtual void GetAdditionalVisualStudioPropertyGroups(UnrealTargetPlatform InPlatform, VCProjectFileFormat InProjectFileFormat, StringBuilder ProjectFileBuilder)
		{
		}

		/// <summary>
		/// Return any custom property group lines
		/// </summary>
		/// <param name="InPlatform">  The UnrealTargetPlatform being built</param>
		/// <param name="InProjectFileFormat">The visual studio project file format being generated</param>
		/// <returns>string    The platform configuration type.  Defaults to "Makefile" unless overridden</returns>
		public virtual string GetVisualStudioPlatformConfigurationType(UnrealTargetPlatform InPlatform, VCProjectFileFormat InProjectFileFormat)
		{
			return DefaultPlatformConfigurationType;
		}

		/// <summary>
		/// Return any custom paths for VisualStudio this platform requires
		/// This include ReferencePath, LibraryPath, LibraryWPath, IncludePath and ExecutablePath.
		/// </summary>
		/// <param name="InPlatform">The UnrealTargetPlatform being built</param>
		/// <param name="InConfiguration">The configuration being built</param>
		/// <param name="TargetType">The type of target (game or program)</param>
		/// <param name="TargetRulesPath">Path to the .target.cs file</param>
		/// <param name="ProjectFilePath"></param>
		/// <param name="NMakeOutputPath"></param>
		/// <param name="InProjectFileFormat">The visual studio project file format being generated</param>
		/// <param name="ProjectFileBuilder">String builder for the project file</param>
		/// <returns>The custom path lines for the project file; Empty string if it doesn't require one</returns>
		public virtual void GetVisualStudioPathsEntries(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration, TargetType TargetType, FileReference TargetRulesPath, FileReference ProjectFilePath, FileReference NMakeOutputPath, VCProjectFileFormat InProjectFileFormat, StringBuilder ProjectFileBuilder)
		{
		}

		/// <summary>
		/// Return any custom property settings. These will be included in the ImportGroup section
		/// </summary>
		/// <param name="InPlatform">  The UnrealTargetPlatform being built</param>
		/// <param name="ProjectFileBuilder">String builder for the project file</param>
		/// <returns>string    The custom property import lines for the project file; Empty string if it doesn't require one</returns>
		public virtual void GetVisualStudioImportGroupProperties(UnrealTargetPlatform InPlatform, StringBuilder ProjectFileBuilder)
		{
		}

		/// <summary>
		/// Return any custom property settings. These will be included right after Global properties to make values available to all other imports.
		/// </summary>
		/// <param name="InPlatform">  The UnrealTargetPlatform being built</param>
		/// <param name="ProjectFileBuilder">String builder for the project file</param>
		/// <returns>string    The custom property import lines for the project file; Empty string if it doesn't require one</returns>
		public virtual void GetVisualStudioGlobalProperties(UnrealTargetPlatform InPlatform, StringBuilder ProjectFileBuilder)
		{
		}

		/// <summary>
		/// Return any custom target overrides. These will be included last in the project file so they have the opportunity to override any existing settings.
		/// </summary>
		/// <param name="InPlatform">  The UnrealTargetPlatform being built</param>
		/// <param name="InProjectFileFormat">The visual studio project file format being generated</param>
		/// <param name="ProjectFileBuilder">String builder for the project file</param>
		/// <returns>string    The custom property import lines for the project file; Empty string if it doesn't require one</returns>
		public virtual void GetVisualStudioTargetOverrides(UnrealTargetPlatform InPlatform, VCProjectFileFormat InProjectFileFormat, StringBuilder ProjectFileBuilder)
		{
		}

		/// <summary>
		/// Return any custom layout directory sections
		/// </summary>
		/// <param name="InPlatform">The UnrealTargetPlatform being built</param>
		/// <param name="InConfiguration">The configuration being built</param>
		/// <param name="InConditionString"></param>
		/// <param name="TargetType">The type of target (game or program)</param>
		/// <param name="InProjectFileFormat">The visual studio project file format being generated</param>
		/// <param name="NMakeOutputPath"></param>
		/// <param name="ProjectFilePath"></param>
		/// <param name="TargetRulesPath"></param>
		/// <returns>string    The custom property import lines for the project file; Empty string if it doesn't require one</returns>
		public virtual string GetVisualStudioLayoutDirSection(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration, string InConditionString, TargetType TargetType, FileReference TargetRulesPath, FileReference ProjectFilePath, FileReference NMakeOutputPath, VCProjectFileFormat InProjectFileFormat)
		{
			return "";
		}

		/// <summary>
		/// Get the output manifest section, if required
		/// </summary>
		/// <param name="InPlatform">The UnrealTargetPlatform being built</param>
		/// <param name="TargetType">The type of the target being built</param>
		/// <param name="TargetRulesPath">Path to the .target.cs file</param>
		/// <param name="ProjectFilePath">Path to the project file</param>
		/// <param name="InProjectFileFormat">The visual studio project file format being generated</param>
		/// <returns>The output manifest section for the project file; Empty string if it doesn't require one</returns>
		public virtual string GetVisualStudioOutputManifestSection(UnrealTargetPlatform InPlatform, TargetType TargetType, FileReference TargetRulesPath, FileReference ProjectFilePath, VCProjectFileFormat InProjectFileFormat)
		{
			return "";
		}

		/// <summary>
		/// Get whether this platform deploys
		/// </summary>
		/// <returns>bool  true if the 'Deploy' option should be enabled</returns>
		public virtual bool GetVisualStudioDeploymentEnabled(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration)
		{
			return false;
		}

		/// <summary>
		/// Get the text to insert into the user file for the given platform/configuration/target
		/// </summary>
		/// <param name="InPlatform">The platform being added</param>
		/// <param name="InConfiguration">The configuration being added</param>
		/// <param name="InConditionString">The condition string </param>
		/// <param name="InTargetRules">The target rules </param>
		/// <param name="TargetRulesPath">The target rules path</param>
		/// <param name="ProjectFilePath">The project file path</param>
		/// <returns>The string to append to the user file</returns>
		public virtual string GetVisualStudioUserFileStrings(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration,
			string InConditionString, TargetRules InTargetRules, FileReference TargetRulesPath, FileReference ProjectFilePath)
		{
			return "";
		}

		/// <summary>
		/// Get the text to insert into the user file for the given platform/configuration/target
		/// </summary>
		/// <param name="InPlatform">The platform being added</param>
		/// <param name="InConfiguration">The configuration being added</param>
		/// <param name="InConditionString">The condition string </param>
		/// <param name="InTargetRules">The target rules </param>
		/// <param name="TargetRulesPath">The target rules path</param>
		/// <param name="ProjectFilePath">The project file path</param>
		/// <param name="ProjectName">The name of the project</param>
		/// <param name="ForeignUProjectPath">Path to foreign .uproject file, if any</param>
		/// <returns>The string to append to the user file</returns>
		public virtual string GetVisualStudioUserFileStrings(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration,
			string InConditionString, TargetRules InTargetRules, FileReference TargetRulesPath, FileReference ProjectFilePath, string ProjectName, string? ForeignUProjectPath)
		{
			return GetVisualStudioUserFileStrings(InPlatform, InConfiguration, InConditionString, InTargetRules, TargetRulesPath, ProjectFilePath);
		}

		/// <summary>
		/// For Additional Project Property files that need to be written out.  This is currently used only on Android. 
		/// </summary>
		public virtual void WriteAdditionalPropFile()
		{
		}

		/// <summary>
		/// For additional Project files (ex. *PROJECTNAME*-AndroidRun.androidproj.user) that needs to be written out.  This is currently used only on Android. 
		/// </summary>
		/// <param name="ProjectFile">Project file this will be related to</param>
		public virtual void WriteAdditionalProjUserFile(ProjectFile ProjectFile)
		{
		}

		/// <summary>
		/// For additional Project files (ex. *PROJECTNAME*-AndroidRun.androidproj) that needs to be written out.  This is currently used only on Android. 
		/// </summary>
		/// <param name="ProjectFile">Project file this will be related to</param>
		/// <returns>Project file written out, Solution folder it should be put in</returns>
		public virtual Tuple<ProjectFile, string>? WriteAdditionalProjFile(ProjectFile ProjectFile)
		{
			return null;
		}

		/// <summary>
		/// Gets the text to insert into the UnrealVS configuration file
		/// </summary>
		public virtual void GetUnrealVSConfigurationEntries(StringBuilder UnrealVSContent)
		{
		}

		/// <summary>
		/// Gets the text to insert into the Project files as additional build arugments for given platform/configuration
		/// </summary>
		/// <param name="InPlatform">The platform being added</param>
		/// <param name="InConfiguration">The configuration being added</param>
		public virtual string GetExtraBuildArguments(UnrealTargetPlatform InPlatform, UnrealTargetConfiguration InConfiguration)
		{
			return "";
		}

		/// <summary>
		/// Indicates whether this generator will be emitting additional build targets.
		/// Functionally, it's fine to return true and not return any additional text in GetVisualStudioTargetsString, but doing
		/// so may incur additional cost of preparing data for generation.
		/// </summary>
		/// <param name="InPlatform">The platform being added</param>
		/// <returns>True if Targets will be generate, false otherwise. If true is returned, GetVisualStudioTargetsString will be called next.</returns>
		/// <seealso cref="GetVisualStudioTargetsString"/>
		public virtual bool HasVisualStudioTargets(UnrealTargetPlatform InPlatform)
		{
			return false;
		}

		/// <summary>
		/// Get the text to insert into the Project files as additional build targets for the given platform.
		/// </summary>
		/// <param name="InPlatform">The platform being added</param>
		/// <param name="InPlatformConfigurations">List of build configurations for the platform</param>
		/// <param name="ProjectFileBuilder">String builder for the project file</param>
		public virtual void GetVisualStudioTargetsString(UnrealTargetPlatform InPlatform, List<ProjectBuildConfiguration> InPlatformConfigurations, StringBuilder ProjectFileBuilder)
		{
		}
	}
}