// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using AutomationTool;
using UnrealBuildTool;

/// <summary>
/// Common UEBuild utilities
/// </summary>
public class UE4BuildUtils : CommandUtils
{
	/// <summary>
	/// Builds BuildPatchTool for the specified platform.
	/// </summary>
	/// <param name="Command"></param>
	/// <param name="InPlatform"></param>
	public static void BuildBuildPatchTool(BuildCommand Command, UnrealBuildTool.UnrealTargetPlatform InPlatform)
	{
		BuildProduct(Command, new UE4Build.BuildTarget()
			{
				UprojectPath = null,
				TargetName = "BuildPatchTool",
				Platform = InPlatform,
				Config = UnrealBuildTool.UnrealTargetConfiguration.Shipping,
			});
	}

	/// <summary>
	/// Builds UnrealHeaderTool for the specified platform.
	/// </summary>
	/// <param name="Command"></param>
	/// <param name="InPlatform"></param>
	public static void BuildUnrealHeaderTool(BuildCommand Command, UnrealBuildTool.UnrealTargetPlatform InPlatform)
	{
		BuildProduct(Command, new UE4Build.BuildTarget()
		{
			UprojectPath = null,
			TargetName = "UnrealHeaderTool",
			Platform = InPlatform,
			Config = UnrealBuildTool.UnrealTargetConfiguration.Development,
		});
	}

	private static void BuildProduct(BuildCommand Command, UE4Build.BuildTarget Target)
	{
		if (Target == null)
		{
			throw new AutomationException("Target is required when calling UE4BuildUtils.BuildProduct");
		}

		LogInformation("Building {0}", Target.TargetName);

		if (Command == null)
		{
			Command = new UE4BuildUtilDummyBuildCommand();
		}

		var UE4Build = new UE4Build(Command);

		var Agenda = new UE4Build.BuildAgenda();
		Agenda.Targets.Add(Target);

		UE4Build.Build(Agenda, InDeleteBuildProducts: true, InUpdateVersionFiles: true);
		UE4Build.CheckBuildProducts(UE4Build.BuildProductFiles);
	}

	class UE4BuildUtilDummyBuildCommand : BuildCommand
	{
		public override void ExecuteBuild()
		{
			// noop
		}
	}
}