-- Phanes build configuration
VERSION = "1.0.0"

-- Override with specific platform if necessary
PLATFORM = os.target()

-- architecture.
ARCH = "x86_64"

-- SSE options:
-- SSE4: SSE
-- AVX: AVX
-- AVX2: AVX2
-- No SSE: FPU
-- None: Automatically detect SSE during build
SSE = "None"

phanesRoot = path.getabsolute(".")
phanesBin = path.join(phanesRoot, "bin")
phanesInt = path.join(phanesRoot, ".int")
phanesBuildFiles = path.join(phanesRoot, "build")

PhanesEngine = path.join(phanesRoot, "Engine")
PhanesRuntime = path.join(PhanesEngine, "Source/Runtime")
PhanesThirdParty = path.join(PhanesEngine, "Source/ThirdParty")

workspace("PhanesEngine")
cppdialect("C++20")
architecture(ARCH)
toolset("gcc")
flags({ "MultiProcessorCompile" })
clangtidy("On")
debugger("gdb")
startproject("MathTestFPU")
configurations({ "Debug", "Release" })

function linux_sse()
	if SSE == "SSE" then
		defines({ "P_SSE__" })
		buildoptions({ "-msse4", "-msse2", "-msse3" })
	elseif SSE == "AVX" then
		defines({ "P_AVX__" })
		buildoptions({ "-mavx", "-msse4", "-msse2", "-msse3" })
	elseif SSE == "AVX2" then
		defines({ "P_AVX2__" })
		buildoptions({ "-mavx2", "-mavx", "-msse4", "-msse2", "-msse3" })
	elseif SSE == "FPU" then
		defines({ "P_FORCE_FPU" })
	end
end

function boilerplate()
	language("C++")

	location(phanesBuildFiles .. "/%{prj.name}")
	targetdir(phanesBin .. "/" .. VERSION .. "/%{cfg.buildcfg}/%{prj.name}")
	objdir(phanesInt .. "/" .. VERSION .. "/%{cfg.buildcfg}/%{prj.name}")

	if PLATFORM == "linux" then
		defines({ "P_LINUX_BUILD" })
		buildoptions({ "-Wall", "-Wextra", "-Werror" })
		linux_sse()
		buildoptions({ "-Wno-unused-parameter", "-fms-extensions" })
	end

	filter("configurations:Debug")
	defines({ "DEBUG", "TRACE", "P_DEBUG" })
	symbols("On")
	buildmessage("Building %{prj.name} in debug mode")

	filter("configurations:Release")
	defines({ "NDEBUG", "P_RELEASE" })
	linktimeoptimization("On")
	optimize("On")
	intrinsics("On")
	buildmessage("Building %{prj.name} in release mode")

	filter({})
end

function third_party_boilerplate()
	language("C++")

	location(phanesBuildFiles .. "/%{prj.name}")
	targetdir(phanesBin .. "/" .. VERSION .. "/%{cfg.buildcfg}/%{prj.name}")
	objdir(phanesInt .. "/" .. VERSION .. "/%{cfg.buildcfg}/%{prj.name}")

	if PLATFORM == "linux" then
		buildoptions({ "-Wall", "-Wextra", "-Werror" })
		linux_sse()
	end

	filter("configurations:Debug")
	defines({ "DEBUG", "TRACE", "P_DEBUG" })
	symbols("On")
	buildmessage("Building %{prj.name} in debug mode")

	filter("configurations:Release")
	defines({ "NDEBUG", "P_RELEASE" })
	linktimeoptimization("On")
	optimize("On")
	intrinsics("On")
	buildmessage("Building %{prj.name} in release mode")

	filter({})
end

-- actions

function action_clean()
	os.rmdir(phanesBin)
	os.rmdir(phanesInt)
	os.rmdir(phanesBuildFiles)
	os.remove(phanesRoot .. "/Makefile")
end

newaction({
	trigger = "clean",
	description = "Clean the build",
	execute = action_clean,
})

-- includeProjects here
include(phanesRoot .. "/Engine/Source/Runtime/Core/premake5.lua")
include(phanesRoot .. "/DevPlayground/premake5.lua")
include(PhanesRuntime .. "/Core/Tests/Math/MathTestFPU/premake5.lua")