Import('env')
Import('env_modules')

# TODO Support is turned off for now because Godot 3 doesn't compile with C++17.
# FastNoise2 use C++17 features and STL both in its headers and runtime as well.
# SIMD noise support would have to wait for Godot 4...
FAST_NOISE_2_SRC = False
FAST_NOISE_2_STATIC = False

RUN_TESTS = False
if env['target'] == 'debug':
	RUN_TESTS = True

env_voxel = env_modules.Clone()

voxel_files = [
	"*.cpp",
	
	"constants/*.cpp",

	"meshers/blocky/*.cpp",
	"meshers/transvoxel/*.cpp",
	"meshers/dmc/*.cpp",
	"meshers/cubes/*.cpp",
	"meshers/*.cpp",

	"streams/*.cpp",
	"streams/sqlite/*.cpp",
	"streams/region/*.cpp",

	"storage/*.cpp",

	"generators/*.cpp",
	"generators/graph/*.cpp",
	"generators/simple/*.cpp",

	"util/*.cpp",
	"util/godot/*.cpp",
	#"util/noise/*.cpp",
	"util/noise/fast_noise_lite.cpp",
	"util/noise/fast_noise_lite_gradient.cpp",

	"terrain/*.cpp",
	"terrain/instancing/*.cpp",

	"server/*.cpp",
	"edition/*.cpp",

	"thirdparty/lz4/*.c",
	"thirdparty/sqlite/*.c"
]

if env["tools"]:
	# Editor-only stuff
	voxel_editor_files = [
		"editor/*.cpp",
		"editor/graph/*.cpp",
		"editor/terrain/*.cpp",
		"editor/fast_noise_lite/*.cpp",
		"editor/instance_library/*.cpp",
	]
	voxel_files += voxel_editor_files

if RUN_TESTS:
	voxel_files += [
		"tests/tests.cpp"
	]
	env_voxel.Append(CPPDEFINES={"VOXEL_RUN_TESTS": 0})

if env["platform"] == "windows":
	# When compiling SQLite with Godot on Windows with MSVC, it produces the following warning:
	# `sqlite3.c(42754): warning C4996: 'GetVersionExA': was declared deprecated `
	# To fix it, let's indicate to SQLite it should not use this function, even if it is available.
	# https://stackoverflow.com/questions/20031597/error-c4996-received-when-compiling-sqlite-c-in-visual-studio-2013
	env_voxel.Append(CPPDEFINES={"SQLITE_WIN32_GETVERSIONEX": 0})

# ----------------------------------------------------------------------------------------------------------------------
# FastNoise 2

if FAST_NOISE_2_SRC:
	# Build from source. Should be the simplest, but requires C++17
	SConscript('thirdparty/fast_noise_2/SConscript', exports = ["env", "env_voxel"])

if FAST_NOISE_2_STATIC:
	# Build from a pre-built static lib. This requires to check every build combination (and have them as well),
	# AND it also requires C++17 due to differences of runtimes.
	fn2_path = "C:/Projects/FastNoise2/0.7-alpha"

	if env["platform"] == "windows":
		if env.msvc:
			if env['bits'] == '64':
				env_voxel.Append(LIBPATH = [fn2_path + "/lib/win64-msvc"])
			else:
				raise RuntimeError("FastNoise2 32-bit builds are not supported yet")
		else:
			raise RuntimeError("FastNoise2 can only be built with MSVC at the moment")

		env_voxel.Append(CPPPATH = [fn2_path + '/include'])
		if env['target'] == 'debug':
			env_voxel.Append(LIBS = ['FastNoise'])
		else:
			env_voxel.Append(LIBS = ['FastNoiseD'])
	else:
		raise RuntimeError("FastNoise2 can only be built on Windows at the moment")

	voxel_files += [
		"util/noise/fast_noise_2.cpp"
	]

	env_voxel.Append(CPPDEFINES = ["VOXEL_FAST_NOISE_2_SUPPORT"])

# ----------------------------------------------------------------------------------------------------------------------

for f in voxel_files:
	env_voxel.add_source_files(env.modules_sources, f)

# TODO Check webassembly builds (`env["platform"] == "javascript"`)

# Ignored clang warnings because Godot's codebase is old and isn't using override yet
if env['platform'] in ['osx', 'android']:
	env_voxel.Append(CXXFLAGS=['-Wno-inconsistent-missing-override'])

# Doesn't work, because reasons
#if env.msvc:
#	env_voxel.Append(CXXFLAGS=['/std:c++17'])
#else:
#	env_voxel.Append(CXXFLAGS=['-std=c++17'])

# This also doesn't work, since the rest of Godot doesn't use this, linking fails.
# No safe STL boundary checks for you.
#if env['target'] == 'debug':
#	if env.msvc:
#		# Enable STL bound checks, Godot's master environment doesn't do it
#		env_voxel.Append(CXXFLAGS=['/D_DEBUG'])