cmake_minimum_required(VERSION 3.5.1)


#############
# Constants #
#############

set(ASSETS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/assets")


###########
# Options #
###########

option(JAPANESE "Enable the Japanese-language build (instead of the unofficial Aeon Genesis English translation)" OFF)
option(FIX_BUGS "Fix various bugs in the game" OFF)
option(FIX_MAJOR_BUGS "Fix bugs that invoke undefined behaviour or cause memory leaks" OFF)
option(DEBUG_SAVE "Re-enable the dummied-out 'Debug Save' option, and the ability to drag-and-drop save files onto the window" OFF)

option(LTO "Enable link-time optimisation" OFF)
option(MSVC_LINK_STATIC_RUNTIME "Link the static MSVC runtime library" OFF)


#########
# Setup #
#########

project(CSE2 LANGUAGES C CXX)

add_executable(CSE2 WIN32
	"${ASSETS_DIRECTORY}/resources/CSE2.rc"
	"src/ArmsItem.cpp"
	"src/ArmsItem.h"
	"src/Back.cpp"
	"src/Back.h"
	"src/Boss.cpp"
	"src/Boss.h"
	"src/BossAlmo1.cpp"
	"src/BossAlmo1.h"
	"src/BossAlmo2.cpp"
	"src/BossAlmo2.h"
	"src/BossBallos.cpp"
	"src/BossBallos.h"
	"src/BossFrog.cpp"
	"src/BossFrog.h"
	"src/BossIronH.cpp"
	"src/BossIronH.h"
	"src/BossLife.cpp"
	"src/BossLife.h"
	"src/BossOhm.cpp"
	"src/BossOhm.h"
	"src/BossPress.cpp"
	"src/BossPress.h"
	"src/BossTwinD.cpp"
	"src/BossTwinD.h"
	"src/BossX.cpp"
	"src/BossX.h"
	"src/BulHit.cpp"
	"src/BulHit.h"
	"src/Bullet.cpp"
	"src/Bullet.h"
	"src/Caret.cpp"
	"src/Caret.h"
	"src/CommonDefines.h"
	"src/Config.cpp"
	"src/Config.h"
	"src/Dialog.cpp"
	"src/Dialog.h"
	"src/Draw.cpp"
	"src/Draw.h"
	"src/Ending.cpp"
	"src/Ending.h"
	"src/Escape.cpp"
	"src/Escape.h"
	"src/Fade.cpp"
	"src/Fade.h"
	"src/Flags.cpp"
	"src/Flags.h"
	"src/Flash.cpp"
	"src/Flash.h"
	"src/Frame.cpp"
	"src/Frame.h"
	"src/Game.cpp"
	"src/Game.h"
	"src/Generic.cpp"
	"src/Generic.h"
	"src/GenericLoad.cpp"
	"src/GenericLoad.h"
	"src/Input.cpp"
	"src/Input.h"
	"src/KeyControl.cpp"
	"src/KeyControl.h"
	"src/Main.cpp"
	"src/Main.h"
	"src/Map.cpp"
	"src/Map.h"
	"src/MapName.cpp"
	"src/MapName.h"
	"src/MiniMap.cpp"
	"src/MiniMap.h"
	"src/MyChar.cpp"
	"src/MyChar.h"
	"src/MycHit.cpp"
	"src/MycHit.h"
	"src/MycParam.cpp"
	"src/MycParam.h"
	"src/NpcAct.h"
	"src/NpcAct000.cpp"
	"src/NpcAct020.cpp"
	"src/NpcAct040.cpp"
	"src/NpcAct060.cpp"
	"src/NpcAct080.cpp"
	"src/NpcAct100.cpp"
	"src/NpcAct120.cpp"
	"src/NpcAct140.cpp"
	"src/NpcAct160.cpp"
	"src/NpcAct180.cpp"
	"src/NpcAct200.cpp"
	"src/NpcAct220.cpp"
	"src/NpcAct240.cpp"
	"src/NpcAct260.cpp"
	"src/NpcAct280.cpp"
	"src/NpcAct300.cpp"
	"src/NpcAct320.cpp"
	"src/NpcAct340.cpp"
	"src/NpChar.cpp"
	"src/NpChar.h"
	"src/NpcHit.cpp"
	"src/NpcHit.h"
	"src/NpcTbl.cpp"
	"src/NpcTbl.h"
	"src/Organya.cpp"
	"src/Organya.h"
	"src/PixTone.cpp"
	"src/PixTone.h"
	"src/Profile.cpp"
	"src/Profile.h"
	"src/SelStage.cpp"
	"src/SelStage.h"
	"src/Shoot.cpp"
	"src/Shoot.h"
	"src/Sound.cpp"
	"src/Sound.h"
	"src/Stage.cpp"
	"src/Stage.h"
	"src/Star.cpp"
	"src/Star.h"
	"src/TextScr.cpp"
	"src/TextScr.h"
	"src/Triangle.cpp"
	"src/Triangle.h"
	"src/ValueView.cpp"
	"src/ValueView.h"
	"src/WindowsWrapper.h"
)


###################
# Option handling #
###################

if(JAPANESE)
	set(BUILD_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/game_japanese")
	target_compile_definitions(CSE2 PRIVATE JAPANESE)
else()
	set(BUILD_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/game_english")
endif()

if(FIX_BUGS)
	target_compile_definitions(CSE2 PRIVATE FIX_BUGS)
endif()

if(FIX_BUGS OR FIX_MAJOR_BUGS)
	target_compile_definitions(CSE2 PRIVATE FIX_MAJOR_BUGS)
endif()

if(DEBUG_SAVE)
	target_compile_definitions(CSE2 PRIVATE DEBUG_SAVE)
endif()

if(LTO)
	include(CheckIPOSupported)

	check_ipo_supported(RESULT result)

	if(result)
		set_target_properties(CSE2 PROPERTIES INTERPROCEDURAL_OPTIMIZATION TRUE)
	endif()
endif()

# This is messy as hell, and has been replaced by CMAKE_MSVC_RUNTIME_LIBRARY,
# but that's a very recent CMake addition, so we're still doing it this way for now
if(MSVC AND MSVC_LINK_STATIC_RUNTIME)
	# Statically-link the CRT (vcpkg static libs do this)
	foreach(flag_var CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
		if(${flag_var} MATCHES "/MD")
			string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
		endif()
	endforeach()
endif()


##########
# Tweaks #
##########

# Make some tweaks if we're using MSVC
if(MSVC)
	# Disable warnings that normally fire up on MSVC when using "unsafe" functions instead of using MSVC's "safe" _s functions
	target_compile_definitions(CSE2 PRIVATE _CRT_SECURE_NO_WARNINGS)

	# Make it so source files are recognized as UTF-8 by MSVC
	target_compile_options(CSE2 PRIVATE "/utf-8")
endif()


##################
# Misc. settings #
##################

# Force strict C90
set_target_properties(CSE2 PROPERTIES
	C_STANDARD 90
	C_STANDARD_REQUIRED ON
	C_EXTENSIONS OFF
)

# Force strict C++98
set_target_properties(CSE2 PROPERTIES
	CXX_STANDARD 98
	CXX_STANDARD_REQUIRED ON
	CXX_EXTENSIONS OFF
)

# Name debug builds "CSE2_debug", to distinguish them
set_target_properties(CSE2 PROPERTIES DEBUG_OUTPUT_NAME "CSE2_debug")

# Send executable to the build_en/build_jp directory
set_target_properties(CSE2 PROPERTIES
	RUNTIME_OUTPUT_DIRECTORY ${BUILD_DIRECTORY}
	RUNTIME_OUTPUT_DIRECTORY_RELEASE ${BUILD_DIRECTORY}
	RUNTIME_OUTPUT_DIRECTORY_MINSIZEREL ${BUILD_DIRECTORY}
	RUNTIME_OUTPUT_DIRECTORY_RELWITHDEBINFO ${BUILD_DIRECTORY}
	RUNTIME_OUTPUT_DIRECTORY_DEBUG ${BUILD_DIRECTORY}
)


################
# Dependencies #
################

# Link libraries
target_link_libraries(CSE2 PRIVATE ddraw dsound version shlwapi imm32 winmm dxguid gdi32)

# Newer MSVC is missing `dinput.lib`
if(MSVC AND NOT (MSVC_VERSION LESS 1500))
	target_link_libraries(CSE2 PRIVATE dinput8)
else()
	target_link_libraries(CSE2 PRIVATE dinput)
endif()