cmake_minimum_required(VERSION 3.4)
project(pioneer LANGUAGES CXX)

set(CMAKE_INCLUDE_CURRENT_DIR ON)

# If both libGL.so and libOpenGL.so are found, default to the latter
# (former is a legacy name).
# Set OpenGL_GL_PREFERENCE=LEGACY to force it to use the former.
if(POLICY CMP0072)
	cmake_policy(SET CMP0072 NEW)
endif()

set(IS_TRAVIS $ENV{TRAVIS})

if (IS_TRAVIS)
    set(CMAKE_COLOR_MAKEFILE false)
endif()

include(GNUInstallDirs)

if (MINGW)
	# Fix build errors on AppVeyor with MinGW due to a broken GLEW config script
	list(INSERT CMAKE_MODULE_PATH 0 ${CMAKE_SOURCE_DIR}/cmake/Modules)
endif (MINGW)

# We don't want a 'bin' folder on Windows
if (WIN32)
	set(CMAKE_INSTALL_BINDIR ${CMAKE_INSTALL_PREFIX})
endif (WIN32)

if (MSVC)
	# Avoid annoying warnings from Visual Studio
	add_definitions(-D_CRT_SECURE_NO_WARNINGS)

	# Use M_PI/M_E macros from math.h
	add_definitions(-D_USE_MATH_DEFINES -DHAVE_M_PI)

	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP")
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
endif (MSVC)

if (APPLE)
	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-gnu")
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-gnu")
endif(APPLE)

if (CMAKE_COMPILER_IS_GNUCXX)
    if (NOT IS_TRAVIS)
        add_compile_options(-fdiagnostics-color)
    endif()
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fpermissive")
endif (CMAKE_COMPILER_IS_GNUCXX)

include(CheckSymbolExists)
check_symbol_exists(feclearexcept "fenv.h" HAS_FECLEAREXCEPT)
check_symbol_exists(feenableexcept "fenv.h" HAS_FEENABLEEXCEPT)
check_symbol_exists(fedisableexcept "fenv.h" HAS_FEDISABLEEXCEPT)
if (HAS_FECLEAREXCEPT AND HAS_FEENABLEEXCEPT AND HAS_FEDISABLEEXCEPT)
	set(HAS_FPE_OPS ON)
endif()

if (NOT CMAKE_BUILD_TYPE)
	set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING
		"Choose the type of build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel."
		FORCE)
	set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS None Debug Release RelWithDebInfo MinSizeRel)
endif()

# Get the GIT hash of the latest commit
include(FindGit OPTIONAL)
if (GIT_FOUND AND EXISTS ${PROJECT_SOURCE_DIR}/.git)
	execute_process(
		COMMAND ${GIT_EXECUTABLE} rev-parse --short HEAD
		WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
		OUTPUT_VARIABLE PROJECT_VERSION_GIT
		OUTPUT_STRIP_TRAILING_WHITESPACE
	)
endif()

string(TIMESTAMP PROJECT_VERSION "%Y%m%d")

if (NOT PIONEER_DATA_DIR)
	set(PIONEER_DATA_DIR ${CMAKE_INSTALL_FULL_DATADIR}/pioneer/data CACHE PATH
		"Path where game data will be installed" FORCE)
endif (NOT PIONEER_DATA_DIR)

file(TO_NATIVE_PATH ${PIONEER_DATA_DIR} _PIONEER_DATA_DIR)

if (MINGW)
	# Enable PRIxYY macros on MinGW
	add_definitions(-D__STDC_FORMAT_MACROS)
endif (MINGW)

option(WITH_OBJECTVIEWER "Include the object viewer in the build" ON)
option(WITH_DEVKEYS "Include various extra keybindings for dev functions" ON)
option(USE_SYSTEM_LIBGLEW "Use the system's libglew" OFF)
option(USE_SYSTEM_LIBLUA "Use the system's liblua" OFF)
option(PROFILER_ENABLED "Build pioneer with profiling support built-in." OFF)
option(REMOTE_LUA_REPL "Enable remote LUA console" OFF)

if (REMOTE_LUA_REPL)
	set(REMOTE_LUA_REPL_PORT 12345 CACHE STRING "TCP port for remote LUA console")
endif (REMOTE_LUA_REPL)

list(APPEND SRC_FOLDERS
	src/
	src/collider
	src/galaxy
	src/gameui
	src/graphics
	src/graphics/dummy
	src/graphics/opengl
	src/gui
	src/pigui
	src/scenegraph
	src/ship
	src/sound
	src/terrain
	src/text
	src/ui
)

macro(add_source_folders TARGET SRC_FOLDERS)
foreach (each IN LISTS ${SRC_FOLDERS})
	file(GLOB header_files RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${each}/*.h)
	list(APPEND ${TARGET}_HXX_FILES ${header_files})
	file(GLOB src_files RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${each}/*.cpp)
	list(APPEND ${TARGET}_CXX_FILES ${src_files})
endforeach ()
endmacro()

add_source_folders(PIONEER SRC_FOLDERS)

list(REMOVE_ITEM PIONEER_CXX_FILES
	src/main.cpp
	src/modelcompiler.cpp
	src/savegamedump.cpp
	src/tests.cpp
	src/textstress.cpp
	src/uitest.cpp
)

list(APPEND FILESYSTEM_CXX_FILES)

if (WIN32)
	list(APPEND FILESYSTEM_CXX_FILES
		src/win32/FileSystemWin32.cpp
		src/win32/OSWin32.cpp
		src/win32/TextUtils.cpp
	)
else (WIN32)
	list(APPEND FILESYSTEM_CXX_FILES
		src/posix/FileSystemPosix.cpp
		src/posix/OSPosix.cpp
	)
endif (WIN32)

configure_file(buildopts.h.cmakein buildopts.h @ONLY)

LIST(APPEND PIONEER_CXX_FILES ${FILESYSTEM_CXX_FILES})
if (MSVC)
	option(USE_PIONEER_THIRDPARTY "Use pioneer's thirdparty library repository." ON)
	if (USE_PIONEER_THIRDPARTY)
		list(APPEND CMAKE_PREFIX_PATH ${CMAKE_SOURCE_DIR}/pioneer-thirdparty/usr)
		include_directories(${CMAKE_SOURCE_DIR}/pioneer-thirdparty/usr/include)
		link_directories(${CMAKE_SOURCE_DIR}/pioneer-thirdparty/usr/lib)
		find_package(Threads)
	endif()
endif (MSVC)

if (USE_SYSTEM_LIBGLEW)
	add_library(GLEW::GLEW INTERFACE IMPORTED)
	find_package(GLEW REQUIRED)
endif (USE_SYSTEM_LIBGLEW)

if (USE_SYSTEM_LIBLUA)
	find_package(Lua 5.2 EXACT REQUIRED)
	include_directories(${LUA_INCLUDE_DIR})
	if (WIN32)
		add_definitions(-DLUA_BUILD_AS_DLL)
	endif (WIN32)
endif (USE_SYSTEM_LIBLUA)

if (PROFILER_ENABLED)
	add_definitions(-DPIONEER_PROFILER=1)
endif(PROFILER_ENABLED)

if (WIN32)
	add_definitions(-DPSAPI_VERSION=1)
endif (WIN32)

macro(set_cxx11_properties)
	set_target_properties(${ARGN} PROPERTIES
		CXX_STANDARD 11
		CXX_STANDARD_REQUIRED ON
		CXX_EXTENSIONS ON
	)
endmacro()

macro(define_pioneer_library library_name _src _header)
	add_library(${library_name} STATIC ${${_src}} ${${_header}})
	set_cxx11_properties(${library_name})
endmacro()

if (MSVC)
	include(msvc-defaults.cmake)
else (MSVC)
	find_package(PkgConfig REQUIRED)

	pkg_check_modules(SDL2 REQUIRED sdl2)
	pkg_check_modules(SDL2_IMAGE REQUIRED SDL2_image)

	pkg_check_modules(ASSIMP REQUIRED assimp)
	pkg_check_modules(SIGCPP REQUIRED sigc++-2.0)
	pkg_check_modules(VORBISFILE REQUIRED vorbisfile)
endif (MSVC)

find_package(Freetype REQUIRED)
find_package(OpenGL REQUIRED)

add_subdirectory(contrib/lz4)

include_directories(
	${CMAKE_SOURCE_DIR}/src
	${CMAKE_SOURCE_DIR}/contrib
	${ASSIMP_INCLUDE_DIRS}
	${FREETYPE_INCLUDE_DIRS}
	${OPENGL_INCLUDE_DIRS}
	${SDL2_INCLUDE_DIRS}
	${SDL2_IMAGE_INCLUDE_DIRS}
	${SIGCPP_INCLUDE_DIRS}
	${VORBISFILE_INCLUDE_DIRS}
	${GLEW_INCLUDE_DIRS}
)

if (NOT USE_SYSTEM_LIBGLEW)
	add_subdirectory(contrib/glew)
	add_library(GLEW::GLEW ALIAS glew)
	include_directories(contrib/glew)

	# Specify that we compile against a static build of Glew
	# (required on Windows)
	add_definitions(-DGLEW_STATIC)
endif (NOT USE_SYSTEM_LIBGLEW)
add_subdirectory(contrib/imgui)
add_subdirectory(contrib/jenkins)
add_subdirectory(contrib/PicoDDS)
add_subdirectory(contrib/profiler)
if (NOT USE_SYSTEM_LIBLUA)
	add_subdirectory(contrib/lua)
	set(LUA_LIBRARIES lua)
	include_directories(contrib/lua)
endif (NOT USE_SYSTEM_LIBLUA)

add_subdirectory(src/core)

define_pioneer_library(pioneer-lib PIONEER_CXX_FILES PIONEER_HXX_FILES)
target_link_libraries(pioneer-lib PUBLIC pioneer-core)

add_subdirectory(src/lua)

if (WIN32)
	string(TIMESTAMP BUILD_YEAR "%Y")
	set(RESOURCES ${CMAKE_BINARY_DIR}/pioneer.rc)
	configure_file(pioneer.rc.cmakein ${RESOURCES} @ONLY)
endif()

link_directories(
	${ASSIMP_LIBRARY_DIRS}
	${SDL2_LIBRARY_DIRS}
	${SDL2_IMAGE_LIBRARY_DIRS}
	${SIGCPP_LIBRARY_DIRS}
	${VORBISFILE_LIBRARY_DIRS}
)

add_executable(${PROJECT_NAME} WIN32 src/main.cpp ${RESOURCES})
add_executable(modelcompiler WIN32 src/modelcompiler.cpp)
add_executable(savegamedump WIN32
	src/savegamedump.cpp
	src/JsonUtils.cpp
	src/FileSystem.cpp
	src/utils.cpp
	src/StringF.cpp
	src/GZipFormat.cpp
	src/DateTime.cpp
	src/Lang.cpp
	${FILESYSTEM_CXX_FILES}
	# This one's in here because there's no such thing as separation in the codebase.
	src/PngWriter.cpp
)

find_program(NATURALDOCS NAMES naturaldocs)
if (NATURALDOCS)
	add_custom_target(codedoc
		${CMAKE_COMMAND} -E make_directory codedoc
		COMMAND naturaldocs -i src/ -i data/libs/ -xi src/data/ -o HTML codedoc/ -p nd/ -do -ro -s Default Local
	WORKING_DIRECTORY ${PROJECT_SOURCE_DIR})
endif()

target_link_libraries(pioneer-lib PUBLIC lz4)

list(APPEND pioneerLibs
	pioneer-lib
	pioneer-lua
	${ASSIMP_LIBRARIES}
	${FREETYPE_LIBRARIES}
	${OPENGL_LIBRARIES}
	${SDL2_LIBRARIES}
	${SDL2_IMAGE_LIBRARIES}
	${SIGCPP_LIBRARIES}
	${VORBISFILE_LIBRARIES}
	${LUA_LIBRARIES}
	GLEW::GLEW
	imgui
	jenkins
	picodds
	profiler
)

if(USE_PIONEER_THIRDPARTY)
    list(APPEND pioneerLibs Threads::Threads)
endif()

if (WIN32)
	list(APPEND winLibs shlwapi psapi)
endif (WIN32)

target_link_libraries(${PROJECT_NAME} LINK_PRIVATE ${pioneerLibs} ${winLibs})
target_link_libraries(modelcompiler LINK_PRIVATE ${pioneerLibs} ${winLibs})
target_link_libraries(savegamedump LINK_PRIVATE ${SDL2_LIBRARIES} ${SDL2_IMAGE_LIBRARIES} profiler lz4 ${winLibs})

set_cxx11_properties(${PROJECT_NAME} modelcompiler savegamedump)

if(MSVC)
	add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
		COMMAND xcopy ..\\pioneer-thirdparty\\win32\\bin\\x64\\vs2017\\*.dll $(TargetDir)*.dll /Y /C
		WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
		COMMENT "copy the dlls into the directory"
		VERBATIM
	)
endif(MSVC)

if (CMAKE_CROSSCOMPILING)
	find_program(MODELCOMPILER modelcompiler DOC "modelcompiler executable for the host")
else (CMAKE_CROSSCOMPILING)
	set(MODELCOMPILER $<TARGET_FILE:modelcompiler>)
endif (CMAKE_CROSSCOMPILING)

if (MODELCOMPILER)
	# Optimize the models.
	# This really shouldn't be done inside the source tree...
	if (NOT MSVC)
		add_custom_command(TARGET modelcompiler POST_BUILD
			COMMAND ${CMAKE_COMMAND} -E env SDL_VIDEODRIVER=dummy ${MODELCOMPILER} -b inplace
			WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
			COMMENT "Optimizing models" VERBATIM
		)
	endif (NOT MSVC)
else (MODELCOMPILER)
	message(WARNING "No modelcompiler provided, models won't be optimized!")
endif(MODELCOMPILER)

install(TARGETS ${PROJECT_NAME} modelcompiler savegamedump
	RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)
install(DIRECTORY data/
	DESTINATION ${PIONEER_DATA_DIR}
	REGEX "/models" EXCLUDE
	PATTERN ".gitignore" EXCLUDE
	PATTERN "listdata.*" EXCLUDE
	PATTERN "Makefile.am" EXCLUDE
)
install(DIRECTORY data/models/
	DESTINATION ${PIONEER_DATA_DIR}/models
	FILES_MATCHING PATTERN "*.sgm" PATTERN "*.dds" PATTERN "*.png"
)

if (WIN32)
	configure_file(pioneer.iss.cmakein pioneer.iss @ONLY)

	install(CODE "include(BundleUtilities)
	fixup_bundle(\"$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/pioneer.exe\" \"\" \"${CMAKE_PROGRAM_PATH}\")"
	COMPONENT Runtime)
endif (WIN32)

if (UNIX)
	set(PIONEER_DESKTOP_FILE ${CMAKE_BINARY_DIR}/metadata/net.pioneerspacesim.Pioneer.desktop)
	configure_file(metadata/net.pioneerspacesim.Pioneer.desktop.cmakein ${PIONEER_DESKTOP_FILE} @ONLY)
	install(FILES ${PIONEER_DESKTOP_FILE}
		DESTINATION ${CMAKE_INSTALL_DATADIR}/applications
	)
	install(FILES metadata/net.pioneerspacesim.Pioneer.appdata.xml
		DESTINATION ${CMAKE_INSTALL_DATADIR}/appdata
	)

	foreach(_i IN ITEMS 16 22 24 32 40 48 64 128 256)
		install(FILES application-icon/pngs/pioneer-${_i}x${_i}.png
			DESTINATION ${CMAKE_INSTALL_DATADIR}/icons/hicolor/${_i}x${_i}/apps
			RENAME net.pioneerspacesim.Pioneer.png
		)
	endforeach()
endif (UNIX)