PROJECT( arcan_vr )
cmake_minimum_required(VERSION 3.1.0 FATAL_ERROR)
find_package(PkgConfig REQUIRED)

if (CMAKE_BUILD_TYPE STREQUAL "Debug")
	add_definitions(-D_DEBUG)
endif()

set(ARCAN_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../)
set(CMAKE_MODULE_PATH ${ARCAN_ROOT_DIR}/src/platform/cmake/modules)

include(FindPkgConfig)
if (ARCAN_SOURCE_DIR)
	add_subdirectory(${ARCAN_SOURCE_DIR}/shmif ashmif)
else()
	find_package(arcan_shmif REQUIRED)
endif()

add_definitions(
	-D__UNIX
	-DPOSIX_C_SOURCE
	-DGNU_SOURCE
	-Wall
	-Wno-unused-const-variable
	-Wno-unused-function
	${CMAKE_THREADS_LIBS_INIT}
)

include_directories(
	${ARCAN_SHMIF_INCLUDE_DIR}
	${ARCAN_ROOT_DIR}/src/engine
)

set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Math REQUIRED)
find_package(RT REQUIRED)
find_package(Threads REQUIRED)
find_package(DL REQUIRED)

SET(LIBRARIES
	Threads::Threads
	Math::Math
	RT::RT
	DL::DL
	${ARCAN_SHMIF_LIBRARY}
)

if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
	list(APPEND PLATFORM_SOURCES ${ARCAN_ROOT_DIR}/src/platform/darwin/time.c)
else()
	list(APPEND PLATFORM_SOURCES ${ARCAN_ROOT_DIR}/src/platform/posix/time.c)
endif()

if (DEFINED NO_BUILTIN_HIDAPI)
	pkg_check_modules(HIDAPI REQUIRED hidapi)
	include_directories(${HIDAPI_INCLUDE_DIRS})
	list(APPEND LIBRARIES ${HIDAPI_LINK_LIBRARIES})
else()
	include_directories(${ARCAN_ROOT_DIR}/external/hidapi)
	if (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
		pkg_check_modules(LIBUSB_1 REQUIRED libusb-1.0)
		include_directories(${LIBUSB_1_INCLUDE_DIRS})
		list(APPEND LIBRARIES ${LIBUSB_1_LINK_LIBRARIES})
		list(APPEND PLATFORM_SOURCES ${ARCAN_ROOT_DIR}/external/hidapi/hid.c)
	elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
		find_library(IOKIT NAMES IOKit)
		find_library(COREFOUNDATION NAMES CoreFoundation)
		list(APPEND LIBRARIES ${IOKIT} ${COREFOUNDATION})
		list(APPEND PLATFORM_SOURCES ${ARCAN_ROOT_DIR}/external/hidapi/hid_darwin.c)
	elseif (${CMAKE_SYSTEM_NAME} MATCHES "BSD|DragonFly")
		pkg_check_modules(LIBUSB_1 REQUIRED libusb-1.0)
		add_definitions(-DLIBUSB_BSD)
		include_directories(${LIBUSB_1_INCLUDE_DIRS})
		list(APPEND LIBRARIES ${LIBUSB_1_LINK_LIBRARIES})
		include(CheckSymbolExists)
		check_symbol_exists(iconv "iconv.h" HAVE_ICONV)
		if (NOT HAVE_ICONV)
			find_library(ICONV_LIBRARY NAMES iconv REQUIRED)
			list(APPEND LIBRARIES ${ICONV_LIBRARY})
		endif()
		list(APPEND PLATFORM_SOURCES ${ARCAN_ROOT_DIR}/external/hidapi/hid.c)
	else()
		list(APPEND PLATFORM_SOURCES ${ARCAN_ROOT_DIR}/external/hidapi/hid.c)
	endif()
endif()

set(SOURCES
	vrbridge.c
	ahrs.c
	openhmd.c
	test.c
	${ARCAN_ROOT_DIR}/src/engine/arcan_math.c
	${PLATFORM_SOURCES}
)

add_executable(${PROJECT_NAME} ${SOURCES})

if (DEFINED NO_BUILTIN_OPENHMD)
	pkg_check_modules(OPENHMD REQUIRED openhmd)
	if (OPENHMD_FOUND)
		include_directories(${OPENHMD_INCLUDE_DIRS})
		list(APPEND LIBRARIES ${OPENHMD_LINK_LIBRARIES})
		list(APPEND SOURCES openhmd.c)
		add_definitions(-DOPENHMD)
	endif()
else()
	add_subdirectory("OpenHMD")
	include_directories(${CMAKE_CURRENT_SOURCE_DIR}/OpenHMD)
	list(APPEND LIBRARIES openhmd)
endif()

target_link_libraries(${PROJECT_NAME} ${LIBRARIES})

install(TARGETS ${PROJECT_NAME} DESTINATION ${CMAKE_INSTALL_BINDIR})