CMAKE_MINIMUM_REQUIRED(VERSION 3.11)
CMAKE_POLICY(VERSION 3.13)

# C++14 is required
# Set here before we create any targets
set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

include(cmake/CmDaB.cmake)
include(cmake/test-functions.cmake)
include(cmake/autoheader.cmake)

project(PUPNP VERSION ${PUPNP_VERSION_STRING})

include(GNUInstallDirs)
include(cmake/options.cmake)

# Only set library postfix with MSVC toolchain
if(MSVC)
	set(CMAKE_DEBUG_POSTFIX d)
	set(STATIC_POSTFIX s)
endif()

if(EXISTS "${CMAKE_SOURCE_DIR}/.git")
	set(DEFAULT_BUILD_TYPE "Debug")
endif()

# Set the possible values of build type for cmake-gui
if(CMAKE_CONFIGURATION_TYPES)
	set(CMAKE_CONFIGURATION_TYPES "Debug;Release"
		CACHE STRING
		"Semicolon separated list of supported configuration types, only supports debug and release, anything else will be ignored"
		FORCE
	)

	set_property(CACHE CMAKE_CONFIGURATION_TYPES
		PROPERTY STRINGS
		"Debug" "Release"
	)
endif()

if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
	message(STATUS "Setting build type to '${DEFAULT_BUILD_TYPE}' as none was specified.")

	set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}" CACHE
		STRING "Choose the type of build." FORCE
	)
endif()

if(UPNP_ENABLE_OPEN_SSL)
	find_package(OpenSSL REQUIRED)
endif()

#
# Checks for header files (which aren't needed on Win32)
#
include(CheckIncludeFile)

if(NOT WIN32)
	set(HAVE_INET_H arpa/inet.h)
	set(HAVE_FCNTL_H fcntl.h)
	set(HAVE_INTTYPES_H inttypes.h)
	set(HAVE_LIMITS_H limits.h)
	set(HAVE_NETDB_H netdb.h)
	set(HAVE_IN_H netinet/in.h)
	set(HAVE_STDLIB_H stdlib.h)
	set(HAVE_STRING_H string.h)
	set(HAVE_IOCTL_H sys/ioctl.h)
	set(HAVE_TIME_H sys/time.h)
	set(HAVE_SYSLOG_H syslog.h)
	set(HAVE_UNISTD_H unistd.h)

	set(headers
		HAVE_INET_H
		HAVE_FCNTL_H
		HAVE_INTTYPES_H
		HAVE_LIMITS_H
		HAVE_NETDB_H
		HAVE_IN_H
		HAVE_STDLIB_H
		HAVE_STRING_H
		HAVE_IOCTL_H
		HAVE_TIME_H
		HAVE_SYSLOG_H
		HAVE_UNISTD_H
	)

	foreach(header ${headers})
		check_include_file(${${header}} ${header})

		if(NOT ${header})
			message(FATAL_ERROR "Header-file ${${header}} not found")
		endif()
	endforeach()
endif()

#
# Checks for typedefs, structures, and compiler characteristics
#
include(TestBigEndian)
test_big_endian(big_endian)
check_include_file(sys/socket.h HAVE_SOCKET_H)
check_include_file(ws2tcpip.h HAVE_WS2TCPIP_H)

if(HAVE_SOCKET_H)
	list(APPEND CMAKE_EXTRA_INCLUDE_FILES sys/socket.h)
elseif(HAVE_WS2TCPIP_H)
	list(APPEND CMAKE_EXTRA_INCLUDE_FILES ws2tcpip.h)
endif()

include(CheckTypeSize)
check_type_size(socklen_t SOCKLEN_T)
unset(CMAKE_EXTRA_INCLUDE_FILES)

if(NOT SOCKLEN_T)
	set(socklen_t "int")
endif()

#
# Checks for large-file-sensitivity
#
if(NOT HAVE_OFF_T_SIZE AND NOT MSVC)
	check_type_size(off_t OFF_T_SIZE)
	set(UPNP_LARGEFILE_SENSITIVE FALSE CACHE BOOL "whether the system defaults to 32bit off_t but can do 64bit when requested" FORCE)

	if(OFF_T_SIZE EQUAL 8)
		message(STATUS "System uses 64 bit, no flags needed")
	else()
		unset(HAVE_OFF_T_SIZE CACHE)
		set(CMAKE_REQUIRED_DEFINITIONS -D_FILE_OFFSET_BITS=64)
		check_type_size(off_t OFF_T_SIZE)

		if(OFF_T_SIZE EQUAL 8)
			message(STATUS "_FILE_OFFSET_BITS=64 needed")
			set(UPNP_LARGEFILE_SENSITIVE TRUE CACHE BOOL "whether the system defaults to 32bit off_t but can do 64bit when requested" FORCE)
			set(_FILE_OFFSET_BITS 64 CACHE BOOL "Number of bits in a file offset, on hosts where this is settable" FORCE)
		else()
			unset(HAVE_OFF_T_SIZE CACHE)
			set(CMAKE_REQUIRED_DEFINITIONS -D_LARGE_FILES)
			check_type_size(off_t OFF_T_SIZE)

			if(OFF_T_SIZE EQUAL 8)
				message(STATUS "_LARGE_FILES needed")
				set(_LARGE_FILES TRUE CACHE BOOL "Define for large files, on AIX-style hosts." FORCE)
				set(UPNP_LARGEFILE_SENSITIVE TRUE CACHE BOOL "whether the system defaults to 32bit off_t but can do 64bit when requested" FORCE)
			endif()
		endif()
	endif()
elseif(MSVC)
	set(_LARGE_FILES TRUE CACHE BOOL "Define for large files, on AIX-style hosts." FORCE)
	set(UPNP_LARGEFILE_SENSITIVE TRUE CACHE BOOL "whether the system defaults to 32bit off_t but can do 64bit when requested" FORCE)
endif()

unset(CMAKE_REQUIRED_DEFINITIONS)

#
# Checks for library functions
#
include(CheckFunctionExists)
check_function_exists(fseeko HAVE_FSEEKO)

if(NOT HAVE_FSEEKO)
	set(CMAKE_REQUIRED_DEFINITIONS _LARGEFILE_SOURCE)
	check_function_exists(fseeko HAVE_FSEEKO)
	unset(CMAKE_REQUIRED_DEFINITIONS)

	if(HAVE_FSEEKO)
		set(_LARGEFILE_SOURCE TRUE CACHE BOOL "Define to 1 to make fseeko visible on some hosts (e.g. glibc 2.2)." FORCE)
	endif()
endif()

check_function_exists(strnlen HAVE_STRNLEN)
check_function_exists(strndup HAVE_STRNDUP)

include(CheckCCompilerFlag)
check_c_compiler_flag(-fmacro-prefix-map=from=to HAVE_MACRO_PREFIX_MAP)

if(Solaris)
	set(CMAKE_REQUIRED_LIBRARIES socket)
	check_function_exists(bind HAVE_SOCKET)
	set(CMAKE_REQUIRED_LIBRARIES rt)
	check_function_exists(sched_getparam HAVE_RT)
	unset(CMAKE_REQUIRED_LIBRARIES)
endif()

#
# Checks for POSIX Threads
#
if(NOT MSVC)
	set(THREADS_PREFER_PTHREAD_FLAG TRUE)
	include(FindThreads)

	if(NOT DOWNLOAD_AND_BUILD_DEPS)
		if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.18)
			add_library(Threads::Shared ALIAS Threads::Threads)
			add_library(Threads::Static ALIAS Threads::Threads)
		else()
			add_library(Threads::Shared INTERFACE IMPORTED)
			add_library(Threads::Static INTERFACE IMPORTED)

			# The following two blocks replicate the original FindThreads
			if(THREADS_HAVE_PTHREAD_ARG)
				set_property(TARGET Threads::Shared PROPERTY
					INTERFACE_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler -pthread>"
					"$<$<NOT:$<COMPILE_LANGUAGE:CUDA>>:-pthread>"
				)

				set_property(TARGET Threads::Static PROPERTY
					INTERFACE_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler -pthread>"
					"$<$<NOT:$<COMPILE_LANGUAGE:CUDA>>:-pthread>"
				)
			endif()

			if(CMAKE_THREAD_LIBS_INIT)
				get_target_property(thread_location Threads::Threads INTERFACE_LINK_LIBRARIES)

				set_target_properties(Threads::Shared PROPERTIES
					INTERFACE_LINK_LIBRARIES ${thread_location}
				)

				set_target_properties(Threads::Static PROPERTIES
					INTERFACE_LINK_LIBRARIES ${thread_location}
				)
			endif()
		endif()
	endif()
else()
	find_package(PTHREADS4W CONFIG REQUIRED)
endif()

#
# Determine if pthread_rwlock_t is available
#
if(TARGET Threads::Threads)
	set(CMAKE_EXTRA_INCLUDE_FILES pthread.h)

	if(DOWNLOAD_AND_BUILD_DEPS AND NOT PTHREADS4W_DIR)
		set(CMAKE_REQUIRED_INCLUDES ${PTHREADS4W_SOURCE_DIR})
	else()
		if(NOT Threads_FOUND)
			get_target_property(CMAKE_REQUIRED_INCLUDES Threads::Threads INTERFACE_INCLUDE_DIRECTORIES)
		endif()
	endif()

	check_type_size(pthread_rwlock_t UPNP_USE_RWLOCK)
	unset(CMAKE_EXTRA_INCLUDE_FILES)
	unset(CMAKE_REQUIRED_INCLUDES)
endif()

configure_file(${PUPNP_SOURCE_DIR}/upnp/inc/upnpconfig.h.cm ${PUPNP_BINARY_DIR}/upnp/inc/upnpconfig.h)
configure_file(${PUPNP_SOURCE_DIR}/upnp/sample/common/config_sample.h.cm ${PUPNP_BINARY_DIR}/upnp/sample/common/config_sample.h)
configure_file(${PUPNP_BINARY_DIR}/autoconfig.h.cm ${PUPNP_BINARY_DIR}/autoconfig.h)

add_subdirectory(ixml)
add_subdirectory(upnp)

install(EXPORT UPNP
	DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/UPNP
)

include(CMakePackageConfigHelpers)

configure_package_config_file(
	IXML.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/IXMLConfig.cmake
	INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/IXML
)

write_basic_package_version_file(IXMLConfigVersion.cmake
	VERSION ${IXML_VERSION_STRING}
	COMPATIBILITY SameMajorVersion
)

configure_package_config_file(
	UPNP.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/UPNPConfig.cmake
	INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/UPNP
)

write_basic_package_version_file(UPNPConfigVersion.cmake
	VERSION ${UPNP_VERSION_STRING}
	COMPATIBILITY SameMajorVersion
)

install(FILES
	${CMAKE_CURRENT_BINARY_DIR}/IXMLConfig.cmake
	${CMAKE_CURRENT_BINARY_DIR}/IXMLConfigVersion.cmake
	DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/IXML/
)

install(FILES
	${CMAKE_CURRENT_BINARY_DIR}/UPNPConfig.cmake
	${CMAKE_CURRENT_BINARY_DIR}/UPNPConfigVersion.cmake
	DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/UPNP/
)

set(VERSION ${PUPNP_VERSION_STRING})
set(prefix ${CMAKE_INSTALL_PREFIX})
set(exec_prefix "\${prefix}")
set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
set(PTHREAD_CFLAGS ${CMAKE_THREAD_LIBS_INIT})

if(UPNP_ENABLE_OPEN_SSL)
	set(OPENSSL_LIBS "-lssl")
endif()

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libupnp.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libupnp.pc @ONLY)

install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libupnp.pc
	DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig
)

if(BUILD_TESTING)
	enable_testing()
	find_package(GTest CONFIG)

	if(GTest_FOUND)
		add_subdirectory(gtest)
	endif()
endif()

if(FUZZER)
	if(NOT CMAKE_C_COMPILER_ID STREQUAL "Clang")
		message(WARNING "CMAKE_C_COMPILER_ID = ${CMAKE_C_COMPILER_ID}")
		message(FATAL_ERROR "Compiling with clang is required for libFuzzer")
	endif()

	add_subdirectory(fuzzer)
endif()
