# Common functions and settings for LSL

option(LSL_DEPLOYAPPLIBS "Copy library dependencies (at the moment Qt + liblsl) to the installation dir" ON)
option(LSL_COMFY_DEFAULTS "Set some quality of life options, e.g. a sensible 'install' directory" OFF)

macro(LSLAPP_Setup_Boilerplate)
	message(WARNING "This function is deprecated, set LSL_COMFY_DEFAULTS instead")
	set(LSL_COMFY_DEFAULTS ON)
endmacro()

# helper script to determine the target architecture for package naming
# The code below is compiled with the target compiler so it should work even
# when cross compiling and doesn't require the executable to be run
function(LSL_get_target_arch)
	if(LSL_ARCH)
		return()
	endif()
	file(WRITE "${CMAKE_BINARY_DIR}/arch.c" "
#if defined(__ARM_ARCH_ISA_A64) || defined(__aarch64__)
#error cmake_ARCH arm64
#elif defined(__arm__) || defined(__TARGET_ARCH_ARM)
#error cmake_ARCH arm
#elif defined(__i386) || defined(__i386__) || defined(_M_IX86)
#error cmake_ARCH i386
#elif defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(_M_X64)
#error cmake_ARCH amd64
#elif defined(__ia64) || defined(__ia64__) || defined(_M_IA64)
#error cmake_ARCH ia64
#elif defined(__ppc__) || defined(__ppc) || defined(__powerpc__) \\
  || defined(_ARCH_COM) || defined(_ARCH_PWR) || defined(_ARCH_PPC)  \\
  || defined(_M_MPPC) || defined(_M_PPC)
#if defined(__ppc64__) || defined(__powerpc64__) || defined(__64BIT__)
#error cmake_ARCH ppc64
#else
#error cmake_ARCH powerpc
#endif
#else
#error cmake_ARCH unknown
#endif")
	enable_language(C)
	try_compile(dummy_result "${CMAKE_BINARY_DIR}"
		SOURCES "${CMAKE_BINARY_DIR}/arch.c"
		OUTPUT_VARIABLE ARCH)
	string(REGEX REPLACE ".*cmake_ARCH ([a-z0-9]+).*" "\\1" ARCH "${ARCH}")
	message(STATUS "Detected architecture: ${ARCH}")
	set(LSL_ARCH "${ARCH}" CACHE INTERNAL "target architecture")
endfunction()

message(STATUS "Included LSL CMake helpers, rev. 15, ${CMAKE_CURRENT_LIST_DIR}")

# set build type and default install dir if not done already or undesired
if(LSL_COMFY_DEFAULTS AND NOT CMAKE_BUILD_TYPE)
	message(STATUS "CMAKE_BUILD_TYPE was default initialized to Release")
	set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Build type" FORCE)
endif()
if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT AND LSL_COMFY_DEFAULTS)
	set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH
		"Where to put redistributable binaries" FORCE)
endif()

if(LSL_COMFY_DEFAULTS)
	# Generate folders for IDE targets (e.g., VisualStudio solutions)
	set_property(GLOBAL PROPERTY USE_FOLDERS ON)

	# Qt5, include e.g. "mainwindow.h"
	set(CMAKE_INCLUDE_CURRENT_DIR ON)
endif()

# LSL functions, mostly for Apps

# installs additional files (configuration etc.)
function(installLSLAuxFiles target)
	get_target_property(is_bundle ${target} MACOSX_BUNDLE)
	set(destdir ${PROJECT_NAME})
	if(LSL_UNIXFOLDERS)
		include(GNUInstallDirs)
		set(destdir "${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME}")
	elseif(is_bundle AND APPLE)
		set(destdir ${destdir}/${target}.app/Contents/MacOS)
	endif()
	if("${ARGV1}" STREQUAL "directory")
		install(DIRECTORY ${ARGV2} DESTINATION ${destdir} COMPONENT "${PROJECT_NAME}")
	else()
		install(FILES ${ARGN} DESTINATION ${destdir} COMPONENT "${PROJECT_NAME}")
	endif()
endfunction()

# installLSLApp: adds the specified target to the install list and
# add some quality-of-life improvements for Qt executables
# After the target, additional libraries to install alongside the target can be
# specified, e.g. 	installLSLApp(FooApp libXY libZ)
function(installLSLApp target)
	get_target_property(TARGET_LIBRARIES ${target} LINK_LIBRARIES)
	string(REGEX MATCH ";Qt[56]?::" qtapp ";${TARGET_LIBRARIES}")
	if(qtapp)
		# Enable automatic compilation of .cpp->.moc, xy.ui->ui_xy.h and resource files
		set_target_properties(${target} PROPERTIES
			AUTOMOC ON
			AUTOUIC ON
			AUTORCC ON
		)
	endif()

	# Set runtime path, i.e. where shared libs are searched relative to the exe
	# CMake>=3.16: set(LIBDIR "../$<IF:$<BOOL:${LSL_UNIXFOLDERS}>,lib/,LSL/lib/>")
	if(LSL_UNIXFOLDERS)
		set(LIBDIR "../lib")
	else()
		set(LIBDIR "../LSL/lib")
	endif()
	if(APPLE AND NOT CMAKE_INSTALL_RPATH)
		set_property(TARGET ${target} APPEND
			PROPERTY INSTALL_RPATH "@executable_path/;@executable_path/${LIBDIR};@executable_path/../Frameworks")
	elseif(UNIX AND NOT CMAKE_INSTALL_RPATH)
		set_property(TARGET ${target}
			PROPERTY INSTALL_RPATH "\$ORIGIN:\$ORIGIN/${LIBDIR}")
	endif()

	if(LSL_UNIXFOLDERS)
		include(GNUInstallDirs)
		set(lsldir "\${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
	else()
		set(CMAKE_INSTALL_BINDIR ${PROJECT_NAME})
		set(CMAKE_INSTALL_LIBDIR ${PROJECT_NAME})
		set(lsldir "\${CMAKE_INSTALL_PREFIX}/LSL")
	endif()
	
	# add start menu shortcut if supported by installer
	set_property(INSTALL "${CMAKE_INSTALL_BINDIR}/$<TARGET_FILE_NAME:${target}>" PROPERTY
		CPACK_START_MENU_SHORTCUTS "${target}")

	# install additional library dependencies supplied after the target argument
	foreach(libdependency ${ARGN})
		if(NOT TARGET ${libdependency})
			message(FATAL_ERROR "Additional arguments to installLSLApp must be library targets, ${libdependency} isn't.")
		endif()
		install(CODE "file(INSTALL $<TARGET_FILE:${libdependency}> DESTINATION \${CMAKE_INSTALL_PREFIX}/$<IF:$<PLATFORM_ID:Windows>,${CMAKE_INSTALL_BINDIR},${CMAKE_INSTALL_LIBDIR}>)")
	endforeach()

	set_property(GLOBAL APPEND PROPERTY
		"LSLDEPENDS_${PROJECT_NAME}" liblsl)
	install(TARGETS ${target} COMPONENT ${PROJECT_NAME}
		RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
		LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
		ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
		BUNDLE DESTINATION ${CMAKE_INSTALL_BINDIR})
	# skip copying libraries if disabled or on Linux
	if(NOT LSL_DEPLOYAPPLIBS OR UNIX AND NOT APPLE)
		return()
	endif()

	# skip exe deployment for libraries
	get_target_property(target_type ${target} TYPE)
	if(NOT target_type STREQUAL "EXECUTABLE")
		return()
	endif()
	
	# Some Windows installers have problems with several components having the same file,
	# so libs shared between targets are copied into the SHAREDLIBCOMPONENT component if set
	if(NOT SHAREDLIBCOMPONENT)
		set(SHAREDLIBCOMPONENT ${PROJECT_NAME})
	endif()

	# For MacOS we need to know if the installed target will be a .app bundle...
	if(APPLE)
		get_target_property(target_is_bundle ${target} MACOSX_BUNDLE)
		set(APPLE_APP_PATH "\${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/${target}.app")
	endif(APPLE)
	
	# Copy lsl library. Logic is a bit complicated.
	# If we are not building liblsl, and the (app) target is not using system liblsl
	# (LSL_UNIXFOLDERS is maybe a poor proxy for use of system liblsl...),
	# then the application needs to have liblsl in an expected location.
	if(NOT TARGET liblsl AND NOT LSL_UNIXFOLDERS)
		if(APPLE AND target_is_bundle)
			# Copy the dylib into the bundle
			install(FILES $<TARGET_FILE:LSL::lsl>
				DESTINATION ${CMAKE_INSTALL_BINDIR}/${target}.app/Contents/MacOS/
				COMPONENT ${SHAREDLIBCOMPONENT})
		else()
			# Copy the dll/dylib/so next to the executable binary.
			install(FILES $<TARGET_FILE:LSL::lsl>
				DESTINATION ${CMAKE_INSTALL_BINDIR}
				COMPONENT ${SHAREDLIBCOMPONENT})
		endif(APPLE AND target_is_bundle)
	endif(NOT TARGET liblsl AND NOT LSL_UNIXFOLDERS)
	# Mac bundles need further fixup (mostly for 3rd party libs)
	# Only use fixup_bundle for non-Qt, as it is too complicated to provide all Qt libs
	#  to the third argument of fixup_bundle, especially when macdeployqt can do it for us.
	if(APPLE AND target_is_bundle AND NOT qtapp)
		install(CODE
			"
				get_filename_component(LIBDIR $<TARGET_FILE:LSL::lsl> DIRECTORY)
				message(STATUS \${LIBDIR})
				include(BundleUtilities)
				set(BU_CHMOD_BUNDLE_ITEMS ON)
				fixup_bundle(${APPLE_APP_PATH} \"\" \"\${LIBDIR}\")
			"
			COMPONENT ${PROJECT_NAME}
		)
	endif()

	# skip the rest if qt doesn't need to be deployed
	if(NOT qtapp)
		return()
	endif()

	cmake_minimum_required(VERSION 3.15) # generator expressions in install(CODE)
	if(WIN32)
		findQtInstallationTool("windeployqt")
		install(CODE "
			message (STATUS \"Running windeployqt on $<TARGET_FILE:${target}>\")
			set(qml_dir $<TARGET_PROPERTY:${target},qml_directory>)
			message(STATUS \"qml directory: \${qml_dir}\")
			execute_process(
				COMMAND \"${QT_DEPLOYQT_EXECUTABLE}\"
				\$<\$<BOOL:\${qml_dir}>:--qmldir \"\${qml_dir}\">
				--no-translations
				--no-system-d3d-compiler --no-opengl-sw
				--no-compiler-runtime --dry-run --list mapping
				\"$<TARGET_FILE:${target}>\"
				OUTPUT_VARIABLE output
				OUTPUT_STRIP_TRAILING_WHITESPACE
			)
			file(TO_CMAKE_PATH \"\${output}\" output) # convert slashes
			separate_arguments(_files WINDOWS_COMMAND \${output})
			while(_files)
				list(POP_FRONT _files _src)
				list(POP_FRONT _files _dest)
				get_filename_component(_dest \${_dest} DIRECTORY RELATIVE)
				file(COPY \${_src} DESTINATION \${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/\${_dest})
			endwhile()"
			COMPONENT ${SHAREDLIBCOMPONENT})
	elseif(APPLE)
		# It should be enough to call fixup_bundle (see above),
		# but this fails to install qt plugins (cocoa).
		# Use macdeployqt instead. This is bad at grabbing lsl dylib, so we already did it above.
		findQtInstallationTool("macdeployqt")
		install(CODE "
			message(STATUS \"Running Qt Deploy Tool for $<TARGET_FILE:${target}>...\")
			execute_process(COMMAND
				\"${QT_DEPLOYQT_EXECUTABLE}\"
				\"${APPLE_APP_PATH}\"
				-verbose=1 -always-overwrite
				\$<\$<STREQUAL:\${CMAKE_INSTALL_CONFIG_NAME},\"Debug\">:--use-debug-libs>
				COMMAND_ECHO STDOUT
				OUTPUT_VARIABLE DEPLOYOUTPUT
				ERROR_VARIABLE DEPLOYOUTPUT
				RESULT_VARIABLE DEPLOYSTATUS
			)
			if(\${DEPLOYSTATUS})
				message(WARNING \"\${DEPLOYOUTPUT}\")
			endif()
			" COMPONENT ${PROJECT_NAME})
	endif()
endfunction()

function(findQtInstallationTool qtdeploytoolname)
	if(QT_DEPLOYQT_EXECUTABLE)
		return()
	endif()
	get_target_property(QT_QMAKE_EXE Qt::qmake IMPORTED_LOCATION)
	get_filename_component(QT_BIN_DIR "${QT_QMAKE_EXE}" DIRECTORY)
	find_program (QT_DEPLOYQT_EXECUTABLE ${qtdeploytoolname} HINTS "${QT_BIN_DIR}")
	if (QT_DEPLOYQT_EXECUTABLE)
		message(STATUS "Qt deploy tool found at ${QT_DEPLOYQT_EXECUTABLE}")
	else()
		message(WARNING "Qt deploy tool wasn't found, installing ${PROJECT_NAME} will fail!")
		return()
	endif()
endfunction()

macro(LSLGenerateCPackConfig)
	# CPack configuration
	string(TOUPPER "${PROJECT_NAME}" PROJECT_NAME_UPPER)
	if(NOT PROJECT_DESCRIPTION)
		set(PROJECT_DESCRIPTION "${PROJECT_NAME} ${PROJECT_VERSION}")
	endif()
	set("CPACK_COMPONENT_${PROJECT_NAME_UPPER}_DESCRIPTION" "${PROJECT_DESCRIPTION}" CACHE INTERNAL "CPack Description")

	# top level CMakeLists.txt?
	if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
		LSL_get_target_arch()
		# CPack configuration
		set(CPACK_PACKAGE_INSTALL_DIRECTORY "lsl")
		set(CPACK_STRIP_FILES ON)
		set(CPACK_ARCHIVE_COMPONENT_INSTALL ON)
		set(CPACK_PACKAGE_NAME lsl)
		set(CPACK_PACKAGE_VENDOR "Labstreaminglayer")
		if(APPLE)
			set(LSL_CPACK_DEFAULT_GEN TBZ2)
			if(DEFINED ENV{OSXVER})
				# Configured by Travis-CI for multi-osx builds.
				set(LSL_OS "$ENV{OSXVER}")
			else()
				set(LSL_OS "OSX${lslplatform}")
			endif(DEFINED ENV{OSXVER})
		elseif(WIN32)
			set(LSL_CPACK_DEFAULT_GEN ZIP)
			set(CPACK_NSIS_MODIFY_PATH ON)
			set(CPACK_WIX_CMAKE_PACKAGE_REGISTRY ON)
			set(CPACK_WIX_UPGRADE_GUID "ee28a351-3b27-4c2b-8b48-259c87d1b1b4")
			set(CPACK_WIX_PROPERTY_ARPHELPLINK
				"https://labstreaminglayer.readthedocs.io/info/getting_started.html#getting-help")
			set(LSL_OS "Win")
		elseif(UNIX)
			set(LSL_CPACK_DEFAULT_GEN DEB)
			set(LSL_OS "Linux")
			set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Tristan Stenner <ttstenner@gmail.com>")

			set(CPACK_DEBIAN_ENABLE_COMPONENT_DEPENDS ON)
			set(CPACK_DEB_COMPONENT_INSTALL ON)
			set(CPACK_DEBIAN_PACKAGE_PRIORITY optional)
			set(CPACK_DEBIAN_LIBLSL_PACKAGE_SHLIBDEPS ON)
			set(CPACK_DEBIAN_PACKAGE_GENERATE_SHLIBS ON)

			# include distribution name (e.g. trusty or xenial) in the file name
			find_program(LSB_RELEASE lsb_release)
			execute_process(COMMAND ${LSB_RELEASE} -cs
				OUTPUT_VARIABLE LSB_RELEASE_CODENAME
				OUTPUT_STRIP_TRAILING_WHITESPACE
				RESULT_VARIABLE LSB_RELEASE_RESULT
			)
			if(LSB_RELEASE_CODENAME AND NOT LSB_RELEASE_CODENAME STREQUAL "n/a")
				set(CPACK_DEBIAN_PACKAGE_RELEASE ${LSB_RELEASE_CODENAME})
				set(LSL_OS "${LSB_RELEASE_CODENAME}")
			endif()
		endif()
		set(CPACK_GENERATOR ${LSL_CPACK_DEFAULT_GEN} CACHE STRING "CPack pkg type(s) to generate")
		get_cmake_property(LSL_COMPONENTS COMPONENTS)
		foreach(component ${LSL_COMPONENTS})
			string(TOUPPER ${component} COMPONENT)
			set(LSL_CPACK_FILENAME "${component}-${PROJECT_VERSION}-${LSL_OS}_${LSL_ARCH}")
			get_property(LSLDEPENDS GLOBAL PROPERTY "LSLDEPENDS_${component}")
			if(LSLDEPENDS)
				list(REMOVE_DUPLICATES LSLDEPENDS)
				# remove dependencies we don't package ourselves
				set(MISSING ${LSLDEPENDS})
				list(REMOVE_ITEM MISSING ${LSL_COMPONENTS})
				if(MISSING)
					list(REMOVE_ITEM LSLDEPENDS ${MISSING})
				endif()
				set("CPACK_COMPONENT_${COMPONENT}_DEPENDS" ${LSLDEPENDS})
			endif()

			set("CPACK_DEBIAN_${COMPONENT}_PACKAGE_NAME" ${component})
			set("CPACK_DEBIAN_${COMPONENT}_FILE_NAME" "${LSL_CPACK_FILENAME}.deb")
			set("CPACK_ARCHIVE_${COMPONENT}_FILE_NAME" ${LSL_CPACK_FILENAME})
		endforeach()

		message(STATUS "Installing Components: ${LSL_COMPONENTS}")

		# force component install even if only one component is to be installed
		set(CPACK_COMPONENTS_ALL ${LSL_COMPONENTS})
		include(CPack)
	endif()
endmacro()