#
# This file is part of the Simutrans project under the Artistic License.
# (see LICENSE.txt)
#

cmake_minimum_required(VERSION 3.16)

# Disable in-source builds
if (CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
	message(FATAL_ERROR "Building Simutrans in-source is not supported. "
		"Please delete ${CMAKE_SOURCE_DIR}/CMakeCache.txt and configure in a different "
		"(preferrably empty) directory.")
endif (CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)

set(CMAKE_WARN_DEPRECATED ON)
list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/")

include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/SimutransVcpkgTriplet.cmake)

project(simutrans LANGUAGES C CXX)

# Force C++14 everywhere
if(SIMUTRANS_STEAM_BUILT)
	set(CMAKE_CXX_STANDARD 17)
else()
	set(CMAKE_CXX_STANDARD 14)
endif()
set(CMAKE_CXX_STANDARD_REQUIRED YES)
set(CMAKE_CXX_EXTENSIONS OFF)

include(TestBigEndian)
TEST_BIG_ENDIAN(SIMUTRANS_BIG_ENDIAN)

if (MINGW)
	set(CMAKE_FIND_LIBRARY_SUFFIXES ".a" ON)
	set(CMAKE_EXE_LINKER_FLAGS "-static -static-libgcc -static-libstdc++")
endif ()

if (APPLE)
	list(APPEND CMAKE_PREFIX_PATH "/usr/local/opt/readline")
	link_directories(/usr/local/lib /opt/homebrew/lib)
	set(CMAKE_EXE_LINKER_FLAGS "-framework Cocoa")
endif ()


#
# Dependencies
#
include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/SimutransFindDependencies.cmake)


#
# Configuration options
#
include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/SimutransBackend.cmake) # Select backend (SDL2 / GDI)
include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/SimutransCompileOptions.cmake)


# CMake does not fill in CMAKE_BUILD_TYPE automatically.
if (NOT MSVC)
	if (NOT DEFINED CMAKE_BUILD_TYPE OR CMAKE_BUILD_TYPE STREQUAL "")
		set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Build type. Valid values are Debug Release MinSizeRel RelWithDebInfo" FORCE)
	endif ()
	set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS Debug Release MinSizeRel RelWithDebInfo)
endif (NOT MSVC)


#
# sources
#
if(ANDROID)
	add_library(simutrans SHARED)
	target_link_libraries(simutrans PRIVATE android log)
	target_sources(simutrans PRIVATE src/android/android.cc)
else ()
	add_executable(simutrans MACOSX_BUNDLE)
endif ()
if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
	set_target_properties(simutrans PROPERTIES WIN32_EXECUTABLE 1)
endif ()

include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/SimutransSourceList.cmake)


#
# output directory
#
file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/simutrans)
set_target_properties( simutrans PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/simutrans/$<0:> )


#
# Generate revision on compile time (so only if needed) if no revision is given
#
if (${SIMUTRANS_USE_REVISION})
	file(WRITE ${CMAKE_CURRENT_SOURCE_DIR}/src/simutrans/revision.h "#define REVISION ${SIMUTRANS_USE_REVISION}\n")
	message(STATUS "Compiling Simutrans with manually specified revision ${SIMUTRANS_USE_REVISION}")
	set(SIMUTRANS_WC_REVISION ${SIMUTRANS_USE_REVISION})
	set(SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
	include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/SimutransGenerateMetainfo.cmake)
else ()
	string(FIND ${CMAKE_GENERATOR} "Visual Studio" VS )
	if (${VS} EQUAL 0)
		# using a script for MSVC project files
		file(WRITE ${CMAKE_CURRENT_SOURCE_DIR}/src/simutrans/revision.h "#define REVISION \n")
		add_custom_command(TARGET simutrans PRE_BUILD
			WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
			COMMAND cscript.exe ARGS "/Nologo tools/revision.jse"
			COMMENT "Find SVN revision"
		)
	else ()
		# using custom target svnhear that is always built to update the revision.h file using cmake script
		add_custom_target(svnheader ALL DEPENDS svn_header)
		add_custom_command(OUTPUT svn_header COMMAND ${CMAKE_COMMAND} -DSOURCE_DIR=${CMAKE_CURRENT_SOURCE_DIR} -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/SimutransRevision.cmake)
		set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/src/simutrans/revision.h PROPERTIES GENERATED TRUE HEADER_FILE_ONLY TRUE)
		add_dependencies(simutrans svnheader)
	endif ()
endif ()


#
# Documentation
#
find_package(Doxygen)

if (DOXYGEN_FOUND)
	if (DOXYGEN_HAVE_DOT)
		# DOXYGEN_DOT_PATH is deprecated, see
		# https://cmake.org/cmake/help/latest/module/FindDoxygen.html#variable:DOXYGEN_DOT_PATH
		get_target_property(graphviz_dot_executable doxygen::dot IMPORTED_LOCATION)
		get_filename_component(graphviz_dot_temp_dir ${GRAPHVIZ_DOT_EXE} DIRECTORY)
		file(TO_NATIVE_PATH "${graphviz_dot_temp_dir}" graphviz_dot_dir)
	endif ()

	configure_file(
		documentation/Doxyfile.in
		documentation/Doxyfile
		@ONLY
	)

	doxygen_add_docs(docs_simutrans
		CONFIG_FILE ${CMAKE_CURRENT_BINARY_DIR}/documentation/Doxyfile
	)

	add_custom_target(docs DEPENDS docs_simutrans)

	# The sqapi doxygen file depends on .sh shell scripts to filter files
	if (LINUX OR MINGW)
		configure_file(
			documentation/DoxyfileSQAPI.in
			documentation/DoxyfileSQAPI
			@ONLY
		)

		doxygen_add_docs(docs_sqapi
			CONFIG_FILE       ${CMAKE_CURRENT_BINARY_DIR}/documentation/DoxyfileSQAPI
			WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/src/simutrans/script/api/
		)

		add_dependencies(docs docs_sqapi)
	endif ()
endif ()


#
# Libraries
#

target_link_libraries(simutrans PRIVATE PNG::PNG)

if (WIN32)
	target_sources(simutrans PRIVATE src/Windows/simres.rc)
	target_sources(simutrans PRIVATE src/simutrans/sys/clipboard_w32.cc)
	target_link_libraries(simutrans PRIVATE ws2_32 winmm)

	# Backup sound and music routines if the selected backend does not provide any routines
	set(BACKUP_SOUND src/simutrans/sound/win32_sound_xa.cc)
	set(BACKUP_MUSIC src/simutrans/music/w32_midi.cc)
else ()
	if (SIMUTRANS_BACKEND STREQUAL "sdl2")
		target_sources(simutrans PRIVATE src/simutrans/sys/clipboard_s2.cc)
	else ()
		target_sources(simutrans PRIVATE src/simutrans/sys/clipboard_internal.cc)
	endif ()
	if (APPLE)
		#Darwin kernel version is used to identify macOS version (16->10.12/Sierra)
		if (CMAKE_HOST_SYSTEM_VERSION VERSION_GREATER_EQUAL 16) #AVF
			set(BACKUP_SOUND src/simutrans/sound/AVF_core-audio_sound.mm)
			#AVF MIDI currently crash Simutrans
			#set(BACKUP_MUSIC src/simutrans/music/AVF_core-audio_midi.mm)
			set(BACKUP_MUSIC src/simutrans/music/no_midi.cc)
		else () #QTKit
			set(BACKUP_SOUND src/simutrans/sound/core-audio_sound.mm)
			set(BACKUP_MUSIC src/simutrans/music/core-audio_midi.mm)
		endif ()
	else ()
		set(BACKUP_SOUND src/simutrans/sound/no_sound.cc)
		set(BACKUP_MUSIC src/simutrans/music/no_midi.cc)
	endif ()
endif ()

if (SIMUTRANS_MULTI_THREAD)
	target_compile_definitions(simutrans PRIVATE MULTI_THREAD=1)
	target_link_libraries(simutrans PRIVATE Threads::Threads)
endif (SIMUTRANS_MULTI_THREAD)

if (SIMUTRANS_BACKEND STREQUAL "sdl2")
	target_sources(simutrans PRIVATE src/simutrans/display/simgraph16.cc src/simutrans/sys/simsys_s2.cc src/simutrans/sound/sdl2_sound.cc)
	target_include_directories(simutrans PRIVATE ${SDL2_INCLUDE_DIRS})
	if (MINGW)
		target_link_libraries(simutrans PRIVATE ${SDL2_STATIC_LIBRARIES})
	elseif (APPLE)
		target_link_libraries(simutrans PRIVATE ${SDL2_LIBRARIES})
	elseif (MSVC)
		target_link_libraries(simutrans PRIVATE $<TARGET_NAME_IF_EXISTS:SDL2::SDL2main> $<IF:$<TARGET_EXISTS:SDL2::SDL2>,SDL2::SDL2,SDL2::SDL2-static>)
	elseif (ANDROID)
		target_link_libraries(simutrans PRIVATE SDL2 SDL2main)
	else ()
		target_link_libraries(simutrans PRIVATE PkgConfig::SDL2)
	endif ()
	target_compile_definitions(simutrans PRIVATE COLOUR_DEPTH=16)

elseif (SIMUTRANS_BACKEND STREQUAL "gdi")
	target_sources(simutrans PRIVATE src/simutrans/display/simgraph16.cc src/simutrans/sys/simsys_w.cc ${BACKUP_SOUND} )
	target_link_libraries(simutrans PRIVATE imm32 xaudio2_8)
	target_compile_definitions(simutrans PRIVATE COLOUR_DEPTH=16)

else ()
	if (NOT SIMUTRANS_BACKEND STREQUAL "none")
		message(WARNING "Unknown backend '${SIMUTRANS_BACKEND}', falling back to headless compilation")
	endif ()

	target_sources(simutrans PRIVATE src/simutrans/display/simgraph0.cc src/simutrans/sys/simsys_posix.cc src/simutrans/sound/no_sound.cc src/simutrans/music/no_midi.cc)
	target_compile_definitions(simutrans PRIVATE COLOUR_DEPTH=0)
endif ()


#
# Link dependencies
#
target_link_libraries(simutrans PRIVATE ZLIB::ZLIB)
target_link_libraries(simutrans PRIVATE BZip2::BZip2)

# Freetype is mandatory for graphical builds
if (SIMUTRANS_BACKEND STREQUAL "sdl2" OR SIMUTRANS_BACKEND STREQUAL "gdi")
	target_include_directories(simutrans PRIVATE ${Freetype_INCLUDE_DIRS})
	if (MINGW)
		target_link_libraries(simutrans PRIVATE ${Freetype_STATIC_LIBRARIES})
	elseif (APPLE)
		target_link_libraries(simutrans PRIVATE ${Freetype_LIBRARIES})
	elseif (MSVC OR ANDROID)
		target_link_libraries(simutrans PRIVATE Freetype::Freetype)
	else ()
		target_link_libraries(simutrans PRIVATE PkgConfig::Freetype)
	endif ()
	if (SIMUTRANS_USE_FONTCONFIG)
		target_compile_definitions(simutrans PRIVATE USE_FONTCONFIG=1)
		target_link_libraries(simutrans PRIVATE Fontconfig::Fontconfig)
	endif ()
endif ()

if (SIMUTRANS_USE_UPNP)
	target_compile_definitions(simutrans PRIVATE USE_UPNP=1)
	target_link_libraries(simutrans PRIVATE MiniUPNP::MiniUPNP)
endif (SIMUTRANS_USE_UPNP)

if (SIMUTRANS_USE_ZSTD)
	target_sources(simutrans PRIVATE src/simutrans/io/rdwr/zstd_file_rdwr_stream.cc)
	target_include_directories(simutrans PRIVATE ${ZSTD_INCLUDE_DIRS})
	target_compile_definitions(simutrans PRIVATE USE_ZSTD=1)
	if (MSVC)
		target_link_libraries(simutrans PRIVATE $<IF:$<TARGET_EXISTS:zstd::libzstd_shared>,zstd::libzstd_shared,zstd::libzstd_static>)
	elseif (MINGW)
		# only 64 bit cmake, 32 bit is broken
		target_link_libraries(simutrans PRIVATE -lzstd)
	elseif (ANDROID)
		target_link_libraries(simutrans PRIVATE ZSTD::ZSTD)
	else()
		target_link_libraries(simutrans PRIVATE PkgConfig::ZSTD)
	endif ()
endif (SIMUTRANS_USE_ZSTD)

# only consider FluidSynth for SDL2 and GDI backends
if ((SIMUTRANS_BACKEND STREQUAL "sdl2") OR (SIMUTRANS_BACKEND STREQUAL "gdi"))
	if (SIMUTRANS_USE_FLUIDSYNTH_MIDI)
		target_sources(simutrans PRIVATE src/simutrans/music/fluidsynth.cc src/simutrans/gui/loadsoundfont_frame.cc)
		target_compile_definitions(simutrans PRIVATE USE_FLUIDSYNTH_MIDI=1)
		if (MINGW)
			# since fluidsynth 2.2.2 fluidsynth.pc include static libraries, but some are still missing
			target_link_libraries(simutrans PRIVATE ${FluidSynth_STATIC_LIBRARIES} -liconv -lgomp)
		elseif (MSVC)
			target_link_libraries(simutrans PRIVATE FluidSynth::libfluidsynth)
		elseif (ANDROID)
			target_link_libraries(simutrans PRIVATE fluidsynth)
		else ()
			target_link_libraries(simutrans PRIVATE PkgConfig::FluidSynth)
		endif (MINGW)
	else ()
		target_sources( simutrans PRIVATE ${BACKUP_MUSIC} )
	endif (SIMUTRANS_USE_FLUIDSYNTH_MIDI)
endif ((SIMUTRANS_BACKEND STREQUAL "sdl2") OR (SIMUTRANS_BACKEND STREQUAL "gdi"))

if (SIMUTRANS_STEAM_BUILT AND NOT ANDROID)
	target_compile_definitions(simutrans PRIVATE STEAM_BUILT=1)
	target_sources(simutrans PRIVATE src/steam/steam.cc src/steam/workshop_item.cc src/steam/achievements.cc )
	add_library(steam SHARED IMPORTED)
	if(APPLE)
		set_target_properties(steam PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/sdk/redistributable_bin/osx/libsteam_api.dylib)
	elseif(UNIX)
		set_target_properties(steam PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/sdk/redistributable_bin/linux64/libsteam_api.so)
	elseif(MSVC AND CMAKE_GENERATOR_PLATFORM MATCHES "x64")
		set_target_properties(steam PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/sdk/redistributable_bin/win64/steam_api64.dll)
		set_target_properties(steam PROPERTIES IMPORTED_IMPLIB ${CMAKE_SOURCE_DIR}/sdk/redistributable_bin/win64/steam_api64.lib)
	else(MSVC AND CMAKE_GENERATOR_PLATFORM MATCHES "Win32")
		set_target_properties(steam PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/sdk/redistributable_bin/steam_api.dll)
		set_target_properties(steam PROPERTIES IMPORTED_IMPLIB ${CMAKE_SOURCE_DIR}/sdk/redistributable_bin/steam_api.lib)
	endif()
	target_include_directories(simutrans PRIVATE ${CMAKE_SOURCE_DIR}/sdk/public/steam)
	target_link_libraries(simutrans PRIVATE steam)
endif ()

#
# compile options
#
if (MSVC)
	target_link_options(simutrans PRIVATE /INCREMENTAL:NO /NODEFAULTLIB:LIBCMTD /MANIFEST:NO /LARGEADDRESSAWARE)
endif ()

if (SIMUTRANS_BIG_ENDIAN)
	target_compile_definitions(simutrans PRIVATE SIM_BIG_ENDIAN=1)
endif ()

if (SIMUTRANS_VALGRIND_SUPPORT)
	add_definitions(-DUSE_VALGRIND_MEMCHECK=1)
endif ()

if (SIMUTRANS_ENABLE_PROFILING)
	add_definitions(-DPROFILE=1)
endif ()

target_compile_options(simutrans PRIVATE ${SIMUTRANS_COMMON_COMPILE_OPTIONS})

target_compile_definitions(simutrans PRIVATE $<IF:$<CONFIG:Debug>,DEBUG=1,>)
target_compile_definitions(simutrans PRIVATE $<IF:$<CONFIG:Release>,NDEBUG=1,>)

target_compile_definitions(simutrans PRIVATE MSG_LEVEL=${SIMUTRANS_MSG_LEVEL})

if (SIMUTRANS_AUTOJOIN_PUBLIC)
	target_compile_definitions(simutrans PRIVATE AUTOJOIN_PUBLIC=1)
endif ()

if (SIMUTRANS_ENABLE_WATERWAY_SIGNS)
	target_compile_definitions(simutrans PRIVATE ENABLE_WATERWAY_SIGNS=1)
endif ()

if (SIMUTRANS_USE_SYSLOG)
	target_compile_definitions(simutrans PRIVATE SYSLOG=1)
endif ()

if (SIMUTRANS_DEBUG_FLUSH_BUFFER)
	target_compile_definitions(simutrans PRIVATE DEBUG_FLUSH_BUFFER=1)
endif ()

if (SIMUTRANS_USE_IP4_ONLY)
	target_compile_definitions(simutrans PRIVATE USE_IP4_ONLY=1)
endif ()

if (SIMUTRANS_USE_OWN_PAKINSTALL)
	target_compile_definitions(simutrans PRIVATE USE_OWN_PAKINSTALL=1)
endif ()

if (APPLE)
	target_compile_definitions(simutrans PRIVATE ALT_SDL_DIR=1)
endif (APPLE)

#
# Package
#
if (APPLE)
	set(SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
	include(MacBundle)
endif ()


#
# Tests
#
add_custom_target(test
	$<TARGET_FILE:simutrans>
		-set_workdir ${CMAKE_CURRENT_SOURCE_DIR}/simutrans
		-objects pak
		-scenario automated-tests
		-debug 2
		-lang en
		-fps 100
	DEPENDS simutrans
)


#
# Installation
#
include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/SimutransInstall.cmake)

#
# Nettool/Makeobj
#
if (NOT ANDROID)
	add_subdirectory(src/makeobj EXCLUDE_FROM_ALL)
	add_subdirectory(src/nettool EXCLUDE_FROM_ALL)
endif ()