find_package(PkgConfig)
include(ExternalProject)
include(CMakeDependentOption)

# Defines the ARCHITECTURE variable
include(DetectArchitecture)

# Warnings are silenced for 3rdparty code
if(NOT MSVC)
	add_compile_options("$<$<COMPILE_LANGUAGE:CXX,C>:-w>")
endif()

add_subdirectory(crypto)

if(NOT xbyak_FOUND)
    add_subdirectory(xbyak)
endif()

add_subdirectory(SPIRV-Headers)
add_subdirectory(SPIRV-Tools)
add_subdirectory(Vulkan-Headers)

option(SPIRV_CROSS_SHARED "" off)
option(SPIRV_CROSS_STATIC "" on)
option(SPIRV_CROSS_ENABLE_GLSL "" on)
option(SPIRV_CROSS_ENABLE_HLSL "" off)
option(SPIRV_CROSS_ENABLE_MSL "" off)
option(SPIRV_CROSS_ENABLE_CPP "" off)
option(SPIRV_CROSS_ENABLE_REFLECT "" off)
option(SPIRV_CROSS_ENABLE_C_API "" off)
option(SPIRV_CROSS_ENABLE_UTIL "" off)
option(SPIRV_CROSS_CLI "" off)
option(SPIRV_CROSS_ENABLE_TESTS "" off)
option(SPIRV_CROSS_SKIP_INSTALL "" on)
add_subdirectory(SPIRV-Cross)

add_subdirectory(glslang)
if(NOT TARGET glslang::glslang-standalone AND TARGET glslang-standalone)
    add_executable(glslang::glslang-standalone ALIAS glslang-standalone)
endif()

add_library(3rdparty_json INTERFACE)

if(NOT nlohmann_json_FOUND)
    add_subdirectory(json)
endif()

target_link_libraries(3rdparty_json INTERFACE nlohmann_json)

add_subdirectory(LibAtrac9)

if (COMPILE_FFMPEG)
	set(FFMPEG_PATH ${CMAKE_CURRENT_SOURCE_DIR}/FFmpeg) 
	add_custom_command(
		OUTPUT ${FFMPEG_PATH}/config.h
		COMMAND ./configure --disable-libdrm --disable-vaapi --disable-vdpau --disable-zlib --disable-lzma
		COMMENT "Configuring FFmpeg..."
		WORKING_DIRECTORY ${FFMPEG_PATH}
	)
	add_custom_target(ffmpeg-configure DEPENDS ${FFMPEG_PATH}/config.h)

	function(import_ffmpeg_library name)
		if (${CMAKE_GENERATOR} STREQUAL "Unix Makefiles")
			set(MAKE_COMMAND $(MAKE) -j$(nproc))
		elseif (${CMAKE_GENERATOR} STREQUAL "Ninja")
			set(MAKE_COMMAND make -j$$(nproc))
		else()
			set(MAKE_COMMAND make)
		endif()

		add_custom_command(
			OUTPUT "${FFMPEG_PATH}/lib${name}/lib${name}.a"
			COMMAND ${MAKE_COMMAND} -C ${FFMPEG_PATH} "lib${name}/lib${name}.a"
			COMMENT "Building lib${name}/lib${name}.a"
			DEPENDS ffmpeg-configure
			WORKING_DIRECTORY ${FFMPEG_PATH}
		)

		add_custom_target(ffmpeg-build-${name} DEPENDS "${FFMPEG_PATH}/lib${name}/lib${name}.a")

		add_library(ffmpeg::${name} STATIC IMPORTED GLOBAL)
		set_property(TARGET ffmpeg::${name} PROPERTY IMPORTED_LOCATION "${FFMPEG_PATH}/lib${name}/lib${name}.a")
		set_property(TARGET ffmpeg::${name} PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${FFMPEG_PATH}")
		add_dependencies(ffmpeg::${name} ffmpeg-build-${name})
	endfunction()

	import_ffmpeg_library(avcodec)
	import_ffmpeg_library(avformat)
	import_ffmpeg_library(avfilter)
	import_ffmpeg_library(avdevice)
	import_ffmpeg_library(avutil)
	import_ffmpeg_library(swscale)
	import_ffmpeg_library(swresample)
	import_ffmpeg_library(postproc)
endif()

# Dummy target to use when lib isn't available
add_library(3rdparty_dummy_lib INTERFACE)


# ZLib
add_subdirectory(zlib EXCLUDE_FROM_ALL)

# ZSTD
add_subdirectory(zstd EXCLUDE_FROM_ALL)

# workaround for LLVM
add_library(zstd::libzstd_static ALIAS libzstd_static)

# 7zip sdk
add_subdirectory(7zip EXCLUDE_FROM_ALL)

add_library(3rdparty_flatbuffers INTERFACE)
if (USE_SYSTEM_FLATBUFFERS)
	pkg_check_modules(FLATBUFFERS REQUIRED IMPORTED_TARGET flatbuffers>=2.0.0)
	target_link_libraries(3rdparty_flatbuffers INTERFACE PkgConfig::FLATBUFFERS)
	set(FBS_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../rpcs3/Emu/NP/generated/")
	execute_process(COMMAND flatc --cpp -o "${FBS_DIR}" "${FBS_DIR}/np2_structs.fbs" RESULT_VARIABLE FBS_CMD_ERROR)
	if(FBS_CMD_ERROR AND NOT FBS_CMD_ERROR EQUAL 0)
		message(FATAL_ERROR "flatc failed to regenerate flatbuffers headers.")
	endif()
else()
	target_include_directories(3rdparty_flatbuffers INTERFACE flatbuffers/include)
endif()

# libPNG
add_subdirectory(libpng EXCLUDE_FROM_ALL)


# pugixml
if (USE_SYSTEM_PUGIXML)
	pkg_check_modules(PUGIXML REQUIRED IMPORTED_TARGET pugixml>=1.15)
	add_library(pugixml INTERFACE)
	target_link_libraries(pugixml INTERFACE PkgConfig::PUGIXML)
else()
	add_subdirectory(pugixml EXCLUDE_FROM_ALL)
endif()


# libusb
if(CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD")
	pkg_check_modules(LIBUSB REQUIRED IMPORTED_TARGET libusb-1.0>=1.0 )
	cmake_dependent_option(USE_SYSTEM_LIBUSB "Use system libusb-1.0 as shared library" ON
			"LIBUSB_FOUND" OFF)
else()
	pkg_check_modules(LIBUSB IMPORTED_TARGET libusb-1.0>=1.0 )
	cmake_dependent_option(USE_SYSTEM_LIBUSB "Use system libusb-1.0 as shared library" OFF
			"LIBUSB_FOUND" OFF)
endif()
if(CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD")
	# Always use system libusb as reference implementation isn't supported
	add_library(usb-1.0-shared INTERFACE)
	target_link_libraries(usb-1.0-shared INTERFACE PkgConfig::LIBUSB)
elseif(MSVC)
	# Windows time.h defines timespec but doesn't add any flag for it, which makes libusb attempt to define it again
	add_definitions(-DHAVE_STRUCT_TIMESPEC=1)
	add_subdirectory(libusb EXCLUDE_FROM_ALL)
else()
	if(USE_SYSTEM_LIBUSB)
		# we have the system libusb and have selected to use it
		add_library(usb-1.0-shared INTERFACE)
		target_link_libraries(usb-1.0-shared INTERFACE PkgConfig::LIBUSB)
	else()
		# we don't have the system libusb, so we compile from submodule
		unset(LIBUSB_LIBRARIES CACHE)
		add_subdirectory(libusb EXCLUDE_FROM_ALL)

		if (NOT TARGET usb-1.0 AND TARGET usb-1.0-static)
			add_library(usb-1.0 ALIAS usb-1.0-static)
		endif()
	endif()
endif()


# hidapi
add_subdirectory(hidapi)

# glslang
add_library(3rdparty_glslang INTERFACE)
target_link_libraries(3rdparty_glslang INTERFACE SPIRV)


# yaml-cpp
add_subdirectory(yaml-cpp)


# OpenGL

if (NOT ANDROID AND NOT WITHOUT_OPENGL)
	find_package(OpenGL REQUIRED OPTIONAL_COMPONENTS EGL)

	add_library(3rdparty_opengl INTERFACE)
	target_include_directories(3rdparty_opengl INTERFACE GL)

	if (WIN32)
		if(NOT MSVC)
			target_link_libraries(3rdparty_opengl INTERFACE OpenGL::GL OpenGL::GLU)
		else()
			target_link_libraries(3rdparty_opengl INTERFACE dxgi.lib d2d1.lib dwrite.lib)
		endif()
	elseif(APPLE)
		target_link_libraries(3rdparty_opengl INTERFACE OpenGL::GL OpenGL::GLU)
	else()
		target_link_libraries(3rdparty_opengl INTERFACE OpenGL::GL OpenGL::GLU OpenGL::GLX)
	endif()
else()
	add_library(3rdparty_opengl INTERFACE)
	target_compile_definitions(3rdparty_opengl INTERFACE WITHOUT_OPENGL=1)
endif()

# stblib
add_subdirectory(stblib)

# Cubeb
add_subdirectory(cubeb EXCLUDE_FROM_ALL)

# SoundTouch
add_subdirectory(SoundTouch EXCLUDE_FROM_ALL)

# libevdev
set(LIBEVDEV_TARGET 3rdparty_dummy_lib)
if(USE_LIBEVDEV)
	pkg_check_modules(LIBEVDEV libevdev libudev)
	if(LIBEVDEV_FOUND)
		add_library(3rdparty_libevdev INTERFACE)
		target_compile_definitions(3rdparty_libevdev INTERFACE -DHAVE_LIBEVDEV)
		target_include_directories(3rdparty_libevdev SYSTEM
			INTERFACE ${LIBEVDEV_INCLUDE_DIRS})
		target_link_libraries(3rdparty_libevdev INTERFACE ${LIBEVDEV_LDFLAGS})

		set(LIBEVDEV_TARGET 3rdparty_libevdev)
	endif()
endif()


# Vulkan
set(VULKAN_TARGET 3rdparty_dummy_lib)
if(APPLE)
	if(USE_SYSTEM_MVK)
		message(STATUS "Using system MoltenVK")
	else()
		message(STATUS "MoltenVK submodule")

		execute_process(COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" .
			WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK"
		)
		execute_process(COMMAND "${CMAKE_COMMAND}" --build .
			WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK"
		)

		add_library(moltenvk_lib SHARED IMPORTED)
		add_dependencies(moltenvk_lib moltenvk)
		set_target_properties(moltenvk_lib
			PROPERTIES IMPORTED_LOCATION "{Vulkan_LIBRARY}"
		)

		set(VULKAN_SDK "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/MoltenVK/MoltenVK")
		set(VK_ICD_FILENAMES "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/MoltenVK/MoltenVK/icd/MoltenVK_icd.json")
		set(Vulkan_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/MoltenVK/MoltenVK/include")
		set(Vulkan_LIBRARY "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/MoltenVK/Build/Products/Release/dynamic/libMoltenVK.dylib")
		set(Vulkan_TOOLS "${CMAKE_CURRENT_SOURCE_DIR}/MoltenVK/MoltenVK/Build/Products/Release")
	endif()
endif()

add_library(3rdparty_vulkan INTERFACE)
target_compile_definitions(3rdparty_vulkan INTERFACE -DHAVE_VULKAN)

if (NOT COMPILE_VULKAN_LOADER OR ANDROID OR APPLE)
	find_package(Vulkan 1.3 GLOBAL)

	if (Vulkan_FOUND)
		message(STATUS "Using system Vulkan Loader")
		target_link_libraries(3rdparty_vulkan INTERFACE Vulkan::Vulkan)
		add_library(Vulkan::Loader ALIAS Vulkan::Vulkan)
	else()
		message(WARNING "Vulkan not found, using submodule")
		set(COMPILE_VULKAN_LOADER on)
	endif()
endif()

if (COMPILE_VULKAN_LOADER)
	add_subdirectory(Vulkan-Loader)
	target_link_libraries(3rdparty_vulkan INTERFACE Vulkan::Loader)
endif()

if(UNIX AND NOT APPLE AND NOT ANDROID)
	find_package(Wayland)

	if (WAYLAND_FOUND)
		target_include_directories(3rdparty_vulkan
			INTERFACE ${WAYLAND_INCLUDE_DIR})

		target_compile_definitions(3rdparty_vulkan
			INTERFACE -DVK_USE_PLATFORM_WAYLAND_KHR)
	endif()
endif()

set(VULKAN_TARGET 3rdparty_vulkan)

# AsmJit
add_subdirectory(asmjit EXCLUDE_FROM_ALL)

# OpenAL
if (NOT ANDROID AND NOT WITHOUT_OPENAL)
	add_subdirectory(OpenAL EXCLUDE_FROM_ALL)
else()
	add_library(3rdparty_openal INTERFACE)
	target_compile_definitions(3rdparty_openal INTERFACE WITHOUT_OPENAL=1)
endif()

# FAudio
set(FAUDIO_TARGET 3rdparty_dummy_lib)
if(USE_FAUDIO)
	# FAudio depends on SDL3
	find_package(SDL3)
	if (USE_SYSTEM_FAUDIO)
		if (NOT SDL3_FOUND OR SDL3_VERSION VERSION_LESS 3.2.0)
			message(WARNING
				"System FAudio requires SDL 3.2.0 or newer. Since a valid SDL3"
				">=3.2.0 version cannot be found, building with FAudio will be skipped.")
			set(USE_FAUDIO OFF CACHE BOOL "Disabled using system FAudio with SDL < 3.2.0" FORCE)
		else()
			message(STATUS "Using system FAudio")
			find_package(FAudio REQUIRED CONFIGS FAudioConfig.cmake FAudio-config.cmake)
			add_library(3rdparty_FAudio INTERFACE)
			target_link_libraries(3rdparty_FAudio INTERFACE FAudio)
			target_compile_definitions(3rdparty_FAudio INTERFACE -DHAVE_FAUDIO)
			set(FAUDIO_TARGET 3rdparty_FAudio)
		endif()
	else()
		if (NOT SDL3_FOUND OR SDL3_VERSION VERSION_LESS 3.2.0)
			message(WARNING
				"-- 3rdparty FAudio requires SDL 3.2.0 or newer. Since a valid SDL3"
				">=3.2.0 version cannot be found, building with FAudio will be skipped.")
			set(USE_FAUDIO OFF CACHE BOOL "Disabled FAudio with SDL < 3.2.0" FORCE)
		else()
			message(STATUS "Using builtin FAudio")
			set(BUILD_SHARED_LIBS OFF CACHE BOOL "Build shared library")
			add_subdirectory(FAudio EXCLUDE_FROM_ALL)
			target_compile_definitions(FAudio-static INTERFACE -DHAVE_FAUDIO)
			set(FAUDIO_TARGET FAudio-static)
		endif()
	endif()
endif()

set_property(TARGET ${FAUDIO_TARGET} PROPERTY FOLDER "3rdparty/")


# GLEW
add_library(3rdparty_glew INTERFACE)
if(NOT MSVC AND NOT ANDROID AND NOT WITHOUT_OPENGLEW)
	find_package(GLEW REQUIRED)
	target_link_libraries(3rdparty_glew INTERFACE GLEW::GLEW)
endif()

# WOLFSSL
add_subdirectory(wolfssl EXCLUDE_FROM_ALL)

# CURL
add_subdirectory(curl EXCLUDE_FROM_ALL)

# SDL3
set(SDL3_TARGET 3rdparty_dummy_lib)
if(USE_SDL)
	if(USE_SYSTEM_SDL)
		find_package(SDL3)
		if(SDL3_FOUND AND NOT SDL3_VERSION VERSION_LESS 3.2.0)
			message(STATUS "Using system SDL3 version '${SDL3_VERSION}'")
			add_library(3rdparty_sdl3 INTERFACE)
			target_compile_definitions(3rdparty_sdl3 INTERFACE -DHAVE_SDL3=1)
			target_link_libraries(3rdparty_sdl3 INTERFACE SDL3::SDL3)
			set(SDL3_TARGET 3rdparty_sdl3)
		else()
			message(FATAL_ERROR "SDL3 is not available on this system")
		endif()
	else()
		message(STATUS "Using static SDL3 from 3rdparty")
		add_library(3rdparty_sdl3 INTERFACE)
		target_compile_definitions(3rdparty_sdl3 INTERFACE -DHAVE_SDL3=1)
		add_subdirectory(libsdl-org EXCLUDE_FROM_ALL)
		set(SDL3_TARGET 3rdparty_sdl3)
	endif()
endif()

# MINIUPNP
add_subdirectory(miniupnp EXCLUDE_FROM_ALL)

# RTMIDI
if(NOT ANDROID)
	add_subdirectory(rtmidi EXCLUDE_FROM_ALL)
else()
	add_library(rtmidi INTERFACE)
	target_compile_definitions(rtmidi INTERFACE WITHOUT_RTMIDI)
endif()

# OPENCV
add_subdirectory(opencv EXCLUDE_FROM_ALL)

# FUSION
add_subdirectory(fusion EXCLUDE_FROM_ALL)


# add nice ALIAS targets for ease of use
if(USE_SYSTEM_LIBUSB)
	add_library(3rdparty::libusb ALIAS usb-1.0-shared)
else()
	add_library(3rdparty::libusb ALIAS usb-1.0-static)
endif()

if (ANDROID)
	add_library(glfw INTERFACE)
	target_compile_definitions(glfw INTERFACE WITHOUT_GLFW)
	add_library(3rdparty::glfw ALIAS glfw)
else()
	if (NOT COMPILE_GLFW)
		find_package(glfw3 3.3 GLOBAL)
		if (glfw3_FOUND)
			message(STATUS "Using system glfw")
		else()
			message(WARNING "glfw not found, using submodule")
			set(COMPILE_GLFW on)
		endif()
	endif()

	if (COMPILE_GLFW)
		set(GLFW_BUILD_DOCS off)
		set(GLFW_INSTALL off)

		if (WIN32)
			set(GLFW_BUILD_WIN32 on)
		elseif(LINUX)
			set(GLFW_BUILD_WAYLAND on)
			set(GLFW_BUILD_X11 on)
		endif()

		add_subdirectory(glfw)
	endif()

	if (NOT TARGET glfw)
		message(FATAL_ERROR "where is glfw?")
	endif()


	add_library(3rdparty::glfw ALIAS glfw)
endif()


add_library(3rdparty::zlib ALIAS 3rdparty_zlib)
add_library(3rdparty::zstd ALIAS 3rdparty_zstd)
add_library(3rdparty::7zip ALIAS 3rdparty_7zip)
add_library(3rdparty::flatbuffers ALIAS 3rdparty_flatbuffers)
add_library(3rdparty::pugixml ALIAS pugixml)
add_library(3rdparty::glslang ALIAS 3rdparty_glslang)
add_library(3rdparty::yaml-cpp ALIAS yaml-cpp)
add_library(3rdparty::hidapi ALIAS 3rdparty_hidapi)
add_library(3rdparty::libpng ALIAS ${LIBPNG_TARGET})
add_library(3rdparty::opengl ALIAS 3rdparty_opengl)
add_library(3rdparty::stblib ALIAS 3rdparty_stblib)
add_library(3rdparty::faudio ALIAS ${FAUDIO_TARGET})
add_library(3rdparty::libevdev ALIAS ${LIBEVDEV_TARGET})
add_library(3rdparty::vulkan ALIAS ${VULKAN_TARGET})
add_library(3rdparty::openal ALIAS 3rdparty_openal)
add_library(3rdparty::glew ALIAS 3rdparty_glew)
add_library(3rdparty::wolfssl ALIAS wolfssl)
add_library(3rdparty::libcurl ALIAS 3rdparty_libcurl)
add_library(3rdparty::soundtouch ALIAS soundtouch)
add_library(3rdparty::sdl3 ALIAS ${SDL3_TARGET})
add_library(3rdparty::miniupnpc ALIAS libminiupnpc-static)
add_library(3rdparty::rtmidi ALIAS rtmidi)
add_library(3rdparty::opencv ALIAS ${OPENCV_TARGET})
add_library(3rdparty::fusion ALIAS Fusion)
add_library(3rdparty::json ALIAS 3rdparty_json)