cmake_minimum_required(VERSION 3.10.0)
project(ai-box VERSION 0.1.0 LANGUAGES C CXX)
set(CMAKE_CXX_STANDARD 17)

if (POLICY CMP0091)
cmake_policy(SET CMP0091 NEW)
endif (POLICY CMP0091)

if(NOT DEFINED CMAKE_BUILD_TYPE)
	set(CMAKE_BUILD_TYPE Release)
endif()

set(NODE_COMMON_SOURCES)
set(NODE_ADDON_FOUND OFF)

include_directories(cxx)

# NodeJS
execute_process(
	COMMAND node ${CMAKE_SOURCE_DIR}/thirdpart/cmake-js-util.js --include
	RESULT_VARIABLE CMAKE_JS_RESULT
	OUTPUT_VARIABLE CMAKE_JS_INC
	OUTPUT_STRIP_TRAILING_WHITESPACE
)
if(CMAKE_JS_RESULT EQUAL 0)
	execute_process(
		COMMAND node ${CMAKE_SOURCE_DIR}/thirdpart/cmake-js-util.js --src
		RESULT_VARIABLE CMAKE_JS_RESULT
		OUTPUT_VARIABLE CMAKE_JS_SRC
		OUTPUT_STRIP_TRAILING_WHITESPACE
	)
	if(CMAKE_JS_RESULT EQUAL 0)
		execute_process(
			COMMAND node ${CMAKE_SOURCE_DIR}/thirdpart/cmake-js-util.js --lib
			RESULT_VARIABLE CMAKE_JS_RESULT
			OUTPUT_VARIABLE CMAKE_JS_LIB
			OUTPUT_STRIP_TRAILING_WHITESPACE
		)
	endif()
	# ReleaseVersion
	if(CMAKE_JS_RESULT EQUAL 0)
		execute_process(
			COMMAND node ${CMAKE_SOURCE_DIR}/thirdpart/cmake-js-util.js --release
			RESULT_VARIABLE CMAKE_JS_RESULT
			OUTPUT_VARIABLE RELEASE_VERSION
			OUTPUT_STRIP_TRAILING_WHITESPACE
		)
		if(CMAKE_JS_RESULT EQUAL 0)
			message(STATUS "RELEASE_VERSION: ${RELEASE_VERSION}")
			add_compile_definitions(RELEASE_VERSION="${RELEASE_VERSION}")
		endif()
	endif()

	# NAPI
	if(CMAKE_JS_RESULT EQUAL 0)
		execute_process(
			COMMAND node ${CMAKE_SOURCE_DIR}/thirdpart/cmake-js-util.js --napi
			RESULT_VARIABLE CMAKE_JS_RESULT
			OUTPUT_VARIABLE NODE_ADDON_API_DIR
		)
	endif()
	if(CMAKE_JS_RESULT EQUAL 0)
		message(STATUS "CMAKE_JS_INC: ${CMAKE_JS_INC}")
		message(STATUS "CMAKE_JS_SRC: ${CMAKE_JS_SRC}")
		message(STATUS "CMAKE_JS_LIB: ${CMAKE_JS_LIB}")
		message(STATUS "NODE_ADDON_API_DIR: ${NODE_ADDON_API_DIR}")
		include_directories(${CMAKE_JS_INC} ${NODE_ADDON_API_DIR})
		set(NODE_ADDON_FOUND ON)
	endif()
endif()
if(NOT (CMAKE_JS_RESULT EQUAL 0))
	message(FATAL_ERROR "cmake js config failed")
endif()


# OpenCV
set(OpenCV_CMAKE_FILE ${CMAKE_SOURCE_DIR}/thirdpart/OpenCV/${CMAKE_BUILD_TYPE}/config.cmake)
if(EXISTS ${OpenCV_CMAKE_FILE})
	include(${OpenCV_CMAKE_FILE})
	message(STATUS "OpenCV_LIB_DIR: ${OpenCV_LIB_DIR}")
	message(STATUS "OpenCV_INCLUDE_DIR: ${OpenCV_INCLUDE_DIR}")
	message(STATUS "OpenCV_LIBS: ${OpenCV_LIBS}")
	include_directories(${OpenCV_INCLUDE_DIRS})
	link_directories(${OpenCV_LIB_DIR})
else()
	message(FATAL_ERROR "OpenCV config failed")
endif()

# 构建目标
add_library(cv SHARED ${CMAKE_JS_SRC}
	cxx/node.cc
	cxx/mat.cc
	cxx/videocap.cc
	cxx/util.cc
)
target_link_libraries(cv ${CMAKE_JS_LIB} ${OpenCV_LIBS})
set_target_properties(cv PROPERTIES PREFIX "" SUFFIX ".node")


if(MSVC AND NODE_ADDON_FOUND)
  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MT")
  execute_process(COMMAND ${CMAKE_AR} /def:${CMAKE_JS_NODELIB_DEF} /out:${CMAKE_JS_NODELIB_TARGET} ${CMAKE_STATIC_LINKER_FLAGS})
endif()