find_package(Python COMPONENTS Interpreter)

set(bsp_manifest ${CMAKE_CURRENT_BINARY_DIR}/bsp-manifest.json)
set(bsp_tool ${CMAKE_SOURCE_DIR}/util/bsp-tool.py)

function(bsp_reset)
	execute_process(
		COMMAND ${Python_EXECUTABLE} ${bsp_tool} reset ${bsp_manifest}
		COMMAND_ERROR_IS_FATAL ANY)
endfunction(bsp_reset)

function(bsp_add_library)
	set(options)
	set(one_value_args NAME HEADER_DIR LIB_DIR)
	set(multi_value_args)

	cmake_parse_arguments(PARSE_ARGV 0 arg
		"${options}"
		"${one_value_args}"
		"${multi_value_args}")

	set(target_name ${arg_NAME})
	set(bsp_target_name _bsp-${target_name})
	meta_target_get_header_directories(TARGET ${target_name} OUT header_dirs)

	get_property(bsp_targets GLOBAL PROPERTY bsp_target_list)
	list(LENGTH bsp_targets nr_bsp_targets)
	if (${nr_bsp_targets} GREATER 0)
		math(EXPR serialiser_index "${nr_bsp_targets}-1")
		list(GET bsp_targets ${serialiser_index} serialiser)
	endif ()

	add_custom_target(${bsp_target_name}
		COMMAND	${Python_EXECUTABLE} ${bsp_tool}
			add-binary ${bsp_manifest} ${target_name}
			${arg_LIB_DIR} $<TARGET_FILE:${target_name}>
		COMMAND ${Python_EXECUTABLE} ${bsp_tool}
			add-headers ${bsp_manifest} ${target_name}
			${arg_HEADER_DIR} ${header_dirs}
		COMMENT "Preparing bsp component: ${target_name}"
		DEPENDS ${target_name} ${serialiser})

	set_property(GLOBAL PROPERTY bsp_target_list ${bsp_targets} ${bsp_target_name})
endfunction(bsp_add_library)

function(bsp_add_program)
	set(options)
	set(one_value_args NAME BIN_DIR)
	set(multi_value_args)

	cmake_parse_arguments(PARSE_ARGV 0 arg
		"${options}"
		"${one_value_args}"
		"${multi_value_args}")

	set(target_name ${arg_NAME})
	set(bsp_target_name _bsp-${target_name})

	get_property(bsp_targets GLOBAL PROPERTY bsp_target_list)
	list(LENGTH bsp_targets nr_bsp_targets)
	if (${nr_bsp_targets} GREATER 0)
		math(EXPR serialiser_index "${nr_bsp_targets}-1")
		list(GET bsp_targets ${serialiser_index} serialiser)
	endif ()

	add_custom_target(${bsp_target_name}
		COMMAND	${Python_EXECUTABLE} ${bsp_tool}
			add-binary ${bsp_manifest} ${target_name}
			${arg_BIN_DIR} $<TARGET_FILE:${target_name}>
		COMMENT "Preparing bsp component: ${target_name}"
		DEPENDS ${target_name} ${serialiser})

	set_property(GLOBAL PROPERTY bsp_target_list ${bsp_targets} ${bsp_target_name})
endfunction(bsp_add_program)

function(bsp_finalise)
	set(options)
	set(one_value_args BSP_NAME)
	set(multi_value_args)

	cmake_parse_arguments(PARSE_ARGV 0 arg
		"${options}"
		"${one_value_args}"
		"${multi_value_args}")

	set(bsp_output_path ${CMAKE_CURRENT_BINARY_DIR}/${arg_BSP_NAME})
	get_property(bsp_targets GLOBAL PROPERTY bsp_target_list)
	add_custom_command(OUTPUT ${bsp_output_path}
		COMMAND	${Python_EXECUTABLE} ${bsp_tool}
			build-bsp ${bsp_manifest} ${bsp_output_path}
		DEPENDS ${bsp_targets}
		COMMENT "Building bsp: ${arg_BSP_NAME}")
	add_custom_target(bsp
		DEPENDS ${bsp_output_path})
endfunction(bsp_finalise)