################################################################################
# CMake support for the EIVE OBSW
# 
# Author: R. Mueller
################################################################################

################################################################################
# Pre-Project preparation
################################################################################
cmake_minimum_required(VERSION 3.13)

# set(CMAKE_VERBOSE TRUE)

set(CMAKE_SCRIPT_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

if(TGT_BSP MATCHES "arm/q7s")
    option(EIVE_BUILD_WATCHDOG "Compile the OBSW watchdog insted" OFF)
    option(BUILD_Q7S_SIMPLE_MODE OFF "Simple mode with a minimal main function")
endif()

option(ADD_ETL_LIB "Add ETL library" ON)
option(ADD_JSON_LIB "Add JSON library" ON)
option(EIVE_SYSROOT_MAGIC "Perform sysroot magic which might not be necessary" OFF)

if(NOT FSFW_OSAL)
	set(FSFW_OSAL host CACHE STRING "OS for the FSFW.")
endif()

if(TGT_BSP MATCHES "arm/raspberrypi" OR TGT_BSP MATCHES "arm/beagleboneblack")
    option(LINUX_CROSS_COMPILE ON)
endif()

# Perform steps like loading toolchain files where applicable.
include(${CMAKE_SCRIPT_PATH}/PreProjectConfig.cmake)
pre_project_config()

set(PROJECT_NAME_TO_SET eive-obsw-$ENV{USERNAME})
if(EIVE_BUILD_WATCHDOG)
    set(PROJECT_NAME_TO_SET eive-watchdog)
endif()

# Project Name
project(${PROJECT_NAME_TO_SET} ASM C CXX)

################################################################################
# Pre-Sources preparation
################################################################################

# Specify the C++ standard
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED True)

# Set names and variables
set(TARGET_NAME ${CMAKE_PROJECT_NAME}) 
set(LIB_FSFW_NAME fsfw)
set(LIB_ETL_NAME etl)
set(LIB_CSP_NAME libcsp)
set(LIB_LWGPS_NAME lwgps)
set(LIB_ARCSEC wire)
set(THIRD_PARTY_FOLDER thirdparty)
set(LIB_CXX_FS -lstdc++fs)
set(LIB_JSON_NAME nlohmann_json::nlohmann_json)

# Set path names
set(FSFW_PATH fsfw)
set(MISSION_PATH mission)
set(TEST_PATH test/testtasks)
set(LINUX_PATH linux)
set(COMMON_PATH common)
set(WATCHDOG_PATH watchdog)
set(COMMON_CONFIG_PATH ${COMMON_PATH}/config)

set(FSFW_HAL_LIB_PATH fsfw_hal)
set(CSP_LIB_PATH ${THIRD_PARTY_FOLDER}/libcsp)
set(ETL_LIB_PATH ${THIRD_PARTY_FOLDER}/etl)
set(LWGPS_LIB_PATH ${THIRD_PARTY_FOLDER}/lwgps)
set(ARCSEC_LIB_PATH ${THIRD_PARTY_FOLDER}/arcsec_star_tracker)
set(LIB_JSON_PATH ${THIRD_PARTY_FOLDER}/json)

set(FSFW_WARNING_SHADOW_LOCAL_GCC OFF)
set(ADD_LINUX_FILES False)

# Analyse different OS and architecture/target options, determine BSP_PATH,
# display information about compiler etc.
include (${CMAKE_SCRIPT_PATH}/HardwareOsPreConfig.cmake)
pre_source_hw_os_config()

if(TGT_BSP)
    if(TGT_BSP MATCHES "arm/q7s" OR TGT_BSP MATCHES "arm/raspberrypi"
        OR TGT_BSP MATCHES "arm/beagleboneblack"
    )
        set(FSFW_CONFIG_PATH "linux/fsfwconfig")
        if(NOT BUILD_Q7S_SIMPLE_MODE)
            set(ADD_LINUX_FILES TRUE)
            set(ADD_CSP_LIB TRUE)
            set(FSFW_HAL_ADD_LINUX ON)
        endif()
    endif()
   
    if(${TGT_BSP} MATCHES "arm/raspberrypi")
        # Used by configure file
        set(RASPBERRY_PI ON)
        set(FSFW_HAL_ADD_RASPBERRY_PI ON)
    endif()
    
    if(${TGT_BSP} MATCHES "arm/beagleboneblack")
        # Used by configure file
        set(BEAGLEBONEBLACK ON)
    endif()
    
    if(${TGT_BSP} MATCHES "arm/q7s")
        # Used by configure file
        set(XIPHOS_Q7S ON)
    endif()
else()
    # Required by FSFW library
    set(FSFW_CONFIG_PATH "${BSP_PATH}/fsfwconfig")
endif()

# Configuration files
if(NOT EIVE_BUILD_WATCHDOG)
    configure_file(${COMMON_CONFIG_PATH}/commonConfig.h.in commonConfig.h)
    configure_file(${FSFW_CONFIG_PATH}/FSFWConfig.h.in FSFWConfig.h)
    configure_file(${FSFW_CONFIG_PATH}/OBSWConfig.h.in OBSWConfig.h)
    if(${TGT_BSP} MATCHES "arm/q7s")
        configure_file(${BSP_PATH}/boardconfig/q7sConfig.h.in q7sConfig.h)
    elseif(${TGT_BSP} MATCHES "arm/raspberrypi")
        configure_file(${BSP_PATH}/boardconfig/rpiConfig.h.in rpiConfig.h)
    endif()
endif()
configure_file(${WATCHDOG_PATH}/watchdogConf.h.in watchdogConf.h)

# Set common config path for FSFW
set(FSFW_ADDITIONAL_INC_PATHS 
    "${COMMON_PATH}/config"
    ${CMAKE_CURRENT_BINARY_DIR}
)
# Set for lwgps library
set(LWGPS_CONFIG_PATH "${COMMON_PATH}/config")

################################################################################
# Executable and Sources
################################################################################

# Add executable
add_executable(${TARGET_NAME})

if(ADD_ETL_LIB)
    add_subdirectory(${ETL_LIB_PATH})
endif()

if(ADD_JSON_LIB)
    add_subdirectory(${LIB_JSON_PATH})
endif()

if(NOT EIVE_BUILD_WATCHDOG)
    if(ADD_LINUX_FILES)
        add_subdirectory(${LINUX_PATH})
    endif()
    add_subdirectory(${BSP_PATH})
    add_subdirectory(${COMMON_PATH})
    if(ADD_CSP_LIB)
        add_subdirectory(${CSP_LIB_PATH})
    endif()
endif()

if((NOT BUILD_Q7S_SIMPLE_MODE) AND (NOT EIVE_BUILD_WATCHDOG))
    add_subdirectory(${LWGPS_LIB_PATH})
    add_subdirectory(${FSFW_PATH})
    add_subdirectory(${MISSION_PATH})
    add_subdirectory(${TEST_PATH})
    add_subdirectory(${ARCSEC_LIB_PATH})
endif()

if(EIVE_BUILD_WATCHDOG)
    add_subdirectory(${WATCHDOG_PATH})
endif()

################################################################################
# Post-Sources preparation
################################################################################

set_property(CACHE FSFW_OSAL PROPERTY STRINGS host linux)

if((NOT BUILD_Q7S_SIMPLE_MODE) AND (NOT EIVE_BUILD_WATCHDOG))
    # Add libraries for all sources.
    target_link_libraries(${TARGET_NAME} PRIVATE
        ${LIB_FSFW_NAME}
        ${LIB_OS_NAME}
        ${LIB_LWGPS_NAME}
    )

    if(TGT_BSP MATCHES "arm/q7s")
        target_link_libraries(${TARGET_NAME} PRIVATE
            ${LIB_ARCSEC}
        )
    endif()
endif()

if(NOT EIVE_BUILD_WATCHDOG)
    if(ADD_CSP_LIB)
        target_link_libraries(${TARGET_NAME} PRIVATE
            ${LIB_CSP_NAME}
        )
    endif()
endif()

if(ADD_ETL_LIB)
    target_link_libraries(${TARGET_NAME} PRIVATE
        ${LIB_ETL_NAME}
    )
endif()

if(ADD_JSON_LIB)
    target_link_libraries(${TARGET_NAME} PRIVATE
        ${LIB_JSON_NAME}
    )
endif()

target_link_libraries(${TARGET_NAME} PRIVATE
    ${LIB_CXX_FS}
)

# Add include paths for all sources.
target_include_directories(${TARGET_NAME} PRIVATE
	${CMAKE_CURRENT_SOURCE_DIR}
	${FSFW_CONFIG_PATH}
	${CMAKE_CURRENT_BINARY_DIR}
	${ARCSEC_LIB_PATH}
)	

if(TGT_BSP MATCHES "arm/q7s")
    target_include_directories(${TARGET_NAME} PRIVATE
        ${ARCSEC_LIB_PATH}
    )
endif()

if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
	set(WARNING_FLAGS
		-Wall
		-Wextra
		-Wimplicit-fallthrough=1
		-Wno-unused-parameter
		-Wno-psabi
	)
	
	# Remove unused sections.
	target_compile_options(${TARGET_NAME} PRIVATE
		"-ffunction-sections"
		"-fdata-sections"
	)

	# Removed unused sections.
	target_link_options(${TARGET_NAME} PRIVATE
		"-Wl,--gc-sections"
	)
	
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
	set(COMPILER_FLAGS "/permissive-")
endif()

if(CMAKE_VERBOSE)
	message(STATUS "Warning flags: ${WARNING_FLAGS}")
endif()
		 

# Compile options for all sources.
target_compile_options(${TARGET_NAME} PRIVATE
	${WARNING_FLAGS}
)

if(${CMAKE_CROSSCOMPILING})
	include (${CMAKE_SCRIPT_PATH}/HardwareOsPostConfig.cmake)
	post_source_hw_os_config()
endif()

if(NOT CMAKE_SIZE)
	set(CMAKE_SIZE size)
	if(WIN32)
		set(FILE_SUFFIX ".exe")
	endif()
endif()

if(EIVE_BUILD_WATCHDOG)
    set(TARGET_STRING "OBSW Watchdog")
else()
    if(TGT_BSP)
        set(TARGET_STRING "Target BSP: ${TGT_BSP}")
    else()
        set(TARGET_STRING "Target BSP: Hosted")
    endif()
endif()

string(CONCAT POST_BUILD_COMMENT
    "Build directory: ${CMAKE_BINARY_DIR}\n"
    "Target OSAL: ${FSFW_OSAL}\n"
    "Target Build Type: ${CMAKE_BUILD_TYPE}\n"
    "${TARGET_STRING}"
)

add_custom_command(
   TARGET ${TARGET_NAME}
   POST_BUILD
   COMMAND ${CMAKE_SIZE} ${TARGET_NAME}${FILE_SUFFIX}
   COMMENT ${POST_BUILD_COMMENT}
)

include (${CMAKE_SCRIPT_PATH}/BuildType.cmake)
set_build_type()