# Prepare the same complete component layout that worked locally, inside build.
# Run before project() so ESP-IDF can discover the generated component normally.
if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/../components/lwip/CMakeLists.txt")
    message(FATAL_ERROR "Remove components/lwip: it would override the generated build component.")
endif()
if(NOT PYTHON)
    find_package(Python3 REQUIRED COMPONENTS Interpreter)
    set(PYTHON "${Python3_EXECUTABLE}")
endif()
set(monitoring_lwip_generator "${CMAKE_CURRENT_LIST_DIR}/../patches/lwip/prepare.py")
set(monitoring_arp_source "${CMAKE_CURRENT_LIST_DIR}/../patches/lwip/etharp.c")
set(monitoring_lwip_dir "${CMAKE_BINARY_DIR}/monitoring_components/lwip")
execute_process(
    COMMAND "${PYTHON}" "${monitoring_lwip_generator}"
        "${IDF_PATH}/components/lwip" "${monitoring_lwip_dir}" "${monitoring_arp_source}"
    RESULT_VARIABLE monitoring_lwip_result
    OUTPUT_VARIABLE monitoring_lwip_output
    ERROR_VARIABLE monitoring_lwip_error
)
if(NOT monitoring_lwip_result EQUAL 0)
    message(FATAL_ERROR "lwIP preparation failed: ${monitoring_lwip_error}")
endif()
set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS
    "${monitoring_lwip_generator}"
    "${IDF_PATH}/components/lwip/CMakeLists.txt"
    "${IDF_PATH}/components/lwip/lwip/src/include/lwip/sockets.h"
    "${IDF_PATH}/components/lwip/port/linux/include/sys/fcntl.h")
list(APPEND EXTRA_COMPONENT_DIRS "${monitoring_lwip_dir}")
message(STATUS "lwIP: prepared in ${monitoring_lwip_dir}; ARP source is patches/lwip/etharp.c")