cmake_minimum_required(VERSION 3.14)

# set(CMAKE_BUILD_TYPE Release)

set(CMAKE_CXX_STANDARD 23)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")

option(USE_XSIMD "Use of XSIMD library to generate vectorized code" ON)


find_package(ASIO QUIET)
if (ASIO_FOUND)
    # message(STATUS "ASIO library was found")
else()
    message(STATUS "ASIO library was not found! Try to download it!")

    include(FetchContent)
    include(ExternalProject)

    FetchContent_Declare(asio_lib
         SOURCE_DIR ${CMAKE_BINARY_DIR}/asio_lib
         BINARY_DIR ${CMAKE_BINARY_DIR}
         GIT_REPOSITORY "https://github.com/chriskohlhoff/asio"
         GIT_TAG "asio-1-32-0"
         GIT_SHALLOW TRUE
         GIT_SUBMODULES ""
         GIT_PROGRESS TRUE
    )
    FetchContent_MakeAvailable(asio_lib)
    # FetchContent_GetProperties(asio_lib SOURCE_DIR asio_SOURCE_DIR)

    set(ASIO_INSTALL_DIR ${CMAKE_BINARY_DIR}/asio_lib/asio)
    find_package(ASIO)
endif()

# find_package(spdlog CONFIG)

set(spdlog_FOUND FALSE )
if (NOT spdlog_FOUND)
    message(STATUS "SPDLOG libarary was not found! Try to download it!")

    include(FetchContent)
    include(ExternalProject)

    set(SPDLOG_USE_STD_FORMAT ON CACHE INTERNAL "Use of C++20 std::format")
    set(SPDLOG_FMT_EXTERNAL OFF CACHE INTERNAL "Turn off external fmt library")

    FetchContent_Declare(spdlog
    # ExternalProject_Add(spdlog
         # SOURCE_DIR ${CMAKE_BINARY_DIR}/spdlog_lib
         # BINARY_DIR ${CMAKE_BINARY_DIR}/spdlog_lib/build
         GIT_REPOSITORY "https://github.com/gabime/spdlog.git"
         GIT_TAG "v1.15.1"
         GIT_SHALLOW TRUE
         GIT_SUBMODULES ""
         GIT_PROGRESS TRUE
         CMAKE_ARGS "-DSPDLOG_USE_STD_FORMAT=ON -DSPDLOG_FMT_EXTERNAL=OFF"
         # CONFIGURE_COMMAND ""
         # BUILD_COMMAND ""
         # INSTALL_COMMAND ""
         # UPDATE_COMMAND ""
         # SOURCE_SUBDIR cmake # turn off building
         OVERRIDE_FIND_PACKAGE
    )
    # FetchContent_MakeAvailable(spdlog)
    # FetchContent_GetProperties(spdlog_lib SOURCE_DIR spdlog_SOURCE_DIR)
    find_package(spdlog CONFIG)
endif()

add_compile_definitions(SPDLOG_USE_STD_FORMAT)
add_compile_definitions(SPDLOG_FMT_EXTERNAL=0)

if (USE_XSIMD)
    # fetch XSIMD library
    add_compile_definitions(VEC_XSIMD)
endif()

# ERFA library
include(ExternalProject)
ExternalProject_Add(erfalib
    PREFIX ${CMAKE_BINARY_DIR}/erfa_lib
    GIT_REPOSITORY "https://github.com/liberfa/erfa.git"
    GIT_TAG "v2.0.1"
    UPDATE_COMMAND ""
    PATCH_COMMAND ""
    # BINARY_DIR erfa_build
    # SOURCE_DIR erfa
    # INSTALL_DIR
    LOG_CONFIGURE 1
    CONFIGURE_COMMAND meson setup --reconfigure -Ddefault_library=static -Dbuildtype=release
                                  -Dprefix=${CMAKE_BINARY_DIR}/erfa_lib -Dlibdir= -Dincludedir= -Ddatadir= <SOURCE_DIR>
                                  # CONFIGURE_COMMAND meson setup --reconfigure -Ddefault_library=static -Dbuildtype=release -Dc_args='-march=native' -Doptimization=3
                                  #                               -Dprefix=${CMAKE_BINARY_DIR}/erfa_lib -Dlibdir= -Dincludedir= -Ddatadir= <SOURCE_DIR>
    BUILD_COMMAND ninja -C <BINARY_DIR>
    INSTALL_COMMAND meson install -C <BINARY_DIR>
    BUILD_BYPRODUCTS ${CMAKE_BINARY_DIR}/erfa_lib/liberfa.a
)
add_library(ERFA_LIB STATIC IMPORTED)
set_target_properties(ERFA_LIB PROPERTIES IMPORTED_LOCATION ${CMAKE_BINARY_DIR}/erfa_lib/liberfa.a)
add_dependencies(ERFA_LIB erfalib)
set(ERFA_INCLUDE_DIR ${CMAKE_BINARY_DIR}/erfa_lib)
include_directories(${ERFA_INCLUDE_DIR})

option(WITH_TESTS "Build tests" ON)


add_subdirectory(fitpack)

# Mount client-to-server communication protocol
# (extended LX200 protocol)
#

# set(CNTR_PROTO_LIB_SRC comm_proto.h comm_proto.cpp)
set(CNTR_PROTO_LIB_SRC
    control_proto.h
    control_proto.cpp
    utils.h
)

set(CNTR_PROTO_LIB comm_proto)
add_library(${CNTR_PROTO_LIB} STATIC ${CNTR_PROTO_LIB_SRC})

set(MOUNT_SERVER_APP_SRC mount.h mount_state.h mount_server.cpp comm_server.h comm_server_endpoint.h comm_server_configfile.h mount_astrom.h
    mount_astrom_default.h mcc_coord.h mount_pz.h mcc_fsm.h mcc_fsm_utils.h)
set(MOUNT_SERVER_APP mount_server)
add_executable(${MOUNT_SERVER_APP} ${MOUNT_SERVER_APP_SRC}
    mcc_finite_state_machine.h
    mcc_mount_events_states.h)
# target_include_directories(${MOUNT_SERVER_APP} PUBLIC ${ERFA_INCLUDE_DIR})
target_link_libraries(${MOUNT_SERVER_APP} ${CNTR_PROTO_LIB} spdlog::spdlog_header_only ERFA_LIB)

if (WITH_TESTS)
    set(CNTR_PROTO_TEST_APP cntr_proto_test)
    add_executable(${CNTR_PROTO_TEST_APP} tests/cntr_proto_test.cpp)
    target_link_libraries(${CNTR_PROTO_TEST_APP} ${CNTR_PROTO_LIB} spdlog::spdlog_header_only)
    # target_link_libraries(${CNTR_PROTO_TEST_APP} ${CNTR_PROTO_LIB})
    # target_include_directories(${CNTR_PROTO_TEST_APP} PUBLIC ${SPDLOG_INCLUDE_DIRS})

    set(CFGFILE_TEST_APP configfile_test)
    add_executable(${CFGFILE_TEST_APP} tests/configfile_test.cpp)

    set(ASTROM_TEST_APP astrom_test)
    add_executable(${ASTROM_TEST_APP} tests/astrom_test.cpp)
    target_link_libraries(${ASTROM_TEST_APP} ERFA_LIB)

    set(FITPACK_TEST_APP fitpack_test)
    add_executable(${FITPACK_TEST_APP} tests/fitpack_test.cpp)
    target_link_libraries(${FITPACK_TEST_APP}  fitpack)
    target_include_directories(${FITPACK_TEST_APP} PRIVATE ${FITPACK_INCLUDE_DIR})
    # message(STATUS "INC UP: " ${FITPACK_INCLUDE_DIR})

    set(FSM_TEST_APP fsm_test)
    add_executable(${FSM_TEST_APP} tests/fsm_test.cpp)

endif()