cmake_minimum_required(VERSION 3.21)
project(cxx-dataflow LANGUAGES C)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_FLAGS "-fPIC")

set(DORA_ROOT_DIR "__DORA_PATH__" CACHE FILEPATH "Path to the root of dora")

set(dora_c_include_dir "${CMAKE_CURRENT_BINARY_DIR}/include/c")
if(DORA_ROOT_DIR)
    include(ExternalProject)
    ExternalProject_Add(Dora
        SOURCE_DIR ${DORA_ROOT_DIR}
        BUILD_IN_SOURCE True
        CONFIGURE_COMMAND ""
        BUILD_COMMAND
            cargo build
            --package dora-node-api-c
        INSTALL_COMMAND ""
    )

    add_custom_command(OUTPUT ${dora_c_include_dir}
        WORKING_DIRECTORY ${DORA_ROOT_DIR}
        DEPENDS Dora
        COMMAND
            mkdir ${CMAKE_CURRENT_BINARY_DIR}/include/c -p
            &&
            cp apis/c/node ${CMAKE_CURRENT_BINARY_DIR}/include/c -r
    )

    add_custom_target(Dora_c DEPENDS ${dora_c_include_dir})
    set(dora_link_dirs ${DORA_ROOT_DIR}/target/debug)
else()
    include(ExternalProject)
    ExternalProject_Add(Dora
        PREFIX ${CMAKE_CURRENT_BINARY_DIR}/dora
        GIT_REPOSITORY https://github.com/dora-rs/dora.git
        GIT_TAG main
        BUILD_IN_SOURCE True
        CONFIGURE_COMMAND ""
        BUILD_COMMAND
            cargo build
            --package dora-node-api-c
            --target-dir ${CMAKE_CURRENT_BINARY_DIR}/dora/src/Dora/target
        INSTALL_COMMAND ""
    )

    add_custom_command(OUTPUT ${dora_c_include_dir}
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/dora/src/Dora/target
        DEPENDS Dora
        COMMAND
            mkdir ${CMAKE_CURRENT_BINARY_DIR}/include/c -p
            &&
            cp ../apis/c/node ${CMAKE_CURRENT_BINARY_DIR}/include/c -r
    )

    set(dora_link_dirs ${CMAKE_CURRENT_BINARY_DIR}/dora/src/Dora/target/debug)

    add_custom_target(Dora_c DEPENDS ${dora_c_include_dir})
endif()

link_directories(${dora_link_dirs})

add_executable(talker_1 talker_1/node.c)
add_dependencies(talker_1 Dora_c)
target_include_directories(talker_1 PRIVATE ${dora_c_include_dir})
target_link_libraries(talker_1 dora_node_api_c m z)

add_executable(talker_2 talker_2/node.c)
add_dependencies(talker_2 Dora_c)
target_include_directories(talker_2 PRIVATE ${dora_c_include_dir})
target_link_libraries(talker_2 dora_node_api_c m z)

add_executable(listener_1 listener_1/node.c)
add_dependencies(listener_1 Dora_c)
target_include_directories(listener_1 PRIVATE ${dora_c_include_dir})
target_link_libraries(listener_1 dora_node_api_c m z)

install(TARGETS listener_1 talker_1 talker_2 DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/bin)
