## Put everything together into one nice function.

include (CTest)

## Regenerate the git commit ID if git exists.
find_program(GIT_COMMAND git)
if (GIT_COMMAND)
    message(STATUS "Git command is ${GIT_COMMAND}")
else ()
    message(STATUS "Git not found -- will not update or include .git-commit-id.h")
endif ()

add_custom_target(update_sim_commit ALL
    COMMAND ${CMAKE_COMMAND}
        -D GIT_COMMIT_DEST=${CMAKE_SOURCE_DIR}
        -P ${CMAKE_SOURCE_DIR}/cmake/git-commit-id.cmake
    BYPRODUCTS
        ${CMAKE_SOURCE_DIR}/.git-commit-id
        ${CMAKE_SOURCE_DIR}/.git-commit-id.h
    WORKING_DIRECTORY
        ${CMAKE_SOURCE_DIR}
)

## Simulator sources and library:
set(SIM_SOURCES
    ${CMAKE_SOURCE_DIR}/scp.c
    ${CMAKE_SOURCE_DIR}/sim_card.c
    ${CMAKE_SOURCE_DIR}/sim_console.c
    ${CMAKE_SOURCE_DIR}/sim_disk.c
    ${CMAKE_SOURCE_DIR}/sim_ether.c
    ${CMAKE_SOURCE_DIR}/sim_fio.c
    ${CMAKE_SOURCE_DIR}/sim_imd.c
    ${CMAKE_SOURCE_DIR}/sim_scsi.c
    ${CMAKE_SOURCE_DIR}/sim_serial.c
    ${CMAKE_SOURCE_DIR}/sim_sock.c
    ${CMAKE_SOURCE_DIR}/sim_tape.c
    ${CMAKE_SOURCE_DIR}/sim_timer.c
    ${CMAKE_SOURCE_DIR}/sim_tmxr.c
    ${CMAKE_SOURCE_DIR}/sim_video.c)

set(SIM_VIDEO_SOURCES
    ${CMAKE_SOURCE_DIR}/display/display.c
    ${CMAKE_SOURCE_DIR}/display/sim_ws.c)

## Build a simulator core library, with and without AIO support. The AIO variant
## has "_aio" appended to its name, e.g., "simhz64_aio" or "simhz64_video_aio".
function(build_simcore _targ)
    cmake_parse_arguments(SIMH "VIDEO;INT64;ADDR64;BESM6_SDL_HACK" "" "" ${ARGN})

    # Additional library targets that depend on simulator I/O:
    add_library(${_targ} STATIC ${SIM_SOURCES})

    set(sim_aio_lib "${_targ}_aio")
    add_library(${sim_aio_lib} STATIC ${SIM_SOURCES})

    # Components that need to be turned on while building the library, but
    # don't export out to the dependencies (hence PRIVATE.)
    foreach (lib IN ITEMS "${_targ}" "${sim_aio_lib}")
        set_target_properties(${lib} PROPERTIES
            C_STANDARD 99
            EXCLUDE_FROM_ALL True
        )
        target_compile_definitions(${lib} PRIVATE USE_SIM_CARD USE_SIM_IMD)
        target_compile_options(${lib} PRIVATE ${EXTRA_TARGET_CFLAGS})
        target_link_options(${lib} PRIVATE ${EXTRA_TARGET_LFLAGS})

        # Make sure that the top-level directory is part of the libary's include path:
        target_include_directories("${lib}" PUBLIC "${CMAKE_SOURCE_DIR}")

        if (SIMH_INT64)
            target_compile_definitions(${lib} PUBLIC USE_INT64)
        endif (SIMH_INT64)

        if (SIMH_ADDR64)
            target_compile_definitions(${lib} PUBLIC USE_ADDR64)
        endif (SIMH_ADDR64)

        if (SIMH_VIDEO)
            if (WITH_VIDEO)
                # It's the video library
                target_sources(${lib} PRIVATE ${SIM_VIDEO_SOURCES})
                target_link_libraries(${lib} PUBLIC simh_video)
            endif ()
            if (CMAKE_HOST_APPLE AND NOT SIMH_BESM6_SDL_HACK)
                ## (a) The BESM6 SDL hack is temporary. If SDL_MAIN_AVAILABLE needs
                ##     to be defined, it belongs in the simh_video interface library.
                ## (b) BESM6 doesn't use SIMH's video capabilities correctly and
                ##     the makefile filters out SDL_MAIN_AVAILABLE on macOS.
                ## (c) This shouldn't be just an Apple platform quirk; SDL_main should
                ##     be used by all platforms. <sigh!>
                target_compile_definitions("${lib}" PUBLIC SDL_MAIN_AVAILABLE)
            endif ()
        endif ()

        # Define SIM_BUILD_TOOL for the simulator'
        target_compile_definitions("${lib}" PRIVATE
             "SIM_BUILD_TOOL=CMake (${CMAKE_GENERATOR})"
        )

        target_link_libraries(${lib} PUBLIC
            simh_network
            simh_regexp
            os_features
            thread_lib
        )

        # Ensure that sim_rev.h picks up .git-commit-id.h if the git command is
        # available.
        if (GIT_COMMAND)
            target_compile_definitions("${lib}" PRIVATE SIM_NEED_GIT_COMMIT_ID)
        endif ()

        add_dependencies(${lib} update_sim_commit)
    endforeach ()

    target_compile_definitions(${sim_aio_lib} PUBLIC ${AIO_FLAGS})

    # Create target cppcheck rule, if detected.
    if (ENABLE_CPPCHECK AND cppcheck_cmd)
        get_property(cppcheck_includes TARGET ${_targ} PROPERTY INCLUDE_DIRECTORIES)
        get_property(cppcheck_defines  TARGET ${_targ} PROPERTY COMPILE_DEFINITIONS)
        list(TRANSFORM cppcheck_includes PREPEND "-I")
        list(TRANSFORM cppcheck_defines  PREPEND "-D")

        add_custom_target("${_targ}_cppcheck"
            COMMAND ${cppcheck_cmd} ${cppcheck_defines} ${cppcheck_includes} ${SIM_SOURCES}
            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
            VERBATIM
        )

        add_dependencies(cppcheck "${_targ}_cppcheck")
    endif (ENABLE_CPPCHECK AND cppcheck_cmd)
endfunction(build_simcore _targ)


##+
## Basic template for simh executables and unit tests.
##-
## FEATURE_INT64: Use the simhi64 library (defines USE_INT64)
## FEATURE_FULL64: Use the simhz64 library (defines USE_INT64, USE_ADDR64)
## BUILDROMS: Build the hardcoded boot rooms
## FEATURE_VIDEO: Add video support
## FEATURE_DISPLAY: Add display support
##
## BESM6_SDL_HACK: A TEMPORARY feature to work around issues with BESM6 and
##   SDL and SIMH video. Because it's a day ending in "y", there's going to
##   be another makefile quirk.
list(APPEND ADD_SIMULATOR_OPTIONS
    "FEATURE_INT64"
    "FEATURE_FULL64"
    "BUILDROMS"
    "FEATURE_VIDEO"
    "FEATURE_DISPLAY"
    "NO_INSTALL"
    "BESM6_SDL_HACK"
    "USES_AIO"
)

## TEST: The test script name that will be executed by the simulator within CTest.
## LABEL: The test name label, used to group tests, e.g., "VAX" for all of the
##   VAX simulator tests. If you want to run a subset of tests, add the "-L <regexp>"
##   argument to the ctest command line.
## PKG_FAMILY: The simulator family to which a simulator belongs. If not specificed,
##   defaults to "default_family".
list(APPEND ADD_SIMULATOR_1ARG
    "TEST"
    "LABEL"
    "PKG_FAMILY"
)

## DEFINES: List of extra command line manifest constants ("-D" items)
## INCLUDES: List of extra include directories
## SOURCES: List of source files
list(APPEND ADD_SIMULATOR_NARG
    "DEFINES"
    "INCLUDES"
    "SOURCES"
)

function (simh_executable_template _targ)
    cmake_parse_arguments(SIMH "${ADD_SIMULATOR_OPTIONS}" "${ADD_SIMULATOR_1ARG}" "${ADD_SIMULATOR_NARG}" ${ARGN})

    if (NOT DEFINED SIMH_SOURCES)
        message(FATAL_ERROR "${_targ}: No source files?")
    endif (NOT DEFINED SIMH_SOURCES)

    if (SIMH_USES_AIO AND NOT WITH_ASYNC)
        message(WARNING
          "!!! ${_targ}: Asynchronous I/O not enabled, but this simulator specifies USES_AIO\n"
          "!!!           Some features will be crippled, notably networking.")
    endif ()

    add_executable("${_targ}" "${SIMH_SOURCES}")
    set_target_properties(${_targ} PROPERTIES
        C_STANDARD 99
        RUNTIME_OUTPUT_DIRECTORY ${SIMH_LEGACY_INSTALL}
    )
    target_compile_options(${_targ} PRIVATE ${EXTRA_TARGET_CFLAGS})
    target_link_options(${_targ} PRIVATE ${EXTRA_TARGET_LFLAGS})

    if (MINGW)
        ## target_compile_options(${_targ} PUBLIC "-fms-extensions")
        target_link_options(${_targ} PUBLIC "-mconsole")
    elseif (MSVC)
        target_link_options(${_targ} PUBLIC "/SUBSYSTEM:CONSOLE")
    endif ()

    if (DEFINED SIMH_DEFINES)
        target_compile_definitions("${_targ}" PUBLIC "${SIMH_DEFINES}")
    endif (DEFINED SIMH_DEFINES)

    # This is a quick cheat to make sure that all of the include paths are
    # absolute paths.
    if (DEFINED SIMH_INCLUDES)
        set(_normalized_includes)
        foreach (inc IN LISTS SIMH_INCLUDES)
            if (NOT IS_ABSOLUTE "${inc}")
                message(">> Fixing include for ${_targ}: ${inc} -> ${CMAKE_SOURCE_DIR}/${inc}")
                get_filename_component(inc "${CMAKE_SOURCE_DIR}/${inc}" ABSOLUTE)
            endif ()
            list(APPEND _normalized_includes "${inc}")
        endforeach ()

        target_include_directories("${_targ}" PUBLIC "${_normalized_includes}")
    endif ()

    if (WITH_VIDEO)
        if (SIMH_FEATURE_DISPLAY)
            target_compile_definitions(${_targ} PUBLIC USE_DISPLAY)
        endif ()
    endif ()

    set(SIMH_SIMLIB simhcore)
    if (SIMH_FEATURE_INT64)
        set(SIMH_SIMLIB simhi64)
    elseif (SIMH_FEATURE_FULL64)
        set(SIMH_SIMLIB simhz64)
    endif ()

    if (SIMH_FEATURE_VIDEO OR SIMH_FEATURE_DISPLAY)
        if (NOT SIMH_BESM6_SDL_HACK)
            string(APPEND SIMH_SIMLIB "_video")
        else ()
            string(APPEND SIMH_SIMLIB "_besm6")
        endif ()
    endif ()

    # Uses AIO...
    if (SIMH_USES_AIO)
        set(SIMH_SIMLIB "${SIMH_SIMLIB}_aio")
    endif()

    target_link_libraries("${_targ}" PUBLIC "${SIMH_SIMLIB}")
endfunction ()


function (add_simulator _targ)
    simh_executable_template(${_targ} "${ARGN}")
    cmake_parse_arguments(SIMH "${ADD_SIMULATOR_OPTIONS}" "${ADD_SIMULATOR_1ARG}" "${ADD_SIMULATOR_NARG}" ${ARGN})

    set(pkg_family "default_family")
    if (SIMH_PKG_FAMILY)
        set(pkg_family ${SIMH_PKG_FAMILY})
    endif ()

    set(_install_opts)
    if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.21")
        list(APPEND _install_opts RUNTIME_DEPENDENCY_SET simhRuntime)
    endif ()

    install(TARGETS ${_targ} 
        ${_install_opts}
        RUNTIME 
        COMPONENT ${pkg_family}
    )

    if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.21")
        ## Collect runtime dependencies. The simhRuntime install() is invoked by cpack-setup.cmake
        install(IMPORTED_RUNTIME_ARTIFACTS ${_targ} COMPONENT ${pkg_family} BUNDLE COMPONENT ${pkg_family})
    endif()

    ## Simulator-specific tests:
    list(APPEND test_cmd "${_targ}" "RegisterSanityCheck")

    if (DEFINED SIMH_TEST)
        string(APPEND test_fname ${CMAKE_CURRENT_SOURCE_DIR} "/tests/${SIMH_TEST}_test.ini")
        IF (EXISTS "${test_fname}")
            list(APPEND test_cmd "${test_fname}" "-v")
        ENDIF ()
    endif ()

    add_test(NAME "simh-${_targ}" COMMAND ${test_cmd})

    if (SIMH_LABEL)
        set_tests_properties("simh-${_targ}" PROPERTIES LABELS "simh-${SIMH_LABEL}")
    endif ()

    if (BUILD_SHARED_DEPS)
        ## Make sure that the tests can find the DLLs/shared objects:
        file(TO_NATIVE_PATH "${SIMH_DEP_TOPDIR}/bin" native_dep_bindir)
        file(TO_NATIVE_PATH "${CMAKE_BINARY_DIR}" native_binary_dir)
    endif ()

    ## Build up test environment:
    ## - Simulators that link SDL2 need to use the dummy (null) drivers on tests within
    ##   the CI/CD environment. While not STRICTLY necessary, it's a good idea.
    list(APPEND test_add_env "SDL_VIDEODRIVER=dummy")
    list(APPEND test_add_env "SDL_AUDIODRIVER=dummy")

    if (WIN32)
        if (BUILD_SHARED_DEPS)
            set(test_path "PATH=${native_dep_bindir}\\\$<SEMICOLON>${native_binary_dir}\\$<SEMICOLON>")
            string(REPLACE ";" "\\\$<SEMICOLON>" escaped_path "$ENV{PATH}")
            string(APPEND test_path "${escaped_path}")
            list(APPEND test_add_env "${test_path}")
        endif ()
    else ()
        if (BUILD_SHARED_DEPS)
            list(APPEND test_add_env "LD_LIBRARY_PATH=${native_dep_bindir}:${native_binary_dir}:\$LD_LIBRARY_PATH")
        endif ()
    endif ()

    set_property(TEST "simh-${_targ}" PROPERTY ENVIRONMENT "${test_add_env}")

    if (DONT_USE_ROMS)
        target_compile_definitions(DONT_USE_INTERNAL_ROM)
    elseif (SIMH_BUILDROMS)
        add_dependencies(${_targ} BuildROMs)
    endif ()

    # Create target 'cppcheck' rule, if cppcheck detected:
    if (ENABLE_CPPCHECK AND cppcheck_cmd)
        get_property(cppcheck_includes TARGET ${_targ} PROPERTY INCLUDE_DIRECTORIES)
        get_property(cppcheck_defines  TARGET ${_targ} PROPERTY COMPILE_DEFINITIONS)
        list(TRANSFORM cppcheck_includes PREPEND "-I")
        list(TRANSFORM cppcheck_defines  PREPEND "-D")
        add_custom_target("${_targ}_cppcheck"
            COMMAND ${cppcheck_cmd} ${cppcheck_defines} ${cppcheck_includes} ${SIMH_SOURCES}
            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
        )

        add_dependencies(cppcheck "${_targ}_cppcheck")
    endif (ENABLE_CPPCHECK AND cppcheck_cmd)
endfunction ()


function(add_unit_test _targ)
    set(UNIT_TARGET "simbase-${_targ}")
    set(UNIT_TEST "simbase-${_targ}")

    simh_executable_template(${UNIT_TARGET} "${ARGN}")
    cmake_parse_arguments(SIMH "FEATURE_INT64;FEATURE_FULL64;BUILDROMS;FEATURE_VIDEO,FEATURE_DISPLAY"
                          "SOURCE_DIR;LABEL"
                          "DEFINES;INCLUDES;SOURCES"
                          ${ARGN})

    target_link_libraries(${UNIT_TARGET} PUBLIC unittest)
    add_test(NAME ${UNIT_TEST} COMMAND ${UNIT_TARGET})

    set(TEST_LABEL "simbase;unit")
    if (SIMH_LABEL)
      list(APPEND TEST_LABEL "simbase-${SIMH_LABEL}")
    endif ()
    set_tests_properties(${UNIT_TEST} PROPERTIES LABELS "${TEST_LABEL}")
endfunction ()

##~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=
## Now build things!
##~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=

if (ENABLE_CPPCHECK AND cppcheck_cmd)
    add_custom_target(cppcheck)
endif ()

build_simcore(simhcore)
build_simcore(simhi64        INT64)
build_simcore(simhz64        INT64 ADDR64)
build_simcore(simhcore_video VIDEO)
build_simcore(simhi64_video  VIDEO INT64)
build_simcore(simhz64_video  VIDEO INT64 ADDR64)

## Temporary hack for BESM6's breakage.
build_simcore(simhi64_besm6  VIDEO INT64 BESM6_SDL_HACK)

if (NOT DONT_USE_ROMS)
    add_executable(BuildROMs sim_BuildROMs.c)
    target_include_directories(BuildROMs PUBLIC "${CMAKE_SOURCE_DIR}")
    target_link_libraries(BuildROMs os_features)
    add_custom_command(
        OUTPUT
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka655x_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka620_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka630_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka610_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka410_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka411_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka412_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka41a_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka41d_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka42a_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka42b_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka43a_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka46a_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka47a_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka48a_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_is1000_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka410_xs_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka420_rdrz_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka420_rzrz_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka4xx_4pln_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka4xx_8pln_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka4xx_dz_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka4xx_spx_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka750_bin_new.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_ka750_bin_old.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_vcb02_bin.h
            ${CMAKE_SOURCE_DIR}/VAX/vax_vmb_exe.h
            ${CMAKE_SOURCE_DIR}/PDP11/pdp11_vt_lunar_rom.h
            ${CMAKE_SOURCE_DIR}/PDP11/pdp11_dazzle_dart_rom.h
            ${CMAKE_SOURCE_DIR}/PDP11/pdp11_11logo_rom.h
            ${CMAKE_SOURCE_DIR}/swtp6800/swtp6800/swtp_swtbugv10_bin.h
        MAIN_DEPENDENCY BuildROMs
        COMMAND BuildROMS
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    )
endif ()

## Front panel test.
##
## From all evidence in makefile, sim_frontpanel isn't used yet by any targets.
##
## Needs curses...
add_executable(frontpaneltest
    ${CMAKE_SOURCE_DIR}/frontpanel/FrontPanelTest.c
    ${CMAKE_SOURCE_DIR}/sim_sock.c
    ${CMAKE_SOURCE_DIR}/sim_frontpanel.c)

target_include_directories(frontpaneltest PUBLIC "${CMAKE_SOURCE_DIR}")
target_link_libraries(frontpaneltest PUBLIC os_features thread_lib)

if (WIN32)
    target_link_libraries(frontpaneltest PUBLIC simh_network)

    if (MSVC)
            target_link_options(frontpaneltest PUBLIC "/SUBSYSTEM:CONSOLE")
    elseif (MINGW)
            target_link_options(frontpaneltest PUBLIC "-mconsole")
    endif ()
endif (WIN32)