find_package (Python3 REQUIRED COMPONENTS Interpreter)
find_package (RAGEL 6.9 REQUIRED)
find_package (fmt REQUIRED)

if (WIN32)
    # Enable features for Windows Vista and higher
    add_definitions("-D_WIN32_WINNT=0x0600")
endif ()


###############################################################################
include (TestBigEndian)
TEST_BIG_ENDIAN(ENDIANNESS)
if (ENDIANNESS)
    add_definitions(-DWORDS_BIGENDIAN)
endif()


###############################################################################
RAGEL_TARGET(uri uri.cpp.rl ${CMAKE_CURRENT_BINARY_DIR}/uri.rl.cpp COMPILE_FLAGS -G2)
RAGEL_TARGET(version version.cpp.rl ${CMAKE_CURRENT_BINARY_DIR}/version.cpp)
RAGEL_TARGET(parse8601 time/parse8601.cpp.rl ${CMAKE_CURRENT_BINARY_DIR}/time/parse8601.cpp)


###############################################################################
add_library(libcruft-util)

target_link_libraries(libcruft-util ${NC_CXX_STDCXXFS} fmt::fmt)


# Setup a directory to hold built sources we may need to export to clients.
set (PREFIX_BASE "${CMAKE_CURRENT_BINARY_DIR}/generated")
set (PREFIX "${PREFIX_BASE}/cruft/util")
file (MAKE_DIRECTORY "${PREFIX}")

target_include_directories(libcruft-util
PUBLIC
    $<BUILD_INTERFACE:${PREFIX_BASE}>
)


# Preemptively define an identity panic macro so that TCL doens't fuck us over
# by renaming a commonly used symbol.
target_compile_definitions(libcruft-util PUBLIC "-Dpanic=panic")


###############################################################################
search_libs (BACKTRACE_LIB backtrace execinfo)
search_libs (DBGHELP_LIB SymFromAddr dbghelp)
check_function_exists (RtlCaptureStackBackTrace HAVE_CAPTURESTACKBACKTRACE)


##-----------------------------------------------------------------------------
if (BACKTRACE_LIB_FOUND)
    list (APPEND UTIL_FILES backtrace_execinfo.cpp)
elseif (HAVE_CAPTURESTACKBACKTRACE)
    list (APPEND UTIL_FILES backtrace_stackwalk.cpp)
    target_link_libraries(libcruft-util dbghelp)
else ()
    list (APPEND UTIL_FILES backtrace_null.cpp)
endif ()


###############################################################################
# Platform wrappers
if (LINUX)
    list (APPEND UTIL_FILES exe_linux.cpp)
elseif (FREEBSD)
    list (APPEND UTIL_FILES exe_freebsd.cpp)
elseif (WIN32)
    list (APPEND UTIL_FILES exe_win32.cpp)
else ()
    message (FATAL_ERROR "unhandled platform")
endif ()


###############################################################################
# platform wrappers
list (
    APPEND UTIL_FILES
    posix/dir.cpp
    posix/dir.hpp
    posix/except.cpp
    posix/except.hpp
    posix/fd.cpp
    posix/fd.hpp
    posix/flock.cpp
    posix/flock.hpp
    posix/ostream.cpp
    posix/ostream.hpp
    posix/util.cpp
    posix/util.hpp
)


##-----------------------------------------------------------------------------
if (LINUX)
    list (APPEND UTIL_FILES
        thread/event_futex.cpp
        thread/flag_futex.cpp
        rand/system_linux.cpp
        rand/system_linux.hpp
        )
endif ()


##-----------------------------------------------------------------------------
if (NOT WIN32)
    list (
        APPEND UTIL_FILES
        buffer/circular.cpp
        buffer/circular.hpp
        buffer/paged.cpp
        buffer/paged.hpp
        memory/system.cpp
        memory/system.hpp
        debug_posix.cpp
        debug/crash_posix.cpp
        debug/fpe_posix.cpp
        debug/system_posix.cpp
        fs/tmp_posix.cpp
        io_posix.cpp
        io_posix.hpp
        library_posix.hpp
        library_posix.cpp
        paths_posix.cpp
        posix/fwd.hpp
        posix/interface.hpp
        posix/interface.cpp
        posix/map.cpp
        posix/map.hpp
        posix/socket.cpp
        posix/socket.hpp
        time_posix.cpp
    )
endif ()


##-----------------------------------------------------------------------------
if (WIN32)
    list (
        APPEND UTIL_FILES
        debug_win32.cpp
        debug/crash_win32.cpp
        debug/fpe_win32.cpp
        debug/system_win32.cpp
        exe_win32.cpp
        fs/tmp_win32.cpp
        io_win32.cpp
        io_win32.hpp
        library_win32.cpp
        library_win32.hpp
        paths_win32.cpp
        rand/system_win32.cpp
        rand/system_win32.hpp
        time_win32.cpp
        win32/windows.hpp
        win32/except.cpp
        win32/except.hpp
        win32/file.cpp
        win32/file.hpp
        win32/handle.cpp
        win32/handle.hpp
        win32/registry.cpp
        win32/registry.hpp
    )

    target_link_libraries (libcruft-util ws2_32)
endif ()


###############################################################################
list (APPEND UTIL_FILES
    thread/event.hpp
    thread/flag.hpp
    thread/primitive.hpp
    thread/semaphore.hpp
)

if (LINUX)
    list (APPEND UTIL_FILES
        thread/event_futex.cpp
        thread/event_futex.hpp
        thread/semaphore_linux.hpp
        thread/semaphore_linux.cpp
        thread/flag_futex.cpp
        thread/flag_futex.hpp
    )
elseif (WIN32)
    list (APPEND UTIL_FILES
        thread/event_std.cpp
        thread/event_std.hpp
        thread/event_win32.cpp
        thread/semaphore_win32.hpp
        thread/semaphore_win32.cpp
        thread/flag_std.cpp
        thread/flag_std.hpp
    )
else ()
    message (FATAL_ERROR "Unsupported thread platform")
endif ()


if (host_cpu STREQUAL "x86_64")
    list (APPEND UTIL_FILES
        cpuid/x86.cpp
        cpuid/x86.hpp
    )
else ()
    message (WARNING "Unknown architecture ${host_cpu}. Defaulting to null implementation")
    list (APPEND UTIL_FILES
        cpuid/none.cpp
        cpuid/none.hpp
    )
endif ()


if (WIN32)
    list (APPEND UTIL_FILES sysinfo_win32.cpp)
else ()
    list (APPEND UTIL_FILES sysinfo_posix.cpp)
endif ()


###############################################################################
# Common files
list (
    APPEND UTIL_FILES
    fwd.hpp

    adapter.hpp
    adapter.cpp
    algo/search.hpp
    algo/sort.cpp
    algo/sort.hpp
    alloc/fwd.hpp
    alloc/affix.cpp
    alloc/affix.hpp
    alloc/aligned/direct.hpp
    alloc/aligned/foreign.hpp
    alloc/allocator.cpp
    alloc/allocator.hpp
    alloc/chunked.cpp
    alloc/chunked.hpp
    alloc/easy.hpp
    alloc/fallback.cpp
    alloc/fallback.hpp
    alloc/linear.cpp
    alloc/linear.hpp
    alloc/malloc.cpp
    alloc/malloc.hpp
    alloc/null.cpp
    alloc/null.hpp
    alloc/stack.cpp
    alloc/stack.hpp
    alloc/std.hpp
    alloc/traits.hpp
    alloc/traits.hpp
    annotation.hpp
    array/darray.hpp
    array/md.cpp
    array/md.hpp
    array/parray.cpp
    array/parray.hpp
    array/sarray.cpp
    array/sarray.hpp
    array/varray.hpp
    ascii.hpp
    backtrace.hpp
    bezier.cpp
    bezier1.cpp
    bezier2.cpp
    bezier3.cpp
    bezier.hpp
    bitwise.cpp
    bitwise.hpp
    bool.cpp
    bool.hpp
    buffer/simple.cpp
    buffer/simple.hpp
    buffer/traits.hpp
    cast.hpp
    cmdopt.cpp
    cmdopt.hpp
    cmdopt2/fwd.hpp
    cmdopt2/args.cpp
    cmdopt2/args.hpp
    cmdopt2/parser.cpp
    cmdopt2/parser.hpp
    colour.cpp
    colour.hpp
    concepts.hpp
    concepts/clock.hpp
    concepts/string.hpp
    container.hpp
    coord.hpp
    coord/fwd.hpp
    coord/base.hpp
    coord/comparator.hpp
    coord/init.hpp
    coord/iostream.hpp
    coord/ops.hpp
    coord/store.hpp
    coord/traits.hpp
    cpp.cpp
    cpp.hpp
    cpuid.cpp
    cpuid.hpp
    debug/assert.cpp
    debug/assert.hpp
    debug/common.cpp
    debug/common.hpp
    debug/compiler.cpp
    debug/compiler.hpp
    debug/crash.hpp
    debug/debugger.cpp
    debug/debugger.hpp
    debug/fpe.hpp
    debug/fpe.cpp
    debug/memory.cpp
    debug/memory.hpp
    debug/panic.cpp
    debug/panic.hpp
    debug/system.cpp
    debug/system.hpp
    debug/trace.cpp
    debug/trace.hpp
    debug/validate.cpp
    debug/validate.hpp
    debug/warn.cpp
    debug/warn.hpp
    encode/number.hpp
    encode/base.cpp
    encode/base.hpp
    endian.cpp
    endian.hpp
    except.cpp
    except.hpp
    exe.hpp
    expected.hpp
    extent.cpp
    extent.hpp
    fixed.cpp
    fixed.hpp
    fixed_string.hpp
    float.cpp
    float.hpp
    format/quoted.hpp
    fourcc.cpp
    fourcc.hpp
    fs/scoped.cpp
    fs/scoped.hpp
    fs/tmp.hpp
    functor.hpp
    geom/fwd.hpp
    geom/aabb.cpp
    geom/aabb.hpp
    geom/cylinder.cpp
    geom/cylinder.hpp
    geom/ellipse.cpp
    geom/ellipse.hpp
    geom/frustum.cpp
    geom/frustum.hpp
    geom/iostream.cpp
    geom/iostream.hpp
    geom/line.hpp
    geom/line.cpp
    geom/ops.cpp
    geom/ops.hpp
    geom/plane.cpp
    geom/plane.hpp
    geom/ray.cpp
    geom/ray.hpp
    geom/rect.cpp
    geom/rect.hpp
    geom/region.cpp
    geom/sample/fwd.hpp
    geom/sample/edge.hpp
    geom/sample/surface.hpp
    geom/sample/volume.hpp
    geom/sample/subregion.hpp
    geom/segment.cpp
    geom/segment.hpp
    geom/sphere.cpp
    geom/sphere.hpp
    geom/traits.hpp
    geom/tri.cpp
    geom/tri.hpp
    hash.hpp
    hash/fwd.hpp
    hash/adapter.hpp
    hash/adler.cpp
    hash/adler.hpp
    hash/buzhash.hpp
    hash/bsdsum.cpp
    hash/bsdsum.hpp
    hash/crc.cpp
    hash/crc.hpp
    hash/fasthash.cpp
    hash/fasthash.hpp
    hash/fletcher.cpp
    hash/fletcher.hpp
    hash/fnv1a.cpp
    hash/fnv1a.hpp
    hash/halfsipmix.cpp
    hash/halfsipmix.hpp
    hash/mix.cpp
    hash/mix.hpp
    hash/murmur/common.cpp
    hash/murmur/common.hpp
    hash/murmur.hpp
    hash/murmur/murmur1.cpp
    hash/murmur/murmur1.hpp
    hash/murmur/murmur2.cpp
    hash/murmur/murmur2.hpp
    hash/murmur/murmur3.cpp
    hash/murmur/murmur3.hpp
    hash/siphash.cpp
    hash/siphash.hpp
    hash/std.cpp
    hash/std.hpp
    hash/table.cpp
    hash/table.hpp
    hash/tuple.cpp
    hash/tuple.hpp
    hash/wang.hpp
    hash/xxhash.cpp
    hash/xxhash.hpp
    init.cpp
    init.hpp
    introspection/enum_manual.cpp
    introspection/enum_manual.hpp
    introspection/enum_simple.cpp
    introspection/enum_simple.hpp
    introspection/name.cpp
    introspection/name.hpp
    introspection/type.cpp
    introspection/type.hpp
    io.cpp
    io.hpp
    iterator/cast.hpp
    iterator/constant.hpp
    iterator/counting.hpp
    iterator/dereference.hpp
    iterator/discard.hpp
    iterator/indices.hpp
    iterator/infix.hpp
    iterator/iota.hpp
    iterator/numeric.hpp
    iterator/placement_output.hpp
    iterator/referencing.hpp
    iterator/transform.hpp
    iterator/tuple_picker.hpp
    iterator/unequal.hpp
    iterator/unordered_insert.hpp
    iterator/zip.hpp
    job/fwd.hpp
    job/dispatch.hpp
    job/queue.cpp
    job/queue.hpp
    kmeans.hpp
    library.hpp
    list/node.hpp
    list/sort.hpp
    log.hpp
    log/fwd.hpp
    log/level.cpp
    log/level.hpp
    log/log.cpp
    log/log.hpp
    log/packet.cpp
    log/packet.hpp
    log/scoped.cpp
    log/scoped.hpp
    log/sink/base.cpp
    log/sink/base.hpp
    log/sink/console.cpp
    log/sink/console.hpp
    log/sink/null.cpp
    log/sink/null.hpp
    log/sink/path.cpp
    log/sink/path.hpp
    map/multi_fixed.cpp
    map/multi_fixed.hpp
    map/fixed.cpp
    map/fixed.hpp
    maths.cpp
    maths.hpp
    maths/fast.hpp
    matrix.cpp
    matrix2.cpp
    matrix3.cpp
    matrix4.cpp
    matrix.hpp
    memory/deleter.cpp
    memory/deleter.hpp
    parallel/queue.cpp
    parallel/queue.hpp
    parallel/stack.cpp
    parallel/stack.hpp
    parse/fwd.hpp
    parse/enum.cpp
    parse/enum.hpp
    parse/time.cpp
    parse/time.hpp
    parse/value.cpp
    parse/value.hpp
    parse/si.cpp
    parse/si.hpp
    paths.cpp
    paths.hpp
    platform.hpp
    point.cpp
    point.hpp
    pointer.hpp
    polynomial.cpp
    polynomial.hpp
    pool.cpp
    pool.hpp
    "${PREFIX}/preprocessor.hpp"
    quaternion.cpp
    quaternion.hpp
    rand/distribution/normal.cpp
    rand/distribution/normal.hpp
    rand/distribution/uniform.cpp
    rand/distribution/uniform.hpp
    rand/generic.hpp
    rand/lcg.cpp
    rand/lcg.hpp
    rand/mwc64x.cpp
    rand/mwc64x.hpp
    rand/pcg.cpp
    rand/pcg.hpp
    rand/rdrand.cpp
    rand/rdrand.hpp
    rand/splitmix64.hpp
    rand/system.hpp
    rand/xoshiro.cpp
    rand/xoshiro.hpp
    rand/xorshift.cpp
    rand/xorshift.hpp
    random.cpp
    random.hpp
    range.cpp
    range.hpp
    ranges/adjacent.hpp
    ranges/chunk.hpp
    ranges/enumerate.hpp
    ranges/izip.hpp
    rational.cpp
    rational.hpp
    region.cpp
    region.hpp
    registrar.cpp
    registrar.hpp
    roots/bisection.hpp
    scoped.hpp
    serialise/converter.hpp
    serialise/ops.hpp
    serialise/std.hpp
    set/dset.cpp
    set/dset.hpp
    signal.cpp
    signal.hpp
    singleton.hpp
    stats.cpp
    stats.hpp
    std.hpp
    stream.cpp
    stream.hpp
    string.cpp
    string.hpp
    stringcache.cpp
    stringcache.hpp
    stringid.cpp
    stringid.hpp
    strongdef.cpp
    strongdef.hpp
    sysinfo.hpp
    tap.cpp
    tap.hpp
    term.cpp
    term.hpp
    thread/event.hpp
    thread/flag.hpp
    thread/monitor.cpp
    thread/monitor.hpp
    thread/ticketlock.cpp
    thread/ticketlock.hpp
    thread/spinlock.cpp
    thread/spinlock.hpp
    time.cpp
    time.hpp
    time/parse.hpp
    time/parse8601.cpp
    tuple/index.hpp
    tuple/type.hpp
    tuple/value.hpp
    typeidx.cpp
    typeidx.hpp
    types.hpp
    types/sized.hpp
    types/comparator.hpp
    types/description.cpp
    types/description.hpp
    types/dispatch.hpp
    types/string.cpp
    types/string.hpp
    types/tagged.hpp
    types/traits.hpp
    uri.cpp
    uri.rl.cpp
    uri.hpp
    utf8.cpp
    utf8.hpp
    variadic.cpp
    variadic.hpp
    vector.cpp
    vector.hpp
    version.cpp
    version.hpp
    view.cpp
    view.hpp
)

option (SIMD "enable simd support" OFF)

if (SIMD)
    list (APPEND UTIL_FILES
        "coord/simd.cpp"
        "coord/simd.hpp"
        "coord/simd_sse.hpp"
        "coord/simd_neon.hpp"
    )
endif ()

##-----------------------------------------------------------------------------
## We shouldn't be building into the source directory, but I can't stand trying
## to coax CMake into behaving here any longer. Feel free to fix it.
add_custom_command (
OUTPUT
    "${PREFIX}/preprocessor.hpp"
COMMENT
    "[preprocessor.py] preprocessor.hpp"
COMMAND
    "${Python3_EXECUTABLE}"
    "${CMAKE_CURRENT_SOURCE_DIR}/../../preprocessor.py"
    "${PREFIX}/preprocessor.hpp"
    480
DEPENDS
    "${CMAKE_CURRENT_SOURCE_DIR}/../../preprocessor.py"
)


###############################################################################
target_sources(libcruft-util PRIVATE ${UTIL_FILES})
set_target_properties(libcruft-util
PROPERTIES
    EXPORT_NAME "util"
)

target_include_directories(libcruft-util
PUBLIC
    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../..>
)

install (TARGETS libcruft-util EXPORT cruft-util-targets LIBRARY COMPONENT development)

set (headers ${UTIL_FILES})
list (FILTER headers INCLUDE REGEX "\\.hpp$")
install (FILES ${headers} DESTINATION "include/cruft/util" COMPONENT development)

search_libs (SHM_LIBS shm_open rt)
search_libs (DL_LIBS dlopen dl)
search_libs (CLOCK_LIBS clock_gettime rt c)
search_libs (MATH_LIBS cos m)

target_link_libraries(libcruft-util ${SHM_LIBS})
target_link_libraries(libcruft-util ${DL_LIBS})
target_link_libraries(libcruft-util ${CLOCK_LIBS})
target_link_libraries(libcruft-util ${MATH_LIBS})

# HACK: -ldl isn't getting discovered correctly so we add it unconditionally
# for the time being.
if (NOT WIN32)
    target_link_libraries(libcruft-util dl)
endif ()


###############################################################################
add_library(cruft::util ALIAS libcruft-util)
#add_library(cruft-util ALIAS cruft-util::cruft-util)

export(
    TARGETS libcruft-util
    NAMESPACE cruft::
    APPEND FILE "${CMAKE_BINARY_DIR}/cruftConfig.cmake"
)

install (
    EXPORT cruft-util-targets
    NAMESPACE cruft::
    FILE cruft-config.cmake
    DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/cruft"
)