# pylint: disable=no-member

# This module is only used to create and compile the gevent._corecffi module;
# nothing should be directly imported from it except `ffi`, which should only be
# used for `ffi.compile()`; programs should import gevent._corecfffi.
# However, because we are using "out-of-line" mode, it is necessary to examine
# this file to know what functions are created and available on the generated
# module.
from __future__ import absolute_import, print_function
import sys
import os
import os.path # pylint:disable=no-name-in-module
import struct

__all__ = []

WIN = sys.platform.startswith('win32')

def system_bits():
    return struct.calcsize('P') * 8


def st_nlink_type():
    if sys.platform == "darwin" or sys.platform.startswith("freebsd"):
        return "short"
    if system_bits() == 32:
        return "unsigned long"
    return "long long"


from cffi import FFI
ffi = FFI()

thisdir = os.path.dirname(os.path.abspath(__file__))
def read_source(name):
    with open(os.path.join(thisdir, name), 'r') as f:
        return f.read()

_cdef = read_source('_corecffi_cdef.c')
_source = read_source('_corecffi_source.c')

_cdef = _cdef.replace('#define GEVENT_ST_NLINK_T int', '')
_cdef = _cdef.replace('#define GEVENT_STRUCT_DONE int', '')
_cdef = _cdef.replace('#define GEVENT_UV_OS_SOCK_T int', '')

_cdef = _cdef.replace('GEVENT_ST_NLINK_T', st_nlink_type())
_cdef = _cdef.replace("GEVENT_STRUCT_DONE _;", '...;')
# uv_os_sock_t is int on POSIX and SOCKET on Win32, but socket is
# just another name for handle, which is just another name for 'void*'
# which we will treat as an 'unsigned long' or 'unsigned long long'
# since it comes through 'fileno()' where it has been cast as an int.
# See class watcher.io
_void_pointer_as_integer = 'intptr_t'
_cdef = _cdef.replace("GEVENT_UV_OS_SOCK_T", 'int' if not WIN else _void_pointer_as_integer)


setup_py_dir = os.path.abspath(os.path.join(thisdir, '..', '..', '..'))
libuv_dir = os.path.abspath(os.path.join(setup_py_dir, 'deps', 'libuv'))


LIBUV_INCLUDE_DIRS = [
    thisdir, # libev_vfd.h
    os.path.join(libuv_dir, 'include'),
    os.path.join(libuv_dir, 'src'),
]

# Initially based on https://github.com/saghul/pyuv/blob/v1.x/setup_libuv.py

def _libuv_source(rel_path):
    # Certain versions of setuptools, notably on windows, are *very*
    # picky about what we feed to sources= "setup() arguments must
    # *always* be /-separated paths relative to the setup.py
    # directory, *never* absolute paths." POSIX doesn't have that issue.
    path = os.path.join('deps', 'libuv', 'src', rel_path)
    return path

LIBUV_SOURCES = [
    _libuv_source('fs-poll.c'),
    _libuv_source('inet.c'),
    _libuv_source('threadpool.c'),
    _libuv_source('uv-common.c'),
    _libuv_source('version.c'),
    _libuv_source('uv-data-getter-setters.c'),
]

if WIN:
    LIBUV_SOURCES += [
        _libuv_source('win/async.c'),
        _libuv_source('win/core.c'),
        _libuv_source('win/detect-wakeup.c'),
        _libuv_source('win/dl.c'),
        _libuv_source('win/error.c'),
        _libuv_source('win/fs-event.c'),
        _libuv_source('win/fs.c'),
        # getaddrinfo.c refers to ConvertInterfaceIndexToLuid
        # and ConvertInterfaceLuidToNameA, which are supposedly in iphlpapi.h
        # and iphlpapi.lib/dll. But on Windows 10 with Python 3.5 and VC 14 (Visual Studio 2015),
        # I get an undefined warning from the compiler for those functions and
        # a link error from the linker, so this file can't be included.
        # This is possibly because the functions are defined for Windows Vista, and
        # Python 3.5 builds with at earlier SDK?
        # Fortunately we don't use those functions.
        #_libuv_source('win/getaddrinfo.c'),
        # getnameinfo.c refers to uv__getaddrinfo_translate_error from
        # getaddrinfo.c, which we don't have.
        #_libuv_source('win/getnameinfo.c'),
        _libuv_source('win/handle.c'),
        _libuv_source('win/loop-watcher.c'),
        _libuv_source('win/pipe.c'),
        _libuv_source('win/poll.c'),
        _libuv_source('win/process-stdio.c'),
        _libuv_source('win/process.c'),
        _libuv_source('win/req.c'),
        _libuv_source('win/signal.c'),
        _libuv_source('win/snprintf.c'),
        _libuv_source('win/stream.c'),
        _libuv_source('win/tcp.c'),
        _libuv_source('win/thread.c'),
        _libuv_source('win/timer.c'),
        _libuv_source('win/tty.c'),
        _libuv_source('win/udp.c'),
        _libuv_source('win/util.c'),
        _libuv_source('win/winapi.c'),
        _libuv_source('win/winsock.c'),
    ]
else:
    LIBUV_SOURCES += [
        _libuv_source('unix/async.c'),
        _libuv_source('unix/core.c'),
        _libuv_source('unix/dl.c'),
        _libuv_source('unix/fs.c'),
        _libuv_source('unix/getaddrinfo.c'),
        _libuv_source('unix/getnameinfo.c'),
        _libuv_source('unix/loop-watcher.c'),
        _libuv_source('unix/loop.c'),
        _libuv_source('unix/pipe.c'),
        _libuv_source('unix/poll.c'),
        _libuv_source('unix/process.c'),
        _libuv_source('unix/signal.c'),
        _libuv_source('unix/stream.c'),
        _libuv_source('unix/tcp.c'),
        _libuv_source('unix/thread.c'),
        _libuv_source('unix/timer.c'),
        _libuv_source('unix/tty.c'),
        _libuv_source('unix/udp.c'),
    ]


if sys.platform.startswith('linux'):
    LIBUV_SOURCES += [
        _libuv_source('unix/linux-core.c'),
        _libuv_source('unix/linux-inotify.c'),
        _libuv_source('unix/linux-syscalls.c'),
        _libuv_source('unix/procfs-exepath.c'),
        _libuv_source('unix/proctitle.c'),
        _libuv_source('unix/sysinfo-loadavg.c'),
        _libuv_source('unix/sysinfo-memory.c'),
    ]
elif sys.platform == 'darwin':
    LIBUV_SOURCES += [
        _libuv_source('unix/bsd-ifaddrs.c'),
        _libuv_source('unix/darwin.c'),
        _libuv_source('unix/darwin-proctitle.c'),
        _libuv_source('unix/fsevents.c'),
        _libuv_source('unix/kqueue.c'),
        _libuv_source('unix/proctitle.c'),
    ]
elif sys.platform.startswith(('freebsd', 'dragonfly')):
    LIBUV_SOURCES += [
        _libuv_source('unix/bsd-ifaddrs.c'),
        _libuv_source('unix/freebsd.c'),
        _libuv_source('unix/kqueue.c'),
        _libuv_source('unix/posix-hrtime.c'),
    ]
elif sys.platform.startswith('openbsd'):
    LIBUV_SOURCES += [
        _libuv_source('unix/bsd-ifaddrs.c'),
        _libuv_source('unix/kqueue.c'),
        _libuv_source('unix/openbsd.c'),
        _libuv_source('unix/posix-hrtime.c'),
    ]
elif sys.platform.startswith('netbsd'):
    LIBUV_SOURCES += [
        _libuv_source('unix/bsd-ifaddrs.c'),
        _libuv_source('unix/kqueue.c'),
        _libuv_source('unix/netbsd.c'),
        _libuv_source('unix/posix-hrtime.c'),
    ]

elif sys.platform.startswith('sunos'):
    LIBUV_SOURCES += [
        _libuv_source('unix/no-proctitle.c'),
        _libuv_source('unix/sunos.c'),
    ]


LIBUV_MACROS = []

def _define_macro(name, value):
    LIBUV_MACROS.append((name, value))

LIBUV_LIBRARIES = []

def _add_library(name):
    LIBUV_LIBRARIES.append(name)

if sys.platform != 'win32':
    _define_macro('_LARGEFILE_SOURCE', 1)
    _define_macro('_FILE_OFFSET_BITS', 64)

if sys.platform.startswith('linux'):
    _add_library('dl')
    _add_library('rt')
elif sys.platform == 'darwin':
    _define_macro('_DARWIN_USE_64_BIT_INODE', 1)
    _define_macro('_DARWIN_UNLIMITED_SELECT', 1)
elif sys.platform.startswith('netbsd'):
    _add_library('kvm')
elif sys.platform.startswith('sunos'):
    _define_macro('__EXTENSIONS__', 1)
    _define_macro('_XOPEN_SOURCE', 500)
    _add_library('kstat')
    _add_library('nsl')
    _add_library('sendfile')
    _add_library('socket')
elif WIN:
    _define_macro('_GNU_SOURCE', 1)
    _define_macro('WIN32', 1)
    _define_macro('_CRT_SECURE_NO_DEPRECATE', 1)
    _define_macro('_CRT_NONSTDC_NO_DEPRECATE', 1)
    _define_macro('_CRT_SECURE_NO_WARNINGS', 1)
    _define_macro('_WIN32_WINNT', '0x0600')
    _add_library('advapi32')
    _add_library('iphlpapi')
    _add_library('psapi')
    _add_library('shell32')
    _add_library('user32')
    _add_library('userenv')
    _add_library('ws2_32')

ffi.cdef(_cdef)
ffi.set_source('gevent.libuv._corecffi',
               _source,
               sources=LIBUV_SOURCES,
               depends=LIBUV_SOURCES,
               include_dirs=LIBUV_INCLUDE_DIRS,
               libraries=list(LIBUV_LIBRARIES),
               define_macros=list(LIBUV_MACROS))

if __name__ == '__main__':
    ffi.compile()
