from __future__ import absolute_import

import os

from . import (

    encoding,

    pycompat,

    util,

    win32,

)

try:

    import _winreg as winreg  # pytype: disable=import-error

    winreg.CloseKey

except ImportError:

    # py2 only

    import winreg  # pytype: disable=import-error

# MS-DOS 'more' is the only pager available by default on Windows.

fallbackpager = b'more'

def systemrcpath():

    '''return default os-specific hgrc search path'''

    rcpath = []

    filename = win32.executablepath()

    # Use mercurial.ini found in directory with hg.exe

    progrc = os.path.join(os.path.dirname(filename), b'mercurial.ini')

    rcpath.append(progrc)

    def _processdir(progrcd):

        if os.path.isdir(progrcd):

            for f, kind in util.listdir(progrcd):

                if f.endswith(b'.rc'):

                    rcpath.append(os.path.join(progrcd, f))

    # Use hgrc.d found in directory with hg.exe

    _processdir(os.path.join(os.path.dirname(filename), b'hgrc.d'))

    # treat a PROGRAMDATA directory as equivalent to /etc/mercurial

    programdata = encoding.environ.get(b'PROGRAMDATA')

    if programdata:

        programdata = os.path.join(programdata, b'Mercurial')

        _processdir(os.path.join(programdata, b'hgrc.d'))

        ini = os.path.join(programdata, b'mercurial.ini')

        if os.path.isfile(ini):

            rcpath.append(ini)

        ini = os.path.join(programdata, b'hgrc')

        if os.path.isfile(ini):

            rcpath.append(ini)

    # next look for a system rcpath in the registry

    value = util.lookupreg(

        b'SOFTWARE\\Mercurial', None, winreg.HKEY_LOCAL_MACHINE

    )

    if value and isinstance(value, bytes):

        value = util.localpath(value)

        for p in value.split(pycompat.ospathsep):

            if p.lower().endswith(b'mercurial.ini'):

                rcpath.append(p)

            else:

                _processdir(p)

    return rcpath

def userrcpath():

    '''return os-specific hgrc search path to the user dir'''

    home = os.path.expanduser(b'~')

    path = [os.path.join(home, b'mercurial.ini'), os.path.join(home, b'.hgrc')]

    userprofile = encoding.environ.get(b'USERPROFILE')

    if userprofile and userprofile != home:

        path.append(os.path.join(userprofile, b'mercurial.ini'))

        path.append(os.path.join(userprofile, b'.hgrc'))

    return path

def termsize(ui):

    return win32.termsize()