import os

import osutil

import util

import _winreg

def systemrcpath():

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

    rcpath = []

    filename = util.executablepath()

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

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

    if os.path.isfile(progrc):

        rcpath.append(progrc)

        return rcpath

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

    progrcd = os.path.join(os.path.dirname(filename), 'hgrc.d')

    if os.path.isdir(progrcd):

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

            if f.endswith('.rc'):

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

        return rcpath

    # else look for a system rcpath in the registry

    value = util.lookupreg('SOFTWARE\\Mercurial', None,

                           _winreg.HKEY_LOCAL_MACHINE)

    if not isinstance(value, str) or not value:

        return rcpath

    value = util.localpath(value)

    for p in value.split(os.pathsep):

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

            rcpath.append(p)

        elif os.path.isdir(p):

            for f, kind in osutil.listdir(p):

                if f.endswith('.rc'):

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

    return rcpath

def userrcpath():

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

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

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

            os.path.join(home, '.hgrc')]

    userprofile = os.environ.get('USERPROFILE')

    if userprofile and userprofile != home:

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

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

    return path