# coding: utf-8
#
# Copyright © 2013-2015 Ejwa Software. All rights reserved.
#
# This file is part of gitinspector.
#
# gitinspector is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# gitinspector is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with gitinspector. If not, see <http://www.gnu.org/licenses/>.

from __future__ import print_function
from __future__ import unicode_literals
import gettext
import locale
import os
import re
import sys
import time
from . import basedir

__enabled__ = False
__installed__ = False
__translation__ = None

#Dummy function used to handle string constants
def N_(message):
	return message

def init():
	global __enabled__
	global __installed__
	global __translation__

	if not __installed__:
		try:
			locale.setlocale(locale.LC_ALL, "")
		except locale.Error:
			__translation__ = gettext.NullTranslations()
		else:
			lang = locale.getlocale()

			#Fix for non-POSIX-compliant systems (Windows et al.).
			if os.getenv('LANG') is None:
				lang = locale.getdefaultlocale()

				if lang[0]:
					os.environ['LANG'] = lang[0]

			if lang[0] is not None:
				filename = basedir.get_basedir() + "/translations/messages_%s.mo" % lang[0][0:2]

				try:
					__translation__ = gettext.GNUTranslations(open(filename, "rb"))
				except IOError:
					__translation__ = gettext.NullTranslations()
			else:
				print("WARNING: Localization disabled because the system language could not be determined.", file=sys.stderr)
				__translation__ = gettext.NullTranslations()

		__enabled__ = True
		__installed__ = True
		__translation__.install(True)

def check_compatibility(version):
	if isinstance(__translation__, gettext.GNUTranslations):
		header_pattern = re.compile("^([^:\n]+): *(.*?) *$", re.MULTILINE)
		header_entries = dict(header_pattern.findall(_("")))

		if header_entries["Project-Id-Version"] != "gitinspector {0}".format(version):
			print("WARNING: The translation for your system locale is not up to date with the current gitinspector "
			      "version. The current maintainer of this locale is {0}.".format(header_entries["Last-Translator"]),
			      file=sys.stderr)

def get_date():
	if __enabled__ and isinstance(__translation__, gettext.GNUTranslations):
		date = time.strftime("%x")

		if hasattr(date, 'decode'):
			date = date.decode("utf-8", "replace")

		return date
	else:
		return time.strftime("%Y/%m/%d")

def enable():
	if isinstance(__translation__, gettext.GNUTranslations):
		__translation__.install(True)

		global __enabled__
		__enabled__ = True

def disable():
	global __enabled__
	__enabled__ = False

	if __installed__:
		gettext.NullTranslations().install(True)