# -*- coding: utf-8 -*-
#
#       pympress
#
#       Copyright 2009, 2010 Thomas Jost <thomas.jost@gmail.com>
#       Copyright 2015 Cimbali <me@cimba.li>
#
#       This program 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 2 of the License, or
#       (at your option) any later version.
#
#       This program 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 this program; if not, write to the Free Software
#       Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
#       MA 02110-1301, USA.
"""
:mod:`pympress.__main__` -- The entry point of pympress
-------------------------------------------------------
"""

import logging
import os
import sys
import locale

from pympress import util


# Setup logging, and catch all uncaught exceptions in the log file.
# Load pympress.util early (OS and path-specific things) to load and setup gettext translation asap.
logger = logging.getLogger(__name__)
logging.basicConfig(filename=util.get_log_path(), level=logging.DEBUG)


def uncaught_handler(*exc_info):
    """ Exception handler, to log uncaught exceptions to our log file.
    """
    logger.critical('Uncaught exception:\n{}'.format(logging.Formatter().formatException(exc_info)))
    sys.__excepthook__(*exc_info)


sys.excepthook = uncaught_handler


if util.IS_WINDOWS:
    if os.getenv('LANG') is None:
        lang, enc = locale.getdefaultlocale()
        os.environ['LANG'] = lang

    # Before any initialisation or imports
    util.make_windows_dpi_aware()


try:
    loaded_locale = locale.setlocale(locale.LC_ALL, '')
except locale.Error as err:
    logger.exception('Failed loading locale: {}'.format(err))
    print('Failed loading locale: {}'.format(err), file=sys.stderr)

util.get_translation('pympress').install()


try:
    # python <3.6 does not have this
    ModuleNotFoundError
except NameError:
    ModuleNotFoundError = ImportError  # noqa: A001 -- not shadowing ModuleNotFoundError if it doesn’t exist


# Load python bindings for gobject introspections, aka pygobject, aka gi, and pycairo.
# These are dependencies that are not specified in the setup.py, so we need to start here.
# They are not specified because:
# - installing those via pip requires compiling (always for pygobject, if no compatible wheels exist for cairo),
# - compiling requires a compiling toolchain, development packages of the libraries, etc.,
# - all of this makes more sense to be handled by the OS package manager,
# - it is hard to make pretty error messages pointing this out at `pip install` time,
#   as they would have to be printed when the dependency resolution happens.
# See https://github.com/Cimbali/pympress/issues/100
try:
    import gi
    gi.require_version('Gtk', '3.0')
    from gi.repository import Gtk, Gdk, GLib, Gio
    import cairo
except ModuleNotFoundError:
    logger.critical('Gobject Introspections and/or pycairo module is missing', exc_info = True)
    print(_("""
ERROR: Gobject Introspections and/or pycairo module is missing. Make sure Gtk, pygobject and pycairo are installed.

Try your operating system’s package manager, and ensure you installed pympress with access to system packages.
Typically, this means having installed with:
  pipx install --system-site-packages pympress

Alternately, ask pip to download and compile pygobject and pycairo, for which you may need the Gtk and cairo headers
(or development packages):
  pipx inject pympress pygobject pycairo

For further instructions, refer to https://github.com/Cimbali/pympress/blob/master/README.md#dependencies
"""))
    exit(1)



# Finally the real deal: load pympress modules, handle command line args, and start up
from pympress import app


def main(argv = sys.argv[:]):
    """ Entry point of pympress. Parse command line arguments, instantiate the UI, and start the main loop.
    """
    app.Pympress().run(argv)


if __name__ == "__main__":
    main()

##
# Local Variables:
# mode: python
# indent-tabs-mode: nil
# py-indent-offset: 4
# fill-column: 80
# end:
