# Copyright (C) 2016-2018 Philipp Hörist <philipp AT hoerist.com>
# Copyright (C) 2005-2006 Nikos Kouremenos <kourem AT gmail.com>
# Copyright (C) 2005-2014 Yann Leboulanger <asterix AT lagaule.org>
# Copyright (C) 2008 Stephan Erb <steve-e AT h3c.de>
#
# This file is part of Gajim.
#
# Gajim 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; version 3 only.
#
# Gajim 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 Gajim. If not, see <http://www.gnu.org/licenses/>.

from typing import cast

import sys
import os
import traceback
import threading
import webbrowser
import platform
from io import StringIO
from urllib.parse import urlencode

import nbxmpp
from gi.repository import Gtk, GObject

try:
    import gajim
    gajim_version = gajim.__version__
except ImportError:
    # For standalone testing
    gajim_version = 'Package not installed'

if __name__ == '__main__':
    glade_file = os.path.join('data', 'gui', 'exception_dialog.ui')
else:
    from gajim.common import configpaths
    gui_path = cast(str, configpaths.get('GUI'))
    glade_file = os.path.join(gui_path, 'exception_dialog.ui')


_exception_in_progress = threading.Lock()

ISSUE_TEXT = '''## Versions
- OS: {}
- GTK+ Version: {}
- PyGObject Version: {}
- python-nbxmpp Version: {}
- Gajim Version: {}

## Traceback
```
{}
```
## Steps to reproduce the problem
...'''


def _hook(type_, value, tb):
    if not _exception_in_progress.acquire(False):
        # Exceptions have piled up, so we use the default exception
        # handler for such exceptions
        sys.__excepthook__(type_, value, tb)
        return

    ExceptionDialog(type_, value, tb)
    _exception_in_progress.release()


class ExceptionDialog():
    def __init__(self, type_, value, tb):
        builder = Gtk.Builder()
        builder.add_from_file(glade_file)
        self.dialog = builder.get_object("ExceptionDialog")
        builder.connect_signals(self)
        builder.get_object("report_btn").grab_focus()
        self.exception_view = builder.get_object("exception_view")
        buffer_ = self.exception_view.get_buffer()
        trace = StringIO()
        traceback.print_exception(type_, value, tb, None, trace)
        self.text = self.get_issue_text(trace.getvalue())
        buffer_.set_text(self.text)
        print(self.text)
        self.exception_view.set_editable(False)
        self.dialog.show()
        if __name__ == '__main__':
            self.dialog.connect('delete-event', self._on_delete_event)

    def on_report_clicked(self, *args):
        issue_url = 'https://dev.gajim.org/gajim/gajim/issues/new'
        params = {'issue[description]': self.text}
        url = '{}?{}'.format(issue_url, urlencode(params))
        webbrowser.open(url, new=2)

    def on_close_clicked(self, *args):
        self.dialog.destroy()
        if __name__ == '__main__':
            Gtk.main_quit()

    def _on_delete_event(self, *args):
        Gtk.main_quit()

    def get_issue_text(self, traceback_text):
        gtk_ver = '%i.%i.%i' % (
            Gtk.get_major_version(),
            Gtk.get_minor_version(),
            Gtk.get_micro_version())
        gobject_ver = '.'.join(map(str, GObject.pygobject_version))

        return ISSUE_TEXT.format(get_os_info(),
                                 gtk_ver,
                                 gobject_ver,
                                 nbxmpp.__version__,
                                 gajim_version,
                                 traceback_text)


def init():
    if os.name == 'nt' or not sys.stderr.isatty():
        sys.excepthook = _hook


def get_os_info():
    if os.name == 'nt' or sys.platform == 'darwin':
        return platform.system() + " " + platform.release()
    if os.name == 'posix':
        try:
            import distro
            return distro.name(pretty=True)
        except ImportError:
            return platform.system()
    return ''


# this is just to assist testing (python3 gtkexcepthook.py)
if __name__ == '__main__':
    init()
    print(sys.version)
    ExceptionDialog(None, None, None)
    Gtk.main()