#!/usr/bin/env python
# -*- coding: iso-8859-1 -*-
# Copyright (C) 2008-2014 Bastian Kleineidam
#
# 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.
"""
Check HTML pages for broken links. This is the GUI client.
"""
import sys
import signal
from linkcheck import configuration, drop_privileges, i18n
from linkcheck.loader import is_frozen
if is_frozen():
    # Let Python find the C++ runtime DLLs for PyQt.
    import os
    from linkcheck import get_install_data
    sys.path.append(os.path.join(get_install_data(), 'Microsoft.VC90.CRT'))
from PyQt4.QtGui import QApplication
from linkcheck.fileutil import is_readable
from linkcheck.gui import LinkCheckerMain, get_app_style
from linkcheck.gui.projects import ProjectExt


def excepthook (window, etype, evalue, tb):
    """Catch unhandled exceptions."""
    from cStringIO import StringIO
    from linkcheck.director.console import internal_error
    out = i18n.get_encoded_writer(out=StringIO(), encoding="utf-8")
    internal_error(out=out, etype=etype, evalue=evalue, tb=tb)
    # signal main window to be thread-safe
    window.error_signal.emit(out.getvalue())


def main (argv=None):
    """Initialize the Qt application, handle commandline arguments
    and show the main window."""
    if argv is None:
        argv = sys.argv
    app = QApplication(argv)
    app.setApplicationName(configuration.AppName)
    app.setApplicationVersion(configuration.Version)
    app.setOrganizationName(configuration.Author)
    QApplication.setStyle(get_app_style())
    QApplication.setPalette(QApplication.style().standardPalette())
    args = app.arguments()
    mainkwargs = {}
    if len(args) > 1:
        fileorurl = unicode(args[1])
        if is_readable(fileorurl) and fileorurl.lower().endswith(ProjectExt):
            mainkwargs["project"] = fileorurl
        else:
            mainkwargs["url"] = fileorurl
    signal.signal(signal.SIGINT, signal.SIG_DFL)
    # use local variable here to avoid garbage collection of the main
    # window before app.exec_() finishes
    window = LinkCheckerMain(**mainkwargs)
    window.show()
    window.raise_() # this will raise the window on Mac OS X
    drop_privileges()
    sys.excepthook = \
       lambda etype, evalue, tb: excepthook(window, etype, evalue, tb)
    sys.exit(app.exec_())


if __name__ == "__main__":
    main()