#! /usr/bin/env python

#  methlab - A music library application
#  Copyright (C) 2007 Ingmar K. Steen (iksteen@gmail.com)
#
#  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

if __name__ == '__main__':
  import sys

  # Check for Python >= 2.4
  if not hasattr(sys, 'version_info'):
    print >> sys.stderr, 'Error: Python version is too old. Need at least python 2.4.'
    sys.exit(-1)
  if (sys.version_info[0] == 2) and (sys.version_info[1] < 4):
    print >> sys.stderr, 'Error: Python version is too old. Need at least python 2.4.'
    sys.exit(-1)

  # Set up a fake _() to aid the error translation.
  def _(s):
    return s

  # Import gtk and check its version and components.
  pygtk_error = None
  try:
    # Import pygtk meta-module and demand PyGTK-2.0.
    import pygtk
    try:
      pygtk.require('2.0')
    except AssertionError:
      pygtk_error = _('Error: Could not find PyGTK 2.0 installed on your system.')

    try:
      # Check for gtk version >= 2.8.0
      import gtk
      if gtk.check_version(2, 8, 0):
        pygtk_error = _('Error: GTK+-2 version is too old. MethLab requires PyGTK 2.8 or newer.')
      try:
        # Check for gtk.glade
        import gtk.glade
      except ImportError:
        pygtk_error = _('Error: GTK+ 2.8 or newer was found, but the glade component is missing.')
    except ImportError:
      pygtk_error = _('Error: Could not import the GTK+-2 library.')
  except ImportError:
    pygtk_error = _('Error: Could not find PyGTK installed on your system.')

  # Set up GTK to work properly with threads
  gtk.gdk.threads_init()

  # Set up locale and gettext
  import locale
  import gettext
  try:
    locale.setlocale(locale.LC_ALL, '')
  except:
    print >> sys.stderr, 'Warning: Cannot set up locale.'
  gettext.textdomain('methlab')

  from gettext import gettext as _

  # If an error occured with importing PyGTK, print the translation and
  # exit.
  if pygtk_error:
    print >> sys.stderr, gettext.gettext(pygtk_error)
    sys.exit(-1)

  # Set up translation for the .glade files
  gtk.glade.textdomain('methlab')

  # Check for PyGTK and GTK < 2.10.0 and emit a warning
  if gtk.check_version(2, 10, 0):
    print >> sys.stderr, _('Warning: GTK older than 2.10.0 detected. Certain user interface options will be disabled')

  # Check for python-dbus and set it up to use a GLib mainloop.
  try:
    import dbus
    from dbus.mainloop.glib import DBusGMainLoop
    DBusGMainLoop(set_as_default = True)

    # Check if MethLab is already running
    try:
      bus = dbus.SessionBus()
      obj = bus.get_object('org.thegraveyard.MethLab', '/org/thegraveyard/MethLab/MainWindow')
      print >> sys.stderr, _('MethLab is already running. Bringing the window to the front.')
      obj.show()
      sys.exit(0)
    except dbus.DBusException:
      pass

  except ImportError:
    print >> sys.stderr, _('The python-dbus library was not found. Consider installing it.')

  # Finally! Import the user interface and start it
  start_hidden = '--start-hidden' in sys.argv[1:]
  from pymethlab.gtkgui.gui import MethLabWindow
  win = MethLabWindow(start_hidden = start_hidden)
  gtk.main()
  win.scanner.stop()
  win.db.stop()