import sys
import locale

from gi.repository import Gtk, Gdk, GObject, GLib


_ = locale.gettext


class LockWindow(Gtk.Window):
    __gsignals__ = {
        'tryUnlock': (GObject.SIGNAL_RUN_FIRST, None, (str,))
    }

    def __init__(self):
        Gtk.Window.__init__(self)

        bg = Gtk.Image.new_from_file("bg.svg")
        self.add(bg)

        self.set_decorated(False)
        self.set_skip_taskbar_hint(True)
        self.set_skip_pager_hint(True)
        self.set_keep_above(True)
        self.fullscreen()

        builder = Gtk.Builder()

        if not builder.add_from_file("unlock.ui"):
            sys.exit(1)

        self.unlockWindow = builder.get_object('unlock_window')
        self.lockLabel = builder.get_object('lock_label')
        self.promptEntry = builder.get_object('prompt_entry')
        self.messageLabel = builder.get_object('message_label')
        self.logoutButton = builder.get_object('logout_button')
        self.unlockButton = builder.get_object('unlock_button')

        self.unlockWindow.set_position(Gtk.WindowPosition.CENTER_ALWAYS)
        self.unlockWindow.set_transient_for(self)
        self.unlockWindow.set_modal(True)

        self.connect('delete-event', lambda w, e: True)
        self.unlockWindow.connect('delete-event', lambda w, e: True)

        self.promptEntry.connect('activate', lambda w: self._tryUnlock())
        self.unlockButton.connect('clicked', lambda w: self._tryUnlock())

        self.reset()

    def _tryUnlock(self):
        self.promptEntry.set_sensitive(False)
        self.unlockButton.set_sensitive(False)
        GLib.idle_add(lambda: self.emit('tryUnlock', self.promptEntry.get_text()))

    def reset(self):
        self.promptEntry.set_text('')
        self.promptEntry.set_sensitive(True)
        self.promptEntry.grab_focus()

        self.unlockButton.set_sensitive(True)

        self.messageLabel.set_label('')

        self.logoutButton.set_sensitive(False)

    def updateLockMessage(self, username, logoutTime = None):
        if logoutTime is None:
            self.lockLabel.set_markup(_('This computer is currently locked by the user <i>{username}</i>.').format(username=GLib.markup_escape_text(username)))
            self.logoutButton.set_sensitive(False)
        elif logoutTime > 0:
            self.lockLabel.set_markup(
                _('This computer is currently locked by the user <i>{username}</i>.\nThe user can be logged out in {minutes:02}:{seconds:02} minutes.').format(
                    username=GLib.markup_escape_text(username), minutes=logoutTime//60, seconds=logoutTime%60))
            self.logoutButton.set_sensitive(False)
        else:
            self.lockLabel.set_markup(
                _('This computer is currently locked by the user <i>{username}</i>.\nThe user can be logged out now.').format(
                    username=GLib.markup_escape_text(username)))
            self.logoutButton.set_sensitive(True)

    def setAuthMessage(self, message):
        self.messageLabel.set_label(message)

    def lock(self):
        self.show_all()
        self.unlockWindow.show_all()

        self.promptEntry.grab_focus()

    def unlock(self):
        self.unlockWindow.hide()
        self.hide()

        self.reset()