from gettext import gettext as _
from gettext import ngettext
from datetime import datetime, timedelta
import threading
import gtk
import gtk.glade as glade
import gtk.gdk as gdk
import gnomeapplet
import bonobo.ui
import gst
from timerapplet import core
from timerapplet import ui
from timerapplet import utils
from timerapplet import config

class __GstPlayThread(threading.Thread):
    def __init__(self, ply):
        self.ply = ply
        threading.Thread.__init__(self)
    def run(self):
        self.ply.set_state(gst.STATE_PLAYING)
        def bus_event(bus, message):
            t = message.type
            if t == gst.MESSAGE_EOS:
                self.ply.set_state(gst.STATE_NULL)
            return True
        self.ply.get_bus().add_watch(bus_event)
 
def gstplay(file_path):
    ply = gst.element_factory_make("playbin", "player")
    ply.set_property("uri", "file://" + file_path)
    pt = __GstPlayThread(ply)
    pt.start()

def construct_time_str(remaining_seconds, show_all=True):
    """Return a user-friendly representation of remaining time based on the given number of seconds.
    
    show_all specifies whether the returned string should show all time components.
    If show_all is True (default), the returned string is in HH:MM:SS format.
    If show_all is False, the returned string is in either HH:MM or MM:SS format,
    depending on how much time is remaining. This avoids showing the user more
    information than necessary.
    
    """
    hours, minutes, seconds = utils.seconds_to_hms(remaining_seconds)
    if show_all:
        # HH:MM:SS
        return _('%02d:%02d:%02d') % (hours, minutes, seconds)
    else:
        if hours > 0 or minutes > 14:
            # HH:MM
            return _('%02d:%02d') % (hours, minutes)
        else:
            # MM:SS
            return _('%02d:%02d') % (minutes, seconds)

def get_display_text_from_datetime(date_time):
    return date_time.strftime('%X')
    
def on_widget_button_press_event(sender, event, data=None):
    if event.button != 1:
        sender.emit_stop_by_name('button-press-event')  
    return False

def force_no_focus_padding(widget):
    gtk.rc_parse_string('\n'
                        '   style "timer-applet-button-style"\n'
                        '   {\n'
                        '      GtkWidget::focus-line-width=0\n'
                        '      GtkWidget::focus-padding=0\n'
                        '   }\n'
                        '\n'
                        '   widget "*.timer-applet-button" style "timer-applet-button-style"\n'
                        '\n')
    widget.set_name('timer-applet-button')

class TimerApplet(object):
    _SHOW_REMAINING_TIME_KEY = 'show_remaining_time'
    _PLAY_SOUND_KEY = 'play_notification_sound'
    _USE_CUSTOM_SOUND_KEY = 'use_custom_notification_sound'
    _CUSTOM_SOUND_PATH_KEY = 'custom_notification_sound_path'
    
    _PRESETS_PLACEHOLDER_NAME = 'Placeholder'
    _PRESETS_PLACEHOLDER_PATH = '/popups/popup/Presets/' + _PRESETS_PLACEHOLDER_NAME
    _PRESETS_PATH = '/popups/popup/Presets'

    def __init__(self, presets_store, manage_presets_dialog, applet, timer, gconf_wrapper):
        self._presets_store = presets_store
        self._manage_presets_dialog = manage_presets_dialog
        self._applet = applet
        self._timer = timer
        
        self._status_button = ui.StatusButton()
        self._notifier = ui.Notifier('TimerApplet', gtk.STOCK_DIALOG_INFO, self._status_button)
        self._start_timer_dialog = ui.StartTimerDialog(config.GLADE_PATH,
                                                       lambda name: utils.is_valid_preset_name(name,
                                                                                               self._presets_store),
                                                       self._presets_store.get_model(),
                                                       lambda row_iter: utils.get_preset_display_text(self._presets_store,
                                                                                                      row_iter))
        self._continue_dialog = ui.ContinueTimerDialog(config.GLADE_PATH,
                                                       _('Continue timer countdown?'),
                                                       _('The timer is currently paused. Would you like to continue countdown?'))
        self._preferences_dialog = ui.PreferencesDialog(config.GLADE_PATH)
        self._gconf = gconf_wrapper
        
        self._about_dialog = glade.XML(config.GLADE_PATH, 'about_dialog').get_widget('about_dialog')
        self._about_dialog.set_version(config.VERSION)
        
        self._applet.set_applet_flags(gnomeapplet.EXPAND_MINOR)
        self._applet.setup_menu_from_file(None,
                                          config.POPUP_MENU_FILE_PATH,
                                          None,
                                          [('PauseTimer', lambda component, verb: self._timer.stop()),
                                           ('ContinueTimer', lambda component, verb: self._timer.start()),
                                           ('StopTimer', lambda component, verb: self._timer.reset()),
                                           ('RestartTimer', lambda component, verb: self._restart_timer()),
                                           ('ManagePresets', lambda component, verb: self._manage_presets_dialog.show()),
                                           ('Preferences', lambda component, verb: self._preferences_dialog.show()),
                                           ('About', lambda component, verb: self._about_dialog.show())])
        self._applet.add(self._status_button)
        
        # Remove padding around button contents.
        force_no_focus_padding(self._status_button)
        
        # Fix bug in which button would not propogate middle-clicks
        # and right-clicks to the applet.
        self._status_button.connect('button-press-event', on_widget_button_press_event)
        
        self._status_button.set_relief(gtk.RELIEF_NONE)
        self._status_button.set_icon(config.ICON_PATH);
        
        self._connect_signals()
        self._update_status_button()
        self._update_popup_menu()
        self._update_preferences_dialog()
        self._status_button.show()
        self._applet.show()
    
    def _connect_signals(self):
        self._applet.connect('change-orient', lambda applet, orientation: self._update_status_button())
        self._applet.connect('change-size', lambda applet, size: self._update_status_button())
        self._applet.connect('change-background', self._on_applet_change_background)
        self._applet.connect('destroy', self._on_applet_destroy)
        
        self._presets_store.get_model().connect('row-deleted', lambda model, row_path: self._update_popup_menu())
        self._presets_store.get_model().connect('row-changed', lambda model, row_path, row_iter: self._update_popup_menu())
        
        self._timer.connect('time-changed', self._on_timer_time_changed)
        self._timer.connect('state-changed', self._on_timer_state_changed)
        self._status_button.connect('clicked', self._on_status_button_clicked)
        self._start_timer_dialog.connect('clicked-start',
                                         self._on_start_dialog_clicked_start)
        self._start_timer_dialog.connect('clicked-manage-presets',
                                         self._on_start_dialog_clicked_manage_presets)
        self._start_timer_dialog.connect('clicked-save',
                                         self._on_start_dialog_clicked_save)
        self._start_timer_dialog.connect('clicked-preset',
                                         self._on_start_dialog_clicked_preset)
        
        self._preferences_dialog.connect('show-remaining-time-changed', self._on_prefs_show_time_changed)
        self._preferences_dialog.connect('play-sound-changed', self._on_prefs_play_sound_changed)
        self._preferences_dialog.connect('use-custom-sound-changed', self._on_prefs_use_custom_sound_changed)
        self._preferences_dialog.connect('custom-sound-path-changed', self._on_prefs_custom_sound_path_changed)
        
        self._about_dialog.connect('delete-event', gtk.Widget.hide_on_delete)
        self._about_dialog.connect('response', lambda dialog, response_id: self._about_dialog.hide())

        self._gconf.add_notification(TimerApplet._SHOW_REMAINING_TIME_KEY, self._on_gconf_changed)
        self._gconf.add_notification(TimerApplet._PLAY_SOUND_KEY, self._on_gconf_changed)
        self._gconf.add_notification(TimerApplet._USE_CUSTOM_SOUND_KEY, self._on_gconf_changed)
        self._gconf.add_notification(TimerApplet._CUSTOM_SOUND_PATH_KEY, self._on_gconf_changed)
    
    ## Private methods for updating UI ##
    
    def _update_status_button(self):
        current_state = self._timer.get_state()
        if current_state == core.Timer.STATE_IDLE:
            print 'Idle'
            # This label text should not be visible because the label
            # is hidden when the timer is idle.
            self._status_button.set_label('--:--:--')
            self._status_button.set_tooltip(_('Click to start a new timer countdown.'))
        elif current_state == core.Timer.STATE_RUNNING:
            print 'Running'
        elif current_state == core.Timer.STATE_PAUSED:
            print 'Paused'
            self._status_button.set_tooltip(_('Paused. Click to continue timer countdown.'))
        elif current_state == core.Timer.STATE_FINISHED:
            print 'Finished'
            self._status_button.set_label(_('Finished'))
            name_str = self._timer.get_name()
            time_str = get_display_text_from_datetime(self._timer.get_end_time())
            if len(name_str) > 0:
                # "<timer name>" finished at <time>
                self._status_button.set_tooltip(_('"%s" finished at %s.\nClick to stop timer.') % (name_str, time_str))
            else:
                # Timer finished at <time>
                self._status_button.set_tooltip(_('Timer finished at %s.\nClick to stop timer.') % time_str)
        
        self._status_button.set_sensitized(current_state == core.Timer.STATE_RUNNING or
                                           current_state == core.Timer.STATE_FINISHED)
        self._status_button.set_use_icon(current_state == core.Timer.STATE_IDLE)
        self._status_button.set_show_remaining_time(current_state != core.Timer.STATE_IDLE and
                                                    self._gconf.get_bool(TimerApplet._SHOW_REMAINING_TIME_KEY))
        
        if current_state == core.Timer.STATE_PAUSED:
            self._status_button.set_pie_fill_color(0.4, 0.4, 0.4)
        else:
            # Use theme color
            color = self._applet.style.base[gtk.STATE_SELECTED]
            red = color.red / 65535.0
            green = color.green / 65535.0
            blue = color.blue / 65535.0
            self._status_button.set_pie_fill_color(red, green, blue)
        
        orientation = self._applet.get_orient()
        size = self._applet.get_size()
        use_vertical = (orientation == gnomeapplet.ORIENT_LEFT or
                        orientation == gnomeapplet.ORIENT_RIGHT or
                        size >= gnomeapplet.SIZE_MEDIUM)
        self._status_button.set_use_vertical_layout(use_vertical)
    
    def _update_popup_menu(self):
        popup = self._applet.get_popup_component()
        
        timer_state = self._timer.get_state()
        show_pause = (timer_state == core.Timer.STATE_RUNNING)
        show_continue = (timer_state == core.Timer.STATE_PAUSED)
        show_stop = (timer_state == core.Timer.STATE_RUNNING or
                     timer_state == core.Timer.STATE_PAUSED or
                     timer_state == core.Timer.STATE_FINISHED)
        show_restart = (timer_state == core.Timer.STATE_RUNNING or
                        timer_state == core.Timer.STATE_PAUSED or
                        timer_state == core.Timer.STATE_FINISHED)
        
        show_presets_menu = (len(self._presets_store.get_model()) > 0)
        show_separator = (
            show_presets_menu or
            show_pause or
            show_continue or
            show_stop or
            show_restart)
        
        to_hidden_str = lambda show: ('0', '1')[not show]
        popup.set_prop('/commands/PauseTimer', 'hidden', to_hidden_str(show_pause))
        popup.set_prop('/commands/ContinueTimer', 'hidden', to_hidden_str(show_continue))
        popup.set_prop('/commands/StopTimer', 'hidden', to_hidden_str(show_stop))
        popup.set_prop('/commands/RestartTimer', 'hidden', to_hidden_str(show_restart))
        popup.set_prop(TimerApplet._PRESETS_PATH, 'hidden', to_hidden_str(show_presets_menu))
        popup.set_prop('/popups/popup/Separator1', 'hidden', to_hidden_str(show_separator))
        
        # Rebuild the Presets submenu
        if popup.path_exists(TimerApplet._PRESETS_PLACEHOLDER_PATH):
            popup.rm(TimerApplet._PRESETS_PLACEHOLDER_PATH)
        popup.set_translate(TimerApplet._PRESETS_PATH,
                            '<placeholder name="%s"/>' % TimerApplet._PRESETS_PLACEHOLDER_NAME)
        
        preset_number = 1
        row_iter = self._presets_store.get_model().get_iter_first()
        while row_iter is not None:
            verb = ('Preset_%d' % preset_number)
            preset_number += 1
            display_text = utils.get_preset_display_text(self._presets_store, row_iter)
            node_xml = '<menuitem verb="%s" name="%s" label="%s"/>' % (verb, verb, display_text)
            popup.set_translate(TimerApplet._PRESETS_PLACEHOLDER_PATH, node_xml)
            popup.add_verb(verb,
                           self._on_presets_submenu_item_activated,
                           self._presets_store.get_model().get_path(row_iter))
            row_iter = self._presets_store.get_model().iter_next(row_iter)
    
    def _update_preferences_dialog(self):
        self._preferences_dialog.props.show_remaining_time = \
            self._gconf.get_bool(TimerApplet._SHOW_REMAINING_TIME_KEY)
        self._preferences_dialog.props.play_sound = \
            self._gconf.get_bool(TimerApplet._PLAY_SOUND_KEY)
        self._preferences_dialog.props.use_custom_sound = \
            self._gconf.get_bool(TimerApplet._USE_CUSTOM_SOUND_KEY)
        self._preferences_dialog.props.custom_sound_path = \
            self._gconf.get_string(TimerApplet._CUSTOM_SOUND_PATH_KEY)
    
    ## Applet callbacks ##
    
    def _on_applet_change_background(self, applet, background_type, color, pixmap):
        applet.set_style(None)
        rc_style = gtk.RcStyle()
        applet.modify_style(rc_style)
        
        if background_type == gnomeapplet.NO_BACKGROUND:
            pass
        elif background_type == gnomeapplet.COLOR_BACKGROUND:
            applet.modify_bg(gtk.STATE_NORMAL, color)
        elif background_type == gnomeapplet.PIXMAP_BACKGROUND:
            style = applet.style.copy()
            style.bg_pixmap[gtk.STATE_NORMAL] = pixmap
            applet.set_style(style)
    
    def _on_applet_destroy(self, sender, data=None):
        self._notifier.end()
        if self._timer.get_state() != core.Timer.STATE_IDLE:
            self._timer.reset() # will stop timeout
        self._gconf.delete()
        
    ## Popup menu callbacks ##
        
    def _on_presets_submenu_item_activated(self, component, verb, row_path):
        # Try hiding the Start Timer dialog, just in case it's open.
        self._start_timer_dialog.hide()
        row_iter = self._presets_store.get_model().get_iter(row_path)
        (name, hours, minutes, seconds) = self._presets_store.get_preset(row_iter)
        self._start_timer_with_settings(name, hours, minutes, seconds)
    
    ## GConf callbacks ##
    
    def _on_gconf_changed(self, gconf_value, data=None):
        self._update_status_button()
        self._update_preferences_dialog()
    
    ## PreferencesDialog callbacks ##
    
    def _on_prefs_show_time_changed(self, sender, show_time):
        self._gconf.set_bool(TimerApplet._SHOW_REMAINING_TIME_KEY, show_time)
        
    def _on_prefs_play_sound_changed(self, sender, play_sound):
        self._gconf.set_bool(TimerApplet._PLAY_SOUND_KEY, play_sound)
        
    def _on_prefs_use_custom_sound_changed(self, sender, use_custom_sound):
        self._gconf.set_bool(TimerApplet._USE_CUSTOM_SOUND_KEY, use_custom_sound)
        
    def _on_prefs_custom_sound_path_changed(self, sender, custom_sound_path):
        self._gconf.set_string(TimerApplet._CUSTOM_SOUND_PATH_KEY, custom_sound_path)
    
    ## Timer callbacks ##
    
    def _on_timer_time_changed(self, timer):
        hours, minutes, seconds = utils.seconds_to_hms(timer.get_remaining_time())
        print 'Remaining time: %d, %d, %d' % (hours, minutes, seconds)
        name = self._timer.get_name()
        self._status_button.set_label(construct_time_str(self._timer.get_remaining_time(),
                                                         show_all=False))
        fraction_remaining = float(self._timer.get_remaining_time()) / self._timer.get_duration()
        self._status_button.set_progress(1.0 - fraction_remaining)
        if len(name) > 0:
            # HH:MM:SS (<timer name>)
            self._status_button.set_tooltip(_('%02d:%02d:%02d (%s)') % (hours, minutes, seconds, name))
        else:
            # HH:MM:SS
            self._status_button.set_tooltip(_('%02d:%02d:%02d') % (hours, minutes, seconds))
    
    def _on_timer_state_changed(self, timer, data=None):
        print 'State changed'
        new_state = timer.get_state()
        
        # These actions should be done once upon a state change.
        # That's why they're done here and not in self._update_status_button();
        # self._update_status_button() could be called multiple times
        # while in the same state.
        if new_state == core.Timer.STATE_FINISHED:    
            name = self._timer.get_name()
            end_time = self._timer.get_end_time()
            time_text = get_display_text_from_datetime(end_time)
            summary = None
            message = None
            if len(name) > 0:
                # "<timer name>" Finished
                summary = (_('"%s" Finished') % name)
                
                # "<timer name>" finished at <time>
                message = (_('"%s" finished at %s') % (name, time_text))
            else:
                summary = _('Timer Finished')
            
                # Timer finished at <time>
                message = (_('Timer finished at %s') % time_text)
            
            
            def reminder_message_func():
                elapsed_time = datetime.now() - end_time
                message = None
                if elapsed_time < timedelta(seconds=60):
                    message = ngettext('Timer finished about <b>%d second</b> ago',
                                       'Timer finished about <b>%d seconds</b> ago',
                                       elapsed_time.seconds) % elapsed_time.seconds
                else:
                    minutes = elapsed_time.seconds / 60
                    message = ngettext('Timer finished about <b>%d minute</b> ago',
                                       'Timer finished about <b>%d minutes</b> ago',
                                       minutes) % minutes
                return message
                    
            self._notifier.begin(summary, message, reminder_message_func)
            
            self._start_pulsing_button()
            self._play_notification_sound()
            
            if self._gconf.get_bool('play_beep'):
                print 'Playing beep...'
                gdk.beep()
                print 'Done playing beep.'
        else:
            self._notifier.end()
            self._stop_pulsing_button()
        
        self._update_status_button()
        self._update_popup_menu()
    
    ## StatusButton callbacks ##
    
    def _on_status_button_clicked(self, button, data=None):
        current_state = self._timer.get_state()
        if current_state == core.Timer.STATE_IDLE:
            self._start_timer_dialog.show()
        elif current_state == core.Timer.STATE_FINISHED:
            self._timer.reset()
        elif current_state == core.Timer.STATE_PAUSED:
            # Temporarily disable status button while the Continue dialog is open.
            self._status_button.props.sensitive = False
            dialog_result = self._continue_dialog.get_response()
            self._status_button.props.sensitive = True
            if dialog_result == ui.ContinueTimerDialog.CONTINUE_TIMER:
                self._timer.start()
            elif dialog_result == ui.ContinueTimerDialog.STOP_TIMER:
                self._timer.reset()
            elif dialog_result == ui.ContinueTimerDialog.KEEP_PAUSED:
                pass
            else:
                assert False
        elif current_state == core.Timer.STATE_RUNNING:
            self._timer.stop()
    
    ## StartTimerDialog callbacks ##
    
    def _on_start_dialog_clicked_start(self, sender, data=None):
        (name, hours, minutes, seconds) = self._start_timer_dialog.get_name_and_duration()
        self._start_timer_with_settings(name, hours, minutes, seconds)
    
    def _on_start_dialog_clicked_manage_presets(self, sender, data=None):
        self._manage_presets_dialog.show()
    
    def _on_start_dialog_clicked_save(self, sender, name,
                                      hours, minutes, seconds, data=None):
        self._presets_store.add_preset(name, hours, minutes, seconds)
        
    def _on_start_dialog_clicked_preset(self, sender, row_path, data=None):
        row_iter = self._presets_store.get_model().get_iter(row_path)
        (name, hours, minutes, seconds) = self._presets_store.get_preset(row_iter)
        self._start_timer_dialog.set_name_and_duration(name, hours, minutes, seconds)
        
    ## Private methods ##
    
    def _start_timer_with_settings(self, name, hours, minutes, seconds):
        if self._timer.get_state() != core.Timer.STATE_IDLE:
            self._timer.reset()
        self._timer.set_duration(utils.hms_to_seconds(hours, minutes, seconds))
        self._timer.set_name(name)
        self._timer.start()
        
    def _restart_timer(self):
        self._timer.reset()
        self._timer.start()
        
    def _play_notification_sound(self):
        if not self._gconf.get_bool(TimerApplet._PLAY_SOUND_KEY):
            return
            
        sound_path = config.DEFAULT_SOUND_PATH
        if self._gconf.get_bool(TimerApplet._USE_CUSTOM_SOUND_KEY):
            sound_path = self._gconf.get_string(TimerApplet._CUSTOM_SOUND_PATH_KEY)
            
        print 'Playing notification sound: "%s"' % str(sound_path)
        gstplay(sound_path)
        print 'Done playing sound.'
    
    def _start_pulsing_button(self):
        self._status_button.start_pulsing()
        
    def _stop_pulsing_button(self):
        self._status_button.stop_pulsing()
        
    def _show_about_dialog(self):
        self._about_dialog.run()
        self._about_dialog.hide()