#
# -*- coding: utf-8 -*-
#
# Implementazione del Widget per gestire il video
#
 
import pygtk, gtk, gst, cairo, threading, time
 
class GstPlayer(threading.Thread):
 
    def __init__(self, xid, video):
        threading.Thread.__init__(self)
        self.xid = xid
        self.video = video
 
        self.exit_required = False
        self.loading = False
 
        self.daemon = True
 
    def set_sink(self, sink):
        assert self.xid
        self.imagesink = sink
        self.imagesink.set_xwindow_id(self.xid)
 
    def on_sync_message(self, bus, message):
 
        if message.structure is None:
            return
        if message.structure.get_name() == 'prepare-xwindow-id':
            gtk.gdk.threads_enter()
 
            self.set_sink(message.src)
            message.src.set_property("force-aspect-ratio", True)
            gtk.gdk.threads_leave()
 
    def on_message(self, bus, message):
        if message.type == gst.MESSAGE_ERROR:
            err, debug = message.parse_error()
            print err, debug
        elif message.type == gst.MESSAGE_LATENCY:
            print message.parse_latency()
        elif message.type == gst.MESSAGE_BUFFERING:
            if message.parse_buffering() is 100:
                self.play()
                self.loading = False
 
 
    def is_loading(self):
        return self.loading
 
    def run(self):
        self.player = gst.element_factory_make("playbin", "player")
 
        self.player.set_property
        bus = self.player.get_bus()
        bus.enable_sync_message_emission()
        bus.add_signal_watch()
        bus.connect("sync-message::element", self.on_sync_message)
        bus.connect("message", self.on_message)
 
        self.loading = True
 
        self.player.set_property("uri", self.video)
 
        self.pause()
 
        while not self.exit_required:
            pass
 
        self.player.set_state(gst.STATE_NULL)
 
    def exit(self):
        self.player.set_state(gst.STATE_NULL)
        self.exit_required = True
 
    def pause(self):
        self.player.set_state(gst.STATE_PAUSED)
 
    def play(self):
        self.player.set_state(gst.STATE_PLAYING)
        self.loading = False
 
 
class VideoWidget(gtk.DrawingArea):
 
    def __init__(self):
 
        ## Creo la drawing area e la coloro
        ## di nero
        gtk.DrawingArea.__init__(self)
 
        self.set_size_request(240,240)
        self.unset_flags(gtk.DOUBLE_BUFFERED)
 
        ## Connetto l'expose-event
        self.connect("expose-event", self.colorize)
 
        self.playing = False
        self.player = None
 
 
    def colorize(self, widget, event):
        """Quando la finestra viene creata la coloriamo di
        nero. Poi sarà tutto lavoro per gstreamer"""
 
        ## Ci permettiamo di disegnare sopra il filmato
        ## se e solo se non c'è un filmato che sta andando! :)
 
        print self.playing
 
        if not self.playing:
            cr = self.window.cairo_create()
            ## Non facciamo lavoro extra e coloriamo solo ciò
            ## che è stato scoperto
            cr.rectangle(event.area.x, event.area.y,
                         event.area.width, event.area.height)
 
            cr.clip()
 
            width, height = self.window.get_size()
 
            cr.set_source_rgb(0,0,0)
            cr.rectangle(0,0,width,height)
            cr.fill()
 
            pixbuf = gtk.gdk.pixbuf_new_from_file("ui/rai_logo.png")
            x = pixbuf.get_width()
            y = pixbuf.get_height()
            cr.set_source_pixbuf(pixbuf,max((width-x)/2,0),max((height-y)/2,0))
 
 
            cr.rectangle(max((width - x)/2,0),max((height-y)/2,0),x,y)
            cr.fill()
 
            return
 
            cr.set_source_rgb(0.5,0,0)
            st = "RaiTV :)"
            cr.set_font_size(height/20)
            cr.select_font_face("Comic Sans MS")
            xbearing , ybearing, twidth, theight, xadvance, yadvance = cr.text_extents(st)
 
            cr.move_to(width/2 - twidth/2, 1.6*height/3 - theight/5)
            cr.show_text(st)
 
            cr.set_line_width(3)
            cr.move_to(width/2 - twidth/2 - 5 , 1.6* height/3)
            cr.rel_line_to(twidth + 10,0)
            cr.stroke()
 
 
    def load_video(self, uri):
        """Start video playing with the specified URI"""
        ## Stoppiamo ogni video
        if self.playing:
            self.stop()
 
        print " => Buono, video stoppati"
 
        self.player = GstPlayer(self.window.xid, uri)
        print " => Player creato"
        self.player.start()
        self.player.pause()
        print " => Player avviato"
        self.playing = True
 
 
        ## Aspettiamo 5 secondi
 
 
 
    def pause(self):
        self.player.pause()
 
    def stop(self):
        self.playing = False
        if self.player is not None:
            self.player.exit()
            self.player.join(2)
            if self.player.isAlive():
                print " => Ops, l'ho ucciso brutalmente"
                del self.player
 
        self.repaint()
 
    def repaint(self):
 
        width, height = self.window.get_size()
        self.queue_draw_area(0,0,width,height)
 
 
 
    def play(self):
        if self.player is not None:
            self.playing = True
            self.player.play()
 
 
 
 
    def reset(self):
        pass