#!bin/python
"""
live web display of all existing subs with pictures, mainly for
dragging them into CC
"""
from run_local import log
import sys, optparse, logging, json, subprocess, datetime
from dateutil.tz import tzlocal
from twisted.internet import reactor, defer
import cyclone.web, cyclone.httpclient, cyclone.websocket
from rdflib import RDF, URIRef, Literal
import pyjade.utils
from light9.rdfdb.syncedgraph import SyncedGraph
from light9.rdfdb.patch import Patch
from light9.namespaces import L9, DCTERMS
from light9 import networking, showconfig

from lib.cycloneerr import PrettyErrorHandler
        
liveClients = set()
def sendToLiveClients(d=None, asJson=None):
    j = asJson or json.dumps(d)
    for c in liveClients:
        c.sendMessage(j)

class Live(cyclone.websocket.WebSocketHandler):
    def connectionMade(self, *args, **kwargs):
        log.info("websocket opened")
        liveClients.add(self)
        self.settings.onNewClient()

    def connectionLost(self, reason):
        log.info("websocket closed")
        liveClients.remove(self)

    def messageReceived(self, message):
        log.info("got message %s" % message)
        self.sendMessage(message)
        
class Static(PrettyErrorHandler, cyclone.web.StaticFileHandler):
    def get(self, path, *args, **kw):
        if path in ['', 'chases']:
            return self.respondStaticJade("light9/subserver/%s.jade" %
                                          (path or 'index'))
            
        if path.endswith(".js"):
            return self.responseStaticCoffee(
                'light9/subserver/%s' %
                path.replace(".js", ".coffee")) # potential security hole

        cyclone.web.StaticFileHandler.get(self, path, *args, **kw)

    def respondStaticJade(self, src):
        html = pyjade.utils.process(open(src).read())
        self.write(html)

    def responseStaticCoffee(self, src):
        self.write(subprocess.check_output([
            '/usr/bin/coffee', '--compile', '--print', src]))

class Snapshot(PrettyErrorHandler, cyclone.web.RequestHandler):
    @defer.inlineCallbacks
    def post(self):
        about = URIRef(self.get_argument("about"))
        response = yield cyclone.httpclient.fetch(networking.vidref.path("snapshot"), method="POST", timeout=1)

        snapUri = URIRef(json.loads(response.body)['snapshot'])
        # vidref could write about when it was taken, etc. would it be
        # better for us to tell vidref where to attach the result in
        # the graph, and then it doesn't even have to return anything?

        ctx = showconfig.showUri() + "/snapshots"
        
        self.settings.graph.patch(Patch(addQuads=[
            (about, L9['image'], snapUri, ctx),
            (snapUri, DCTERMS['created'],
             Literal(datetime.datetime.now(tzlocal())), ctx),
            ]))
        
        self.write(json.dumps({'snapshot': snapUri}))

def newestImage(subject):
    newest = (None, None)
    for img in graph.objects(subject, L9['image']):
        created = graph.value(img, DCTERMS['created'])
        if created > newest[0]:
            newest = (created, img)
    return newest[1]
        
if __name__ == "__main__":
    parser = optparse.OptionParser()
    parser.add_option("-v", "--verbose", action="store_true",
                      help="logging.DEBUG")
    (options, args) = parser.parse_args()

    log.setLevel(logging.DEBUG if options.verbose else logging.INFO)

    graph = SyncedGraph("subserver")

    d = {}
    def updateSubs():
        subs = []
        for sub in sorted(graph.subjects(RDF.type, L9['Submaster'])):
            rec = {'uri' : sub}
            rec['isLocal'] = graph.contains((sub, RDF.type,
                                             L9['LocalSubmaster']))
            rec['label'] = graph.label(sub)
            rec['img'] = newestImage(sub)
            subs.append(rec)
        
        d.clear()
        d.update({'subs': subs})

        d['chases'] = []
        for chase in sorted(graph.subjects(RDF.type, L9['Chase'])):
            fakeLabel = chase.rsplit('/', 1)[-1]
            d['chases'].append({
                'uri': chase,
                'label': fakeLabel,
            })
        
        sendToLiveClients(d=d)
    def onNewClient():
        sendToLiveClients(d=d)
        
    graph.addHandler(updateSubs)
    
    
    port = 8052
    reactor.listenTCP(port, cyclone.web.Application(handlers=[
        (r'/live', Live),
        (r'/snapshot', Snapshot),
        (r'/static/(.*)', cyclone.web.StaticFileHandler, {'path': 'static/'}),
        (r'/(.*)', Static,
         {"path" : "light9/subserver",
          "default_filename" : "index.jade"}),
        ], debug=True, graph=graph, onNewClient=onNewClient))
    log.info("serving on %s" % port)
    reactor.run()