#!bin/python
from __future__ import division
from run_local import log
from twisted.internet import reactor
from twisted.internet.defer import inlineCallbacks, returnValue
import cyclone.web, cyclone.websocket, cyclone.httpclient
import sys, optparse, logging, subprocess, json, time, traceback, itertools
from rdflib import URIRef, Literal

sys.path.append(".")
from light9 import networking, showconfig, Submaster, dmxclient
from light9.curvecalc.curve import CurveResource
from light9.effecteval.effect import EffectNode
from light9.effecteval.effectloop import EffectLoop
from light9.greplin_cyclone import StatsForCyclone
from light9.namespaces import L9, RDF, RDFS
from light9.rdfdb.patch import Patch
from light9.rdfdb.syncedgraph import SyncedGraph
from greplin import scales

from lib.cycloneerr import PrettyErrorHandler

class EffectEdit(PrettyErrorHandler, cyclone.web.RequestHandler):
    def get(self):
        self.write(open("light9/effecteval/effect.html").read())
    def delete(self):
        graph = self.settings.graph
        uri = URIRef(self.get_argument('uri'))
        with graph.currentState(tripleFilter=(None, L9['effect'], uri)) as g:
            song = ctx = list(g.subjects(L9['effect'], uri))[0]
        self.settings.graph.patch(Patch(delQuads=[
            (song, L9['effect'], uri, ctx),
            ]))
        
class SongEffects(PrettyErrorHandler, cyclone.web.RequestHandler):
    def post(self):
        song = URIRef(self.get_argument('uri'))
        dropped = URIRef(self.get_argument('drop'))
        ctx = song
        graph = self.settings.graph
        effect = graph.sequentialUri(song + "/effect-")
        quads = [
            (song, L9['effect'], effect, ctx),
            (effect, RDF.type, L9['Effect'], ctx),
        ]

        with graph.currentState(
                tripleFilter=(dropped, None, None)) as g:
            droppedTypes = g.objects(dropped, RDF.type)
            droppedLabel = g.label(dropped)
            droppedCodes = g.objects(dropped, L9['code'])

        if L9['EffectClass'] in droppedTypes:
            quads.extend([
                (effect, RDFS.label, droppedLabel, ctx),
                (effect, RDF.type, dropped, ctx),
                ] + [(effect, L9['code'], c, ctx) for c in droppedCodes])
        elif L9['Curve'] in droppedTypes:
            curve = graph.sequentialUri(song + "/curve-")
            cr = CurveResource(graph, curve)
            cr.newCurve(ctx, label=Literal('sub %s' % droppedLabel))
            cr.saveCurve()
            quads.extend([
                (song, L9['curve'], curve, ctx),                
                (effect, L9['code'],
                 Literal('out = %s * %s' % (dropped.n3(), curve.n3())),
                 ctx),
                ])
        else:
            raise NotImplementedError(
                "don't know how to add an effect from %r (types=%r)" %
                (dropped, droppedTypes))
            
        graph.patch(Patch(addQuads=quads))
        
class SongEffectsUpdates(cyclone.websocket.WebSocketHandler):
    def connectionMade(self, *args, **kwargs):
        self.graph = self.settings.graph
        self.graph.addHandler(self.updateClient)
        
    def updateClient(self):
        # todo: abort if client is gone
        playlist = self.graph.value(showconfig.showUri(), L9['playList'])
        songs = list(self.graph.items(playlist))
        out = []
        for s in songs:
            out.append({'uri': s, 'label': self.graph.label(s)})
            out[-1]['effects'] = [{'uri': uri} for uri in sorted(self.graph.objects(s, L9['effect']))]
        self.sendMessage({'songs': out})
        
        
class EffectUpdates(cyclone.websocket.WebSocketHandler):
    """
    stays alive for the life of the effect page
    """
    def connectionMade(self, *args, **kwargs):
        log.info("websocket opened")
        self.uri = URIRef(self.get_argument('uri'))
        self.sendMessage({'hello': repr(self)})

        self.graph = self.settings.graph
        self.graph.addHandler(self.updateClient)

    def updateClient(self):
        # todo: if client has dropped, abort and don't get any more
        # graph updates
        self.sendMessage({'codeLines':
                          list(self.graph.objects(self.uri, L9['code']))})
        
    def connectionLost(self, reason):
        log.info("websocket closed")

    def messageReceived(self, message):
        log.info("got message %s" % message)
        # write a patch back to the graph

def replaceObjects(graph, c, s, p, newObjs):
    patch = graph.getObjectPatch(
        context=c,
        subject=s,
        predicate=p,
        newObject=newObjs[0])

    moreAdds = []
    for line in newObjs[1:]:
        moreAdds.append((s, p, line, c))
    fullPatch = Patch(delQuads=patch.delQuads,
                      addQuads=patch.addQuads + moreAdds)
    graph.patch(fullPatch)

        
class Code(PrettyErrorHandler, cyclone.web.RequestHandler):
    def put(self):
        effect = URIRef(self.get_argument('uri'))
        codeLines = []
        for i in itertools.count(0):
            k = 'codeLines[%s][text]' % i
            v = self.get_argument(k, None)
            if v is not None:
                codeLines.append(Literal(v))
            else:
                break
        if not codeLines:
            log.info("no codelines recevied on PUT /code")
            return
        with self.settings.graph.currentState(
                tripleFilter=(None, L9['effect'], effect)) as g:
            song = g.subjects(L9['effect'], effect).next()
            
        replaceObjects(self.settings.graph, song, effect, L9['code'], codeLines)
            
        # right here we could tell if the code has a python error and return it
        self.send_error(202)
        
class EffectEval(PrettyErrorHandler, cyclone.web.RequestHandler):
    @inlineCallbacks
    def get(self):
        # return dmx list for that effect
        uri = URIRef(self.get_argument('uri'))
        response = yield cyclone.httpclient.fetch(
            networking.musicPlayer.path('time'))
        songTime = json.loads(response.body)['t']

        node = EffectNode(self.settings.graph, uri)
        outSub = node.eval(songTime)
        self.write(json.dumps(outSub.get_dmx_list()))


# Completely not sure where the effect background loop should
# go. Another process could own it, and get this request repeatedly:
class SongEffectsEval(PrettyErrorHandler, cyclone.web.RequestHandler):
    def get(self):
        song = URIRef(self.get_argument('song'))
        effects = effectsForSong(self.settings.graph, song)
        raise NotImplementedError
        self.write(maxDict(effectDmxDict(e) for e in effects))
        # return dmx dict for all effects in the song, already combined

class App(object):
    def __init__(self, show):
        self.show = show
        self.graph = SyncedGraph("effectEval")
        self.graph.initiallySynced.addCallback(self.launch)

        self.stats = scales.collection('/',
                                       scales.PmfStat('sendLevels'),
                                       scales.PmfStat('getMusic'),
                                       scales.PmfStat('writeDmx'),
                                       scales.IntStat('errors'),
                                       )

    def launch(self, *args):
        self.loop = EffectLoop(self.graph, self.stats)
        
        SFH = cyclone.web.StaticFileHandler
        self.cycloneApp = cyclone.web.Application(handlers=[
            (r'/()', SFH,
             {'path': 'light9/effecteval', 'default_filename': 'index.html'}),
            (r'/effect', EffectEdit),
            (r'/(websocket\.js)', SFH, {'path': 'light9/rdfdb/web/'}),
            (r'/effect\.js', StaticCoffee, {'src': 'light9/effecteval/effect.coffee'}),
            (r'/index\.js', StaticCoffee, {'src': 'light9/effecteval/index.coffee'}),
            (r'/effectUpdates', EffectUpdates),
            (r'/code', Code),
            (r'/songEffectsUpdates', SongEffectsUpdates),
            (r'/static/(.*)', SFH, {'path': 'static/'}),
            (r'/effect/eval', EffectEval),
            (r'/songEffects', SongEffects),
            (r'/songEffects/eval', SongEffectsEval),
            (r'/stats', StatsForCyclone),
        ], debug=True, graph=self.graph, stats=self.stats)
        reactor.listenTCP(networking.effectEval.port, self.cycloneApp)
        log.info("listening on %s" % networking.effectEval.port)
        
class StaticCoffee(PrettyErrorHandler, cyclone.web.RequestHandler):
    def initialize(self, src):
        super(StaticCoffee, self).initialize()
        self.src = src
    def get(self):
        self.set_header('Content-Type', 'application/javascript')
        self.write(subprocess.check_output([
            '/usr/bin/coffee', '--compile', '--print', self.src]))

        
if __name__ == "__main__":
    parser = optparse.OptionParser()
    parser.add_option('--show',
        help='show URI, like http://light9.bigasterisk.com/show/dance2008',
                      default=showconfig.showUri())
    parser.add_option("-v", "--verbose", action="store_true",
                      help="logging.DEBUG")
    parser.add_option("--twistedlog", action="store_true",
                      help="twisted logging")
    (options, args) = parser.parse_args()

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

    if not options.show:
        raise ValueError("missing --show http://...")
            
    app = App(URIRef(options.show))
    if options.twistedlog:
        from twisted.python import log as twlog
        twlog.startLogging(sys.stderr)
    reactor.run()