#!bin/python

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, json, itertools
from rdflib import URIRef, Literal

from light9 import networking, showconfig
from light9.effecteval.effect import EffectNode
from light9.effect.edit import getMusicStatus, songNotePatch
from light9.effecteval.effectloop import makeEffectLoop
from greplin.scales.cyclonehandler import StatsHandler
from light9.namespaces import L9
from rdfdb.patch import Patch
from rdfdb.syncedgraph import SyncedGraph
from greplin import scales
from standardservice.scalessetup import gatherProcessStats

from cycloneerr import PrettyErrorHandler
from light9.coffee import StaticCoffee

gatherProcessStats()


class EffectEdit(PrettyErrorHandler, cyclone.web.RequestHandler):

    def get(self):
        self.set_header('Content-Type', 'text/html')
        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),
            ]))


@inlineCallbacks
def currentSong():
    s = (yield getMusicStatus())['song']
    if s is None:
        raise ValueError("no current song")
    returnValue(URIRef(s))


class SongEffects(PrettyErrorHandler, cyclone.web.RequestHandler):

    def wideOpenCors(self):
        self.set_header('Access-Control-Allow-Origin', '*')
        self.set_header('Access-Control-Allow-Methods',
                        'GET, PUT, POST, DELETE, OPTIONS')
        self.set_header('Access-Control-Max-Age', '1000')
        self.set_header('Access-Control-Allow-Headers',
                        'Content-Type, Authorization, X-Requested-With')

    def options(self):
        self.wideOpenCors()
        self.write('')

    @inlineCallbacks
    def post(self):
        self.wideOpenCors()
        dropped = URIRef(self.get_argument('drop'))

        try:
            song = URIRef(self.get_argument('uri'))
        except Exception:  # which?
            song = yield currentSong()

        event = self.get_argument('event', default='default')

        note = self.get_argument('note', default=None)
        if note is not None:
            note = URIRef(note)

        log.info("adding to %s", song)
        note, p = yield songNotePatch(self.settings.graph,
                                      dropped,
                                      song,
                                      event,
                                      ctx=song,
                                      note=note)

        self.settings.graph.patch(p)
        self.settings.graph.suggestPrefixes(song, {'song': URIRef(song + '/')})
        self.write(json.dumps({'note': note}))


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), 'effects': []})
            seen = set()
            for n in self.graph.objects(s, L9['note']):
                for uri in self.graph.objects(n, L9['effectClass']):
                    if uri in seen:
                        continue
                    seen.add(uri)
                    out[-1]['effects'].append({
                        'uri': uri,
                        'label': self.graph.label(uri)
                    })
            out[-1]['effects'].sort(key=lambda e: e['uri'])

        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

        # EffectNode knows how to put them in order. Somehow this is
        # not triggering an update when the order changes.
        en = EffectNode(self.graph, self.uri)
        codeLines = [c.code for c in en.codes]
        self.sendMessage({'codeLines': codeLines})

    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 received on PUT /code")
            return
        with self.settings.graph.currentState(tripleFilter=(None, L9['effect'],
                                                            effect)) as g:
            song = next(g.subjects(L9['effect'], effect))

        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)  # noqa
        raise NotImplementedError
        self.write(maxDict(effectDmxDict(e) for e in effects))  # noqa
        # return dmx dict for all effects in the song, already combined


class App(object):

    def __init__(self, show, outputWhere):
        self.show = show
        self.outputWhere = outputWhere
        self.graph = SyncedGraph(networking.rdfdb.url, "effectEval")
        self.graph.initiallySynced.addCallback(self.launch).addErrback(
            log.error)

        self.stats = scales.collection(
            '/',
            scales.PmfStat('sendLevels', recalcPeriod=1),
            scales.PmfStat('getMusic', recalcPeriod=1),
            scales.PmfStat('evals', recalcPeriod=1),
            scales.PmfStat('sendOutput', recalcPeriod=1),
            scales.IntStat('errors'),
        )

    def launch(self, *args):
        log.info('launch')
        if self.outputWhere:
            self.loop = makeEffectLoop(self.graph, self.stats, self.outputWhere)
            self.loop.startLoop()

        SFH = cyclone.web.StaticFileHandler
        self.cycloneApp = cyclone.web.Application(handlers=[
            (r'/()', SFH, {
                'path': 'light9/effecteval',
                'default_filename': 'index.html'
            }),
            (r'/effect', EffectEdit),
            (r'/effect\.js', StaticCoffee, {
                'src': 'light9/effecteval/effect.coffee'
            }),
            (r'/(effect-components\.html)', SFH, {
                'path': 'light9/effecteval'
            }),
            (r'/effectUpdates', EffectUpdates),
            (r'/code', Code),
            (r'/songEffectsUpdates', SongEffectsUpdates),
            (r'/effect/eval', EffectEval),
            (r'/songEffects', SongEffects),
            (r'/songEffects/eval', SongEffectsEval),
            (r'/stats/(.*)', StatsHandler, {
                'serverName': 'effecteval'
            }),
        ],
                                                  debug=True,
                                                  graph=self.graph,
                                                  stats=self.stats)
        reactor.listenTCP(networking.effectEval.port, self.cycloneApp)
        log.info("listening on %s" % networking.effectEval.port)


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")
    parser.add_option("--output", metavar="WHERE", help="dmx or leds")
    (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), options.output)
    if options.twistedlog:
        from twisted.python import log as twlog
        twlog.startLogging(sys.stderr)
    reactor.run()