#!/usr/bin/python
"""
return some rdf about the environment, e.g. the current time,
daytime/night, overall modes like 'maintenance mode', etc

"""
import sys, datetime, cyclone.web, logging
from docopt import docopt
from twisted.internet import reactor, task, defer
from dateutil.tz import tzlocal
from dateutil.relativedelta import relativedelta, FR
from rdflib import Namespace, Literal
from greplin import scales
from greplin.scales.cyclonehandler import StatsHandler
from patchablegraph import PatchableGraph, CycloneGraphEventsHandler, CycloneGraphHandler
from twilight import isWithinTwilight
from standardservice.logsetup import log, verboseLogging
from patch_cyclone import patch_sse
from rdfdoc import Doc
patch_sse()

ROOM = Namespace("http://projects.bigasterisk.com/room/")
DEV = Namespace("http://projects.bigasterisk.com/device/")

STATS = scales.collection('/root',
                          scales.PmfStat('update'),
)

class CycloneGraphEventsHandlerWithCors(CycloneGraphEventsHandler):
    def flush(self):
        self.set_header(b"Access-Control-Allow-Origin", b"*")
        return CycloneGraphEventsHandler.flush(self)


@STATS.update.time()
def update(masterGraph):
    stmt = lambda s, p, o: masterGraph.patchObject(ROOM.environment, s, p, o)

    now = datetime.datetime.now(tzlocal())

    stmt(DEV.environment, ROOM.localHour, Literal(now.hour))
    stmt(DEV.environment, ROOM.localTimeToMinute,
         Literal(now.strftime("%H:%M")))

    stmt(DEV.environment, ROOM.localTimeToSecond,
         Literal(now.strftime("%H:%M:%S")))

    stmt(DEV.environment, ROOM.localDayOfWeek,
         Literal(now.strftime("%A")))
    stmt(DEV.environment, ROOM.localMonthDay,
         Literal(now.strftime("%B %e")))
    stmt(DEV.environment, ROOM.localDate,
         Literal(now.strftime("%Y-%m-%d")))

    for offset in range(-12, 7):
        d = now.date() + datetime.timedelta(days=offset)
        if d == d + relativedelta(day=31, weekday=FR(-1)):
            stmt(DEV.calendar, ROOM.daysToLastFridayOfMonth, Literal(offset))

    stmt(DEV.calendar, ROOM.twilight,
         ROOM['withinTwilight'] if isWithinTwilight(now) else ROOM['daytime'])


def main():
    arg = docopt("""
    Usage: environment.py [options]

    -v                    Verbose
    """)
    verboseLogging(arg['-v'])

    masterGraph = PatchableGraph()

    class Application(cyclone.web.Application):
        def __init__(self):
            handlers = [
                (r"/()",
                 cyclone.web.StaticFileHandler,
                 {"path": ".", "default_filename": "index.html"}),
                (r'/graph/environment',
                 CycloneGraphHandler, {'masterGraph': masterGraph}),
                (r'/graph/environment/events',
                 CycloneGraphEventsHandlerWithCors, {'masterGraph': masterGraph}),
                (r'/doc', Doc), # to be shared
                (r'/stats/(.*)', StatsHandler, {'serverName': 'environment'}),
            ]
            cyclone.web.Application.__init__(self, handlers,
                                             masterGraph=masterGraph)
    task.LoopingCall(update, masterGraph).start(1)
    reactor.listenTCP(9075, Application())
    reactor.run()

if __name__ == '__main__':
    main()