from __future__ import division

import random as random_mod

import math

import logging, colorsys

import light9.Submaster as Submaster

from chase import chase as chase_logic

import showconfig

from rdflib import RDF

from light9 import Patch

from light9.namespaces import L9

log = logging.getLogger()

registered = []

def register(f):

    registered.append(f)

    return f

@register

class Strip(object):

    """list of r,g,b tuples for sending to an LED strip"""

    which = 'L' # LR means both. W is the wide one

    pixels = []

    @classmethod

    def solid(cls, which='L', color=(1,1,1), hsv=None):

        """hsv overrides color"""

        if hsv is not None:

            color = colorsys.hsv_to_rgb(hsv[0] % 1.0, hsv[1], hsv[2])

        x = cls()

        x.which = which

        x.pixels = [tuple(color)] * 50

        return x

    def __mul__(self, f):

        if not isinstance(f, (int, float)):

            raise TypeError

        s = Strip()

        s.which = self.which

        s.pixels = [(r*f, g*f, b*f) for r,g,b in self.pixels]

        return s

    __rmul__ = __mul__

@register

class Blacklight(float):

    """a level for the blacklight PWM output"""

    def __mul__(self, f):

        return Blacklight(float(self) * f)

    __rmul__ = __mul__

@register

def chase(t, ontime=0.5, offset=0.2, onval=1.0, 

          offval=0.0, names=None, combiner=max, random=False):

    """names is list of URIs. returns a submaster that chases through

    the inputs"""

    if random:

        r = random_mod.Random(random)

        names = names[:]

        r.shuffle(names)

    chase_vals = chase_logic(t, ontime, offset, onval, offval, names, combiner)

    lev = {}

    for uri, value in chase_vals.items():

        try:

            dmx = Patch.dmx_from_uri(uri)

        except KeyError:

            log.info(("chase includes %r, which doesn't resolve to a dmx chan" %

                   uri))

            continue

        lev[dmx] = value

from __future__ import division

import time, json, logging, traceback

import numpy

import serial

from twisted.internet import reactor, threads

from twisted.internet.defer import inlineCallbacks, returnValue, succeed

from twisted.internet.error import TimeoutError

from rdflib import URIRef, Literal

import cyclone.httpclient

from light9.namespaces import L9, RDF, RDFS

from light9.effecteval.effect import EffectNode

from light9 import Effects

from light9 import networking

from light9 import Submaster

from light9 import dmxclient

from light9 import prof

log = logging.getLogger('effectloop')

class EffectLoop(object):

    """maintains a collection of the current EffectNodes, gets time from

    music player, sends dmx"""

    def __init__(self, graph, stats):

        self.graph, self.stats = graph, stats

        self.currentSong = None

        self.lastLogTime = 0

        self.lastLogMsg = ""

        self.lastErrorLog = 0

        self.graph.addHandler(self.setEffects)

        self.period = 1 / 30

        self.coastSecs = .3 # main reason to keep this low is to notice play/pause

        self.songTimeFetch = 0

        self.songIsPlaying = False

        self.songTimeFromRequest = 0

        self.requestTime = 0 # unix sec for when we fetched songTime

        self.initOutput()

    def initOutput(self):

        pass

    def startLoop(self):

        log.info("startLoop")

        self.lastSendLevelsTime = 0

        reactor.callLater(self.period, self.sendLevels)

        reactor.callLater(self.period, self.updateTimeFromMusic)

    def setEffects(self):

        self.currentEffects = []

        log.info('setEffects currentSong=%s', self.currentSong)

        if self.currentSong is None:

            return

        for effectUri in self.graph.objects(self.currentSong, L9['effect']):

            self.currentEffects.append(EffectNode(self.graph, effectUri))

        for sub in self.graph.subjects(RDF.type, L9['Submaster']):

            for effectUri in self.graph.objects(sub, L9['drivesEffect']):

                self.currentEffects.append(EffectNode(self.graph, effectUri))

        log.info('now we have %s effects', len(self.currentEffects))

    @inlineCallbacks

    def getSongTime(self):

        now = time.time()

        old = now - self.requestTime

        if old > self.coastSecs:

            try:

                response = json.loads((yield cyclone.httpclient.fetch(

                    networking.musicPlayer.path('time'), timeout=.5)).body)

            except TimeoutError:

                log.warning("TimeoutError: using stale time from %.1f ago", old)

            else:

                self.requestTime = now

                self.currentPlaying = response['playing']

                self.songTimeFromRequest = response['t']

                returnValue(

                    (response['t'], (response['song'] and URIRef(response['song']))))

        estimated = self.songTimeFromRequest

        if self.currentSong is not None and self.currentPlaying:

            estimated += now - self.requestTime

        returnValue((estimated, self.currentSong))

    @inlineCallbacks

    def updateTimeFromMusic(self):

        t1 = time.time()

        with self.stats.getMusic.time():

            self.songTime, song = yield self.getSongTime()

            self.songTimeFetch = time.time()

        if song != self.currentSong:

            self.currentSong = song

            # this may be piling on the handlers

            self.graph.addHandler(self.setEffects)

        elapsed = time.time() - t1

        reactor.callLater(max(0, self.period - elapsed), self.updateTimeFromMusic)

    def estimatedSongTime(self):

        now = time.time()

        t = self.songTime

        if self.currentPlaying:

            t += max(0, now - self.songTimeFetch)

        return t

    @inlineCallbacks

    def sendLevels(self):

        t1 = time.time()

        log.debug("time since last call: %.1f ms" % (1000 * (t1 - self.lastSendLevelsTime)))

        self.lastSendLevelsTime = t1

        try:

            with self.stats.sendLevels.time():

                if self.currentSong is not None:

                    log.debug('allEffectOutputs')

                    with self.stats.evals.time():

                        outputs = self.allEffectOutputs(self.estimatedSongTime())

                    log.debug('combineOutputs')

                    combined = self.combineOutputs(outputs)

                    self.logLevels(t1, combined)

                    log.debug('sendOutput')

                    with self.stats.sendOutput.time():

                        yield self.sendOutput(combined)

                elapsed = time.time() - t1

                dt = max(0, self.period - elapsed)

        except Exception:

            self.stats.errors += 1

            traceback.print_exc()

            dt = .5

        reactor.callLater(dt, self.sendLevels)

    def combineOutputs(self, outputs):

        """pick usable effect outputs and reduce them into one for sendOutput"""

        outputs = [x for x in outputs if isinstance(x, Submaster.Submaster)]

        out = Submaster.sub_maxes(*outputs)

        return out

    @inlineCallbacks

    def sendOutput(self, combined):

        dmx = combined.get_dmx_list()

        yield dmxclient.outputlevels(dmx, twisted=True)

    def allEffectOutputs(self, songTime):

        outputs = []

        for e in self.currentEffects:

            try:

                out = e.eval(songTime)

                if isinstance(out, (list, tuple)):

                    outputs.extend(out)

                else:

                    outputs.append(out)

            except Exception as exc:

                now = time.time()