#!/usr/bin/python

"""
todo: curveview should preserve more objects, for speed maybe

"""
from __future__ import division
import xmlrpclib,time,socket,sys,textwrap,math,glob
from bisect import bisect_left,bisect,bisect_right
import Tkinter as tk
from dispatch import dispatcher
from twisted.internet import reactor,tksupport
from twisted.web.xmlrpc import Proxy

sys.path.append("../light8")
import dmxclient
import Submaster
from TLUtility import make_attributes_from_args

from zoomcontrol import Zoomcontrol

class Curve:
    """curve does not know its name. see Curveset"""
    points = None # x-sorted list of (x,y)
    def __init__(self):
        self.points = []

    def load(self,filename):
        for line in file(filename):
            self.points.append(tuple([float(a) for a in line.split()]))
        self.points.sort()
        dispatcher.send("points changed",sender=self)

    def save(self,filename):
        f = file(filename,'w')
        for p in self.points:
            f.write("%s %s\n" % p)
        f.close()

    def eval(self,t):
        i = bisect_left(self.points,(t,None))-1

        if self.points[i][0]>t:
            return self.points[i][1]
        if i>=len(self.points)-1:
            return self.points[i][1]

        p1,p2 = self.points[i],self.points[i+1]
        frac = (t-p1[0])/(p2[0]-p1[0])
        y = p1[1]+(p2[1]-p1[1])*frac
        return y

    __call__=eval

class Curveview(tk.Canvas):
    def __init__(self,master,curve,**kw):
        self.curve=curve
        tk.Canvas.__init__(self,master,width=10,height=10,
                           relief='sunken',bd=1,
                           closeenough=5,**kw)
        self.selected_points=[] # idx of points being dragged
        self.update()
        self.bind("<Enter>",self.focus)
        dispatcher.connect(self.input_time,"input time")
        dispatcher.connect(self.update,"zoom changed")
        dispatcher.connect(self.update,"points changed",sender=self.curve)
        self.bind("<Configure>",self.update)
    def screen_from_world(self,p):
        start,end = self.zoom
        ht = self.winfo_height()
        return (p[0]-start)/(end-start)*self.winfo_width(), (ht-5)-p[1]*(ht-10)
    def world_from_screen(self,x,y):
        start,end = self.zoom
        ht = self.winfo_height()
        return x/self.winfo_width()*(end-start)+start, ((ht-5)-y)/(ht-10)
    
    def input_time(self,val):
        t=val
        pts = self.screen_from_world((val,0))+self.screen_from_world((val,1))
        self.delete('timecursor')
        self.create_line(*pts,**dict(width=2,fill='red',tags=('timecursor',)))
    def update(self,*args):

        self.zoom = dispatcher.send("zoom area")[0][1]
        cp = self.curve.points

        visible_x = (self.world_from_screen(0,0)[0],
                     self.world_from_screen(self.winfo_width(),0)[0])

        visleftidx = max(0,bisect_left(cp,(visible_x[0],None))-1)
        visrightidx = min(len(cp)-1,bisect_left(cp,(visible_x[1],None))+1)
                             
        visible_points = cp[visleftidx:visrightidx+1]
        
        self.delete('curve')
        linepts=[]
        for p in visible_points:
            linepts.extend(self.screen_from_world(p))
        if not linepts:
            return
        line = self.create_line(*linepts,**{'tags':'curve'})

        # canvas doesnt have keyboard focus, so i can't easily change the
        # cursor when ctrl is pressed
        #        def curs(ev):
        #            print ev.state
        #        self.bind("<KeyPress>",curs)
        #        self.bind("<KeyRelease-Control_L>",lambda ev: curs(0))
        self.tag_bind(line,"<Control-ButtonPress-1>",self.newpoint)

        self.dots = {} # idx : canvas rectangle

        if len(visible_points)<50: 
            for i,p in enumerate(visible_points):
                rad=3
                p = self.screen_from_world(p)
                dot = self.create_rectangle(p[0]-rad,p[1]-rad,p[0]+rad,p[1]+rad,
                                            outline='black',fill='blue',
                                            tags=('curve','point'))
                self.tag_bind(dot,"<ButtonPress-1>",
                              lambda ev,i=i: self.dotpress(ev,i))
                self.bind("<Motion>",
                          lambda ev,i=i: self.dotmotion(ev,i))
                self.bind("<ButtonRelease-1>",
                          lambda ev,i=i: self.dotrelease(ev,i))
                self.dots[i]=dot

            self.highlight_selected_dots()

    def newpoint(self,ev):
        cp = self.curve.points
        
        p = self.world_from_screen(ev.x,ev.y)
        i = bisect(cp,(p[0],None))

        self.unselect()
        cp.insert(i,p)
        self.update()

    def highlight_selected_dots(self):
        for i,d in self.dots.items():
            if i in self.selected_points:
                self.itemconfigure(d,fill='red')
            else:
                self.itemconfigure(d,fill='blue')
        
    def dotpress(self,ev,dotidx):
        self.selected_points=[dotidx]
        self.highlight_selected_dots()

    def dotmotion(self,ev,dotidx):
        cp = self.curve.points

        moved=0
        for idx in self.selected_points:
            x,y = self.world_from_screen(ev.x,ev.y)
            y = max(0,min(1,y))
            if idx>0 and x<=cp[idx-1][0]:
                continue
            if idx<len(cp)-1 and x>=cp[idx+1][0]:
                continue
            moved=1
            cp[idx] = (x,y)
        if moved:
            self.update()
    def unselect(self):
        self.selected_points=[]
        self.highlight_selected_dots()
        
    def dotrelease(self,ev,dotidx):
        self.unselect()
        
class Curveset:
    curves = None # curvename : curve
    def __init__(self):
        self.curves = {}
    def load(self,basename):
        """find all files that look like basename-curvename and add
        curves with their contents"""
        for filename in glob.glob("%s-*"%basename):
            curvename = filename[filename.rfind('-')+1:]
            c=Curve()
            c.load(filename)
            self.add_curve(curvename,c)            
    def save(self,basename):
        """writes a file for each curve with a name
        like basename-curvename"""
        for name,cur in self.curves.items():
            cur.save("%s-%s" % (basename,name))
    def add_curve(self,name,curve):
        self.curves[name] = curve
        dispatcher.send("add_curve",sender=self,name=name)
    def globalsdict(self):
        return self.curves.copy()

class Curvesetview(tk.Frame):
    curves = None # curvename : Curveview
    def __init__(self,master,curveset,**kw):
        self.curves = {}
        self.curveset = curveset
        tk.Frame.__init__(self,master,**kw)
        dispatcher.connect(self.add_curve,"add_curve",sender=self.curveset)
    def add_curve(self,name):
        f = tk.Frame(self,relief='raised',bd=1)
        f.pack(side='top',fill='both',exp=1)
        tk.Label(f,text="curve %r"%name).pack(side='left')
        cv = Curveview(f,self.curveset.curves[name])
        cv.pack(side='right',fill='both',exp=1)
        self.curves[name] = cv

class Music:
    def __init__(self):
        self.player=None # xmlrpc Proxy to player
        self.recenttime=0
        
    def current_time(self):
        """return deferred which gets called with the current time"""
        if self.player is None:
            self.player = Proxy("http://spot:8040")
            d = self.player.callRemote("songlength")
            d.addCallback(lambda l: dispatcher.send("max time",maxtime=l))
            d = self.player.callRemote("songname")
            d.addCallback(lambda n: dispatcher.send("songname",name=n))
        d = self.player.callRemote('gettime')
        def sendtime(t):
            dispatcher.send("input time",val=t)
            return t # pass along to the real receiver
        def error(e):
            pass#self.player=None
        d.addCallback(sendtime)
        return d
        
class Subexpr:
    curveset = None
    def __init__(self,curveset):
        self.curveset = curveset
        self.lasteval = None
        self.expr=""
    def eval(self,t):
        if self.expr=="":
            dispatcher.send("expr_error",sender=self,exc="no expr, using 0")
            return 0
        glo = self.curveset.globalsdict()
        glo['t'] = t
        try:
            self.lasteval = eval(self.expr,glo)
        except Exception,e:
            dispatcher.send("expr_error",sender=self,exc=e)
        else:
            dispatcher.send("expr_error",sender=self,exc="no errors")
        return self.lasteval

    def expr():
        doc = "python expression for level as a function of t, using curves"
        def fget(self):
            return self._expr
        def fset(self, value):
            self._expr = value
            dispatcher("expr_changed",sender=self)
        return locals()
    expr = property(**expr())

class Subexprview(tk.Frame):
    def __init__(self,master,se,**kw):
        self.subexpr=se
        tk.Frame.__init__(self,master,**kw)
        self.evar = tk.StringVar()
        e = self.ent = tk.Entry(master,textvariable=self.evar)
        e.pack(side='left',fill='both',exp=1)
        self.expr_changed()
        self.evar.trace_variable('w',self.evar_changed)
        dispatcher.connect(self.expr_changed,"expr_changed",
                           sender=self.subexpr)
        self.error = tk.Label(master)
        self.error.pack(side='left')
        dispatcher.connect(lambda exc: self.error.config(text=str(exc)),
                           "expr_error",sender=self.subexpr,weak=0)
    def expr_changed(self):
        if self.subexpr.expr!=self.evar.get():
            self.evar.set(self.subexpr.expr)
    def evar_changed(self,*args):
        self.subexpr.expr = self.evar.get()

class Subterm:
    """one Submaster and its Subexpr"""
    def scaled(self,t):
        return self.sub * self.subexpr.eval(t)

class Subtermview(tk.Frame):
    def __init__(self,master,st,**kw):
        self.subterm = st
        tk.Frame.__init__(self,master,bd=1,relief='raised',**kw)
        tk.Label(self,text="sub %r" % self.subterm.sub.name).pack(side='left')
        sev=Subexprview(self,self.subterm.subexpr)
        sev.pack(side='left',fill='both',exp=1)

class Output:
    def __init__(self,subterms):
        make_attributes_from_args('subterms')
    def send_dmx(self,t):

        scaledsubs=[]
        for st in self.subterms:
            scl = st.scaled(t)
            scaledsubs.append(scl)
        out = Submaster.sub_maxes(*scaledsubs)
        dispatcher.send("output levels",val=out.get_levels())
        dmxclient.outputlevels(out.get_dmx_list(),twisted=1)

def create_status_lines(master):
    for signame,textfilter in [
        ('input time',lambda t: "%.2fs"%t),
        ('output levels',
         lambda levels: textwrap.fill("; ".join(["%s:%.2f"%(n,v)
                                                 for n,v in
                                                 levels.items()]),70)),
        ('update period',lambda t: "%.1fms"%(t*1000)),
        ]:
        l = tk.Label(master,anchor='w',justify='left')
        l.pack(side='top',fill='x')
        dispatcher.connect(lambda val,l=l,sn=signame,tf=textfilter:
                           l.config(text=sn+": "+tf(val)),
                           signame,weak=0)

def savesubterms(filename,subterms):
    f = file(filename,'w')
    for st in subterms:
        f.write("%s %s\n" % (st.sub.name,st.subexpr.expr))
    f.close()

def save(song,subterms,curveset):
    savesubterms("subterms/"+song,subterms)
    curveset.save(basename="curves/"+song)

#######################################################################
root=tk.Tk()
root.wm_geometry("790x930")
#root.tk_focusFollowsMouse()

music=Music()

zc = Zoomcontrol(root)
zc.pack(side='top',fill='x')

curveset = Curveset()
csv = Curvesetview(root,curveset)
csv.pack(side='top',fill='both',exp=1)

song = "16mix.wav"

curveset.load(basename="curves/"+song)

subterms = []
for line in file("subterms/"+song):
    subname,expr = line.strip().split(" ",1)

    term = Subterm()

    sexpr = Subexpr(curveset)
    sexpr.expr = expr
    
    term.sub = Submaster.Submaster(subname)
    term.subexpr = sexpr
    subterms.append(term)
    
    stv=Subtermview(root,term)
    stv.pack(side='top',fill='x')

out = Output(subterms)

#save(song,subterms,curveset)

create_status_lines(root)
    
recent_t=[]
later = None
def update():
    global later
    d = music.current_time()
    d.addCallback(update2)
    d.addErrback(updateerr)
def updateerr(e):
    global later
    print "err",e
    if later and not later.cancelled and not later.called: later.cancel()
    later = reactor.callLater(1,update)
def update2(t):
    global recent_t,later

    if later and not later.cancelled and not later.called: later.cancel()
    later = reactor.callLater(.01,update)

    recent_t = recent_t[-50:]+[t]
    period = (recent_t[-1]-recent_t[0])/len(recent_t)
    dispatcher.send("update period",val=period)
    out.send_dmx(t)
update()

tksupport.install(root,ms=10)
if 0:
    sys.path.append("/home/drewp/projects/editor/pour")
    from utils import runstats
    runstats("reactor.run()")
else:
    reactor.run()