#!/usr/bin/python

import math

import twisted.internet.fdesc

from twisted.internet import reactor

from twisted.internet.task import LoopingCall

from typing import Dict

class BCF2000(object):

    control = {81 : "slider1", 82 : "slider2", 83 : "slider3", 84 : "slider4",

               85 : "slider5", 86 : "slider6", 87 : "slider7", 88 : "slider8",

                1 : "knob1",  2 : "knob2",  3 : "knob3",  4 : "knob4",

                5 : "knob5",  6 : "knob6",  7 : "knob7",  8 : "knob8",

               33 : "button-knob1", 34 : "button-knob2",

               35 : "button-knob3", 36 : "button-knob4",

               37 : "button-knob5", 38 : "button-knob6",

               39 : "button-knob7", 40 : "button-knob8",

               65 : "button-upper1",  66 : "button-upper2",

               67 : "button-upper3",  68 : "button-upper4",

               69 : "button-upper5",  70 : "button-upper6",

               71 : "button-upper7",  72 : "button-upper8",

               73 : "button-lower1",  74 : "button-lower2",

               75 : "button-lower3",  76 : "button-lower4",

               77 : "button-lower5",  78 : "button-lower6",

               79 : "button-lower7",  80 : "button-lower8",

               89 : "button-corner1", 90 : "button-corner2",

               91 : "button-corner3", 92 : "button-corner4",

               }

            for x in range(1,8+1):

                self.valueOut('button-upper%s' % x, value > x*15)

                self.valueOut('button-lower%s' % x, value > (x*15+7))

    def valueOut(self, name, value):

        """call this to send an event to the hardware"""

        if self.dev is None:

            return

        value = int(value)

        if self.lastValue.get(name) == value:

            return

        self.lastValue[name] = value

        which = [k for k,v in list(self.control.items()) if v == name]

        assert len(which) == 1, "unknown control name %r" % name

        if name.startswith('button-'):

            value = value * 127

        #print "bcf: write %s %s" % (name, value)

        self.dev.write(bytes([0xb0, which[0], int(value)]))

    def close(self):

        self.dev.close()

        self.dev = None

if __name__ == '__main__':

    b = BCF2000()

    reactor.run()