"""SoundFarmer
"""

import os
from math import sin
from struct import pack

import objc
from PyObjCTools import NibClassBuilder
from Foundation import NSData
import AppKit

import PyCoreAudio
import ToolbarHelper

_16BIT = 2**16.0/2.0-0.5

NibClassBuilder.extractClasses('MainMenu.nib')
class SFAppDelegate(NibClassBuilder.AutoBaseClass):
    def applicationDidFinishLaunching_(self, notification):
        self.offset = 0
        self.audio.setBufferMultiplier_(1)

    def toggle_(self, sender):
        pass

    def play_(self, sender):
        if hasattr(sender, 'audio'):
            print "DOCUMENT"
            self.audio.setDelegate_(sender.audio())
        self.audio.setSendPlaybackNeedsRefillNotifications_(True)
        self.audio.setDeviceOpen_(True)

    def stop_(self, sender):
        self.audio.setSendPlaybackNeedsRefillNotifications_(False)
        self.audio.setDeviceOpen_(False)

    def receiveAudioSampleData_(self, data):
        pass

    def playbackNeedsRefill_(self, half):
        print "half", half
        offset = self.offset
        bytes = ''
        for frame in xrange(256):
            v = int(
                (0.5 * sin(3.1415*440.0/8000.0*(frame+offset))) * _16BIT)
            bytes += pack('b', v >> 8)
            bytes += pack('b', 0x0f & v)

        self.audio.queueAudioSampleData_sequenceNumber_(
            NSData.alloc().initWithBytes_length_(bytes, 512), 0)

        self.offset += 256