import serial, time
import sys
import win32gui

class Spotify(object):


        APPCOMMAND      = 0x0319

        # Command IDs
        CMD_PLAYPAUSE   = 917504

        # Instance vars
        _hwnd            = None
        def __init__(self):
                try:
                        self._hwnd = win32gui.FindWindow("SpotifyMainWindow", None)
                except:
                        raise self.SpotifyWindowNotFoundException()
        def playpause(self):
                self._sendCommand(self.CMD_PLAYPAUSE)

COMMANDLINE_COMMANDS = {
                'playpause': Spotify.playpause
}
if __name__ == "__main__":
        def fail():
                print ("Usage: pytify.py "+"|".join(COMMANDLINE_COMMANDS.keys()))
                sys.exit(0)
        ser =serial.Serial('COM5', 9600)
        cmd_name = ser.readline()
        if not(cmd_name) in COMMANDLINE_COMMANDS: fail()

        cmd = COMMANDLINE_COMMANDS[cmd_name]

        try:
                spotify = Spotify()


        except:
                #print "Spotify is not running"
                sys.exit(0)

        res = cmd(spotify)
        if res : print(res)