#!/usr/bin/env python

"""
.. module:: lamp
    :platform: unix
    :synopsis: This module is for communicating with the lamp.

.. codeauthor:: Michael Coughlin, Eric Coughlin

.. warning:: This module is currently inactive
"""

import optparse
import os

import pexpect


class Lamp:
    """
    This is the class for communicating with the lamp.
    """
    def __init__(self):
        self.status = None

    def run_lamp(self,val):
        """

        :param val: the brightness of the lamp to change to.
        :return:
        """
        if val > 255 or val < 0:
            raise Exception("Lamp must be between 0-255")
        print "Running the lamp ..."
        lamp = val
        shutter_command = "picocom -b 57600 /dev/ttyACM.LAMP"
        child = pexpect.spawn(shutter_command)
        loop = True
        while loop:
            i = child.expect([pexpect.TIMEOUT, '\n'], timeout=2)
            # print child.before, child.after
            if i == 0:  # Timeout
                argstring = 'args %d 1\r' %lamp
                print argstring
                child.sendline(argstring)
                loop = False
            if i == 1:
                continue
        child.close()

    def compile_lamp(self):
        """
        This method compiles the lamp from the arduino code.

        :return:
        """
        steps_command = "cd /home/pi/Code/arduino/lamp/; ./compile.sh"
        os.system(steps_command)


def parse_commandline():
    """
    Parse the options given on the command-line.
    """
    parser = optparse.OptionParser()

    parser.add_option("-l","--lamp", default=100, type=int)
    parser.add_option("-c","--doCompile", action="store_true", default=False)
    parser.add_option("--doLamp", action="store_true", default=False)

    opts, args = parser.parse_args()

    return opts


def main(runtype="compile", val=0):
    lamp = Lamp()
    if runtype == "compile":
        lamp.compile_lamp()
    elif runtype == "lamp":
        lamp.run_lamp(val)

if __name__ == "__main__":

    # Parse command line
    opts = parse_commandline()

    if opts.doCompile:
        main(runtype="compile")
    if opts.doLamp:
        main(runtype="lamp", val = opts.lamp)