# containment vessel

class Pot:
    def __init__(self):
        self.has_pot = True
        self.has_coffee = False
        self.warming_plate_on = False
        self.is_brewing = False

    def is_ready(self):
        return self.has_pot
    def start(self):
        self.is_brewing = True

    def pause(self):
        if self.
            self.warming_plate_on = False

    def resume(self):
        if self.has_coffee:
            self.warming_plate_on = True

    def done(self):
        self.is_brewing = False

# hot water source
class WaterSource:
    def __init__(self):
        # default to false later
        self.has_water = True
        self.boiler_on = False
        self.valve_open = True
    def is_ready(self):
        # "NotEmpty" = True
        return self.has_water

    def boiling(self):
        return self.boiler_on

    def start(self):
        self.boiler_on = True
        self.valve_open = False

    def pause(self):
        self.valve_open = True
        self.boiler_on = False

    def resume(self):
        self.valve_open = False
        self.boiler_on = True

    def done(self):
        self.boiler_on = False
        self.valve_open = True


class CoffeeMaker:
    def __init__(self):
        self.pot = Pot()
        self.water_source = WaterSource()
        self.brew_light = False 

    def push_brew_button(self):
        self.brew()
    def remove_pot(self):
        self.pot.has_pot = False
    def add_water(self):
        self.water_source.has_water = True
    def poll(self):
        # is pot on warmer plate
        if self.pot.is_ready():
            if self.water_source.boiling():
                self.pot.has_coffee = True
                self.water_source.valve_open = False
            # does pot have coffee
            if self.pot.has_coffee:
                self.pot.warming_plate_on = True
            else:
                self.pot.warming_plate_on = False            
            # 
            if not self.water_source.has_water:
                self.water_source.done()
                self.brew_light = True

            if not self.water_source.has_water and not self.pot.has_coffee and self.pot.is_brewing:
                self.pot.done()
                self.brew_light = False
        else:
            self.water_source.valve_open = True
            self.pot.has_coffee = False


    def brew(self):
        if not self.pot.is_ready() or not self.water_source.is_ready():
            return False

        self.pot.start()

        while self.water_source.boiling():
            self.poll()

        while self.pot.has_coffee():
            self.poll()