""" bank13: Wait for the doorman to give a signal: *waitevent*"""
from SimPy.Simulation import *
from random import *

## Model components ------------------------

dooropen = SimEvent("Door Open")


class Doorman(Process):
    """ Doorman opens the door"""
    def openthedoor(self):
        """ He will opens the door at fixed intervals"""
        for i in range(5):
            yield hold, self, 30.0
            dooropen.signal()
            print("%7.4f You may enter" % (now()))


class Source(Process):
    """ Source generates customers randomly"""
    def generate(self, number, rate):
        for i in range(number):
            c = Customer(name="Customer%02d" % (i))
            activate(c, c.visit(timeInBank=12.0))
            yield hold, self, expovariate(rate)


class Customer(Process):
    """ Customer arrives, is served and leaves """
    def visit(self, timeInBank=10):
        arrive = now()

        if dooropen.occurred:
            msg = '.'
        else:
            msg = ' but the door is shut.'
        print("%7.4f %s: Here I am%s" % (now(), self.name, msg))
        yield waitevent, self, dooropen

        print("%7.4f %s: The door is open!" % (now(), self.name))

        wait = now() - arrive
        print("%7.4f %s: Waited %6.3f" % (now(), self.name, wait))

        yield request, self, counter
        tib = expovariate(1.0 / timeInBank)
        yield hold, self, tib
        yield release, self, counter

        print("%7.4f %s: Finished    " % (now(), self.name))

## Experiment data -------------------------

maxTime = 400.0  # minutes

counter = Resource(1, name="Clerk")

## Model  ----------------------------------


def model(SEED=393939):
    seed(SEED)

    initialize()
    doorman = Doorman()
    activate(doorman, doorman.openthedoor())
    source = Source()
    activate(source,
             source.generate(number=5, rate=0.1), at=0.0)
    simulate(until=maxTime)


## Experiment  ----------------------------------

model()