""" bank05: The single Random Customer """
from SimPy.Simulation import *
from random import expovariate, seed       # (1)

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


class Customer(Process):
    """ Customer arrives at a random time,
        looks around and then leaves """

    def visit(self, timeInBank):
        print("%f %s Here I am" % (now(), self.name))
        yield hold, self, timeInBank
        print("%f %s I must leave" % (now(), self.name))

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

maxTime = 100.0    # minutes
timeInBank = 10.0
## Model/Experiment ------------------------------

seed(99999)                   # (2)
initialize()
c = Customer(name="Klaus")
t = expovariate(1.0 / 5.0)      # (3)
activate(c, c.visit(timeInBank), at=t)  # (4)
simulate(until=maxTime)