#!/usr/bin/env python

class Features(object):
    ballFar = True
    ballOnLeft = True


class Goalkeeper(object):
    def __init__(self, features):
        self.features = features
        self.diveFramesRemaining = 0
        self.lastDiveCommand = None
        
    def next(self):
        features = self.features
        if self.diveFramesRemaining:
            self.diveFramesRemaining -= 1
            return self.lastDiveCommand
        else:
            if features.ballFar:
                return 'stand'
            else:
                if features.ballOnLeft:
                    command = 'diveLeft'
                else:
                    command = 'diveRight'
                self.lastDiveCommand = command
                self.diveFramesRemaining = 29
                return command


class GoalkeeperWithGenerator(object):
    def __init__(self, features):
        self.features = features

    def behavior(self):
        while True:
            features = self.features
            if features.ballFar:
                yield 'stand'
            else:
                if features.ballOnLeft:
                    command = 'diveLeft'
                else:
                    command = 'diveRight'
                for i in xrange(30):
                    yield command


import random
f = Features()
g1 = Goalkeeper(f)
g2 = GoalkeeperWithGenerator(f).behavior()

for i in xrange(10000):
    f.ballFar = random.random() > 0.1
    f.ballOnLeft = random.random() < 0.5
    g1action = g1.next()
    g2action = g2.next()
    print "%s\t%s\t%s\t%s" % (
        f.ballFar, f.ballOnLeft, g1action, g2action)
    assert(g1action == g2action)