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class Player
def initialize
@behaviours = [Rest.new, Attack.new, Walk.new]
end
def play_turn(warrior)
@initial_health ||= warrior.health
@behaviours.each do |action|
action.play(warrior) if action.matches(warrior)
end
end
end
class GoodHealth
FIFTY_PERCENT = 0.5
def matches(warrior)
@initial_health ||= warrior.health
health_is_good(warrior)
end
private
def health_is_good(warrior)
threshold = FIFTY_PERCENT * @initial_health
warrior.health > threshold
end
end
class Attack
def initialize(good_health = GoodHealth.new)
@good_health = good_health
end
def matches(warrior)
warrior.feel.empty? == false && @good_health.matches(warrior)
end
def play(warrior)
warrior.attack!
end
end
class Rest
FIFTY_PERCENT = 0.5
def matches(warrior)
@initial_health ||= warrior.health
warrior.feel.empty? == false && health_is_low(warrior)
end
def play(warrior)
warrior.rest!
end
private
def health_is_low(warrior)
threshold = FIFTY_PERCENT * @initial_health
warrior.health <= threshold
end
end
class Walk
def matches(warrior)
warrior.feel.empty?
end
def play(warrior)
warrior.walk!
end
end
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