import expert
"""
Rule database

Any rules starting with "Rule_" will be automatically intantiated
by Expert.rules_init()

Rules not starting with "Rule_" must be manually intantiated
and added to the system via 'Expert.rule_add(rule)'
"""

class Rule_1a(expert.Rule):
    """determine weather: if temp > 70, it's warm"""
    def match(self, facts):
         return int(facts.get('temp')) >= 70
    def fire(self, facts):
        facts.set('weather', 'warm')

class Rule_1b(expert.Rule):
    """determine weather: if temp < 70, it's cold"""
    def match(self, facts):
         return int(facts.get('temp')) < 70
    def fire(self, facts):
        facts.set('weather', 'cold')

class Rule_1a1(expert.Rule):
    """if it's warm and not cloudy, wear shorts"""
    def match(self, facts):
        return facts.get('weather') == 'warm' and not facts.get('cloudy')
    def fire(self, facts):
        facts.set('action', "Wear Shorts")
        
class Rule_1a2(expert.Rule):
    """if it's warm and cloudy, bring an umbrella"""
    def match(self, facts):
        return facts.get('weather') == 'warm' and facts.get('cloudy')
    def fire(self, facts):
        facts.set('action', "Bring Umbrella")

class Rule_1b1(expert.Rule):
    """if it's cold and not cloudy, wear pants"""
    def match(self, facts):
        return facts.get('weather') == 'cold' and not facts.get('cloudy')
    def fire(self, facts):
        facts.set('action', "Wear Pants")
        
class Rule_1b2(expert.Rule):
    """if it's cold and cloudy, wear galoshes"""
    def match(self, facts):
        return facts.get('weather') == 'cold' and facts.get('cloudy')
    def fire(self, facts):
        facts.set('action', "Wear Galoshes")