# Taken from mission The Warriors


class Warrior:
    def __init__(self):
        self.health = 50
        self.attack = 5
        self.is_alive = True

    def hit(self, other_unit) -> bool:
        other_unit.health -= self.attack
        other_unit.is_alive = other_unit.health > 0
        return other_unit.is_alive


class Knight(Warrior):
    def __init__(self):
        super().__init__()
        self.attack = 7


def fight(unit_1, unit_2):
    while unit_1.is_alive and unit_2.is_alive:
        if not unit_1.hit(unit_2):
            return True
        if not unit_2.hit(unit_1):
            return False


class Army:
    def __init__(self):
        self.units = []

    def add_units(self, unit_type, quantity):
        for i in range(quantity):
            self.units.append(unit_type())


class Battle:
    def fight(self, army_1: Army, army_2: Army) -> bool:
        while len(army_1.units) > 0 and len(army_2.units) > 0:
            current_unit_1 = army_1.units[0]
            current_unit_2 = army_2.units[0]
            if fight(current_unit_1, current_unit_2):
                army_2.units.pop(0)
            else:
                army_1.units.pop(0)
        return len(army_1.units) > 0


if __name__ == '__main__':
    # These "asserts" using only for self-checking and not necessary for auto-testing

    # fight tests
    chuck = Warrior()
    bruce = Warrior()
    carl = Knight()
    dave = Warrior()
    mark = Warrior()

    assert fight(chuck, bruce) == True
    assert fight(dave, carl) == False
    assert chuck.is_alive == True
    assert bruce.is_alive == False
    assert carl.is_alive == True
    assert dave.is_alive == False
    assert fight(carl, mark) == False
    assert carl.is_alive == False

    # battle tests
    my_army = Army()
    my_army.add_units(Knight, 3)

    enemy_army = Army()
    enemy_army.add_units(Warrior, 3)

    army_3 = Army()
    army_3.add_units(Warrior, 20)
    army_3.add_units(Knight, 5)

    army_4 = Army()
    army_4.add_units(Warrior, 30)

    battle = Battle()

    assert battle.fight(my_army, enemy_army) == True
    assert battle.fight(army_3, army_4) == False
    print("Coding complete? Let's try tests!")

    army_1 = Army()
    army_2 = Army()
    army_1.add_units(Warrior, 10)
    army_2.add_units(Warrior, 11)
    battle = Battle()
    battle.fight(army_1, army_2)