class Building(models.Model):
    BUILDING_MAX_LEN = 50
    TOWN_MAX_LEN = 50

    name = models.CharField(
        max_length=BUILDING_MAX_LEN,
        unique=True,
        null=False,
        blank=False
    )

    town = models.CharField(max_length=TOWN_MAX_LEN)

    building_address = models.TextField()

    number_of_floors = models.IntegerField(
        validators=[MinValueValidator(1)]
    )

    def __str__(self):
        return self.name

    class Meta:
        verbose_name_plural = 'Building'


class People(models.Model):
    first_name = models.CharField(
        verbose_name='First Name',
        max_length=30,
        null=False,
        blank=False
    )

    last_name = models.CharField(
        verbose_name='Last Name',
        max_length=30,
        null=False,
        blank=False,
    )

    taxes = models.BooleanField(
        verbose_name='Taxes',
        default=False,
        null=False,
        blank=False,
    )

    building = models.ForeignKey(
        Building,
        verbose_name="Building",
        on_delete=models.CASCADE,
        null=False,
        blank=False,
    )

    phone = models.IntegerField(
        verbose_name='Mobile Phone',
        null=True,
        blank=True,
    )

    current_email = models.EmailField(
        verbose_name='Email',
        null=True,
        blank=True,
    )