Core Models

from django.db import models
from django.contrib.auth.models import BaseUserManager, AbstractBaseUser
from django.conf import settings


class MyUserManager(BaseUserManager):
    def create_user(self, email, password=None):
        """
        Creates and saves a User with the given email and password
        """
        if not email:
            raise ValueError('Users must have an email address')

        user = self.model(email=self.normalize_email(email))

        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_superuser(self, email, password):
        """
        Creates and saves a superuser with the given email and password.
        """
        user = self.create_user(email, password=password)
        user.is_admin = True
        user.save(using=self._db)
        return user


class MyUser(AbstractBaseUser):
    """Custom User Model so that a customer's username is their email address.
    This makes the account creation process easier as they don't have to
    think of and remember a username.
    """
    email = models.EmailField(unique=True)
    full_name = models.CharField(max_length=255, blank=True)
    first_name = models.CharField(max_length=255, blank=True)
    is_active = models.BooleanField(default=True)
    is_admin = models.BooleanField(default=False)

    objects = MyUserManager()

    USERNAME_FIELD = 'email'

    def get_full_name(self):
        # Identify User by first and last name if available.  If not, return self.email
        try:
            return self.first_name + ' ' + self.last_name
        except:
            return self.email

    def get_short_name(self):
        # Identify User by first name if available.  If not, return self.email
        try:
            return self.first_name
        except:
            return self.email

    def __str__(self):
        return self.email

    def has_perm(self, perm, obj=None):
        "Does the user have a specific permission?"
        return True

    def has_module_perms(self, core):
        "Does the user have permissions to view the core application?"
        return True

    @property
    def is_staff(self):
        "Is the user a member of staff?"
        return self.is_admin


class Company(models.Model):
    """Model to provide the association between a company, and what could
    be multiple users (Contacts) at that company.  See Contact Model.
    """
    company = models.CharField(max_length=50, blank=True)
    website = models.CharField(max_length=200, blank=True)
    address_one = models.CharField(max_length=50, blank=True)
    address_two = models.CharField(max_length=50, blank=True)
    city = models.CharField(max_length=30, blank=True)
    state = models.CharField(max_length=30, blank=True)
    zipcode = models.CharField(max_length=10, blank=True)
    phone = models.CharField(max_length=25, blank=True)
    notes = models.TextField(blank=True)

    def __str__(self):
        return str(self.company)


class Contact(models.Model):
    """Model to create an association with a Company for a Contact (if needed)."""
    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    account_rep = models.ForeignKey('Employee', blank=True, null=True)
    company = models.ForeignKey('Company', on_delete=models.CASCADE, blank=True)
    address_one = models.CharField(max_length=50, blank=True)
    address_two = models.CharField(max_length=50, blank=True)
    city = models.CharField(max_length=30, blank=True)
    state = models.CharField(max_length=30, blank=True)
    zipcode = models.CharField(max_length=10, blank=True)
    phone = models.CharField(max_length=25, blank=True)
    notes = models.TextField(blank=True)

    def __str__(self):
        if self.first_name and self.last_name:
            return str(self.first_name + ' ' + self.last_name)


class Employee(models.Model):
    """Model to identify Employee User accounts with their associated
     departments at Southeast.
    """
    SALESREP = 'SR'
    CUSTOMERSERVICEREP = 'CSR'
    ART = 'ART'
    PRODUCTION = 'PROD'
    DEPARTMENTS = (
        (SALESREP, 'Sales'),
        (CUSTOMERSERVICEREP, 'Customer Service'),
        (ART, 'Art'),
        (PRODUCTION, 'Production'),
    )
    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    department = models.CharField(max_length=4, choices=DEPARTMENTS, default=ART)
    address_one = models.CharField(max_length=50, blank=True)
    address_two = models.CharField(max_length=50, blank=True)
    city = models.CharField(max_length=30, blank=True)
    state = models.CharField(max_length=30, blank=True)
    zipcode = models.CharField(max_length=10, blank=True)
    phone = models.CharField(max_length=25, blank=True)

    def __str__(self):
        if self.first_name and self.last_name:
            return str(self.first_name + ' ' + self.last_name)
        else:
            return str(self.user)