from django.db import models
from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin
from django.core.mail import send_mail
from django.utils.translation import ugettext_lazy as _
from django.utils import timezone

from .managers import RadioUserManager


class RadioUser(AbstractBaseUser, PermissionsMixin):
    """
    Custom user model which uses email as the main identifier and adds a flag
    for whether the user is the radio DJ.

    Reworked from the django-authtools module.
    """
    email = models.EmailField(_('email address'), max_length=255, unique=True)
    name = models.CharField(_('name'), max_length=255)

    is_dj = models.BooleanField(_('dj status'), default=False,
        help_text=_('Designates whether the user is the automated dj account '
                    'or is a real person account.')
    )
    is_staff = models.BooleanField(_('staff status'), default=False,
        help_text=_('Designates whether the user can log into the admin site.')
    )
    is_active = models.BooleanField(_('active'), default=True,
        help_text=_('Designates whether the user should be treated as active. '
                    'Unselect this instead of deleting accounts.')
    )
    date_joined = models.DateTimeField(_('date joined'), default=timezone.now)

    objects = RadioUserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['name']

    class Meta:
        ordering = ['name', 'email']

    def get_full_name(self):
        return self.name

    def get_short_name(self):
        return self.name

    def email_user(self, subject, message, from_email=None, **kwargs):
        '''
        Sends an email to this user.
        '''

        send_mail(subject, message, from_email, [self.email], **kwargs)

    def __str__(self):
        return '{name} <{email}>'.format(
            name=self.name,
            email=self.email,
        )


class Setting(models.Model):
    """
    A model for keeping track of dynamic settings while the site is online and
    the radio is running.
    """
    INTEGER = 0
    FLOAT = 1
    STRING = 2
    BOOL = 3
    TYPE_CHOICES = (
        (INTEGER, 'Integer'),
        (FLOAT, 'Float'),
        (STRING, 'String'),
        (BOOL, 'Bool'),
    )
    name = models.CharField(_('name'), max_length=64, unique=True)
    description = models.TextField(_('description'), blank=True)
    setting_type = models.PositiveIntegerField(_('variable type'),
                                               choices=TYPE_CHOICES,
                                               default=INTEGER)
    data = models.TextField(_('data'))

    def get(self):
        if self.setting_type == self.INTEGER:
            return int(self.data)
        elif self.setting_type == self.FLOAT:
            return float(self.data)
        elif self.setting_type == self.BOOL:
            return self.data == 'True'
        else:
            return self.data

    def __str__(self):
        return '{}: {}'.format(self.name, self.data)