from django.db import models
from django.utils import timezone

from config.extras import BREWFATHER_APP_ROOT

import logging
logger = logging.getLogger('django')

class CustomModel(models.Model):
    """ Custom model class with default fields to use. """
    created_date = models.DateTimeField(default=timezone.now)

    class Meta:
        abstract = True


class Batch(CustomModel):
    brewfather_id = models.CharField(max_length=50)
    brewfather_num = models.IntegerField(default=1)
    brewfather_name = models.CharField(max_length=500, default='name')
    recipe = models.ForeignKey('BatchRecipe', on_delete=models.CASCADE, default=1)

    @property
    def brewfather_url(self):
        return '{}/tabs/batches/batch/{}'.format(BREWFATHER_APP_ROOT, self.brewfather_id)

    def __str__(self):
        # Return a string that represents the instance
        return 'BF #{num}: {name}'.format(name=self.brewfather_name, num=self.brewfather_num)

class BatchRecipe(CustomModel):
    """ Recipe to be stored with a batch."""
    name = models.CharField(max_length=50)


class Recipe(CustomModel):
    """ Recipes not attched to batches."""
    name = models.CharField(max_length=50)