# -*- coding: utf-8 -*-
"""
42. Serialization

``django.core.serializers`` provides interfaces to converting Django
``QuerySet`` objects to and from "flat" data (i.e. strings).
"""
from __future__ import unicode_literals

from decimal import Decimal

from django.db import models
from django.utils import six
from django.utils.encoding import python_2_unicode_compatible
from django.contrib.contenttypes import generic
from django.contrib.contenttypes.models import ContentType


@python_2_unicode_compatible
class Category(models.Model):
    name = models.CharField(max_length=20)

    class Meta:
        ordering = ('name', )

    def __str__(self):
        return self.name


@python_2_unicode_compatible
class Author(models.Model):
    name = models.CharField(max_length=20)

    class Meta:
        ordering = ('name',)

    def __str__(self):
        return self.name


@python_2_unicode_compatible
class Article(models.Model):
    author = models.ForeignKey(Author)
    headline = models.CharField(max_length=50)
    pub_date = models.DateTimeField()
    categories = models.ManyToManyField(Category)

    class Meta:
        ordering = ('pub_date', )

    def __str__(self):
        return self.headline


@python_2_unicode_compatible
class AuthorProfile(models.Model):
    author = models.OneToOneField(Author, primary_key=True)
    date_of_birth = models.DateField()

    def __str__(self):
        return "Profile of %s" % self.author


@python_2_unicode_compatible
class Actor(models.Model):
    name = models.CharField(max_length=20, primary_key=True)

    class Meta:
        ordering = ('name', )

    def __str__(self):
        return self.name


@python_2_unicode_compatible
class Movie(models.Model):
    actor = models.ForeignKey(Actor)
    title = models.CharField(max_length=50)
    price = models.DecimalField(max_digits=6, decimal_places=2, default=Decimal('0.00'))

    class Meta:
        ordering = ('title', )

    def __str__(self):
        return self.title


class Score(models.Model):
    score = models.FloatField()


@python_2_unicode_compatible
class Team(object):
    def __init__(self, title):
        self.title = title

    def __str__(self):
        raise NotImplementedError("Not so simple")

    def to_string(self):
        return "%s" % self.title


class TeamField(six.with_metaclass(models.SubfieldBase, models.CharField)):

    def __init__(self):
        super(TeamField, self).__init__(max_length=100)

    def get_db_prep_save(self, value, connection):
        return six.text_type(value.title)

    def to_python(self, value):
        if isinstance(value, Team):
            return value
        return Team(value)

    def value_to_string(self, obj):
        return self._get_val_from_obj(obj).to_string()


@python_2_unicode_compatible
class Player(models.Model):
    name = models.CharField(max_length=50)
    rank = models.IntegerField()
    team = TeamField()

    def __str__(self):
        return '%s (%d) playing for %s' % (self.name, self.rank, self.team.to_string())


"""
A test spanning all the capabilities of all the serializers.

This class sets up a model for each model field type
(except for image types, because of the PIL dependency).
"""

# The following classes are for testing basic data
# marshalling, including NULL values, where allowed.

# class BinaryData(models.Model):
#     data = models.BinaryField(null=True)

class BooleanData(models.Model):
    data = models.BooleanField()

class CharData(models.Model):
    data = models.CharField(max_length=30, null=True)

class DateData(models.Model):
    data = models.DateField(null=True)

class DateTimeData(models.Model):
    data = models.DateTimeField(null=True)

class DecimalData(models.Model):
    data = models.DecimalField(null=True, decimal_places=3, max_digits=5)

class EmailData(models.Model):
    data = models.EmailField(null=True)

class FileData(models.Model):
    data = models.FileField(null=True, upload_to='/foo/bar')

class FilePathData(models.Model):
    data = models.FilePathField(null=True)

class FloatData(models.Model):
    data = models.FloatField(null=True)

class IntegerData(models.Model):
    data = models.IntegerField(null=True)

class BigIntegerData(models.Model):
    data = models.BigIntegerField(null=True)

# class ImageData(models.Model):
#    data = models.ImageField(null=True)

class IPAddressData(models.Model):
    data = models.IPAddressField(null=True)

class GenericIPAddressData(models.Model):
    data = models.GenericIPAddressField(null=True)

class NullBooleanData(models.Model):
    data = models.NullBooleanField(null=True)

class PositiveIntegerData(models.Model):
    data = models.PositiveIntegerField(null=True)

class PositiveSmallIntegerData(models.Model):
    data = models.PositiveSmallIntegerField(null=True)

class SlugData(models.Model):
    data = models.SlugField(null=True)

class SmallData(models.Model):
    data = models.SmallIntegerField(null=True)

class TextData(models.Model):
    data = models.TextField(null=True)

class TimeData(models.Model):
    data = models.TimeField(null=True)

class Tag(models.Model):
    """A tag on an item."""
    data = models.SlugField()
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()

    content_object = generic.GenericForeignKey()

    class Meta:
        ordering = ["data"]

class GenericData(models.Model):
    data = models.CharField(max_length=30)

    tags = generic.GenericRelation(Tag)

# The following test classes are all for validation
# of related objects; in particular, forward, backward,
# and self references.

class Anchor(models.Model):
    """This is a model that can be used as
    something for other models to point at"""

    data = models.CharField(max_length=30)

    class Meta:
        ordering = ('id',)

class NaturalKeyAnchorManager(models.Manager):
    def get_by_natural_key(self, data):
        return self.get(data=data)

class NaturalKeyAnchor(models.Model):
    objects = NaturalKeyAnchorManager()

    data = models.CharField(max_length=100, unique=True)

    def natural_key(self):
        return (self.data,)

class UniqueAnchor(models.Model):
    """This is a model that can be used as
    something for other models to point at"""

    data = models.CharField(unique=True, max_length=30)

class FKData(models.Model):
    data = models.ForeignKey(Anchor, null=True)

class FKDataNaturalKey(models.Model):
    data = models.ForeignKey(NaturalKeyAnchor, null=True)

class M2MData(models.Model):
    data = models.ManyToManyField(Anchor, null=True)

class O2OData(models.Model):
    # One to one field can't be null here, since it is a PK.
    data = models.OneToOneField(Anchor, primary_key=True)

class FKSelfData(models.Model):
    data = models.ForeignKey('self', null=True)

class M2MSelfData(models.Model):
    data = models.ManyToManyField('self', null=True, symmetrical=False)

class FKDataToField(models.Model):
    data = models.ForeignKey(UniqueAnchor, null=True, to_field='data')

class FKDataToO2O(models.Model):
    data = models.ForeignKey(O2OData, null=True)

class M2MIntermediateData(models.Model):
    data = models.ManyToManyField(Anchor, null=True, through='Intermediate')

class Intermediate(models.Model):
    left = models.ForeignKey(M2MIntermediateData)
    right = models.ForeignKey(Anchor)
    extra = models.CharField(max_length=30, blank=True, default="doesn't matter")

# The following test classes are for validating the
# deserialization of objects that use a user-defined
# field as the primary key.
# Some of these data types have been commented out
# because they can't be used as a primary key on one
# or all database backends.

class BooleanPKData(models.Model):
    data = models.BooleanField(primary_key=True)

class CharPKData(models.Model):
    data = models.CharField(max_length=30, primary_key=True)

# class DatePKData(models.Model):
#    data = models.DateField(primary_key=True)

# class DateTimePKData(models.Model):
#    data = models.DateTimeField(primary_key=True)

class DecimalPKData(models.Model):
    data = models.DecimalField(primary_key=True, decimal_places=3, max_digits=5)

class EmailPKData(models.Model):
    data = models.EmailField(primary_key=True)

# class FilePKData(models.Model):
#    data = models.FileField(primary_key=True, upload_to='/foo/bar')

class FilePathPKData(models.Model):
    data = models.FilePathField(primary_key=True)

class FloatPKData(models.Model):
    data = models.FloatField(primary_key=True)

class IntegerPKData(models.Model):
    data = models.IntegerField(primary_key=True)

# class ImagePKData(models.Model):
#    data = models.ImageField(primary_key=True)

class IPAddressPKData(models.Model):
    data = models.IPAddressField(primary_key=True)

class GenericIPAddressPKData(models.Model):
    data = models.GenericIPAddressField(primary_key=True)

# This is just a Boolean field with null=True, and we can't test a PK value of NULL.
# class NullBooleanPKData(models.Model):
#     data = models.NullBooleanField(primary_key=True)

class PositiveIntegerPKData(models.Model):
    data = models.PositiveIntegerField(primary_key=True)

class PositiveSmallIntegerPKData(models.Model):
    data = models.PositiveSmallIntegerField(primary_key=True)

class SlugPKData(models.Model):
    data = models.SlugField(primary_key=True)

class SmallPKData(models.Model):
    data = models.SmallIntegerField(primary_key=True)

# class TextPKData(models.Model):
#     data = models.TextField(primary_key=True)

# class TimePKData(models.Model):
#    data = models.TimeField(primary_key=True)

class ComplexModel(models.Model):
    field1 = models.CharField(max_length=10)
    field2 = models.CharField(max_length=10)
    field3 = models.CharField(max_length=10)

# Tests for handling fields with pre_save functions, or
# models with save functions that modify data
class AutoNowDateTimeData(models.Model):
    data = models.DateTimeField(null=True, auto_now=True)

class ModifyingSaveData(models.Model):
    data = models.IntegerField(null=True)

    def save(self):
        "A save method that modifies the data in the object"
        self.data = 666
        super(ModifyingSaveData, self).save(raw)

# Tests for serialization of models using inheritance.
# Regression for #7202, #7350
class AbstractBaseModel(models.Model):
    parent_data = models.IntegerField()
    class Meta:
        abstract = True

class InheritAbstractModel(AbstractBaseModel):
    child_data = models.IntegerField()

class BaseModel(models.Model):
    parent_data = models.IntegerField()

class InheritBaseModel(BaseModel):
    child_data = models.IntegerField()

class ExplicitInheritBaseModel(BaseModel):
    parent = models.OneToOneField(BaseModel)
    child_data = models.IntegerField()

class ProxyBaseModel(BaseModel):
    class Meta:
        proxy = True

class ProxyProxyBaseModel(ProxyBaseModel):
    class Meta:
        proxy = True

class LengthModel(models.Model):
    data = models.IntegerField()

    def __len__(self):
        return self.data

