"""
XX. Generating HTML forms from models

This is mostly just a reworking of the ``form_for_model``/``form_for_instance``
tests to use ``ModelForm``. As such, the text may not make sense in all cases,
and the examples are probably a poor fit for the ``ModelForm`` syntax. In other
words, most of these tests should be rewritten.
"""
from __future__ import unicode_literals

import datetime
import os
import tempfile
import uuid

from django.core import validators
from django.core.exceptions import ValidationError
from django.core.files.storage import FileSystemStorage
from django.db import models
from django.utils import six
from django.utils._os import upath
from django.utils.encoding import python_2_unicode_compatible
from django.utils.six.moves import range

temp_storage_dir = tempfile.mkdtemp()
temp_storage = FileSystemStorage(temp_storage_dir)

ARTICLE_STATUS = (
    (1, 'Draft'),
    (2, 'Pending'),
    (3, 'Live'),
)

ARTICLE_STATUS_CHAR = (
    ('d', 'Draft'),
    ('p', 'Pending'),
    ('l', 'Live'),
)


class Person(models.Model):
    name = models.CharField(max_length=100)


@python_2_unicode_compatible
class Category(models.Model):
    name = models.CharField(max_length=20)
    slug = models.SlugField(max_length=20)
    url = models.CharField('The URL', max_length=40)

    def __str__(self):
        return self.name

    def __repr__(self):
        return self.__str__()


@python_2_unicode_compatible
class Writer(models.Model):
    name = models.CharField(max_length=50, help_text='Use both first and last names.')

    class Meta:
        ordering = ('name',)

    def __str__(self):
        return self.name


@python_2_unicode_compatible
class Article(models.Model):
    headline = models.CharField(max_length=50)
    slug = models.SlugField()
    pub_date = models.DateField()
    created = models.DateField(editable=False)
    writer = models.ForeignKey(Writer, models.CASCADE)
    article = models.TextField()
    categories = models.ManyToManyField(Category, blank=True)
    status = models.PositiveIntegerField(choices=ARTICLE_STATUS, blank=True, null=True)

    def save(self, *args, **kwargs):
        if not self.id:
            self.created = datetime.date.today()
        return super(Article, self).save(*args, **kwargs)

    def __str__(self):
        return self.headline


class ImprovedArticle(models.Model):
    article = models.OneToOneField(Article, models.CASCADE)


class ImprovedArticleWithParentLink(models.Model):
    article = models.OneToOneField(Article, models.CASCADE, parent_link=True)


class BetterWriter(Writer):
    score = models.IntegerField()


@python_2_unicode_compatible
class Publication(models.Model):
    title = models.CharField(max_length=30)
    date_published = models.DateField()

    def __str__(self):
        return self.title


def default_mode():
    return 'di'


def default_category():
    return 3


class PublicationDefaults(models.Model):
    MODE_CHOICES = (('di', 'direct'), ('de', 'delayed'))
    CATEGORY_CHOICES = ((1, 'Games'), (2, 'Comics'), (3, 'Novel'))
    title = models.CharField(max_length=30)
    date_published = models.DateField(default=datetime.date.today)
    datetime_published = models.DateTimeField(default=datetime.datetime(2000, 1, 1))
    mode = models.CharField(max_length=2, choices=MODE_CHOICES, default=default_mode)
    category = models.IntegerField(choices=CATEGORY_CHOICES, default=default_category)
    active = models.BooleanField(default=True)
    file = models.FileField(default='default.txt')


class Author(models.Model):
    publication = models.OneToOneField(Publication, models.SET_NULL, null=True, blank=True)
    full_name = models.CharField(max_length=255)


class Author1(models.Model):
    publication = models.OneToOneField(Publication, models.CASCADE, null=False)
    full_name = models.CharField(max_length=255)


@python_2_unicode_compatible
class WriterProfile(models.Model):
    writer = models.OneToOneField(Writer, models.CASCADE, primary_key=True)
    age = models.PositiveIntegerField()

    def __str__(self):
        return "%s is %s" % (self.writer, self.age)


class Document(models.Model):
    myfile = models.FileField(upload_to='unused', blank=True)


@python_2_unicode_compatible
class TextFile(models.Model):
    description = models.CharField(max_length=20)
    file = models.FileField(storage=temp_storage, upload_to='tests', max_length=15)

    def __str__(self):
        return self.description


class CustomFileField(models.FileField):
    def save_form_data(self, instance, data):
        been_here = getattr(self, 'been_saved', False)
        assert not been_here, "save_form_data called more than once"
        setattr(self, 'been_saved', True)


class CustomFF(models.Model):
    f = CustomFileField(upload_to='unused', blank=True)


class FilePathModel(models.Model):
    path = models.FilePathField(path=os.path.dirname(upath(__file__)), match=r".*\.py$", blank=True)


try:
    from PIL import Image  # NOQA: detect if Pillow is installed

    test_images = True

    @python_2_unicode_compatible
    class ImageFile(models.Model):
        def custom_upload_path(self, filename):
            path = self.path or 'tests'
            return '%s/%s' % (path, filename)

        description = models.CharField(max_length=20)

        # Deliberately put the image field *after* the width/height fields to
        # trigger the bug in #10404 with width/height not getting assigned.
        width = models.IntegerField(editable=False)
        height = models.IntegerField(editable=False)
        image = models.ImageField(storage=temp_storage, upload_to=custom_upload_path,
                                  width_field='width', height_field='height')
        path = models.CharField(max_length=16, blank=True, default='')

        def __str__(self):
            return self.description

    @python_2_unicode_compatible
    class OptionalImageFile(models.Model):
        def custom_upload_path(self, filename):
            path = self.path or 'tests'
            return '%s/%s' % (path, filename)

        description = models.CharField(max_length=20)
        image = models.ImageField(storage=temp_storage, upload_to=custom_upload_path,
                                  width_field='width', height_field='height',
                                  blank=True, null=True)
        width = models.IntegerField(editable=False, null=True)
        height = models.IntegerField(editable=False, null=True)
        path = models.CharField(max_length=16, blank=True, default='')

        def __str__(self):
            return self.description

    class NoExtensionImageFile(models.Model):
        def upload_to(self, filename):
            return 'tests/no_extension'

        description = models.CharField(max_length=20)
        image = models.ImageField(storage=temp_storage, upload_to=upload_to)

        def __str__(self):
            return self.description

except ImportError:
    test_images = False


@python_2_unicode_compatible
class CommaSeparatedInteger(models.Model):
    field = models.CommaSeparatedIntegerField(max_length=20)

    def __str__(self):
        return self.field


class Homepage(models.Model):
    url = models.URLField()


@python_2_unicode_compatible
class Product(models.Model):
    slug = models.SlugField(unique=True)

    def __str__(self):
        return self.slug


@python_2_unicode_compatible
class Price(models.Model):
    price = models.DecimalField(max_digits=10, decimal_places=2)
    quantity = models.PositiveIntegerField()

    def __str__(self):
        return "%s for %s" % (self.quantity, self.price)

    class Meta:
        unique_together = (('price', 'quantity'),)


class Triple(models.Model):
    left = models.IntegerField()
    middle = models.IntegerField()
    right = models.IntegerField()

    class Meta:
        unique_together = (('left', 'middle'), ('middle', 'right'))


class ArticleStatus(models.Model):
    status = models.CharField(max_length=2, choices=ARTICLE_STATUS_CHAR, blank=True, null=True)


@python_2_unicode_compatible
class Inventory(models.Model):
    barcode = models.PositiveIntegerField(unique=True)
    parent = models.ForeignKey('self', models.SET_NULL, to_field='barcode', blank=True, null=True)
    name = models.CharField(blank=False, max_length=20)

    class Meta:
        ordering = ('name',)

    def __str__(self):
        return self.name

    def __repr__(self):
        return self.__str__()


class Book(models.Model):
    title = models.CharField(max_length=40)
    author = models.ForeignKey(Writer, models.SET_NULL, blank=True, null=True)
    special_id = models.IntegerField(blank=True, null=True, unique=True)

    class Meta:
        unique_together = ('title', 'author')


class BookXtra(models.Model):
    isbn = models.CharField(max_length=16, unique=True)
    suffix1 = models.IntegerField(blank=True, default=0)
    suffix2 = models.IntegerField(blank=True, default=0)

    class Meta:
        unique_together = (('suffix1', 'suffix2'))
        abstract = True


class DerivedBook(Book, BookXtra):
    pass


@python_2_unicode_compatible
class ExplicitPK(models.Model):
    key = models.CharField(max_length=20, primary_key=True)
    desc = models.CharField(max_length=20, blank=True, unique=True)

    class Meta:
        unique_together = ('key', 'desc')

    def __str__(self):
        return self.key


@python_2_unicode_compatible
class Post(models.Model):
    title = models.CharField(max_length=50, unique_for_date='posted', blank=True)
    slug = models.CharField(max_length=50, unique_for_year='posted', blank=True)
    subtitle = models.CharField(max_length=50, unique_for_month='posted', blank=True)
    posted = models.DateField()

    def __str__(self):
        return self.title


@python_2_unicode_compatible
class DateTimePost(models.Model):
    title = models.CharField(max_length=50, unique_for_date='posted', blank=True)
    slug = models.CharField(max_length=50, unique_for_year='posted', blank=True)
    subtitle = models.CharField(max_length=50, unique_for_month='posted', blank=True)
    posted = models.DateTimeField(editable=False)

    def __str__(self):
        return self.title


class DerivedPost(Post):
    pass


@python_2_unicode_compatible
class BigInt(models.Model):
    biggie = models.BigIntegerField()

    def __str__(self):
        return six.text_type(self.biggie)


class MarkupField(models.CharField):
    def __init__(self, *args, **kwargs):
        kwargs["max_length"] = 20
        super(MarkupField, self).__init__(*args, **kwargs)

    def formfield(self, **kwargs):
        # don't allow this field to be used in form (real use-case might be
        # that you know the markup will always be X, but it is among an app
        # that allows the user to say it could be something else)
        # regressed at r10062
        return None


class CustomFieldForExclusionModel(models.Model):
    name = models.CharField(max_length=10)
    markup = MarkupField()


class FlexibleDatePost(models.Model):
    title = models.CharField(max_length=50, unique_for_date='posted', blank=True)
    slug = models.CharField(max_length=50, unique_for_year='posted', blank=True)
    subtitle = models.CharField(max_length=50, unique_for_month='posted', blank=True)
    posted = models.DateField(blank=True, null=True)


@python_2_unicode_compatible
class Colour(models.Model):
    name = models.CharField(max_length=50)

    def __iter__(self):
        for number in range(5):
            yield number

    def __str__(self):
        return self.name


class ColourfulItem(models.Model):
    name = models.CharField(max_length=50)
    colours = models.ManyToManyField(Colour)


class CustomErrorMessage(models.Model):
    name1 = models.CharField(
        max_length=50,
        validators=[validators.validate_slug],
        error_messages={'invalid': 'Model custom error message.'},
    )
    name2 = models.CharField(
        max_length=50,
        validators=[validators.validate_slug],
        error_messages={'invalid': 'Model custom error message.'},
    )

    def clean(self):
        if self.name1 == 'FORBIDDEN_VALUE':
            raise ValidationError({'name1': [ValidationError('Model.clean() error messages.')]})
        elif self.name1 == 'FORBIDDEN_VALUE2':
            raise ValidationError({'name1': 'Model.clean() error messages (simpler syntax).'})
        elif self.name1 == 'GLOBAL_ERROR':
            raise ValidationError("Global error message.")


def today_callable_dict():
    return {"last_action__gte": datetime.datetime.today()}


def today_callable_q():
    return models.Q(last_action__gte=datetime.datetime.today())


class Character(models.Model):
    username = models.CharField(max_length=100)
    last_action = models.DateTimeField()


class StumpJoke(models.Model):
    most_recently_fooled = models.ForeignKey(
        Character,
        models.CASCADE,
        limit_choices_to=today_callable_dict,
        related_name="+",
    )
    has_fooled_today = models.ManyToManyField(Character, limit_choices_to=today_callable_q, related_name="+")


# Model for #13776
class Student(models.Model):
    character = models.ForeignKey(Character, models.CASCADE)
    study = models.CharField(max_length=30)


# Model for #639
class Photo(models.Model):
    title = models.CharField(max_length=30)
    image = models.FileField(storage=temp_storage, upload_to='tests')

    # Support code for the tests; this keeps track of how many times save()
    # gets called on each instance.
    def __init__(self, *args, **kwargs):
        super(Photo, self).__init__(*args, **kwargs)
        self._savecount = 0

    def save(self, force_insert=False, force_update=False):
        super(Photo, self).save(force_insert, force_update)
        self._savecount += 1


class UUIDPK(models.Model):
    uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(max_length=30)


# Models for #24706
class StrictAssignmentFieldSpecific(models.Model):
    title = models.CharField(max_length=30)
    _should_error = False

    def __setattr__(self, key, value):
        if self._should_error is True:
            raise ValidationError(message={key: "Cannot set attribute"}, code='invalid')
        super(StrictAssignmentFieldSpecific, self).__setattr__(key, value)


class StrictAssignmentAll(models.Model):
    title = models.CharField(max_length=30)
    _should_error = False

    def __setattr__(self, key, value):
        if self._should_error is True:
            raise ValidationError(message="Cannot set attribute", code='invalid')
        super(StrictAssignmentAll, self).__setattr__(key, value)


# A model with ForeignKey(blank=False, null=True)
class Award(models.Model):
    name = models.CharField(max_length=30)
    character = models.ForeignKey(Character, models.SET_NULL, blank=False, null=True)


class NullableUniqueCharFieldModel(models.Model):
    codename = models.CharField(max_length=50, blank=True, null=True, unique=True)
