from collections import namedtuple

import pytest
from django.db import models
from django.utils.translation import ugettext_lazy as _
from py.test import raises

import graphene
from graphene import NonNull
from graphene.relay import ConnectionField, Node
from graphene.types.datetime import Date, DateTime, Time
from graphene.types.json import JSONString

from ..compat import (
    ArrayField,
    HStoreField,
    JSONField,
    PGJSONField,
    MissingType,
    RangeField,
)
from ..converter import (
    convert_django_field,
    convert_django_field_with_choices,
    generate_enum_name,
)
from ..registry import Registry
from ..types import DjangoObjectType
from .models import Article, Film, FilmDetails, Reporter

# from graphene.core.types.custom_scalars import DateTime, Time, JSONString


def assert_conversion(django_field, graphene_field, *args, **kwargs):
    _kwargs = kwargs.copy()
    if "null" not in kwargs:
        _kwargs["null"] = True
    field = django_field(help_text="Custom Help Text", *args, **_kwargs)
    graphene_type = convert_django_field(field)
    assert isinstance(graphene_type, graphene_field)
    field = graphene_type.Field()
    assert field.description == "Custom Help Text"

    _kwargs = kwargs.copy()
    if "null" not in kwargs:
        _kwargs["null"] = False
    nonnull_field = django_field(*args, **_kwargs)
    if not nonnull_field.null:
        nonnull_graphene_type = convert_django_field(nonnull_field)
        nonnull_field = nonnull_graphene_type.Field()
        assert isinstance(nonnull_field.type, graphene.NonNull)
        return nonnull_field
    return field


def test_should_unknown_django_field_raise_exception():
    with raises(Exception) as excinfo:
        convert_django_field(None)
    assert "Don't know how to convert the Django field" in str(excinfo.value)


def test_should_date_time_convert_string():
    assert_conversion(models.DateTimeField, DateTime)


def test_should_date_convert_string():
    assert_conversion(models.DateField, Date)


def test_should_time_convert_string():
    assert_conversion(models.TimeField, Time)


def test_should_char_convert_string():
    assert_conversion(models.CharField, graphene.String)


def test_should_text_convert_string():
    assert_conversion(models.TextField, graphene.String)


def test_should_email_convert_string():
    assert_conversion(models.EmailField, graphene.String)


def test_should_slug_convert_string():
    assert_conversion(models.SlugField, graphene.String)


def test_should_url_convert_string():
    assert_conversion(models.URLField, graphene.String)


def test_should_ipaddress_convert_string():
    assert_conversion(models.GenericIPAddressField, graphene.String)


def test_should_file_convert_string():
    assert_conversion(models.FileField, graphene.String)


def test_should_image_convert_string():
    assert_conversion(models.ImageField, graphene.String)


def test_should_file_path_field_convert_string():
    assert_conversion(models.FilePathField, graphene.String)


def test_should_auto_convert_id():
    assert_conversion(models.AutoField, graphene.ID, primary_key=True)


def test_should_uuid_convert_id():
    assert_conversion(models.UUIDField, graphene.UUID)


def test_should_auto_convert_duration():
    assert_conversion(models.DurationField, graphene.Float)


def test_should_positive_integer_convert_int():
    assert_conversion(models.PositiveIntegerField, graphene.Int)


def test_should_positive_small_convert_int():
    assert_conversion(models.PositiveSmallIntegerField, graphene.Int)


def test_should_small_integer_convert_int():
    assert_conversion(models.SmallIntegerField, graphene.Int)


def test_should_big_integer_convert_int():
    assert_conversion(models.BigIntegerField, graphene.Int)


def test_should_integer_convert_int():
    assert_conversion(models.IntegerField, graphene.Int)


def test_should_boolean_convert_boolean():
    assert_conversion(models.BooleanField, graphene.Boolean, null=True)


def test_should_boolean_convert_non_null_boolean():
    field = assert_conversion(models.BooleanField, graphene.Boolean, null=False)
    assert isinstance(field.type, graphene.NonNull)
    assert field.type.of_type == graphene.Boolean


def test_should_nullboolean_convert_boolean():
    assert_conversion(models.NullBooleanField, graphene.Boolean)


def test_field_with_choices_convert_enum():
    field = models.CharField(
        help_text="Language", choices=(("es", "Spanish"), ("en", "English"))
    )

    class TranslatedModel(models.Model):
        language = field

        class Meta:
            app_label = "test"

    graphene_type = convert_django_field_with_choices(field)
    assert isinstance(graphene_type, graphene.Enum)
    assert graphene_type._meta.name == "TranslatedModelLanguage"
    assert graphene_type._meta.enum.__members__["ES"].value == "es"
    assert graphene_type._meta.enum.__members__["ES"].description == "Spanish"
    assert graphene_type._meta.enum.__members__["EN"].value == "en"
    assert graphene_type._meta.enum.__members__["EN"].description == "English"


def test_field_with_grouped_choices():
    field = models.CharField(
        help_text="Language",
        choices=(("Europe", (("es", "Spanish"), ("en", "English"))),),
    )

    class GroupedChoicesModel(models.Model):
        language = field

        class Meta:
            app_label = "test"

    convert_django_field_with_choices(field)


def test_field_with_choices_gettext():
    field = models.CharField(
        help_text="Language", choices=(("es", _("Spanish")), ("en", _("English")))
    )

    class TranslatedChoicesModel(models.Model):
        language = field

        class Meta:
            app_label = "test"

    convert_django_field_with_choices(field)


def test_field_with_choices_collision():
    field = models.CharField(
        help_text="Timezone",
        choices=(
            ("Etc/GMT+1+2", "Fake choice to produce double collision"),
            ("Etc/GMT+1", "Greenwich Mean Time +1"),
            ("Etc/GMT-1", "Greenwich Mean Time -1"),
        ),
    )

    class CollisionChoicesModel(models.Model):
        timezone = field

        class Meta:
            app_label = "test"

    convert_django_field_with_choices(field)


def test_field_with_choices_convert_enum_false():
    field = models.CharField(
        help_text="Language", choices=(("es", "Spanish"), ("en", "English"))
    )

    class TranslatedModel(models.Model):
        language = field

        class Meta:
            app_label = "test"

    graphene_type = convert_django_field_with_choices(
        field, convert_choices_to_enum=False
    )
    assert isinstance(graphene_type, graphene.String)


def test_should_float_convert_float():
    assert_conversion(models.FloatField, graphene.Float)


def test_should_manytomany_convert_connectionorlist():
    registry = Registry()
    dynamic_field = convert_django_field(Reporter._meta.local_many_to_many[0], registry)
    assert not dynamic_field.get_type()


def test_should_manytomany_convert_connectionorlist_list():
    class A(DjangoObjectType):
        class Meta:
            model = Reporter

    graphene_field = convert_django_field(
        Reporter._meta.local_many_to_many[0], A._meta.registry
    )
    assert isinstance(graphene_field, graphene.Dynamic)
    dynamic_field = graphene_field.get_type()
    assert isinstance(dynamic_field, graphene.Field)
    # A NonNull List of NonNull A ([A!]!)
    # https://github.com/graphql-python/graphene-django/issues/448
    assert isinstance(dynamic_field.type, NonNull)
    assert isinstance(dynamic_field.type.of_type, graphene.List)
    assert isinstance(dynamic_field.type.of_type.of_type, NonNull)
    assert dynamic_field.type.of_type.of_type.of_type == A


def test_should_manytomany_convert_connectionorlist_connection():
    class A(DjangoObjectType):
        class Meta:
            model = Reporter
            interfaces = (Node,)

    graphene_field = convert_django_field(
        Reporter._meta.local_many_to_many[0], A._meta.registry
    )
    assert isinstance(graphene_field, graphene.Dynamic)
    dynamic_field = graphene_field.get_type()
    assert isinstance(dynamic_field, ConnectionField)
    assert dynamic_field.type.of_type == A._meta.connection


def test_should_manytoone_convert_connectionorlist():
    class A(DjangoObjectType):
        class Meta:
            model = Article

    graphene_field = convert_django_field(Reporter.articles.rel, A._meta.registry)
    assert isinstance(graphene_field, graphene.Dynamic)
    dynamic_field = graphene_field.get_type()
    assert isinstance(dynamic_field, graphene.Field)
    # a NonNull List of NonNull A ([A!]!)
    assert isinstance(dynamic_field.type, NonNull)
    assert isinstance(dynamic_field.type.of_type, graphene.List)
    assert isinstance(dynamic_field.type.of_type.of_type, NonNull)
    assert dynamic_field.type.of_type.of_type.of_type == A


def test_should_onetoone_reverse_convert_model():
    class A(DjangoObjectType):
        class Meta:
            model = FilmDetails

    graphene_field = convert_django_field(Film.details.related, A._meta.registry)
    assert isinstance(graphene_field, graphene.Dynamic)
    dynamic_field = graphene_field.get_type()
    assert isinstance(dynamic_field, graphene.Field)
    assert dynamic_field.type == A


@pytest.mark.skipif(ArrayField is MissingType, reason="ArrayField should exist")
def test_should_postgres_array_convert_list():
    field = assert_conversion(
        ArrayField, graphene.List, models.CharField(max_length=100)
    )
    assert isinstance(field.type, graphene.NonNull)
    assert isinstance(field.type.of_type, graphene.List)
    assert isinstance(field.type.of_type.of_type, graphene.NonNull)
    assert field.type.of_type.of_type.of_type == graphene.String

    field = assert_conversion(
        ArrayField, graphene.List, models.CharField(max_length=100, null=True)
    )
    assert isinstance(field.type, graphene.NonNull)
    assert isinstance(field.type.of_type, graphene.List)
    assert field.type.of_type.of_type == graphene.String


@pytest.mark.skipif(ArrayField is MissingType, reason="ArrayField should exist")
def test_should_postgres_array_multiple_convert_list():
    field = assert_conversion(
        ArrayField, graphene.List, ArrayField(models.CharField(max_length=100))
    )
    assert isinstance(field.type, graphene.NonNull)
    assert isinstance(field.type.of_type, graphene.List)
    assert isinstance(field.type.of_type.of_type, graphene.List)
    assert isinstance(field.type.of_type.of_type.of_type, graphene.NonNull)
    assert field.type.of_type.of_type.of_type.of_type == graphene.String

    field = assert_conversion(
        ArrayField,
        graphene.List,
        ArrayField(models.CharField(max_length=100, null=True)),
    )
    assert isinstance(field.type, graphene.NonNull)
    assert isinstance(field.type.of_type, graphene.List)
    assert isinstance(field.type.of_type.of_type, graphene.List)
    assert field.type.of_type.of_type.of_type == graphene.String


@pytest.mark.skipif(HStoreField is MissingType, reason="HStoreField should exist")
def test_should_postgres_hstore_convert_string():
    assert_conversion(HStoreField, JSONString)


@pytest.mark.skipif(PGJSONField is MissingType, reason="PGJSONField should exist")
def test_should_postgres_json_convert_string():
    assert_conversion(PGJSONField, JSONString)


@pytest.mark.skipif(JSONField is MissingType, reason="JSONField should exist")
def test_should_json_convert_string():
    assert_conversion(JSONField, JSONString)


@pytest.mark.skipif(RangeField is MissingType, reason="RangeField should exist")
def test_should_postgres_range_convert_list():
    from django.contrib.postgres.fields import IntegerRangeField

    field = assert_conversion(IntegerRangeField, graphene.List)
    assert isinstance(field.type, graphene.NonNull)
    assert isinstance(field.type.of_type, graphene.List)
    assert isinstance(field.type.of_type.of_type, graphene.NonNull)
    assert field.type.of_type.of_type.of_type == graphene.Int


def test_generate_enum_name(graphene_settings):
    MockDjangoModelMeta = namedtuple("DjangoMeta", ["app_label", "object_name"])
    graphene_settings.DJANGO_CHOICE_FIELD_ENUM_V3_NAMING = True

    # Simple case
    field = graphene.Field(graphene.String, name="type")
    model_meta = MockDjangoModelMeta(app_label="users", object_name="User")
    assert generate_enum_name(model_meta, field) == "UsersUserTypeChoices"

    # More complicated multiple work case
    field = graphene.Field(graphene.String, name="fizz_buzz")
    model_meta = MockDjangoModelMeta(
        app_label="some_long_app_name", object_name="SomeObject"
    )
    assert (
        generate_enum_name(model_meta, field)
        == "SomeLongAppNameSomeObjectFizzBuzzChoices"
    )