#  Licensed to Elasticsearch B.V. under one or more contributor
#  license agreements. See the NOTICE file distributed with
#  this work for additional information regarding copyright
#  ownership. Elasticsearch B.V. licenses this file to you under
#  the Apache License, Version 2.0 (the "License"); you may
#  not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
# 	http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing,
#  software distributed under the License is distributed on an
#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
#  KIND, either express or implied.  See the License for the
#  specific language governing permissions and limitations
#  under the License.

from datetime import datetime
from typing import Any

from pytest import raises

from elasticsearch.dsl import (
    Date,
    Document,
    InnerDoc,
    Integer,
    Nested,
    Object,
    Text,
    mapped_field,
)
from elasticsearch.dsl.exceptions import ValidationException


class Author(InnerDoc):
    name: str
    email: str

    def clean(self) -> None:
        if not self.name:
            raise ValidationException("name is missing")
        if not self.email:
            raise ValidationException("email is missing")
        elif self.name.lower() not in self.email:
            raise ValidationException("Invalid email!")


class BlogPost(Document):
    authors = Nested(Author, required=True)
    created = Date()
    inner = Object()


class BlogPostWithStatus(Document):
    published: bool = mapped_field(init=False)


class AutoNowDate(Date):
    def clean(self, data: Any) -> Any:
        if data is None:
            data = datetime.now()
        return super().clean(data)


class Log(Document):
    timestamp = AutoNowDate(required=True)
    data = Text()


def test_required_int_can_be_0() -> None:
    class DT(Document):
        i = Integer(required=True)

    dt = DT(i=0)
    dt.full_clean()


def test_required_field_cannot_be_empty_list() -> None:
    class DT(Document):
        i = Integer(required=True)

    dt = DT(i=[])
    with raises(ValidationException):
        dt.full_clean()


def test_validation_works_for_lists_of_values() -> None:
    class DT(Document):
        i = Date(required=True)

    dt = DT(i=[datetime.now(), "not date"])
    with raises(ValidationException):
        dt.full_clean()

    dt = DT(i=[datetime.now(), datetime.now()])
    dt.full_clean()


def test_field_with_custom_clean() -> None:
    l = Log()
    l.full_clean()

    assert isinstance(l.timestamp, datetime)


def test_empty_object() -> None:
    d = BlogPost(authors=[{"name": "Honza", "email": "honza@elastic.co"}])
    d.inner = {}  # type: ignore[assignment]

    d.full_clean()


def test_missing_required_field_raises_validation_exception() -> None:
    d = BlogPost()
    with raises(ValidationException):
        d.full_clean()

    d = BlogPost()
    d.authors.append({"name": "Honza"})
    with raises(ValidationException):
        d.full_clean()

    d = BlogPost()
    d.authors.append({"name": "Honza", "email": "honza@elastic.co"})
    d.full_clean()


def test_boolean_doesnt_treat_false_as_empty() -> None:
    d = BlogPostWithStatus()
    with raises(ValidationException):
        d.full_clean()
    d.published = False
    d.full_clean()
    d.published = True
    d.full_clean()


def test_custom_validation_on_nested_gets_run() -> None:
    d = BlogPost(authors=[Author(name="Honza", email="king@example.com")], created=None)

    assert isinstance(d.authors[0], Author)  # type: ignore[index]

    with raises(ValidationException):
        d.full_clean()


def test_accessing_known_fields_returns_empty_value() -> None:
    d = BlogPost()

    assert [] == d.authors

    d.authors.append({})
    assert None is d.authors[0].name  # type: ignore[index]
    assert None is d.authors[0].email


def test_empty_values_are_not_serialized() -> None:
    d = BlogPost(authors=[{"name": "Honza", "email": "honza@elastic.co"}], created=None)

    d.full_clean()
    assert d.to_dict() == {"authors": [{"name": "Honza", "email": "honza@elastic.co"}]}