from unittest.mock import call
from unittest.mock import Mock

from sqlalchemy import exc
from sqlalchemy.orm import collections
from sqlalchemy.orm import relationship
from sqlalchemy.orm import validates
from sqlalchemy.testing import assert_raises
from sqlalchemy.testing import assert_raises_message
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
from sqlalchemy.testing import ne_
from sqlalchemy.testing.fixtures import fixture_session
from test.orm import _fixtures


class ValidatorTest(_fixtures.FixtureTest):
    def test_scalar(self):
        users = self.tables.users
        canary = Mock()

        class User(fixtures.ComparableEntity):
            @validates("name")
            def validate_name(self, key, name):
                canary(key, name)
                ne_(name, "fred")
                return name + " modified"

        self.mapper_registry.map_imperatively(User, users)
        sess = fixture_session()
        u1 = User(name="ed")
        eq_(u1.name, "ed modified")
        assert_raises(AssertionError, setattr, u1, "name", "fred")
        eq_(u1.name, "ed modified")
        eq_(canary.mock_calls, [call("name", "ed"), call("name", "fred")])

        sess.add(u1)
        sess.commit()

        eq_(
            sess.query(User).filter_by(name="ed modified").one(),
            User(name="ed"),
        )

    def test_collection(self):
        users, addresses, Address = (
            self.tables.users,
            self.tables.addresses,
            self.classes.Address,
        )

        canary = Mock()

        class User(fixtures.ComparableEntity):
            @validates("addresses")
            def validate_address(self, key, ad):
                canary(key, ad)
                assert "@" in ad.email_address
                return ad

        self.mapper_registry.map_imperatively(
            User, users, properties={"addresses": relationship(Address)}
        )
        self.mapper_registry.map_imperatively(Address, addresses)
        sess = fixture_session()
        u1 = User(name="edward")
        a0 = Address(email_address="noemail")
        assert_raises(AssertionError, u1.addresses.append, a0)
        a1 = Address(id=15, email_address="foo@bar.com")
        u1.addresses.append(a1)
        eq_(canary.mock_calls, [call("addresses", a0), call("addresses", a1)])
        sess.add(u1)
        sess.commit()

        eq_(
            sess.query(User).filter_by(name="edward").one(),
            User(
                name="edward", addresses=[Address(email_address="foo@bar.com")]
            ),
        )

    def test_validators_dict(self):
        users, addresses, Address = (
            self.tables.users,
            self.tables.addresses,
            self.classes.Address,
        )

        class User(fixtures.ComparableEntity):
            @validates("name")
            def validate_name(self, key, name):
                ne_(name, "fred")
                return name + " modified"

            @validates("addresses")
            def validate_address(self, key, ad):
                assert "@" in ad.email_address
                return ad

            def simple_function(self, key, value):
                return key, value

        u_m = self.mapper_registry.map_imperatively(
            User, users, properties={"addresses": relationship(Address)}
        )
        self.mapper_registry.map_imperatively(Address, addresses)

        eq_(
            dict((k, v[0].__name__) for k, v in list(u_m.validators.items())),
            {"name": "validate_name", "addresses": "validate_address"},
        )

    def test_validator_w_removes(self):
        users, addresses, Address = (
            self.tables.users,
            self.tables.addresses,
            self.classes.Address,
        )
        canary = Mock()

        class User(fixtures.ComparableEntity):
            @validates("name", include_removes=True)
            def validate_name(self, key, item, remove):
                canary(key, item, remove)
                return item

            @validates("addresses", include_removes=True)
            def validate_address(self, key, item, remove):
                canary(key, item, remove)
                return item

        self.mapper_registry.map_imperatively(
            User, users, properties={"addresses": relationship(Address)}
        )
        self.mapper_registry.map_imperatively(Address, addresses)

        u1 = User()
        u1.name = "ed"
        u1.name = "mary"
        del u1.name
        a1, a2, a3 = Address(), Address(), Address()
        u1.addresses.append(a1)
        u1.addresses.remove(a1)
        u1.addresses = [a1, a2]
        u1.addresses = [a2, a3]

        eq_(
            canary.mock_calls,
            [
                call("name", "ed", False),
                call("name", "mary", False),
                call("name", "mary", True),
                # append a1
                call("addresses", a1, False),
                # remove a1
                call("addresses", a1, True),
                # set to [a1, a2] - this is two appends
                call("addresses", a1, False),
                call("addresses", a2, False),
                # set to [a2, a3] - this is a remove of a1,
                # append of a3.  the appends are first.
                # in 1.2 due to #3896, we also get 'a2' in the
                # validates as it is part of the set
                call("addresses", a2, False),
                call("addresses", a3, False),
                call("addresses", a1, True),
            ],
        )

    def test_validator_bulk_collection_set(self):
        users, addresses, Address = (
            self.tables.users,
            self.tables.addresses,
            self.classes.Address,
        )

        class User(fixtures.ComparableEntity):
            @validates("addresses", include_removes=True)
            def validate_address(self, key, item, remove):
                if not remove:
                    assert isinstance(item, str)
                else:
                    assert isinstance(item, Address)
                item = Address(email_address=item)
                return item

        self.mapper_registry.map_imperatively(
            User, users, properties={"addresses": relationship(Address)}
        )
        self.mapper_registry.map_imperatively(Address, addresses)

        u1 = User()
        u1.addresses.append("e1")
        u1.addresses.append("e2")
        eq_(
            u1.addresses,
            [Address(email_address="e1"), Address(email_address="e2")],
        )
        u1.addresses = ["e3", "e4"]
        eq_(
            u1.addresses,
            [Address(email_address="e3"), Address(email_address="e4")],
        )

    def test_validator_bulk_dict_set(self):
        users, addresses, Address = (
            self.tables.users,
            self.tables.addresses,
            self.classes.Address,
        )

        class User(fixtures.ComparableEntity):
            @validates("addresses", include_removes=True)
            def validate_address(self, key, item, remove):
                if not remove:
                    assert isinstance(item, str)
                else:
                    assert isinstance(item, Address)
                item = Address(email_address=item)
                return item

        self.mapper_registry.map_imperatively(
            User,
            users,
            properties={
                "addresses": relationship(
                    Address,
                    collection_class=collections.attribute_mapped_collection(
                        "email_address"
                    ),
                )
            },
        )
        self.mapper_registry.map_imperatively(Address, addresses)

        u1 = User()
        u1.addresses["e1"] = "e1"
        u1.addresses["e2"] = "e2"
        eq_(
            u1.addresses,
            {
                "e1": Address(email_address="e1"),
                "e2": Address(email_address="e2"),
            },
        )
        u1.addresses = {"e3": "e3", "e4": "e4"}
        eq_(
            u1.addresses,
            {
                "e3": Address(email_address="e3"),
                "e4": Address(email_address="e4"),
            },
        )

    def test_validator_as_callable_object(self):
        """test #6538"""
        users = self.tables.users
        canary = Mock()

        class SomeValidator:
            def __call__(self, obj, key, name):
                canary(key, name)
                ne_(name, "fred")
                return name + " modified"

        class User(fixtures.ComparableEntity):
            sv = validates("name")(SomeValidator())

        self.mapper_registry.map_imperatively(User, users)
        u1 = User(name="ed")
        eq_(u1.name, "ed modified")

    def test_validator_multi_warning(self):
        users = self.tables.users

        class Foo:
            @validates("name")
            def validate_one(self, key, value):
                pass

            @validates("name")
            def validate_two(self, key, value):
                pass

        assert_raises_message(
            exc.InvalidRequestError,
            "A validation function for mapped attribute "
            "'name' on mapper Mapper|Foo|users already exists",
            self.mapper_registry.map_imperatively,
            Foo,
            users,
        )

        class Bar:
            @validates("id")
            def validate_three(self, key, value):
                return value + 10

            @validates("id", "name")
            def validate_four(self, key, value):
                return value + "foo"

        assert_raises_message(
            exc.InvalidRequestError,
            "A validation function for mapped attribute "
            "'name' on mapper Mapper|Bar|users already exists",
            self.mapper_registry.map_imperatively,
            Bar,
            users,
        )

    def test_validator_wo_backrefs_wo_removes(self):
        self._test_validator_backrefs(False, False)

    def test_validator_wo_backrefs_w_removes(self):
        self._test_validator_backrefs(False, True)

    def test_validator_w_backrefs_wo_removes(self):
        self._test_validator_backrefs(True, False)

    def test_validator_w_backrefs_w_removes(self):
        self._test_validator_backrefs(True, True)

    def _test_validator_backrefs(self, include_backrefs, include_removes):
        users, addresses = (self.tables.users, self.tables.addresses)
        canary = Mock()

        class User(fixtures.ComparableEntity):

            if include_removes:

                @validates(
                    "addresses",
                    include_removes=True,
                    include_backrefs=include_backrefs,
                )
                def validate_address(self, key, item, remove):
                    canary(key, item, remove)
                    return item

            else:

                @validates(
                    "addresses",
                    include_removes=False,
                    include_backrefs=include_backrefs,
                )
                def validate_address(self, key, item):
                    canary(key, item)
                    return item

        class Address(fixtures.ComparableEntity):
            if include_removes:

                @validates(
                    "user",
                    include_backrefs=include_backrefs,
                    include_removes=True,
                )
                def validate_user(self, key, item, remove):
                    canary(key, item, remove)
                    return item

            else:

                @validates("user", include_backrefs=include_backrefs)
                def validate_user(self, key, item):
                    canary(key, item)
                    return item

        self.mapper_registry.map_imperatively(
            User,
            users,
            properties={"addresses": relationship(Address, backref="user")},
        )
        self.mapper_registry.map_imperatively(Address, addresses)

        u1 = User()
        u2 = User()
        a1, a2 = Address(), Address()

        # 3 append/set, two removes
        u1.addresses.append(a1)
        u1.addresses.append(a2)
        a2.user = u2
        del a1.user
        u2.addresses.remove(a2)

        # copy, so that generation of the
        # comparisons don't get caught
        calls = list(canary.mock_calls)

        if include_backrefs:
            if include_removes:
                eq_(
                    calls,
                    [
                        # append #1
                        call("addresses", Address(), False),
                        # backref for append
                        call("user", User(addresses=[]), False),
                        # append #2
                        call("addresses", Address(user=None), False),
                        # backref for append
                        call("user", User(addresses=[]), False),
                        # assign a2.user = u2
                        call("user", User(addresses=[]), False),
                        # backref for u1.addresses.remove(a2)
                        call("addresses", Address(user=None), True),
                        # backref for u2.addresses.append(a2)
                        call("addresses", Address(user=None), False),
                        # del a1.user
                        call("user", User(addresses=[]), True),
                        # backref for u1.addresses.remove(a1)
                        call("addresses", Address(), True),
                        # u2.addresses.remove(a2)
                        call("addresses", Address(user=None), True),
                        # backref for a2.user = None
                        call("user", None, False),
                    ],
                )
            else:
                eq_(
                    calls,
                    [
                        call("addresses", Address()),
                        call("user", User(addresses=[])),
                        call("addresses", Address(user=None)),
                        call("user", User(addresses=[])),
                        call("user", User(addresses=[])),
                        call("addresses", Address(user=None)),
                        call("user", None),
                    ],
                )
        else:
            if include_removes:
                eq_(
                    calls,
                    [
                        call("addresses", Address(), False),
                        call("addresses", Address(user=None), False),
                        call("user", User(addresses=[]), False),
                        call("user", User(addresses=[]), True),
                        call("addresses", Address(user=None), True),