from sqlalchemy import and_
from sqlalchemy import exc
from sqlalchemy import ForeignKey
from sqlalchemy import func
from sqlalchemy import INT
from sqlalchemy import Integer
from sqlalchemy import MetaData
from sqlalchemy import Sequence
from sqlalchemy import sql
from sqlalchemy import String
from sqlalchemy import testing
from sqlalchemy import VARCHAR
from sqlalchemy.testing import assert_raises_message
from sqlalchemy.testing import engines
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
from sqlalchemy.testing import is_
from sqlalchemy.testing.schema import Column
from sqlalchemy.testing.schema import Table


class InsertExecTest(fixtures.TablesTest):
    __backend__ = True

    @classmethod
    def define_tables(cls, metadata):
        Table(
            "users",
            metadata,
            Column(
                "user_id", INT, primary_key=True, test_needs_autoincrement=True
            ),
            Column("user_name", VARCHAR(20)),
            test_needs_acid=True,
        )

    @testing.requires.multivalues_inserts
    def test_multivalues_insert(self):
        users = self.tables.users
        users.insert(
            values=[
                {"user_id": 7, "user_name": "jack"},
                {"user_id": 8, "user_name": "ed"},
            ]
        ).execute()
        rows = users.select().order_by(users.c.user_id).execute().fetchall()
        eq_(rows[0], (7, "jack"))
        eq_(rows[1], (8, "ed"))
        users.insert(values=[(9, "jack"), (10, "ed")]).execute()
        rows = users.select().order_by(users.c.user_id).execute().fetchall()
        eq_(rows[2], (9, "jack"))
        eq_(rows[3], (10, "ed"))

    def test_insert_heterogeneous_params(self):
        """test that executemany parameters are asserted to match the
        parameter set of the first."""
        users = self.tables.users

        assert_raises_message(
            exc.StatementError,
            r"\(sqlalchemy.exc.InvalidRequestError\) A value is required for "
            "bind parameter 'user_name', in "
            "parameter group 2\n"
            r"\[SQL: u?INSERT INTO users",
            users.insert().execute,
            {"user_id": 7, "user_name": "jack"},
            {"user_id": 8, "user_name": "ed"},
            {"user_id": 9},
        )

        # this succeeds however.   We aren't yet doing
        # a length check on all subsequent parameters.
        users.insert().execute(
            {"user_id": 7}, {"user_id": 8, "user_name": "ed"}, {"user_id": 9}
        )

    def _test_lastrow_accessor(self, table_, values, assertvalues):
        """Tests the inserted_primary_key and lastrow_has_id() functions."""

        def insert_values(engine, table_, values):
            """
            Inserts a row into a table, returns the full list of values
            INSERTed including defaults that fired off on the DB side and
            detects rows that had defaults and post-fetches.
            """

            # verify implicit_returning is working
            if engine.dialect.implicit_returning:
                ins = table_.insert()
                comp = ins.compile(engine, column_keys=list(values))
                if not set(values).issuperset(
                    c.key for c in table_.primary_key
                ):
                    is_(bool(comp.returning), True)

            result = engine.execute(table_.insert(), **values)
            ret = values.copy()

            for col, id_ in zip(
                table_.primary_key, result.inserted_primary_key
            ):
                ret[col.key] = id_

            if result.lastrow_has_defaults():
                criterion = and_(
                    *[
                        col == id_
                        for col, id_ in zip(
                            table_.primary_key, result.inserted_primary_key
                        )
                    ]
                )
                row = engine.execute(table_.select(criterion)).first()
                for c in table_.c:
                    ret[c.key] = row._mapping[c]
            return ret

        if testing.against("firebird", "postgresql", "oracle", "mssql"):
            assert testing.db.dialect.implicit_returning

        if testing.db.dialect.implicit_returning:
            test_engines = [
                engines.testing_engine(options={"implicit_returning": False}),
                engines.testing_engine(options={"implicit_returning": True}),
            ]
        else:
            test_engines = [testing.db]

        for engine in test_engines:
            try:
                table_.create(bind=engine, checkfirst=True)
                i = insert_values(engine, table_, values)
                eq_(i, assertvalues)
            finally:
                table_.drop(bind=engine)

    @testing.skip_if("sqlite")
    def test_lastrow_accessor_one(self):
        metadata = MetaData()
        self._test_lastrow_accessor(
            Table(
                "t1",
                metadata,
                Column(
                    "id",
                    Integer,
                    primary_key=True,
                    test_needs_autoincrement=True,
                ),
                Column("foo", String(30), primary_key=True),
            ),
            {"foo": "hi"},
            {"id": 1, "foo": "hi"},
        )

    @testing.skip_if("sqlite")
    def test_lastrow_accessor_two(self):
        metadata = MetaData()
        self._test_lastrow_accessor(
            Table(
                "t2",
                metadata,
                Column(
                    "id",
                    Integer,
                    primary_key=True,
                    test_needs_autoincrement=True,
                ),
                Column("foo", String(30), primary_key=True),
                Column("bar", String(30), server_default="hi"),
            ),
            {"foo": "hi"},
            {"id": 1, "foo": "hi", "bar": "hi"},
        )

    def test_lastrow_accessor_three(self):
        metadata = MetaData()
        self._test_lastrow_accessor(
            Table(
                "t3",
                metadata,
                Column("id", String(40), primary_key=True),
                Column("foo", String(30), primary_key=True),
                Column("bar", String(30)),
            ),
            {"id": "hi", "foo": "thisisfoo", "bar": "thisisbar"},
            {"id": "hi", "foo": "thisisfoo", "bar": "thisisbar"},
        )

    @testing.requires.sequences
    def test_lastrow_accessor_four(self):
        metadata = MetaData()
        self._test_lastrow_accessor(
            Table(
                "t4",
                metadata,
                Column(
                    "id",
                    Integer,
                    Sequence("t4_id_seq", optional=True),
                    primary_key=True,
                ),
                Column("foo", String(30), primary_key=True),
                Column("bar", String(30), server_default="hi"),
            ),
            {"foo": "hi", "id": 1},
            {"id": 1, "foo": "hi", "bar": "hi"},
        )

    def test_lastrow_accessor_five(self):
        metadata = MetaData()
        self._test_lastrow_accessor(
            Table(
                "t5",
                metadata,
                Column("id", String(10), primary_key=True),
                Column("bar", String(30), server_default="hi"),
            ),
            {"id": "id1"},
            {"id": "id1", "bar": "hi"},
        )

    @testing.skip_if("sqlite")
    def test_lastrow_accessor_six(self):
        metadata = MetaData()
        self._test_lastrow_accessor(
            Table(
                "t6",
                metadata,
                Column(
                    "id",
                    Integer,
                    primary_key=True,
                    test_needs_autoincrement=True,
                ),
                Column("bar", Integer, primary_key=True),
            ),
            {"bar": 0},
            {"id": 1, "bar": 0},
        )

    # TODO: why not in the sqlite suite?
    @testing.only_on("sqlite+pysqlite")
    @testing.provide_metadata
    def test_lastrowid_zero(self):
        from sqlalchemy.dialects import sqlite

        eng = engines.testing_engine()

        class ExcCtx(sqlite.base.SQLiteExecutionContext):
            def get_lastrowid(self):
                return 0

        eng.dialect.execution_ctx_cls = ExcCtx
        t = Table(
            "t",
            self.metadata,
            Column("x", Integer, primary_key=True),
            Column("y", Integer),
        )
        t.create(eng)
        r = eng.execute(t.insert().values(y=5))
        eq_(r.inserted_primary_key, [0])

    @testing.fails_on(
        "sqlite", "sqlite autoincrement doesn't work with composite pks"
    )
    @testing.provide_metadata
    def test_misordered_lastrow(self):
        metadata = self.metadata

        related = Table(
            "related",
            metadata,
            Column("id", Integer, primary_key=True),
            mysql_engine="MyISAM",
        )
        t6 = Table(
            "t6",
            metadata,
            Column(
                "manual_id",
                Integer,
                ForeignKey("related.id"),
                primary_key=True,
            ),
            Column(
                "auto_id",
                Integer,
                primary_key=True,
                test_needs_autoincrement=True,
            ),
            mysql_engine="MyISAM",
        )

        metadata.create_all()
        r = related.insert().values(id=12).execute()
        id_ = r.inserted_primary_key[0]
        eq_(id_, 12)

        r = t6.insert().values(manual_id=id_).execute()
        eq_(r.inserted_primary_key, [12, 1])

    def test_implicit_id_insert_select_columns(self):
        users = self.tables.users
        stmt = users.insert().from_select(
            (users.c.user_id, users.c.user_name),
            users.select().where(users.c.user_id == 20),
        )

        testing.db.execute(stmt)

    def test_implicit_id_insert_select_keys(self):
        users = self.tables.users
        stmt = users.insert().from_select(
            ["user_id", "user_name"],
            users.select().where(users.c.user_id == 20),
        )

        testing.db.execute(stmt)

    @testing.requires.empty_inserts
    @testing.requires.returning
    def test_no_inserted_pk_on_returning(self):
        users = self.tables.users
        result = testing.db.execute(
            users.insert().returning(users.c.user_id, users.c.user_name)
        )
        assert_raises_message(
            exc.InvalidRequestError,
            r"Can't call inserted_primary_key when returning\(\) is used.",
            getattr,
            result,
            "inserted_primary_key",
        )


class TableInsertTest(fixtures.TablesTest):

    """test for consistent insert behavior across dialects
    regarding the inline() method, lower-case 't' tables.

    """

    run_create_tables = "each"
    __backend__ = True

    @classmethod
    def define_tables(cls, metadata):
        Table(
            "foo",
            metadata,
            Column("id", Integer, Sequence("t_id_seq"), primary_key=True),
            Column("data", String(50)),
            Column("x", Integer),
        )

    def _fixture(self, types=True):
        if types:
            t = sql.table(
                "foo",
                sql.column("id", Integer),
                sql.column("data", String),
                sql.column("x", Integer),
            )
        else:
            t = sql.table(
                "foo", sql.column("id"), sql.column("data"), sql.column("x")
            )
        return t

    def _test(self, stmt, row, returning=None, inserted_primary_key=False):
        r = testing.db.execute(stmt)

        if returning:
            returned = r.first()
            eq_(returned, returning)
        elif inserted_primary_key is not False:
            eq_(r.inserted_primary_key, inserted_primary_key)

        eq_(testing.db.execute(self.tables.foo.select()).first(), row)

    def _test_multi(self, stmt, rows, data):
        testing.db.execute(stmt, rows)
        eq_(
            testing.db.execute(
                self.tables.foo.select().order_by(self.tables.foo.c.id)
            ).fetchall(),
            data,
        )

    @testing.requires.sequences
    def test_explicit_sequence(self):
        t = self._fixture()
        self._test(
            t.insert().values(
                id=func.next_value(Sequence("t_id_seq")), data="data", x=5
            ),
            (1, "data", 5),
        )

    def test_uppercase(self):
        t = self.tables.foo
        self._test(
            t.insert().values(id=1, data="data", x=5),
            (1, "data", 5),
            inserted_primary_key=[1],
        )

    def test_uppercase_inline(self):
        t = self.tables.foo
        self._test(
            t.insert().inline().values(id=1, data="data", x=5),
            (1, "data", 5),
            inserted_primary_key=[1],
        )

    @testing.crashes(
        "mssql+pyodbc",
        "Pyodbc + SQL Server + Py3K, some decimal handling issue",
    )
    def test_uppercase_inline_implicit(self):
        t = self.tables.foo
        self._test(
            t.insert().inline().values(data="data", x=5),
            (1, "data", 5),
            inserted_primary_key=[None],
        )

    def test_uppercase_implicit(self):
        t = self.tables.foo
        self._test(
            t.insert().values(data="data", x=5),
            (1, "data", 5),
            inserted_primary_key=[1],
        )

    def test_uppercase_direct_params(self):
        t = self.tables.foo
        self._test(
            t.insert().values(id=1, data="data", x=5),
            (1, "data", 5),
            inserted_primary_key=[1],
        )

    @testing.requires.returning
    def test_uppercase_direct_params_returning(self):
        t = self.tables.foo
        self._test(
            t.insert().values(id=1, data="data", x=5).returning(t.c.id, t.c.x),
            (1, "data", 5),
            returning=(1, 5),
        )

    @testing.fails_on(
        "mssql", "lowercase table doesn't support identity insert disable"
    )
    def test_direct_params(self):
        t = self._fixture()
        self._test(
            t.insert().values(id=1, data="data", x=5),
            (1, "data", 5),
            inserted_primary_key=[],
        )

    @testing.fails_on(
        "mssql", "lowercase table doesn't support identity insert disable"
    )
    @testing.requires.returning
    def test_direct_params_returning(self):
        t = self._fixture()
        self._test(
            t.insert().values(id=1, data="data", x=5).returning(t.c.id, t.c.x),
            (1, "data", 5),
            returning=(1, 5),
        )

    @testing.requires.emulated_lastrowid
    def test_implicit_pk(self):
        t = self._fixture()
        self._test(
            t.insert().values(data="data", x=5),
            (1, "data", 5),
            inserted_primary_key=[],
        )

    @testing.requires.emulated_lastrowid
    def test_implicit_pk_multi_rows(self):
        t = self._fixture()
        self._test_multi(
            t.insert(),
            [
                {"data": "d1", "x": 5},
                {"data": "d2", "x": 6},
                {"data": "d3", "x": 7},
            ],
            [(1, "d1", 5), (2, "d2", 6), (3, "d3", 7)],
        )

    @testing.requires.emulated_lastrowid
    def test_implicit_pk_inline(self):
        t = self._fixture()
        self._test(
            t.insert().inline().values(data="data", x=5),
            (1, "data", 5),
            inserted_primary_key=[],
        )
