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 literal
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 ExpectExpr:
    def __init__(self, element):
        self.element = element

    def __clause_element__(self):
        return self.element


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
    @testing.combinations("string", "column", "expect", argnames="keytype")
    def test_multivalues_insert(self, connection, keytype):

        users = self.tables.users

        if keytype == "string":
            user_id, user_name = "user_id", "user_name"
        elif keytype == "column":
            user_id, user_name = users.c.user_id, users.c.user_name
        elif keytype == "expect":
            user_id, user_name = ExpectExpr(users.c.user_id), ExpectExpr(
                users.c.user_name
            )
        else:
            assert False

        connection.execute(
            users.insert().values(
                [
                    {user_id: 7, user_name: "jack"},
                    {user_id: 8, user_name: "ed"},
                ]
            )
        )
        rows = connection.execute(
            users.select().order_by(users.c.user_id)
        ).all()
        eq_(rows[0], (7, "jack"))
        eq_(rows[1], (8, "ed"))
        connection.execute(users.insert().values([(9, "jack"), (10, "ed")]))
        rows = connection.execute(
            users.select().order_by(users.c.user_id)
        ).all()
        eq_(rows[2], (9, "jack"))
        eq_(rows[3], (10, "ed"))

    def test_insert_heterogeneous_params(self, connection):
        """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",
            connection.execute,
            users.insert(),
            [
                {"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.
        connection.execute(
            users.insert(),
            [
                {"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)

            with engine.begin() as connection:
                result = connection.execute(table_.insert(), values)
                ret = values.copy()

                ipk = result.inserted_primary_key
                for col, id_ in zip(table_.primary_key, ipk):
                    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 = connection.execute(
                        table_.select().where(criterion)
                    ).first()
                    for c in table_.c:
                        ret[c.key] = row._mapping[c]
            return ret, ipk

        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, ipk = insert_values(engine, table_, values)
                eq_(i, assertvalues)

                # named tuple tests
                for col in table_.primary_key:
                    eq_(getattr(ipk, col.key), assertvalues[col.key])
                    eq_(ipk._mapping[col.key], assertvalues[col.key])

                eq_(
                    ipk._fields, tuple([col.key for col in table_.primary_key])
                )

            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"},
        )

    @testing.requires.sequences
    def test_lastrow_accessor_four_a(self):
        metadata = MetaData()
        self._test_lastrow_accessor(
            Table(
                "t4",
                metadata,
                Column(
                    "id",
                    Integer,
                    Sequence("t4_id_seq"),
                    primary_key=True,
                ),
                Column("foo", String(30)),
            ),
            {"foo": "hi"},
            {"id": 1, "foo": "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),
        )
        with eng.begin() as conn:
            t.create(conn)
            r = conn.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, connection):
        metadata = self.metadata

        related = Table(
            "related",
            metadata,
            Column("id", Integer, primary_key=True),
            mysql_engine="MyISAM",
            mariadb_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",
            mariadb_engine="MyISAM",
        )

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

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

    def test_implicit_id_insert_select_columns(self, connection):
        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),
        )

        r = connection.execute(stmt)
        eq_(r.inserted_primary_key, (None,))

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

        r = connection.execute(stmt)
        eq_(r.inserted_primary_key, (None,))

    @testing.requires.empty_inserts
    @testing.requires.returning
    def test_no_inserted_pk_on_returning(self, connection):
        users = self.tables.users
        result = connection.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),
        )

        Table(
            "foo_no_seq",
            metadata,
            # note this will have full AUTO INCREMENT on MariaDB
            # whereas "foo" will not due to sequence support
            Column(
                "id",
                Integer,
                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,
        connection,
        stmt,
        row,
        returning=None,
        inserted_primary_key=False,
        table=None,
    ):
        r = connection.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)

        if table is None:
            table = self.tables.foo

        eq_(connection.execute(table.select()).first(), row)

    def _test_multi(self, connection, stmt, rows, data):
        connection.execute(stmt, rows)
        eq_(
            connection.execute(
                self.tables.foo.select().order_by(self.tables.foo.c.id)
            ).all(),
            data,
        )

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

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

    def test_uppercase_inline(self, connection):
        t = self.tables.foo
        self._test(
            connection,
            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, connection):
        t = self.tables.foo
        self._test(
            connection,
            t.insert().inline().values(data="data", x=5),
            (1, "data", 5),
            inserted_primary_key=(None,),
        )

    def test_uppercase_implicit(self, connection):
        t = self.tables.foo
        self._test(
            connection,
            t.insert().values(data="data", x=5),
            (testing.db.dialect.default_sequence_base, "data", 5),
            inserted_primary_key=(testing.db.dialect.default_sequence_base,),
        )

    def test_uppercase_direct_params(self, connection):
        t = self.tables.foo
        self._test(
            connection,
            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, connection):
        t = self.tables.foo
        self._test(
            connection,
            t.insert().values(id=1, data="data", x=5).returning(t.c.id, t.c.x),
            (1, "data", 5),
            returning=(1, 5),
        )

    @testing.requires.sql_expressions_inserted_as_primary_key
    def test_sql_expr_lastrowid(self, connection):

        # see also test.orm.test_unitofwork.py
        # ClauseAttributesTest.test_insert_pk_expression
        t = self.tables.foo_no_seq
        self._test(
            connection,
            t.insert().values(id=literal(5) + 10, data="data", x=5),
            (15, "data", 5),
            inserted_primary_key=(15,),
            table=self.tables.foo_no_seq,
        )

    def test_direct_params(self, connection):
        t = self._fixture()
        self._test(
            connection,
            t.insert().values(id=1, data="data", x=5),
            (1, "data", 5),
            inserted_primary_key=(),
        )

    @testing.requires.returning
    def test_direct_params_returning(self, connection):
        t = self._fixture()
        self._test(
            connection,
            t.insert().values(id=1, data="data", x=5).returning(t.c.id, t.c.x),
            (testing.db.dialect.default_sequence_base, "data", 5),
            returning=(testing.db.dialect.default_sequence_base, 5),
        )

    # there's a non optional Sequence in the metadata, which if the dialect
    # supports sequences, it means the CREATE TABLE should *not* have
    # autoincrement, so the INSERT below would fail because the "t" fixture
    # does not indicate the Sequence
    @testing.fails_if(testing.requires.sequences)
    @testing.requires.emulated_lastrowid
    def test_implicit_pk(self, connection):
        t = self._fixture()
        self._test(
            connection,
            t.insert().values(data="data", x=5),
            (testing.db.dialect.default_sequence_base, "data", 5),
            inserted_primary_key=(),
        )

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

    @testing.fails_if(testing.requires.sequences)
    @testing.requires.emulated_lastrowid
    def test_implicit_pk_inline(self, connection):
        t = self._fixture()
        self._test(
            connection,
            t.insert().inline().values(data="data", x=5),
            (testing.db.dialect.default_sequence_base, "data", 5),
            inserted_primary_key=(),
        )