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from .. import config
from .. import engines
from .. import fixtures
from ..assertions import eq_
from ..config import requirements
from ..schema import Column
from ..schema import Table
from ... import Integer
from ... import literal
from ... import literal_column
from ... import select
from ... import String


class LastrowidTest(fixtures.TablesTest):
    run_deletes = "each"

    __backend__ = True

    __requires__ = "implements_get_lastrowid", "autoincrement_insert"

    __engine_options__ = {"implicit_returning": False}

    @classmethod
    def define_tables(cls, metadata):
        Table(
            "autoinc_pk",
            metadata,
            Column(
                "id", Integer, primary_key=True, test_needs_autoincrement=True
            ),
            Column("data", String(50)),
        )

        Table(
            "manual_pk",
            metadata,
            Column("id", Integer, primary_key=True, autoincrement=False),
            Column("data", String(50)),
        )

    def _assert_round_trip(self, table, conn):
        row = conn.execute(table.select()).first()
        eq_(row, (config.db.dialect.default_sequence_base, "some data"))

    def test_autoincrement_on_insert(self):

        config.db.execute(self.tables.autoinc_pk.insert(), data="some data")
        self._assert_round_trip(self.tables.autoinc_pk, config.db)

    def test_last_inserted_id(self):

        r = config.db.execute(
            self.tables.autoinc_pk.insert(), data="some data"
        )
        pk = config.db.scalar(select([self.tables.autoinc_pk.c.id]))
        eq_(r.inserted_primary_key, [pk])

    # failed on pypy1.9 but seems to be OK on pypy 2.1
    # @exclusions.fails_if(lambda: util.pypy,
    #                      "lastrowid not maintained after "
    #                      "connection close")
    @requirements.dbapi_lastrowid
    def test_native_lastrowid_autoinc(self):
        r = config.db.execute(
            self.tables.autoinc_pk.insert(), data="some data"
        )
        lastrowid = r.lastrowid
        pk = config.db.scalar(select([self.tables.autoinc_pk.c.id]))
        eq_(lastrowid, pk)


class InsertBehaviorTest(fixtures.TablesTest):
    run_deletes = "each"
    __backend__ = True

    @classmethod
    def define_tables(cls, metadata):
        Table(
            "autoinc_pk",
            metadata,
            Column(
                "id", Integer, primary_key=True, test_needs_autoincrement=True
            ),
            Column("data", String(50)),
        )
        Table(
            "manual_pk",
            metadata,
            Column("id", Integer, primary_key=True, autoincrement=False),
            Column("data", String(50)),
        )
        Table(
            "includes_defaults",
            metadata,
            Column(
                "id", Integer, primary_key=True, test_needs_autoincrement=True
            ),
            Column("data", String(50)),
            Column("x", Integer, default=5),
            Column(
                "y",
                Integer,
                default=literal_column("2", type_=Integer) + literal(2),
            ),
        )

    def test_autoclose_on_insert(self):
        if requirements.returning.enabled:
            engine = engines.testing_engine(
                options={"implicit_returning": False}
            )
        else:
            engine = config.db

        with engine.begin() as conn:
            r = conn.execute(self.tables.autoinc_pk.insert(), data="some data")
        assert r._soft_closed
        assert not r.closed
        assert r.is_insert
        assert not r.returns_rows

    @requirements.returning
    def test_autoclose_on_insert_implicit_returning(self):
        r = config.db.execute(
            self.tables.autoinc_pk.insert(), data="some data"
        )
        assert r._soft_closed
        assert not r.closed
        assert r.is_insert
        assert not r.returns_rows

    @requirements.empty_inserts
    def test_empty_insert(self):
        r = config.db.execute(self.tables.autoinc_pk.insert())
        assert r._soft_closed
        assert not r.closed

        r = config.db.execute(
            self.tables.autoinc_pk.select().where(
                self.tables.autoinc_pk.c.id != None
            )
        )

        assert len(r.fetchall())

    @requirements.insert_from_select
    def test_insert_from_select_autoinc(self):
        src_table = self.tables.manual_pk
        dest_table = self.tables.autoinc_pk
        config.db.execute(
            src_table.insert(),
            [
                dict(id=1, data="data1"),
                dict(id=2, data="data2"),
                dict(id=3, data="data3"),
            ],
        )

        result = config.db.execute(
            dest_table.insert().from_select(
                ("data",),
                select([src_table.c.data]).where(
                    src_table.c.data.in_(["data2", "data3"])
                ),
            )
        )

        eq_(result.inserted_primary_key, [None])

        result = config.db.execute(
            select([dest_table.c.data]).order_by(dest_table.c.data)
        )
        eq_(result.fetchall(), [("data2",), ("data3",)])

    @requirements.insert_from_select
    def test_insert_from_select_autoinc_no_rows(self):
        src_table = self.tables.manual_pk
        dest_table = self.tables.autoinc_pk

        result = config.db.execute(
            dest_table.insert().from_select(
                ("data",),
                select([src_table.c.data]).where(
                    src_table.c.data.in_(["data2", "data3"])
                ),
            )
        )
        eq_(result.inserted_primary_key, [None])

        result = config.db.execute(
            select([dest_table.c.data]).order_by(dest_table.c.data)
        )

        eq_(result.fetchall(), [])

    @requirements.insert_from_select
    def test_insert_from_select(self):
        table = self.tables.manual_pk
        config.db.execute(
            table.insert(),
            [
                dict(id=1, data="data1"),
                dict(id=2, data="data2"),
                dict(id=3, data="data3"),
            ],
        )

        config.db.execute(
            table.insert(inline=True).from_select(
                ("id", "data"),
                select([table.c.id + 5, table.c.data]).where(
                    table.c.data.in_(["data2", "data3"])
                ),
            )
        )

        eq_(
            config.db.execute(
                select([table.c.data]).order_by(table.c.data)
            ).fetchall(),
            [("data1",), ("data2",), ("data2",), ("data3",), ("data3",)],
        )

    @requirements.insert_from_select
    def test_insert_from_select_with_defaults(self):
        table = self.tables.includes_defaults
        config.db.execute(
            table.insert(),
            [
                dict(id=1, data="data1"),
                dict(id=2, data="data2"),
                dict(id=3, data="data3"),
            ],
        )

        config.db.execute(
            table.insert(inline=True).from_select(
                ("id", "data"),
                select([table.c.id + 5, table.c.data]).where(
                    table.c.data.in_(["data2", "data3"])
                ),
            )
        )

        eq_(
            config.db.execute(
                select([table]).order_by(table.c.data, table.c.id)
            ).fetchall(),
            [
                (1, "data1", 5, 4),
                (2, "data2", 5, 4),
                (7, "data2", 5, 4),
                (3, "data3", 5, 4),
                (8, "data3", 5, 4),
            ],
        )


class ReturningTest(fixtures.TablesTest):
    run_create_tables = "each"
    __requires__ = "returning", "autoincrement_insert"
    __backend__ = True

    __engine_options__ = {"implicit_returning": True}

    def _assert_round_trip(self, table, conn):
        row = conn.execute(table.select()).first()
        eq_(row, (config.db.dialect.default_sequence_base, "some data"))

    @classmethod
    def define_tables(cls, metadata):
        Table(
            "autoinc_pk",
            metadata,
            Column(
                "id", Integer, primary_key=True, test_needs_autoincrement=True
            ),
            Column("data", String(50)),
        )

    @requirements.fetch_rows_post_commit
    def test_explicit_returning_pk_autocommit(self):
        engine = config.db
        table = self.tables.autoinc_pk
        with engine.begin() as conn:
            r = conn.execute(
                table.insert().returning(table.c.id), data="some data"
            )
        pk = r.first()[0]
        fetched_pk = config.db.scalar(select([table.c.id]))
        eq_(fetched_pk, pk)

    def test_explicit_returning_pk_no_autocommit(self):
        engine = config.db
        table = self.tables.autoinc_pk
        with engine.begin() as conn:
            r = conn.execute(
                table.insert().returning(table.c.id), data="some data"
            )
            pk = r.first()[0]
        fetched_pk = config.db.scalar(select([table.c.id]))
        eq_(fetched_pk, pk)

    def test_autoincrement_on_insert_implicit_returning(self):

        config.db.execute(self.tables.autoinc_pk.insert(), data="some data")
        self._assert_round_trip(self.tables.autoinc_pk, config.db)

    def test_last_inserted_id_implicit_returning(self):

        r = config.db.execute(
            self.tables.autoinc_pk.insert(), data="some data"
        )
        pk = config.db.scalar(select([self.tables.autoinc_pk.c.id]))
        eq_(r.inserted_primary_key, [pk])


__all__ = ("LastrowidTest", "InsertBehaviorTest", "ReturningTest")