# pylint: disable=redefined-outer-name,missing-function-docstring,protected-access
""" Tests on opening hours helpers """

import pytest

from mylib.oracle import OracleDB


class FakeCXOracleCursor:
    """ Fake cx_Oracle cursor """

    def __init__(self, expected_sql, expected_params, expected_return, expected_just_try, expected_exception):
        self.expected_sql = expected_sql
        self.expected_params = expected_params
        self.expected_return = expected_return
        self.expected_just_try = expected_just_try
        self.expected_exception = expected_exception

    def execute(self, sql, **params):
        if self.expected_exception:
            raise Exception("%s.execute(%s, %s): expected exception" % (self, sql, params))
        if self.expected_just_try and not sql.lower().startswith('select '):
            assert False, "%s.execute(%s, %s) may not be executed in just try mode" % (self, sql, params)
        assert sql == self.expected_sql, "%s.execute(): Invalid SQL query:\n  '%s'\nMay be:\n  '%s'" % (self, sql, self.expected_sql)
        assert params == self.expected_params, "%s.execute(): Invalid params:\n  %s\nMay be:\n  %s" % (self, params, self.expected_params)
        return self.expected_return

    def fetchall(self):
        return self.expected_return

    def __repr__(self):
        return "FakeCXOracleCursor(%s, %s, %s, %s)" % (
            self.expected_sql, self.expected_params,
            self.expected_return, self.expected_just_try
        )


class FakeCXOracle:
    """ Fake cx_Oracle connection """

    expected_sql = None
    expected_params = dict()
    expected_return = True
    expected_just_try = False
    expected_exception = False
    just_try = False

    def __init__(self, **kwargs):
        allowed_kwargs = dict(dsn=str, user=str, password=(str, None))
        for arg, value in kwargs.items():
            assert arg in allowed_kwargs, "Invalid arg %s='%s'" % (arg, value)
            assert isinstance(value, allowed_kwargs[arg]), "Arg %s not a %s (%s)" % (arg, allowed_kwargs[arg], type(value))
            setattr(self, arg, value)

    def close(self):
        return self.expected_return

    def cursor(self):
        return FakeCXOracleCursor(
            self.expected_sql, self.expected_params,
            self.expected_return, self.expected_just_try or self.just_try,
            self.expected_exception
        )

    def commit(self):
        self._check_just_try()
        return self.expected_return

    def rollback(self):
        self._check_just_try()
        return self.expected_return

    def _check_just_try(self):
        if self.just_try:
            assert False, "May not be executed in just try mode"


def fake_cxoracle_connect(**kwargs):
    return FakeCXOracle(**kwargs)


def fake_cxoracle_connect_just_try(**kwargs):
    con = FakeCXOracle(**kwargs)
    con.just_try = True
    return con


@pytest.fixture
def test_oracledb():
    return OracleDB('127.0.0.1/dbname', 'user', 'password')


@pytest.fixture
def fake_oracledb(mocker):
    mocker.patch('cx_Oracle.connect', fake_cxoracle_connect)
    return OracleDB('127.0.0.1/dbname', 'user', 'password')


@pytest.fixture
def fake_just_try_oracledb(mocker):
    mocker.patch('cx_Oracle.connect', fake_cxoracle_connect_just_try)
    return OracleDB('127.0.0.1/dbname', 'user', 'password', just_try=True)


@pytest.fixture
def fake_connected_oracledb(fake_oracledb):
    fake_oracledb.connect()
    return fake_oracledb


@pytest.fixture
def fake_connected_just_try_oracledb(fake_just_try_oracledb):
    fake_just_try_oracledb.connect()
    return fake_just_try_oracledb


def generate_mock_args(expected_args=(), expected_kwargs=dict(), expected_return=True):  # pylint: disable=dangerous-default-value
    def mock_args(*args, **kwargs):
        assert args == expected_args, "Invalid call args:\n  %s\nMay be:\n  %s" % (args, expected_args)
        assert kwargs == expected_kwargs, "Invalid call kwargs:\n  %s\nMay be:\n  %s" % (kwargs, expected_kwargs)
        return expected_return
    return mock_args


def mock_doSQL_just_try(self, sql, params=None):  # pylint: disable=unused-argument
    assert False, "doSQL() may not be executed in just try mode"


def generate_mock_doSQL(expected_sql, expected_params=dict(), expected_return=True):  # pylint: disable=dangerous-default-value
    def mock_doSQL(self, sql, params=None):  # pylint: disable=unused-argument
        assert sql == expected_sql, "Invalid generated SQL query:\n  '%s'\nMay be:\n  '%s'" % (sql, expected_sql)
        assert params == expected_params, "Invalid generated params:\n  %s\nMay be:\n  %s" % (params, expected_params)
        return expected_return
    return mock_doSQL


# OracleDB.doSelect() have same expected parameters as OracleDB.doSQL()
generate_mock_doSelect = generate_mock_doSQL
mock_doSelect_just_try = mock_doSQL_just_try

#
# Test on OracleDB helper methods
#


def test_combine_params_with_to_add_parameter():
    assert OracleDB._combine_params(dict(test1=1), dict(test2=2)) == dict(
        test1=1, test2=2
    )


def test_combine_params_with_kargs():
    assert OracleDB._combine_params(dict(test1=1), test2=2) == dict(
        test1=1, test2=2
    )


def test_combine_params_with_kargs_and_to_add_parameter():
    assert OracleDB._combine_params(dict(test1=1), dict(test2=2), test3=3) == dict(
        test1=1, test2=2, test3=3
    )


def test_format_where_clauses_params_are_preserved():
    args = ('test = test', dict(test1=1))
    assert OracleDB._format_where_clauses(*args) == args


def test_format_where_clauses_raw():
    assert OracleDB._format_where_clauses('test = test') == (('test = test'), dict())


def test_format_where_clauses_tuple_clause_with_params():
    where_clauses = (
        'test1 = :test1 AND test2 = :test2',
        dict(test1=1, test2=2)
    )
    assert OracleDB._format_where_clauses(where_clauses) == where_clauses


def test_format_where_clauses_dict():
    where_clauses = dict(test1=1, test2=2)
    assert OracleDB._format_where_clauses(where_clauses) == (
        '"test1" = :test1 AND "test2" = :test2',
        where_clauses
    )


def test_format_where_clauses_combined_types():
    where_clauses = (
        'test1 = 1',
        ('test2 LIKE :test2', dict(test2=2)),
        dict(test3=3, test4=4)
    )
    assert OracleDB._format_where_clauses(where_clauses) == (
        'test1 = 1 AND test2 LIKE :test2 AND "test3" = :test3 AND "test4" = :test4',
        dict(test2=2, test3=3, test4=4)
    )


def test_format_where_clauses_with_where_op():
    where_clauses = dict(test1=1, test2=2)
    assert OracleDB._format_where_clauses(where_clauses, where_op='OR') == (
        '"test1" = :test1 OR "test2" = :test2',
        where_clauses
    )


def test_add_where_clauses():
    sql = "SELECT * FROM table"
    where_clauses = dict(test1=1, test2=2)
    assert OracleDB._add_where_clauses(sql, None, where_clauses) == (
        sql + ' WHERE "test1" = :test1 AND "test2" = :test2',
        where_clauses
    )


def test_add_where_clauses_preserved_params():
    sql = "SELECT * FROM table"
    where_clauses = dict(test1=1, test2=2)
    params = dict(fake1=1)
    assert OracleDB._add_where_clauses(sql, params.copy(), where_clauses) == (
        sql + ' WHERE "test1" = :test1 AND "test2" = :test2',
        dict(**where_clauses, **params)
    )


def test_add_where_clauses_with_op():
    sql = "SELECT * FROM table"
    where_clauses = ('test1=1', 'test2=2')
    assert OracleDB._add_where_clauses(sql, None, where_clauses, where_op='OR') == (
        sql + ' WHERE test1=1 OR test2=2',
        dict()
    )


def test_add_where_clauses_with_duplicated_field():
    sql = "UPDATE table SET test1=:test1"
    params = dict(test1='new_value')
    where_clauses = dict(test1='where_value')
    assert OracleDB._add_where_clauses(sql, params, where_clauses) == (
        sql + ' WHERE "test1" = :test1_1',
        dict(test1='new_value', test1_1='where_value')
    )


def test_quote_table_name():
    assert OracleDB._quote_table_name("mytable") == '"mytable"'
    assert OracleDB._quote_table_name("myschema.mytable") == '"myschema"."mytable"'


def test_insert(mocker, test_oracledb):
    values = dict(test1=1, test2=2)
    mocker.patch(
        'mylib.oracle.OracleDB.doSQL',
        generate_mock_doSQL(
            'INSERT INTO "mytable" ("test1", "test2") VALUES (:test1, :test2)',
            values
        )
    )

    assert test_oracledb.insert('mytable', values)


def test_insert_just_try(mocker, test_oracledb):
    mocker.patch('mylib.oracle.OracleDB.doSQL', mock_doSQL_just_try)
    assert test_oracledb.insert('mytable', dict(test1=1, test2=2), just_try=True)


def test_update(mocker, test_oracledb):
    values = dict(test1=1, test2=2)
    where_clauses = dict(test3=3, test4=4)
    mocker.patch(
        'mylib.oracle.OracleDB.doSQL',
        generate_mock_doSQL(
            'UPDATE "mytable" SET "test1" = :test1, "test2" = :test2 WHERE "test3" = :test3 AND "test4" = :test4',
            dict(**values, **where_clauses)
        )
    )

    assert test_oracledb.update('mytable', values, where_clauses)


def test_update_just_try(mocker, test_oracledb):
    mocker.patch('mylib.oracle.OracleDB.doSQL', mock_doSQL_just_try)
    assert test_oracledb.update('mytable', dict(test1=1, test2=2), None, just_try=True)


def test_delete(mocker, test_oracledb):
    where_clauses = dict(test1=1, test2=2)
    mocker.patch(
        'mylib.oracle.OracleDB.doSQL',
        generate_mock_doSQL(
            'DELETE FROM "mytable" WHERE "test1" = :test1 AND "test2" = :test2',
            where_clauses
        )
    )

    assert test_oracledb.delete('mytable', where_clauses)


def test_delete_just_try(mocker, test_oracledb):
    mocker.patch('mylib.oracle.OracleDB.doSQL', mock_doSQL_just_try)
    assert test_oracledb.delete('mytable', None, just_try=True)


def test_truncate(mocker, test_oracledb):
    mocker.patch(
        'mylib.oracle.OracleDB.doSQL',
        generate_mock_doSQL('TRUNCATE "mytable"', None)
    )

    assert test_oracledb.truncate('mytable')


def test_truncate_just_try(mocker, test_oracledb):
    mocker.patch('mylib.oracle.OracleDB.doSQL', mock_doSelect_just_try)
    assert test_oracledb.truncate('mytable', just_try=True)


def test_select(mocker, test_oracledb):
    fields = ('field1', 'field2')
    where_clauses = dict(test3=3, test4=4)
    expected_return = [
        dict(field1=1, field2=2),
        dict(field1=2, field2=3),
    ]
    order_by = "field1, DESC"
    mocker.patch(
        'mylib.oracle.OracleDB.doSelect',
        generate_mock_doSQL(
            'SELECT "field1", "field2" FROM "mytable" WHERE "test3" = :test3 AND "test4" = :test4 ORDER BY ' + order_by,
            where_clauses, expected_return
        )
    )

    assert test_oracledb.select('mytable', where_clauses, fields, order_by=order_by) == expected_return


def test_select_without_field_and_order_by(mocker, test_oracledb):
    mocker.patch(
        'mylib.oracle.OracleDB.doSelect',
        generate_mock_doSQL(
            'SELECT * FROM "mytable"'
        )
    )

    assert test_oracledb.select('mytable')


def test_select_just_try(mocker, test_oracledb):
    mocker.patch('mylib.oracle.OracleDB.doSQL', mock_doSelect_just_try)
    assert test_oracledb.select('mytable', None, None, just_try=True)

#
# Tests on main methods
#


def test_connect(mocker, test_oracledb):
    expected_kwargs = dict(
        dsn=test_oracledb._dsn,
        user=test_oracledb._user,
        password=test_oracledb._pwd
    )

    mocker.patch(
        'cx_Oracle.connect',
        generate_mock_args(
            expected_kwargs=expected_kwargs
        )
    )

    assert test_oracledb.connect()


def test_close(fake_oracledb):
    assert fake_oracledb.close() is None


def test_close_connected(fake_connected_oracledb):
    assert fake_connected_oracledb.close() is None


def test_doSQL(fake_connected_oracledb):
    fake_connected_oracledb._conn.expected_sql = 'DELETE FROM table WHERE test1 = :test1'
    fake_connected_oracledb._conn.expected_params = dict(test1=1)
    fake_connected_oracledb.doSQL(fake_connected_oracledb._conn.expected_sql, fake_connected_oracledb._conn.expected_params)


def test_doSQL_without_params(fake_connected_oracledb):
    fake_connected_oracledb._conn.expected_sql = 'DELETE FROM table'
    fake_connected_oracledb.doSQL(fake_connected_oracledb._conn.expected_sql)


def test_doSQL_just_try(fake_connected_just_try_oracledb):
    assert fake_connected_just_try_oracledb.doSQL('DELETE FROM table')


def test_doSQL_on_exception(fake_connected_oracledb):
    fake_connected_oracledb._conn.expected_exception = True
    assert fake_connected_oracledb.doSQL('DELETE FROM table') is False


def test_doSelect(fake_connected_oracledb):
    fake_connected_oracledb._conn.expected_sql = 'SELECT * FROM table WHERE test1 = :test1'
    fake_connected_oracledb._conn.expected_params = dict(test1=1)
    fake_connected_oracledb._conn.expected_return = [dict(test1=1)]
    assert fake_connected_oracledb.doSelect(
        fake_connected_oracledb._conn.expected_sql,
        fake_connected_oracledb._conn.expected_params) == fake_connected_oracledb._conn.expected_return


def test_doSelect_without_params(fake_connected_oracledb):
    fake_connected_oracledb._conn.expected_sql = 'SELECT * FROM table'
    fake_connected_oracledb._conn.expected_return = [dict(test1=1)]
    assert fake_connected_oracledb.doSelect(fake_connected_oracledb._conn.expected_sql) == fake_connected_oracledb._conn.expected_return


def test_doSelect_on_exception(fake_connected_oracledb):
    fake_connected_oracledb._conn.expected_exception = True
    assert fake_connected_oracledb.doSelect('SELECT * FROM table') is False


def test_doSelect_just_try(fake_connected_just_try_oracledb):
    fake_connected_just_try_oracledb._conn.expected_sql = 'SELECT * FROM table WHERE test1 = :test1'
    fake_connected_just_try_oracledb._conn.expected_params = dict(test1=1)
    fake_connected_just_try_oracledb._conn.expected_return = [dict(test1=1)]
    assert fake_connected_just_try_oracledb.doSelect(
        fake_connected_just_try_oracledb._conn.expected_sql,
        fake_connected_just_try_oracledb._conn.expected_params
    ) == fake_connected_just_try_oracledb._conn.expected_return