# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:

# Copyright 2016-2018 Ryan Roden-Corrent (rcorre) <ryan@rcorre.net>
#
# This file is part of qutebrowser.
#
# qutebrowser is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# qutebrowser is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with qutebrowser.  If not, see <http://www.gnu.org/licenses/>.

"""Test the SQL API."""

import pytest

from PyQt5.QtSql import QSqlError

from qutebrowser.misc import sql


pytestmark = pytest.mark.usefixtures('init_sql')


@pytest.mark.parametrize('klass', [sql.SqlEnvironmentError, sql.SqlBugError])
def test_sqlerror(klass):
    text = "Hello World"
    err = klass(text)
    assert str(err) == text
    assert err.text() == text


class TestSqlError:

    @pytest.mark.parametrize('error_code, exception', [
        (sql.SqliteErrorCode.BUSY, sql.SqlEnvironmentError),
        (sql.SqliteErrorCode.CONSTRAINT, sql.SqlBugError),
    ])
    def test_environmental(self, error_code, exception):
        sql_err = QSqlError("driver text", "db text", QSqlError.UnknownError,
                            error_code)
        with pytest.raises(exception):
            sql.raise_sqlite_error("Message", sql_err)

    def test_qtbug_70506(self):
        """Test Qt's wrong handling of errors while opening the database.

        Due to https://bugreports.qt.io/browse/QTBUG-70506 we get an error with
        "out of memory" as string and -1 as error code.
        """
        sql_err = QSqlError("Error opening database",
                            "out of memory",
                            QSqlError.UnknownError,
                            sql.SqliteErrorCode.UNKNOWN)
        with pytest.raises(sql.SqlEnvironmentError):
            sql.raise_sqlite_error("Message", sql_err)

    def test_logging(self, caplog):
        sql_err = QSqlError("driver text", "db text", QSqlError.UnknownError,
                            '23')
        with pytest.raises(sql.SqlBugError):
            sql.raise_sqlite_error("Message", sql_err)

        lines = [r.message for r in caplog.records]
        expected = ['SQL error:',
                    'type: UnknownError',
                    'database text: db text',
                    'driver text: driver text',
                    'error code: 23']

        assert lines == expected

    @pytest.mark.parametrize('klass',
                             [sql.SqlEnvironmentError, sql.SqlBugError])
    def test_text(self, klass):
        sql_err = QSqlError("driver text", "db text")
        err = klass("Message", sql_err)
        assert err.text() == "db text"


def test_init():
    sql.SqlTable('Foo', ['name', 'val', 'lucky'])
    # should not error if table already exists
    sql.SqlTable('Foo', ['name', 'val', 'lucky'])


def test_insert(qtbot):
    table = sql.SqlTable('Foo', ['name', 'val', 'lucky'])
    with qtbot.waitSignal(table.changed):
        table.insert({'name': 'one', 'val': 1, 'lucky': False})
    with qtbot.waitSignal(table.changed):
        table.insert({'name': 'wan', 'val': 1, 'lucky': False})


def test_insert_replace(qtbot):
    table = sql.SqlTable('Foo', ['name', 'val', 'lucky'],
                         constraints={'name': 'PRIMARY KEY'})
    with qtbot.waitSignal(table.changed):
        table.insert({'name': 'one', 'val': 1, 'lucky': False}, replace=True)
    with qtbot.waitSignal(table.changed):
        table.insert({'name': 'one', 'val': 11, 'lucky': True}, replace=True)
    assert list(table) == [('one', 11, True)]

    with pytest.raises(sql.SqlBugError):
        table.insert({'name': 'one', 'val': 11, 'lucky': True}, replace=False)


def test_insert_batch(qtbot):
    table = sql.SqlTable('Foo', ['name', 'val', 'lucky'])

    with qtbot.waitSignal(table.changed):
        table.insert_batch({'name': ['one', 'nine', 'thirteen'],
                            'val': [1, 9, 13],
                            'lucky': [False, False, True]})

    assert list(table) == [('one', 1, False),
                           ('nine', 9, False),
                           ('thirteen', 13, True)]


def test_insert_batch_replace(qtbot):
    table = sql.SqlTable('Foo', ['name', 'val', 'lucky'],
                         constraints={'name': 'PRIMARY KEY'})

    with qtbot.waitSignal(table.changed):
        table.insert_batch({'name': ['one', 'nine', 'thirteen'],
                            'val': [1, 9, 13],
                            'lucky': [False, False, True]})

    with qtbot.waitSignal(table.changed):
        table.insert_batch({'name': ['one', 'nine'],
                            'val': [11, 19],
                            'lucky': [True, True]},
                           replace=True)

    assert list(table) == [('thirteen', 13, True),
                           ('one', 11, True),
                           ('nine', 19, True)]

    with pytest.raises(sql.SqlBugError):
        table.insert_batch({'name': ['one', 'nine'],
                            'val': [11, 19],
                            'lucky': [True, True]})


def test_iter():
    table = sql.SqlTable('Foo', ['name', 'val', 'lucky'])
    table.insert({'name': 'one', 'val': 1, 'lucky': False})
    table.insert({'name': 'nine', 'val': 9, 'lucky': False})
    table.insert({'name': 'thirteen', 'val': 13, 'lucky': True})
    assert list(table) == [('one', 1, False),
                           ('nine', 9, False),
                           ('thirteen', 13, True)]


@pytest.mark.parametrize('rows, sort_by, sort_order, limit, result', [
    ([{"a": 2, "b": 5}, {"a": 1, "b": 6}, {"a": 3, "b": 4}], 'a', 'asc', 5,
     [(1, 6), (2, 5), (3, 4)]),
    ([{"a": 2, "b": 5}, {"a": 1, "b": 6}, {"a": 3, "b": 4}], 'a', 'desc', 3,
     [(3, 4), (2, 5), (1, 6)]),
    ([{"a": 2, "b": 5}, {"a": 1, "b": 6}, {"a": 3, "b": 4}], 'b', 'desc', 2,
     [(1, 6), (2, 5)]),
    ([{"a": 2, "b": 5}, {"a": 1, "b": 6}, {"a": 3, "b": 4}], 'a', 'asc', -1,
     [(1, 6), (2, 5), (3, 4)]),
])
def test_select(rows, sort_by, sort_order, limit, result):
    table = sql.SqlTable('Foo', ['a', 'b'])
    for row in rows:
        table.insert(row)
    assert list(table.select(sort_by, sort_order, limit)) == result


def test_delete(qtbot):
    table = sql.SqlTable('Foo', ['name', 'val', 'lucky'])
    table.insert({'name': 'one', 'val': 1, 'lucky': False})
    table.insert({'name': 'nine', 'val': 9, 'lucky': False})
    table.insert({'name': 'thirteen', 'val': 13, 'lucky': True})
    with pytest.raises(KeyError):
        table.delete('name', 'nope')
    with qtbot.waitSignal(table.changed):
        table.delete('name', 'thirteen')
    assert list(table) == [('one', 1, False), ('nine', 9, False)]
    with qtbot.waitSignal(table.changed):
        table.delete('lucky', False)
    assert not list(table)


def test_len():
    table = sql.SqlTable('Foo', ['name', 'val', 'lucky'])
    assert len(table) == 0
    table.insert({'name': 'one', 'val': 1, 'lucky': False})
    assert len(table) == 1
    table.insert({'name': 'nine', 'val': 9, 'lucky': False})
    assert len(table) == 2
    table.insert({'name': 'thirteen', 'val': 13, 'lucky': True})
    assert len(table) == 3


def test_contains():
    table = sql.SqlTable('Foo', ['name', 'val', 'lucky'])
    table.insert({'name': 'one', 'val': 1, 'lucky': False})
    table.insert({'name': 'nine', 'val': 9, 'lucky': False})
    table.insert({'name': 'thirteen', 'val': 13, 'lucky': True})

    name_query = table.contains_query('name')
    val_query = table.contains_query('val')
    lucky_query = table.contains_query('lucky')

    assert name_query.run(val='one').value()
    assert name_query.run(val='thirteen').value()
    assert val_query.run(val=9).value()
    assert lucky_query.run(val=False).value()
    assert lucky_query.run(val=True).value()
    assert not name_query.run(val='oone').value()
    assert not name_query.run(val=1).value()
    assert not name_query.run(val='*').value()
    assert not val_query.run(val=10).value()


def test_delete_all(qtbot):
    table = sql.SqlTable('Foo', ['name', 'val', 'lucky'])
    table.insert({'name': 'one', 'val': 1, 'lucky': False})
    table.insert({'name': 'nine', 'val': 9, 'lucky': False})
    table.insert({'name': 'thirteen', 'val': 13, 'lucky': True})
    with qtbot.waitSignal(table.changed):
        table.delete_all()
    assert list(table) == []


def test_version():
    assert isinstance(sql.version(), str)


class TestSqlQuery:

    def test_prepare_error(self):
        with pytest.raises(sql.SqlBugError) as excinfo:
            sql.Query('invalid')

        expected = ('Failed to prepare query "invalid": "near "invalid": '
                    'syntax error Unable to execute statement"')
        assert str(excinfo.value) == expected

    @pytest.mark.parametrize('forward_only', [True, False])
    def test_forward_only(self, forward_only):
        q = sql.Query('SELECT 0 WHERE 0', forward_only=forward_only)
        assert q.query.isForwardOnly() == forward_only

    def test_iter_inactive(self):
        q = sql.Query('SELECT 0')
        with pytest.raises(sql.SqlBugError,
                           match='Cannot iterate inactive query'):
            next(iter(q))

    def test_iter_empty(self):
        q = sql.Query('SELECT 0 AS col WHERE 0')
        q.run()
        with pytest.raises(StopIteration):
            next(iter(q))

    def test_iter(self):
        q = sql.Query('SELECT 0 AS col')
        q.run()
        result = next(iter(q))
        assert result.col == 0

    def test_iter_multiple(self):
        q = sql.Query('VALUES (1), (2), (3);')
        res = list(q.run())
        assert len(res) == 3
        assert res[0].column1 == 1

    def test_run_binding(self):
        q = sql.Query('SELECT :answer')
        q.run(answer=42)
        assert q.value() == 42

    def test_run_missing_binding(self):
        q = sql.Query('SELECT :answer')
        with pytest.raises(sql.SqlBugError, match='Missing bound values!'):
            q.run()

    def test_run_batch(self):
        q = sql.Query('SELECT :answer')
        q.run_batch(values={'answer': [42]})
        assert q.value() == 42

    def test_run_batch_missing_binding(self):
        q = sql.Query('SELECT :answer')
        with pytest.raises(sql.SqlBugError, match='Missing bound values!'):
            q.run_batch(values={})

    def test_value_missing(self):
        q = sql.Query('SELECT 0 WHERE 0')
        q.run()
        with pytest.raises(sql.SqlBugError,
                           match='No result for single-result query'):
            q.value()

    def test_num_rows_affected(self):
        q = sql.Query('SELECT 0')
        q.run()
        assert q.rows_affected() == 0

    def test_bound_values(self):
        q = sql.Query('SELECT :answer')
        q.run(answer=42)
        assert q.bound_values() == {':answer': 42}