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

# Copyright 2016-2017 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
#
# 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/>.

"""Tests for the global page history."""

import logging

import pytest
from PyQt5.QtCore import QUrl

from qutebrowser.browser import history
from qutebrowser.utils import objreg, urlutils, usertypes
from qutebrowser.commands import cmdexc


@pytest.fixture(autouse=True)
def prerequisites(config_stub, fake_save_manager, init_sql):
    """Make sure everything is ready to initialize a WebHistory."""
    config_stub.data = {'general': {'private-browsing': False}}


@pytest.fixture()
def hist(tmpdir):
    return history.WebHistory()


@pytest.fixture()
def mock_time(mocker):
    m = mocker.patch('qutebrowser.browser.history.time')
    m.time.return_value = 12345
    return 12345


def test_iter(hist):
    urlstr = 'http://www.example.com/'
    url = QUrl(urlstr)
    hist.add_url(url, atime=12345)

    assert list(hist) == [(urlstr, '', 12345, False)]


def test_len(hist):
    assert len(hist) == 0

    url = QUrl('http://www.example.com/')
    hist.add_url(url)

    assert len(hist) == 1


def test_contains(hist):
    hist.add_url(QUrl('http://www.example.com/'), title='Title', atime=12345)
    assert 'http://www.example.com/' in hist
    assert 'www.example.com' not in hist
    assert 'Title' not in hist
    assert 12345 not in hist


def test_get_recent(hist):
    hist.add_url(QUrl('http://www.qutebrowser.org/'), atime=67890)
    hist.add_url(QUrl('http://example.com/'), atime=12345)
    assert list(hist.get_recent()) == [
        ('http://www.qutebrowser.org/', '', 67890, False),
        ('http://example.com/', '', 12345, False),
    ]


def test_entries_between(hist):
    hist.add_url(QUrl('http://www.example.com/1'), atime=12345)
    hist.add_url(QUrl('http://www.example.com/2'), atime=12346)
    hist.add_url(QUrl('http://www.example.com/3'), atime=12347)
    hist.add_url(QUrl('http://www.example.com/4'), atime=12348)
    hist.add_url(QUrl('http://www.example.com/5'), atime=12348)
    hist.add_url(QUrl('http://www.example.com/6'), atime=12349)
    hist.add_url(QUrl('http://www.example.com/7'), atime=12350)

    times = [x.atime for x in hist.entries_between(12346, 12349)]
    assert times == [12349, 12348, 12348, 12347]


def test_entries_before(hist):
    hist.add_url(QUrl('http://www.example.com/1'), atime=12346)
    hist.add_url(QUrl('http://www.example.com/2'), atime=12346)
    hist.add_url(QUrl('http://www.example.com/3'), atime=12347)
    hist.add_url(QUrl('http://www.example.com/4'), atime=12348)
    hist.add_url(QUrl('http://www.example.com/5'), atime=12348)
    hist.add_url(QUrl('http://www.example.com/6'), atime=12348)
    hist.add_url(QUrl('http://www.example.com/7'), atime=12349)
    hist.add_url(QUrl('http://www.example.com/8'), atime=12349)

    times = [x.atime for x in hist.entries_before(12348, limit=3, offset=2)]
    assert times == [12348, 12347, 12346]


def test_clear(qtbot, tmpdir, hist, mocker):
    hist.add_url(QUrl('http://example.com/'))
    hist.add_url(QUrl('http://www.qutebrowser.org/'))

    m = mocker.patch('qutebrowser.browser.history.message.confirm_async',
                     new=mocker.Mock, spec=[])
    hist.clear()
    assert m.called


def test_clear_force(qtbot, tmpdir, hist):
    hist.add_url(QUrl('http://example.com/'))
    hist.add_url(QUrl('http://www.qutebrowser.org/'))
    hist.clear(force=True)
    assert not len(hist)
    assert not len(hist.completion)


def test_delete_url(hist):
    hist.add_url(QUrl('http://example.com/'), atime=0)
    hist.add_url(QUrl('http://example.com/1'), atime=0)
    hist.add_url(QUrl('http://example.com/2'), atime=0)

    before = set(hist)
    completion_before = set(hist.completion)

    hist.delete_url(QUrl('http://example.com/1'))

    diff = before.difference(set(hist))
    assert diff == {('http://example.com/1', '', 0, False)}

    completion_diff = completion_before.difference(set(hist.completion))
    assert completion_diff == {('http://example.com/1', '', 0)}


@pytest.mark.parametrize(
    'url, atime, title, redirect, history_url, completion_url', [

        ('http://www.example.com', 12346, 'the title', False,
            'http://www.example.com', 'http://www.example.com'),
        ('http://www.example.com', 12346, 'the title', True,
            'http://www.example.com', None),
        ('http://www.example.com/sp ce', 12346, 'the title', False,
            'http://www.example.com/sp%20ce', 'http://www.example.com/sp ce'),
        ('https://user:pass@example.com', 12346, 'the title', False,
            'https://user@example.com', 'https://user@example.com'),
    ]
)
def test_add_url(qtbot, hist, url, atime, title, redirect, history_url,
                 completion_url):
    hist.add_url(QUrl(url), atime=atime, title=title, redirect=redirect)
    assert list(hist) == [(history_url, title, atime, redirect)]
    if completion_url is None:
        assert not len(hist.completion)
    else:
        assert list(hist.completion) == [(completion_url, title, atime)]


def test_add_url_invalid(qtbot, hist, caplog):
    with caplog.at_level(logging.WARNING):
        hist.add_url(QUrl())
    assert not list(hist)
    assert not list(hist.completion)


@pytest.mark.parametrize('level, url, req_url, expected', [
    (logging.DEBUG, 'a.com', 'a.com', [('a.com', 'title', 12345, False)]),
    (logging.DEBUG, 'a.com', 'b.com', [('a.com', 'title', 12345, False),
                                       ('b.com', 'title', 12345, True)]),
    (logging.WARNING, 'a.com', '', [('a.com', 'title', 12345, False)]),
    (logging.WARNING, '', '', []),
    (logging.WARNING, 'data:foo', '', []),
    (logging.WARNING, 'a.com', 'data:foo', []),
])
def test_add_from_tab(hist, level, url, req_url, expected, mock_time, caplog):
    with caplog.at_level(level):
        hist.add_from_tab(QUrl(url), QUrl(req_url), 'title')
    assert set(hist) == set(expected)


@pytest.fixture
def hist_interface(hist):
    # pylint: disable=invalid-name
    QtWebKit = pytest.importorskip('PyQt5.QtWebKit')
    from qutebrowser.browser.webkit import webkithistory
    QWebHistoryInterface = QtWebKit.QWebHistoryInterface
    # pylint: enable=invalid-name
    hist.add_url(url=QUrl('http://www.example.com/'), title='example')
    interface = webkithistory.WebHistoryInterface(hist)
    QWebHistoryInterface.setDefaultInterface(interface)
    yield
    QWebHistoryInterface.setDefaultInterface(None)


def test_history_interface(qtbot, webview, hist_interface):
    html = b"<a href='about:blank'>foo</a>"
    url = urlutils.data_url('text/html', html)
    with qtbot.waitSignal(webview.loadFinished):
        webview.load(url)


@pytest.fixture
def cleanup_init():
    # prevent test_init from leaking state
    yield
    hist = objreg.get('web-history', None)
    if hist is not None:
        hist.setParent(None)
        objreg.delete('web-history')
    try:
        from PyQt5.QtWebKit import QWebHistoryInterface
        QWebHistoryInterface.setDefaultInterface(None)
    except ImportError:
        pass


@pytest.mark.parametrize('backend', [usertypes.Backend.QtWebEngine,
                                     usertypes.Backend.QtWebKit])
def test_init(backend, qapp, tmpdir, monkeypatch, cleanup_init):
    if backend == usertypes.Backend.QtWebKit:
        pytest.importorskip('PyQt5.QtWebKitWidgets')
    else:
        assert backend == usertypes.Backend.QtWebEngine

    monkeypatch.setattr(history.objects, 'backend', backend)
    history.init(qapp)
    hist = objreg.get('web-history')
    assert hist.parent() is qapp

    try:
        from PyQt5.QtWebKit import QWebHistoryInterface
    except ImportError:
        QWebHistoryInterface = None

    if backend == usertypes.Backend.QtWebKit:
        default_interface = QWebHistoryInterface.defaultInterface()
        assert default_interface._history is hist
    else:
        assert backend == usertypes.Backend.QtWebEngine
        if QWebHistoryInterface is None:
            default_interface = None
        else:
            default_interface = QWebHistoryInterface.defaultInterface()
        # For this to work, nothing can ever have called setDefaultInterface
        # before (so we need to test webengine before webkit)
        assert default_interface is None


def test_import_txt(hist, data_tmpdir, monkeypatch, stubs):
    monkeypatch.setattr(history, 'QTimer', stubs.InstaTimer)
    histfile = data_tmpdir / 'history'
    # empty line is deliberate, to test skipping empty lines
    histfile.write('''12345 http://example.com/ title
                      12346 http://qutebrowser.org/
                      67890 http://example.com/path

                      68891-r http://example.com/path/other ''')

    hist.import_txt()

    assert list(hist) == [
        ('http://example.com/', 'title', 12345, False),
        ('http://qutebrowser.org/', '', 12346, False),
        ('http://example.com/path', '', 67890, False),
        ('http://example.com/path/other', '', 68891, True)
    ]

    assert not histfile.exists()
    assert (data_tmpdir / 'history.bak').exists()


@pytest.mark.parametrize('line', [
    '',
    '#12345 http://example.com/commented',

    # https://bugreports.qt.io/browse/QTBUG-60364
    '12345 http://.com/',
    '12345 https://.com/',
    '12345 http://www..com/',
    '12345 https://www..com/',

    # issue #2646
    '12345 data:text/html;charset=UTF-8,%3C%21DOCTYPE%20html%20PUBLIC%20%22-',
])
def test_import_txt_skip(hist, data_tmpdir, line, monkeypatch, stubs):
    """import_txt should skip certain lines silently."""
    monkeypatch.setattr(history, 'QTimer', stubs.InstaTimer)
    histfile = data_tmpdir / 'history'
    histfile.write(line)

    hist.import_txt()

    assert not histfile.exists()
    assert not len(hist)


@pytest.mark.parametrize('line', [
    'xyz http://example.com/bad-timestamp',
    '12345',
    'http://example.com/no-timestamp',
    '68891-r-r http://example.com/double-flag',
    '68891-x http://example.com/bad-flag',
    '68891 http://.com',
])
def test_import_txt_invalid(hist, data_tmpdir, line, monkeypatch, stubs,
                            caplog):
    """import_txt should fail on certain lines."""
    monkeypatch.setattr(history, 'QTimer', stubs.InstaTimer)
    histfile = data_tmpdir / 'history'
    histfile.write(line)

    with caplog.at_level(logging.ERROR):
        hist.import_txt()

    assert any(rec.msg.startswith("Failed to import history:")
               for rec in caplog.records)

    assert histfile.exists()


def test_import_txt_nonexistent(hist, data_tmpdir, monkeypatch, stubs):
    """import_txt should do nothing if the history file doesn't exist."""
    monkeypatch.setattr(history, 'QTimer', stubs.InstaTimer)
    hist.import_txt()


def test_debug_dump_history(hist, tmpdir):
    hist.add_url(QUrl('http://example.com/1'), title="Title1", atime=12345)
    hist.add_url(QUrl('http://example.com/2'), title="Title2", atime=12346)
    hist.add_url(QUrl('http://example.com/3'), title="Title3", atime=12347)
    hist.add_url(QUrl('http://example.com/4'), title="Title4", atime=12348,
                 redirect=True)
    histfile = tmpdir / 'history'
    hist.debug_dump_history(str(histfile))
    expected = ['12345 http://example.com/1 Title1',
                '12346 http://example.com/2 Title2',
                '12347 http://example.com/3 Title3',
                '12348-r http://example.com/4 Title4']
    assert histfile.read() == '\n'.join(expected)


def test_debug_dump_history_nonexistent(hist, tmpdir):
    histfile = tmpdir / 'nonexistent' / 'history'
    with pytest.raises(cmdexc.CommandError):
        hist.debug_dump_history(str(histfile))


def test_rebuild_completion(hist):
    hist.insert({'url': 'example.com/1', 'title': 'example1',
                 'redirect': False, 'atime': 1})
    hist.insert({'url': 'example.com/1', 'title': 'example1',
                 'redirect': False, 'atime': 2})
    hist.insert({'url': 'example.com/2%203', 'title': 'example2',
                 'redirect': False, 'atime': 3})
    hist.insert({'url': 'example.com/3', 'title': 'example3',
                 'redirect': True, 'atime': 4})
    hist.insert({'url': 'example.com/2 3', 'title': 'example2',
                 'redirect': False, 'atime': 5})
    hist.completion.delete_all()

    hist2 = history.WebHistory()
    assert list(hist2.completion) == [
        ('example.com/1', 'example1', 2),
        ('example.com/2 3', 'example2', 5),
    ]


def test_no_rebuild_completion(hist):
    """Ensure that completion is not regenerated unless completely empty."""
    hist.add_url(QUrl('example.com/1'), redirect=False, atime=1)
    hist.add_url(QUrl('example.com/2'), redirect=False, atime=2)
    hist.completion.delete('url', 'example.com/2')

    hist2 = history.WebHistory()
    assert list(hist2.completion) == [('example.com/1', '', 1)]


def test_user_version(hist, monkeypatch):
    """Ensure that completion is regenerated if user_version is incremented."""
    hist.add_url(QUrl('example.com/1'), redirect=False, atime=1)
    hist.add_url(QUrl('example.com/2'), redirect=False, atime=2)
    hist.completion.delete('url', 'example.com/2')

    hist2 = history.WebHistory()
    assert list(hist2.completion) == [('example.com/1', '', 1)]

    monkeypatch.setattr(history, '_USER_VERSION', history._USER_VERSION + 1)
    hist3 = history.WebHistory()
    assert list(hist3.completion) == [
        ('example.com/1', '', 1),
        ('example.com/2', '', 2),
    ]