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

# Copyright 2015-2016 Alexander Cogneau (acogneau) <alexander.cogneau@gmail.com>:
#
# 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/>.

from PyQt5.QtNetwork import QNetworkCookie
from PyQt5.QtCore import QUrl
import pytest

from qutebrowser.browser.webkit import cookies
from qutebrowser.misc import lineparser

CONFIG_ALL_COOKIES = {'content': {'cookies-accept': 'all'}}
CONFIG_NEVER_COOKIES = {'content': {'cookies-accept': 'never'}}
CONFIG_COOKIES_ENABLED = {'content': {'cookies-store': True}}


COOKIE1 = b'foo1=bar; expires=Tue, 01-Jan-2036 08:00:01 GMT'
COOKIE2 = b'foo2=bar; expires=Tue, 01-Jan-2036 08:00:01 GMT'
SESSION_COOKIE = b'foo3=bar'
EXPIRED_COOKIE = b'foo4=bar; expires=Sat, 01-Jan-2000 08:00:01 GMT'


class LineparserSaveStub(lineparser.BaseLineParser):

    """A stub for LineParser's save().

    Attributes:
        data: The data before the write
        saved: The .data before save()
    """

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.saved = []
        self.data = []

    def save(self):
        self.saved = self.data

    def clear(self):
        pass

    def __iter__(self):
        return iter(self.data)

    def __getitem__(self, key):
        return self.data[key]


def test_set_cookies_accept(config_stub, qtbot, monkeypatch):
    """Test setCookiesFromUrl with cookies enabled."""
    config_stub.data = CONFIG_ALL_COOKIES
    ram_jar = cookies.RAMCookieJar()
    cookie = QNetworkCookie(b'foo', b'bar')
    url = QUrl('http://example.com/')
    with qtbot.waitSignal(ram_jar.changed):
        assert ram_jar.setCookiesFromUrl([cookie], url)

    # assert the cookies are added correctly
    all_cookies = ram_jar.cookiesForUrl(url)
    assert len(all_cookies) == 1
    saved_cookie = all_cookies[0]
    expected = cookie.name(), cookie.value()
    assert saved_cookie.name(), saved_cookie.value() == expected


def test_set_cookies_never_accept(qtbot, config_stub):
    """Test setCookiesFromUrl when cookies are not accepted."""
    config_stub.data = CONFIG_NEVER_COOKIES
    ram_jar = cookies.RAMCookieJar()

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

    with qtbot.assertNotEmitted(ram_jar.changed):
        assert not ram_jar.setCookiesFromUrl(url, 'test')
    assert not ram_jar.cookiesForUrl(url)


def test_cookie_jar_init(config_stub, fake_save_manager):
    """Test the CookieJar constructor."""
    line_parser_stub = [COOKIE1, COOKIE2]
    jar = cookies.CookieJar(line_parser=line_parser_stub)
    assert fake_save_manager.add_saveable.called

    # Test that cookies are added to the jar
    assert len(jar.allCookies()) == 2
    raw_cookies = [c.toRawForm().data() for c in jar.allCookies()]
    assert raw_cookies == [COOKIE1, COOKIE2]


def test_purge_old_cookies(config_stub, fake_save_manager):
    """Test that expired cookies are deleted."""
    line_parser_stub = [COOKIE1, COOKIE2, SESSION_COOKIE, EXPIRED_COOKIE]
    jar = cookies.CookieJar(line_parser=line_parser_stub)

    assert len(jar.allCookies()) == 4

    jar.purge_old_cookies()

    # Test that old cookies are gone
    raw_cookies = [cookie.toRawForm().data() for cookie in jar.allCookies()]
    assert raw_cookies == [COOKIE1, COOKIE2, SESSION_COOKIE]


def test_save(config_stub, fake_save_manager, monkeypatch, qapp):
    """Test that expired and session cookies are not saved."""
    monkeypatch.setattr(lineparser, 'LineParser', LineparserSaveStub)

    jar = cookies.CookieJar()
    jar._lineparser.data = [COOKIE1, COOKIE2, SESSION_COOKIE, EXPIRED_COOKIE]

    # Update the cookies on the jar itself
    jar.parse_cookies()
    jar.save()
    saved_cookies = [cookie.data() for cookie in jar._lineparser.saved]
    assert saved_cookies == [COOKIE1, COOKIE2]


def test_cookies_changed_emit(config_stub, fake_save_manager,
                              monkeypatch, qtbot):
    """Test that self.changed is emitted."""
    config_stub.data = CONFIG_COOKIES_ENABLED
    monkeypatch.setattr(lineparser, 'LineParser', LineparserSaveStub)
    jar = cookies.CookieJar()

    with qtbot.waitSignal(jar.changed):
        config_stub.set('content', 'cookies-store', False)


@pytest.mark.parametrize('store_cookies,empty', [(True, False), (False, True)])
def test_cookies_changed(config_stub, fake_save_manager, monkeypatch, qtbot,
                         store_cookies, empty):
    """Test that cookies are saved correctly."""
    config_stub.data = CONFIG_COOKIES_ENABLED
    monkeypatch.setattr(lineparser, 'LineParser', LineparserSaveStub)
    jar = cookies.CookieJar()
    jar._lineparser.data = [COOKIE1, COOKIE2]
    jar.parse_cookies()
    config_stub.set('content', 'cookies-store', store_cookies)

    if empty:
        assert not jar._lineparser.data
        assert not jar._lineparser.saved
    else:
        assert jar._lineparser.data