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

# Copyright 2014-2020 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/>.

import logging
from unittest import mock

from PyQt5.QtCore import Qt, QSize
from PyQt5.QtWidgets import QApplication, QWidget
import pytest

from qutebrowser.misc import miscwidgets
from qutebrowser.browser import inspector


class TestCommandLineEdit:

    """Tests for CommandLineEdit widget."""

    @pytest.fixture
    def cmd_edit(self, qtbot):
        """Fixture to initialize a CommandLineEdit."""
        cmd_edit = miscwidgets.CommandLineEdit()
        cmd_edit.set_prompt(':')
        qtbot.add_widget(cmd_edit)
        assert cmd_edit.text() == ''
        yield cmd_edit

    @pytest.fixture
    def mock_clipboard(self, mocker):
        """Fixture to mock QApplication.clipboard.

        Return:
            The mocked QClipboard object.
        """
        mocker.patch.object(QApplication, 'clipboard')
        clipboard = mock.MagicMock()
        clipboard.supportsSelection.return_value = True
        QApplication.clipboard.return_value = clipboard
        return clipboard

    def test_position(self, qtbot, cmd_edit):
        """Test cursor position based on the prompt."""
        qtbot.keyClicks(cmd_edit, ':hello')
        assert cmd_edit.text() == ':hello'
        assert cmd_edit.cursorPosition() == len(':hello')

        cmd_edit.home(True)
        assert cmd_edit.cursorPosition() == len(':')
        qtbot.keyClick(cmd_edit, Qt.Key_Delete)
        assert cmd_edit.text() == ':'
        qtbot.keyClick(cmd_edit, Qt.Key_Backspace)
        assert cmd_edit.text() == ':'

        qtbot.keyClicks(cmd_edit, 'hey again')
        assert cmd_edit.text() == ':hey again'

    def test_invalid_prompt(self, qtbot, cmd_edit):
        """Test preventing of an invalid prompt being entered."""
        qtbot.keyClicks(cmd_edit, '$hello')
        assert cmd_edit.text() == ''

    def test_selection_home(self, qtbot, cmd_edit):
        """Test selection persisting when pressing home."""
        qtbot.keyClicks(cmd_edit, ':hello')
        assert cmd_edit.text() == ':hello'
        assert cmd_edit.cursorPosition() == len(':hello')
        cmd_edit.home(True)
        assert cmd_edit.cursorPosition() == len(':')
        assert cmd_edit.selectionStart() == len(':')

    def test_selection_cursor_left(self, qtbot, cmd_edit):
        """Test selection persisting when moving to the first char."""
        qtbot.keyClicks(cmd_edit, ':hello')
        assert cmd_edit.text() == ':hello'
        assert cmd_edit.cursorPosition() == len(':hello')
        for _ in ':hello':
            qtbot.keyClick(cmd_edit, Qt.Key_Left, modifier=Qt.ShiftModifier)
        assert cmd_edit.cursorPosition() == len(':')
        assert cmd_edit.selectionStart() == len(':')


class WrappedWidget(QWidget):

    def sizeHint(self):
        return QSize(23, 42)


class TestWrapperLayout:

    @pytest.fixture
    def container(self, qtbot):
        wrapped = WrappedWidget()
        parent = QWidget()
        qtbot.add_widget(wrapped)
        qtbot.add_widget(parent)
        layout = miscwidgets.WrapperLayout(parent)
        layout.wrap(parent, wrapped)
        parent.wrapped = wrapped
        return parent

    def test_size_hint(self, container):
        assert container.sizeHint() == QSize(23, 42)

    def test_wrapped(self, container):
        assert container.wrapped.parent() is container
        assert container.focusProxy() is container.wrapped


class TestFullscreenNotification:

    @pytest.mark.parametrize('bindings, text', [
        ({'<escape>': 'fullscreen --leave'},
         "Press <Escape> to exit fullscreen."),
        ({'<escape>': 'fullscreen'}, "Page is now fullscreen."),
        ({'a': 'fullscreen --leave'}, "Press a to exit fullscreen."),
        ({}, "Page is now fullscreen."),
    ])
    def test_text(self, qtbot, config_stub, key_config_stub, bindings, text):
        config_stub.val.bindings.default = {}
        config_stub.val.bindings.commands = {'normal': bindings}
        w = miscwidgets.FullscreenNotification()
        qtbot.add_widget(w)
        assert w.text() == text

    def test_timeout(self, qtbot, key_config_stub):
        w = miscwidgets.FullscreenNotification()
        qtbot.add_widget(w)
        with qtbot.waitSignal(w.destroyed):
            w.set_timeout(1)


@pytest.mark.usefixtures('state_config')
class TestInspectorSplitter:

    @pytest.fixture
    def fake_webview(self, blue_widget):
        return blue_widget

    @pytest.fixture
    def fake_inspector(self, red_widget):
        return red_widget

    @pytest.fixture
    def splitter(self, qtbot, fake_webview):
        inspector_splitter = miscwidgets.InspectorSplitter(fake_webview)
        qtbot.add_widget(inspector_splitter)
        return inspector_splitter

    def test_no_inspector(self, splitter, fake_webview):
        assert splitter.count() == 1
        assert splitter.widget(0) is fake_webview
        assert splitter.focusProxy() is fake_webview

    def test_no_inspector_resize(self, splitter):
        splitter.show()
        splitter.resize(800, 600)

    @pytest.mark.parametrize(
        'position, orientation, inspector_idx, webview_idx', [
            (inspector.Position.left, Qt.Horizontal, 0, 1),
            (inspector.Position.right, Qt.Horizontal, 1, 0),
            (inspector.Position.top, Qt.Vertical, 0, 1),
            (inspector.Position.bottom, Qt.Vertical, 1, 0),
        ]
    )
    def test_set_inspector(self, position, orientation,
                           inspector_idx, webview_idx,
                           splitter, fake_inspector, fake_webview):
        splitter.set_inspector(fake_inspector, position)

        assert splitter.indexOf(fake_inspector) == inspector_idx
        assert splitter._inspector_idx == inspector_idx

        assert splitter.indexOf(fake_webview) == webview_idx
        assert splitter._main_idx == webview_idx

        assert splitter.orientation() == orientation

    @pytest.mark.parametrize(
        'config, width, height, position, expected_size', [
            # No config but enough big window
            (None, 1024, 768, inspector.Position.left, 512),
            (None, 1024, 768, inspector.Position.top, 384),
            # No config and small window
            (None, 320, 240, inspector.Position.left, 300),
            (None, 320, 240, inspector.Position.top, 300),
            # Invalid config
            ('verybig', 1024, 768, inspector.Position.left, 512),
            # Value from config
            ('666', 1024, 768, inspector.Position.left, 666),
        ]
    )
    def test_read_size(self, config, width, height, position, expected_size,
                       state_config, splitter, fake_inspector, caplog):
        if config is not None:
            state_config['inspector'] = {position.name: config}

        splitter.resize(width, height)
        assert splitter.size() == QSize(width, height)

        with caplog.at_level(logging.ERROR):
            splitter.set_inspector(fake_inspector, position)

        assert splitter._preferred_size == expected_size

        if config == {'left': 'verybig'}:
            assert caplog.messages == ["Could not read inspector size: "
                                       "invalid literal for int() with "
                                       "base 10: 'verybig'"]

    @pytest.mark.parametrize('position', [
        inspector.Position.left,
        inspector.Position.right,
        inspector.Position.top,
        inspector.Position.bottom,
    ])
    def test_save_size(self, position, state_config, splitter, fake_inspector):
        splitter.set_inspector(fake_inspector, position)
        splitter._preferred_size = 1337
        splitter._save_preferred_size()
        assert state_config['inspector'][position.name] == '1337'

    @pytest.mark.parametrize(
        'old_window_size, preferred_size, new_window_size, '
        'exp_inspector_size', [
            # Plenty of space -> Keep inspector at configured absolute size
            (600, 300,  # 1/2 of window
             500, 300),  # 300px of 600px -> 300px of 500px

            # Slowly running out of space -> Reserve space for website
            (600, 450,  # 3/4 of window
             500, 350),  # 450px of 600px -> 350px of 500px
                         # (so website has 150px)

            # Very small window -> Keep ratio distribution
            (600, 300,  # 1/2 of window
             200, 100),  # 300px of 600px -> 100px of 200px (1/2)
        ]
    )
    @pytest.mark.parametrize('position', [
        inspector.Position.left, inspector.Position.right,
        inspector.Position.top, inspector.Position.bottom])
    def test_adjust_size(self, old_window_size, preferred_size,
                         new_window_size, exp_inspector_size,
                         position, splitter, fake_inspector, qtbot):
        def resize(dim):
            size = (QSize(dim, 666) if splitter.orientation() == Qt.Horizontal
                    else QSize(666, dim))
            splitter.resize(size)
            if splitter.size() != size:
                pytest.skip("Resizing window failed")

        splitter.set_inspector(fake_inspector, position)
        splitter.show()
        resize(old_window_size)

        handle_width = 4
        splitter.setHandleWidth(handle_width)

        splitter_idx = 1
        if position in [inspector.Position.left, inspector.Position.top]:
            splitter_pos = preferred_size - handle_width//2
        else:
            splitter_pos = old_window_size - preferred_size - handle_width//2
        splitter.moveSplitter(splitter_pos, splitter_idx)

        resize(new_window_size)

        sizes = splitter.sizes()
        inspector_size = sizes[splitter._inspector_idx]
        main_size = sizes[splitter._main_idx]
        exp_main_size = new_window_size - exp_inspector_size

        exp_main_size -= handle_width // 2
        exp_inspector_size -= handle_width // 2

        assert (inspector_size, main_size) == (exp_inspector_size,
                                               exp_main_size)