/* ============================================================
 *     The rekonq project
 * ============================================================
 * SPDX-License-Identifier: GPL-3.0-only
 * Copyright (C) 2022 aqua <aqua@iserlohn-fortress.net>
 * ============================================================ */

#include <QApplication>
#include <QDialogButtonBox>
#include <QFile>
#include <QLineEdit>
#include <QPushButton>
#include <QSettings>
#include <QStandardPaths>
#include <gtest/gtest.h>

// Software under Test
#include "../helpers.hpp"
#include "../settings.hpp"
#include "../settingsdialog.h"
#include "settings_mock.hpp"

using ::testing::_; // NOLINT(bugprone-reserved-identifier)
using ::testing::AtLeast;
using ::testing::ContainerEq;
using ::testing::Return;
using ::testing::ReturnArg;

MATCHER_P(QStringEq, a, "")
{
  *result_listener << "where the arg is " << qUtf8Printable(arg);
  return arg.compare(a) == 0;
}
MATCHER_P(QVariantEq, a, "")
{
  *result_listener << "where the arg is " << qUtf8Printable(arg.toString());
  return arg == QVariant(a);
}

TEST(settings, getFont)
{
  const auto serif = getFont(QFont::Serif);
  EXPECT_EQ(serif.styleHint(), QFont::Serif) << qUtf8Printable(serif.toString());

  const auto fixed = getFont(QFont::Monospace);
  EXPECT_EQ(fixed.styleHint(), QFont::Monospace) << qUtf8Printable(fixed.toString());
}

TEST(settings, settingsPath)
{
  const auto path = Settings::path();
  EXPECT_FALSE(path.isEmpty());
  EXPECT_TRUE(path.endsWith("rekonqrc"));

  QFile defaultSettingsPath(":/settings/rekonqrc");
  EXPECT_TRUE(defaultSettingsPath.exists());
}

class TestSettings : public Settings {
public:
  TestSettings(const QString &path = QString()) : Settings(path, nullptr){};
  ~TestSettings() override = default;

  [[nodiscard]] auto groups() const { return d->childGroups(); }
  [[nodiscard]] auto keys() const { return d->childKeys(); }
};

TEST(settings, Settings)
{
  TestSettings settings;
  EXPECT_TRUE(settings.filePath().isEmpty());

  EXPECT_TRUE(settings.groups().isEmpty());
  EXPECT_TRUE(settings.keys().isEmpty());

  const auto FirstRun = settings.value("FirstRun");
  EXPECT_TRUE(FirstRun.isValid());
  EXPECT_TRUE(FirstRun.toBool());

  settings.setValue("FirstRun", false);
  EXPECT_FALSE(settings.value("FirstRun").toBool());

  EXPECT_TRUE(settings.groups().isEmpty());
  EXPECT_EQ(settings.keys().count(), 1);

  settings.beginGroup("Network");
  const auto downloadPathAsk = settings.value("downloadPathAsk");
  EXPECT_TRUE(downloadPathAsk.isValid());
  EXPECT_TRUE(downloadPathAsk.toBool());
  settings.endGroup();

  const auto searchUrl = settings.value("searchUrl");
  EXPECT_TRUE(searchUrl.isValid());
  EXPECT_EQ(searchUrl.toString(), QString("https://duckduckgo.com/?q=%1"));

  EXPECT_TRUE(settings.groups().isEmpty());
  EXPECT_EQ(settings.keys().count(), 1);
}

TEST(settings, SettingsDialog_mock)
{
  constexpr unsigned n_settings = 36; // there are 36 settings in total
  MockSettings mockSettings;
  // There are 4 groups in total, but General should not be calling beginGroup/endGroup
  // beginGroup/endGroup are called twice: during the ctor and when accepted
  EXPECT_CALL(mockSettings, beginGroup).Times(3 * 4);
  EXPECT_CALL(mockSettings, endGroup).Times(3 * 4);
  EXPECT_CALL(mockSettings, value).Times(n_settings * 2 - 2).WillRepeatedly(ReturnArg<0>());
  EXPECT_CALL(mockSettings, value(QStringEq("homepage"))).Times(2).WillRepeatedly(Return(QVariant("about:blank")));
  // expect accept to call setValue on all non-hidden settings
  EXPECT_CALL(mockSettings, setValue(_, _)).Times(n_settings - 2);
  EXPECT_CALL(mockSettings, setValue(QStringEq("homepage"), QVariantEq("https://kde.org")));
  EXPECT_CALL(mockSettings, setValue(QStringEq("FirstRun"), QVariantEq(false)));
  // expect resetBtn to call resetValue on all non-hidden settings
  EXPECT_CALL(mockSettings, resetValue).Times(n_settings - 1);

  // change setting
  {
    SettingsDialog dlg(&mockSettings);
    auto *homepage = dlg.findChild<QLineEdit *>("homepage");
    ASSERT_FALSE(homepage == nullptr);
    EXPECT_TRUE(homepage->text() == QLatin1String("about:blank")) << qUtf8Printable(homepage->text());
    homepage->setText("https://kde.org");
    dlg.accept();
  }

  // reset setting
  {
    SettingsDialog dlg(&mockSettings);
    auto *resetBtn = dlg.findChild<QDialogButtonBox *>()->button(QDialogButtonBox::RestoreDefaults);
    ASSERT_FALSE(resetBtn == nullptr);
    resetBtn->click();
  }
}

TEST(settings, SettingsDialog)
{
  const auto path = Settings::path();
  ASSERT_FALSE(QFile::exists(path));

  {
    Settings settings(path);
    EXPECT_TRUE(settings.value("FirstRun").toBool());

    SettingsDialog dlg(&settings);
    auto *resetBtn = dlg.findChild<QDialogButtonBox *>()->button(QDialogButtonBox::RestoreDefaults);
    ASSERT_FALSE(resetBtn == nullptr);
    resetBtn->click();
  }

  ASSERT_TRUE(QFile::exists(path));
  ASSERT_TRUE(QFile::remove(path));
}

int main(int argc, char **argv)
{
  ::testing::InitGoogleTest(&argc, argv);
  Q_INIT_RESOURCE(settings);

  QApplication app(argc, argv);
  QStandardPaths::setTestModeEnabled(true);

  return RUN_ALL_TESTS();
}