/* This file is part of Clementine.
   Copyright 2012, David Sansome <me@davidsansome.com>

   Clementine 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.

   Clementine 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 Clementine.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "appearancesettingspage.h"

#include <QApplication>
#include <QColorDialog>
#include <QSettings>

#include "iconloader.h"
#include "settingsdialog.h"
#include "ui_appearancesettingspage.h"
#include "core/appearance.h"
#include "core/logging.h"

AppearanceSettingsPage::AppearanceSettingsPage(SettingsDialog* dialog)
  : SettingsPage(dialog),
    ui_(new Ui_AppearanceSettingsPage),
    original_use_a_custom_color_set_(false)
{
  ui_->setupUi(this);
  setWindowIcon(IconLoader::Load("view-media-visualization"));

  Load();

  ui_->use_system_color_set->setChecked(!original_use_a_custom_color_set_);
  ui_->use_a_custom_color_set->setChecked(original_use_a_custom_color_set_);

  connect(ui_->select_foreground_color, SIGNAL(pressed()), SLOT(SelectForegroundColor()));
  connect(ui_->select_background_color, SIGNAL(pressed()), SLOT(SelectBackgroundColor()));
  connect(ui_->use_a_custom_color_set, SIGNAL(toggled(bool)), SLOT(UseCustomColorSetOptionChanged(bool)));
}

AppearanceSettingsPage::~AppearanceSettingsPage() {
  delete ui_;
}

void AppearanceSettingsPage::Load() {
  QSettings s;
  s.beginGroup(Appearance::kSettingsGroup);

  QPalette p = QApplication::palette();

  // Keep in mind originals colors, in case the user clicks on Cancel, to be
  // able to restore colors
  original_use_a_custom_color_set_ = s.value(Appearance::kUseCustomColorSet, false).toBool();
  
  original_foreground_color_  = s.value(Appearance::kForegroundColor,
                                        p.color(QPalette::WindowText)).value<QColor>();
  current_foreground_color_   = original_foreground_color_;
  original_background_color_  = s.value(Appearance::kBackgroundColor,
                                        p.color(QPalette::Window)).value<QColor>();
  current_background_color_   = original_background_color_;

  InitColorSelectorsColors();
}

void AppearanceSettingsPage::Save() {
  QSettings s;
  s.beginGroup(Appearance::kSettingsGroup);
  bool use_a_custom_color_set = ui_->use_a_custom_color_set->isChecked();
  s.setValue(Appearance::kUseCustomColorSet, use_a_custom_color_set);
  if (use_a_custom_color_set) {
    s.setValue(Appearance::kBackgroundColor, current_background_color_);
    s.setValue(Appearance::kForegroundColor, current_foreground_color_);
  } else {
    dialog()->appearance()->ResetToSystemDefaultTheme();
  }
}

void AppearanceSettingsPage::Cancel() {
  if (original_use_a_custom_color_set_) {
    dialog()->appearance()->ChangeForegroundColor(original_foreground_color_);
    dialog()->appearance()->ChangeBackgroundColor(original_background_color_);
  } else {
    dialog()->appearance()->ResetToSystemDefaultTheme();
  }
}

void AppearanceSettingsPage::SelectForegroundColor() {
  QColor color_selected = QColorDialog::getColor(current_foreground_color_);
  if (!color_selected.isValid())
    return;
  
  current_foreground_color_ = color_selected;
  dialog()->appearance()->ChangeForegroundColor(color_selected);

  UpdateColorSelectorColor(ui_->select_foreground_color, color_selected);
}

void AppearanceSettingsPage::SelectBackgroundColor() {
  QColor color_selected = QColorDialog::getColor(current_background_color_);
  if (!color_selected.isValid())
    return;
  
  current_background_color_ = color_selected;
  dialog()->appearance()->ChangeBackgroundColor(color_selected);

  UpdateColorSelectorColor(ui_->select_background_color, color_selected);
}

void AppearanceSettingsPage::UseCustomColorSetOptionChanged(bool checked) {
  if (checked) {
    dialog()->appearance()->ChangeForegroundColor(current_foreground_color_);
    dialog()->appearance()->ChangeBackgroundColor(current_background_color_);
  } else {
    dialog()->appearance()->ResetToSystemDefaultTheme();
  }
}

void AppearanceSettingsPage::InitColorSelectorsColors() {
  UpdateColorSelectorColor(ui_->select_foreground_color, current_foreground_color_);
  UpdateColorSelectorColor(ui_->select_background_color, current_background_color_);
}

void AppearanceSettingsPage::UpdateColorSelectorColor(QWidget* color_selector, const QColor& color) {
  QString css = QString("background-color: rgb(%1, %2, %3); color: rgb(255, 255, 255)")
      .arg(color.red())
      .arg(color.green())
      .arg(color.blue());
  color_selector->setStyleSheet(css);
}