// This file is part of RSS Guard.
//
// Copyright (C) 2011-2017 by Martin Rotter <rotter.martinos@gmail.com>
//
// RSS Guard 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.
//
// RSS Guard 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 RSS Guard. If not, see <http://www.gnu.org/licenses/>.

#include "dynamic-shortcuts/dynamicshortcutswidget.h"

#include "dynamic-shortcuts/shortcutcatcher.h"
#include "dynamic-shortcuts/shortcutbutton.h"
#include "definitions/definitions.h"

#include <QGridLayout>
#include <QAction>
#include <QLabel>


DynamicShortcutsWidget::DynamicShortcutsWidget(QWidget* parent) : QWidget(parent) {
	// Create layout for this control and set is as active.
	m_layout = new QGridLayout(this);
	m_layout->setMargin(0);
	setLayout(m_layout);
}

DynamicShortcutsWidget::~DynamicShortcutsWidget() {
	delete m_layout;
}

bool DynamicShortcutsWidget::areShortcutsUnique() const {
	QList<QKeySequence> all_shortcuts;

	// Obtain all shortcuts.
	foreach (const ActionBinding& binding, m_actionBindings) {
		const QKeySequence new_shortcut = binding.second->shortcut();

		if (!new_shortcut.isEmpty() && all_shortcuts.contains(new_shortcut)) {
			// Problem, two identical non-empty shortcuts found.
			return false;
		}
		else {
			all_shortcuts.append(binding.second->shortcut());
		}
	}

	return true;
}

void DynamicShortcutsWidget::updateShortcuts() {
	foreach (const ActionBinding& binding, m_actionBindings) {
		binding.first->setShortcut(binding.second->shortcut());
	}
}

void DynamicShortcutsWidget::populate(QList<QAction*> actions) {
	m_actionBindings.clear();
	qSort(actions.begin(), actions.end(), DynamicShortcutsWidget::lessThan);
	int row_id = 0;

	// FIXME: Maybe separate actions into "categories". Each category will start with label.
	// I will assign each QAaction a property called "category" with some enum value.
	// Like:
	//  File, FeedsCategories, Messages, Tools, WebBrowser, Help
	// This will be setup in FormMain::allActions().
	// Then here I will process actions into categories.

	foreach (QAction* action, actions) {
		// Create shortcut catcher for this action and set default shortcut.
		ShortcutCatcher* catcher = new ShortcutCatcher(this);
		catcher->setDefaultShortcut(action->shortcut());
		// Store information for re-initialization of shortcuts
		// of actions when widget gets "confirmed".
		QPair<QAction*, ShortcutCatcher*> new_binding;
		new_binding.first = action;
		new_binding.second = catcher;
		m_actionBindings << new_binding;
		// Add new catcher to our control.
		QLabel* action_label = new QLabel(this);
		action_label->setText(action->text().remove(QSL("&")));
		action_label->setToolTip(action->toolTip());
		action_label->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Preferred);
		QLabel* action_icon = new QLabel(this);
		action_icon->setPixmap(action->icon().pixmap(ICON_SIZE_SETTINGS, ICON_SIZE_SETTINGS));
		action_icon->setToolTip(action->toolTip());
		m_layout->addWidget(action_icon, row_id, 0);
		m_layout->addWidget(action_label, row_id, 1);
		m_layout->addWidget(catcher, row_id, 2);
		row_id++;
		connect(catcher, &ShortcutCatcher::shortcutChanged, this, &DynamicShortcutsWidget::setupChanged);
	}

	// Make sure that "spacer" is added.
	m_layout->setRowStretch(row_id, 1);
	m_layout->setColumnStretch(1, 1);
}

bool DynamicShortcutsWidget::lessThan(QAction* lhs, QAction* rhs) {
	return QString::localeAwareCompare(lhs->text().replace(QL1S("&"), QString()), rhs->text().replace(QL1S("&"), QString())) < 0;
}