/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org

Telegram Desktop 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.

It 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.

Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
*/
#include "stdafx.h"
#include "platform/mac/main_window_mac.h"

#include "styles/style_window.h"
#include "mainwindow.h"
#include "mainwidget.h"
#include "application.h"
#include "historywidget.h"
#include "localstorage.h"
#include "window/notifications_manager_default.h"
#include "platform/platform_notifications_manager.h"
#include "boxes/contactsbox.h"
#include "boxes/aboutbox.h"
#include "lang.h"
#include "platform/mac/mac_utilities.h"

#include <Cocoa/Cocoa.h>
#include <CoreFoundation/CFURL.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/hidsystem/ev_keymap.h>
#include <SPMediaKeyTap.h>

@interface MainWindowObserver : NSObject {
}

- (id) init:(MainWindow::Private*)window;
- (void) activeSpaceDidChange:(NSNotification *)aNotification;
- (void) darkModeChanged:(NSNotification *)aNotification;
- (void) screenIsLocked:(NSNotification *)aNotification;
- (void) screenIsUnlocked:(NSNotification *)aNotification;
- (void) windowWillEnterFullScreen:(NSNotification *)aNotification;
- (void) windowWillExitFullScreen:(NSNotification *)aNotification;

@end

namespace Platform {

class MainWindow::Private {
public:
	Private(MainWindow *window);

	void setWindowBadge(const QString &str);
	void startBounce();

	void enableShadow(WId winId);

	bool filterNativeEvent(void *event);

	void willEnterFullScreen();
	void willExitFullScreen();

	void initCustomTitle(NSWindow *window, NSView *view);

	~Private();

private:
	MainWindow *_public;
	friend class MainWindow;

	MainWindowObserver *_observer;

};

} // namespace Platform

@implementation MainWindowObserver {

MainWindow::Private *_private;

}

- (id) init:(MainWindow::Private*)window {
	if (self = [super init]) {
		_private = window;
	}
	return self;
}

- (void) activeSpaceDidChange:(NSNotification *)aNotification {
	if (auto manager = Window::Notifications::Default::manager()) {
		manager->enumerateNotifications([](QWidget *widget) {
			objc_activateWnd(widget->winId());
		});
	}
}

- (void) darkModeChanged:(NSNotification *)aNotification {
	Notify::unreadCounterUpdated();
}

- (void) screenIsLocked:(NSNotification *)aNotification {
	Global::SetScreenIsLocked(true);
}

- (void) screenIsUnlocked:(NSNotification *)aNotification {
	Global::SetScreenIsLocked(false);
}

- (void) windowWillEnterFullScreen:(NSNotification *)aNotification {
	_private->willEnterFullScreen();
}

- (void) windowWillExitFullScreen:(NSNotification *)aNotification {
	_private->willExitFullScreen();
}

@end

namespace Platform {

MainWindow::Private::Private(MainWindow *window)
: _public(window)
, _observer([[MainWindowObserver alloc] init:this]) {
	@autoreleasepool {

	[[[NSWorkspace sharedWorkspace] notificationCenter] addObserver:_observer selector:@selector(activeSpaceDidChange:) name:NSWorkspaceActiveSpaceDidChangeNotification object:nil];
	[[NSDistributedNotificationCenter defaultCenter] addObserver:_observer selector:@selector(darkModeChanged:) name:Q2NSString(strNotificationAboutThemeChange()) object:nil];
	[[NSDistributedNotificationCenter defaultCenter] addObserver:_observer selector:@selector(screenIsLocked:) name:Q2NSString(strNotificationAboutScreenLocked()) object:nil];
	[[NSDistributedNotificationCenter defaultCenter] addObserver:_observer selector:@selector(screenIsUnlocked:) name:Q2NSString(strNotificationAboutScreenUnlocked()) object:nil];

#ifndef OS_MAC_STORE
	// Register defaults for the whitelist of apps that want to use media keys
	[[NSUserDefaults standardUserDefaults] registerDefaults:[NSDictionary dictionaryWithObjectsAndKeys:[SPMediaKeyTap defaultMediaKeyUserBundleIdentifiers], kMediaKeyUsingBundleIdentifiersDefaultsKey, nil]];
#endif // !OS_MAC_STORE

	}
}

void MainWindow::Private::setWindowBadge(const QString &str) {
	@autoreleasepool {

	[[NSApp dockTile] setBadgeLabel:Q2NSString(str)];

	}
}

void MainWindow::Private::startBounce() {
	[NSApp requestUserAttention:NSInformationalRequest];
}

void MainWindow::Private::initCustomTitle(NSWindow *window, NSView *view) {
	[window setStyleMask:[window styleMask] | NSFullSizeContentViewWindowMask];
	[window setTitlebarAppearsTransparent:YES];
	auto inner = [window contentLayoutRect];
	auto full = [view frame];
	_public->_customTitleHeight = qMax(qRound(full.size.height - inner.size.height), 0);

#ifndef OS_MAC_OLD
	[[NSNotificationCenter defaultCenter] addObserver:_observer selector:@selector(windowWillEnterFullScreen:) name:NSWindowWillEnterFullScreenNotification object:window];
	[[NSNotificationCenter defaultCenter] addObserver:_observer selector:@selector(windowWillExitFullScreen:) name:NSWindowWillExitFullScreenNotification object:window];
#endif // !OS_MAC_OLD
}

void MainWindow::Private::willEnterFullScreen() {
	_public->setTitleVisibility(false);
}

void MainWindow::Private::willExitFullScreen() {
	_public->setTitleVisibility(true);
}

void MainWindow::Private::enableShadow(WId winId) {
//	[[(NSView*)winId window] setStyleMask:NSBorderlessWindowMask];
//	[[(NSView*)winId window] setHasShadow:YES];
}

bool MainWindow::Private::filterNativeEvent(void *event) {
	NSEvent *e = static_cast<NSEvent*>(event);
	if (e && [e type] == NSSystemDefined && [e subtype] == SPSystemDefinedEventMediaKeys) {
#ifndef OS_MAC_STORE
		// If event tap is not installed, handle events that reach the app instead
		if (![SPMediaKeyTap usesGlobalMediaKeyTap]) {
			return objc_handleMediaKeyEvent(e);
		}
#else // !OS_MAC_STORE
		return objc_handleMediaKeyEvent(e);
#endif // else for !OS_MAC_STORE
	}
	return false;
}

MainWindow::Private::~Private() {
	[_observer release];
}

MainWindow::MainWindow()
: icon256(qsl(":/gui/art/icon256.png"))
, iconbig256(qsl(":/gui/art/iconbig256.png"))
, wndIcon(QPixmap::fromImage(iconbig256, Qt::ColorOnly))
, _private(std_::make_unique<Private>(this)) {
	QImage tray(qsl(":/gui/art/osxtray.png"));
	trayImg = tray.copy(0, cRetina() ? 0 : tray.width() / 2, tray.width() / (cRetina() ? 2 : 4), tray.width() / (cRetina() ? 2 : 4));
	trayImgSel = tray.copy(tray.width() / (cRetina() ? 2 : 4), cRetina() ? 0 : tray.width() / 2, tray.width() / (cRetina() ? 2 : 4), tray.width() / (cRetina() ? 2 : 4));

	_hideAfterFullScreenTimer.setSingleShot(true);
	connect(&_hideAfterFullScreenTimer, SIGNAL(timeout()), this, SLOT(onHideAfterFullScreen()));
}

void MainWindow::closeWithoutDestroy() {
	NSWindow *nsWindow = [reinterpret_cast<NSView*>(winId()) window];
	bool isFullScreen = (([nsWindow styleMask] & NSFullScreenWindowMask) == NSFullScreenWindowMask);
	if (isFullScreen) {
		_hideAfterFullScreenTimer.start(3000);
		[nsWindow toggleFullScreen:nsWindow];
	} else {
		hide();
	}
}

void MainWindow::stateChangedHook(Qt::WindowState state) {
	if (_hideAfterFullScreenTimer.isActive()) {
		_hideAfterFullScreenTimer.stop();
		QTimer::singleShot(0, this, SLOT(onHideAfterFullScreen()));
	}
}

void MainWindow::initHook() {
	_customTitleHeight = 0;
	if (auto view = reinterpret_cast<NSView*>(winId())) {
		if (auto window = [view window]) {
			if ([window respondsToSelector:@selector(contentLayoutRect)]
				&& [window respondsToSelector:@selector(setTitlebarAppearsTransparent:)]) {
				_private->initCustomTitle(window, view);
			}
		}
	}
}

void MainWindow::onHideAfterFullScreen() {
	hide();
}

QImage MainWindow::psTrayIcon(bool selected) const {
	return selected ? trayImgSel : trayImg;
}

void MainWindow::psShowTrayMenu() {
}

void MainWindow::psTrayMenuUpdated() {
}

void MainWindow::psSetupTrayIcon() {
	if (!trayIcon) {
		trayIcon = new QSystemTrayIcon(this);

		QIcon icon(QPixmap::fromImage(psTrayIcon(), Qt::ColorOnly));
		icon.addPixmap(QPixmap::fromImage(psTrayIcon(true), Qt::ColorOnly), QIcon::Selected);

		trayIcon->setIcon(icon);
		trayIcon->setToolTip(str_const_toString(AppName));
		connect(trayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)), this, SLOT(toggleTray(QSystemTrayIcon::ActivationReason)), Qt::UniqueConnection);
		App::wnd()->updateTrayMenu();
	}
	psUpdateCounter();

	trayIcon->show();
}

void MainWindow::psUpdateWorkmode() {
	psSetupTrayIcon();
	if (cWorkMode() == dbiwmWindowOnly) {
		if (trayIcon) {
			trayIcon->setContextMenu(0);
			delete trayIcon;
			trayIcon = nullptr;
		}
	}
	if (auto manager = Platform::Notifications::manager()) {
		manager->updateDelegate();
	}
}

void _placeCounter(QImage &img, int size, int count, const style::color &bg, const style::color &color) {
	if (!count) return;

	QPainter p(&img);
	QString cnt = (count < 100) ? QString("%1").arg(count) : QString("..%1").arg(count % 100, 2, 10, QChar('0'));
	int32 cntSize = cnt.size();

	p.setBrush(bg->b);
	p.setPen(Qt::NoPen);
	p.setRenderHint(QPainter::Antialiasing);
	int32 fontSize, skip;
	if (size == 22) {
		skip = 1;
		fontSize = 8;
	} else {
		skip = 2;
		fontSize = 16;
	}
	style::font f(fontSize, 0, 0);
	int32 w = f->width(cnt), d, r;
	if (size == 22) {
		d = (cntSize < 2) ? 3 : 2;
		r = (cntSize < 2) ? 6 : 5;
	} else {
		d = (cntSize < 2) ? 6 : 5;
		r = (cntSize < 2) ? 9 : 11;
	}
	p.drawRoundedRect(QRect(size - w - d * 2 - skip, size - f->height - skip, w + d * 2, f->height), r, r);

	p.setCompositionMode(QPainter::CompositionMode_Source);
	p.setFont(f->f);
	p.setPen(color->p);
	p.drawText(size - w - d - skip, size - f->height + f->ascent - skip, cnt);
}

void MainWindow::psUpdateCounter() {
	int32 counter = App::histories().unreadBadge();

	setWindowTitle((counter > 0) ? qsl("Telegram (%1)").arg(counter) : qsl("Telegram"));

	QString cnt = (counter < 1000) ? QString("%1").arg(counter) : QString("..%1").arg(counter % 100, 2, 10, QChar('0'));
	_private->setWindowBadge(counter ? cnt : QString());

	if (trayIcon) {
		bool muted = App::histories().unreadOnlyMuted();
		bool dm = objc_darkMode();

		auto &bg = (muted ? st::trayCounterBgMute : st::trayCounterBg);
		QIcon icon;
		QImage img(psTrayIcon(dm)), imgsel(psTrayIcon(true));
		img.detach();
		imgsel.detach();
		int32 size = cRetina() ? 44 : 22;
		_placeCounter(img, size, counter, bg, (dm && muted) ? st::trayCounterFgMacInvert : st::trayCounterFg);
		_placeCounter(imgsel, size, counter, st::trayCounterBgMacInvert, st::trayCounterFgMacInvert);
		icon.addPixmap(App::pixmapFromImageInPlace(std_::move(img)));
		icon.addPixmap(App::pixmapFromImageInPlace(std_::move(imgsel)), QIcon::Selected);
		trayIcon->setIcon(icon);
	}
}

void MainWindow::psFirstShow() {
	psUpdateMargins();

	bool showShadows = true;

	show();
	_private->enableShadow(winId());
	if (cWindowPos().maximized) {
		setWindowState(Qt::WindowMaximized);
	}

	if ((cLaunchMode() == LaunchModeAutoStart && cStartMinimized()) || cStartInTray()) {
		setWindowState(Qt::WindowMinimized);
		if (cWorkMode() == dbiwmTrayOnly || cWorkMode() == dbiwmWindowAndTray) {
			hide();
		} else {
			show();
		}
		showShadows = false;
	} else {
		show();
	}

	setPositionInited();

	createGlobalMenu();

	psMacUpdateMenu();
}

void MainWindow::createGlobalMenu() {
	auto main = psMainMenu.addMenu(qsl("Telegram"));
	auto about = main->addAction(lng_mac_menu_about_telegram(lt_telegram, qsl("Telegram")));
	connect(about, SIGNAL(triggered()), base::lambda_slot(about, [] {
		if (App::wnd() && App::wnd()->isHidden()) App::wnd()->showFromTray();
		Ui::showLayer(new AboutBox());
	}), SLOT(action()));
	about->setMenuRole(QAction::AboutQtRole);

	main->addSeparator();
	QAction *prefs = main->addAction(lang(lng_mac_menu_preferences), App::wnd(), SLOT(showSettings()), QKeySequence(Qt::ControlModifier | Qt::Key_Comma));
	prefs->setMenuRole(QAction::PreferencesRole);

	QMenu *file = psMainMenu.addMenu(lang(lng_mac_menu_file));
	psLogout = file->addAction(lang(lng_mac_menu_logout), App::wnd(), SLOT(onLogout()));

	QMenu *edit = psMainMenu.addMenu(lang(lng_mac_menu_edit));
	psUndo = edit->addAction(lang(lng_mac_menu_undo), this, SLOT(psMacUndo()), QKeySequence::Undo);
	psRedo = edit->addAction(lang(lng_mac_menu_redo), this, SLOT(psMacRedo()), QKeySequence::Redo);
	edit->addSeparator();
	psCut = edit->addAction(lang(lng_mac_menu_cut), this, SLOT(psMacCut()), QKeySequence::Cut);
	psCopy = edit->addAction(lang(lng_mac_menu_copy), this, SLOT(psMacCopy()), QKeySequence::Copy);
	psPaste = edit->addAction(lang(lng_mac_menu_paste), this, SLOT(psMacPaste()), QKeySequence::Paste);
	psDelete = edit->addAction(lang(lng_mac_menu_delete), this, SLOT(psMacDelete()), QKeySequence(Qt::ControlModifier | Qt::Key_Backspace));
	edit->addSeparator();
	psSelectAll = edit->addAction(lang(lng_mac_menu_select_all), this, SLOT(psMacSelectAll()), QKeySequence::SelectAll);

	QMenu *window = psMainMenu.addMenu(lang(lng_mac_menu_window));
	psContacts = window->addAction(lang(lng_mac_menu_contacts));
	connect(psContacts, SIGNAL(triggered()), base::lambda_slot(psContacts, [] {
		if (App::wnd() && App::wnd()->isHidden()) App::wnd()->showFromTray();

		if (!App::self()) return;
		Ui::showLayer(new ContactsBox());
	}), SLOT(action()));
	psAddContact = window->addAction(lang(lng_mac_menu_add_contact), App::wnd(), SLOT(onShowAddContact()));
	window->addSeparator();
	psNewGroup = window->addAction(lang(lng_mac_menu_new_group), App::wnd(), SLOT(onShowNewGroup()));
	psNewChannel = window->addAction(lang(lng_mac_menu_new_channel), App::wnd(), SLOT(onShowNewChannel()));
	window->addSeparator();
	psShowTelegram = window->addAction(lang(lng_mac_menu_show), App::wnd(), SLOT(showFromTray()));
}

namespace {
	void _sendKeySequence(Qt::Key key, Qt::KeyboardModifiers modifiers = Qt::NoModifier) {
		QWidget *focused = QApplication::focusWidget();
		if (qobject_cast<QLineEdit*>(focused) || qobject_cast<FlatTextarea*>(focused) || qobject_cast<HistoryInner*>(focused)) {
			QApplication::postEvent(focused, new QKeyEvent(QEvent::KeyPress, key, modifiers));
			QApplication::postEvent(focused, new QKeyEvent(QEvent::KeyRelease, key, modifiers));
		}
	}
	void _forceDisabled(QAction *action, bool disabled) {
		if (action->isEnabled()) {
			if (disabled) action->setDisabled(true);
		} else if (!disabled) {
			action->setDisabled(false);
		}
	}
}

void MainWindow::psMacUndo() {
	_sendKeySequence(Qt::Key_Z, Qt::ControlModifier);
}

void MainWindow::psMacRedo() {
	_sendKeySequence(Qt::Key_Z, Qt::ControlModifier | Qt::ShiftModifier);
}

void MainWindow::psMacCut() {
	_sendKeySequence(Qt::Key_X, Qt::ControlModifier);
}

void MainWindow::psMacCopy() {
	_sendKeySequence(Qt::Key_C, Qt::ControlModifier);
}

void MainWindow::psMacPaste() {
	_sendKeySequence(Qt::Key_V, Qt::ControlModifier);
}

void MainWindow::psMacDelete() {
	_sendKeySequence(Qt::Key_Delete);
}

void MainWindow::psMacSelectAll() {
	_sendKeySequence(Qt::Key_A, Qt::ControlModifier);
}

void MainWindow::psInitSysMenu() {
}

void MainWindow::psUpdateSysMenu(Qt::WindowState state) {
}

void MainWindow::psUpdateMargins() {
}

void MainWindow::psMacUpdateMenu() {
	if (!positionInited()) return;

	QWidget *focused = QApplication::focusWidget();
	bool isLogged = !!App::self(), canUndo = false, canRedo = false, canCut = false, canCopy = false, canPaste = false, canDelete = false, canSelectAll = false;
	if (auto edit = qobject_cast<QLineEdit*>(focused)) {
		canCut = canCopy = canDelete = edit->hasSelectedText();
		canSelectAll = !edit->text().isEmpty();
		canUndo = edit->isUndoAvailable();
		canRedo = edit->isRedoAvailable();
		canPaste = !Application::clipboard()->text().isEmpty();
	} else if (auto edit = qobject_cast<FlatTextarea*>(focused)) {
		canCut = canCopy = canDelete = edit->textCursor().hasSelection();
		canSelectAll = !edit->isEmpty();
		canUndo = edit->isUndoAvailable();
		canRedo = edit->isRedoAvailable();
		canPaste = !Application::clipboard()->text().isEmpty();
	} else if (auto list = qobject_cast<HistoryInner*>(focused)) {
		canCopy = list->canCopySelected();
		canDelete = list->canDeleteSelected();
	}
	_forceDisabled(psLogout, !isLogged && !App::passcoded());
	_forceDisabled(psUndo, !canUndo);
	_forceDisabled(psRedo, !canRedo);
	_forceDisabled(psCut, !canCut);
	_forceDisabled(psCopy, !canCopy);
	_forceDisabled(psPaste, !canPaste);
	_forceDisabled(psDelete, !canDelete);
	_forceDisabled(psSelectAll, !canSelectAll);
	_forceDisabled(psContacts, !isLogged || App::passcoded());
	_forceDisabled(psAddContact, !isLogged || App::passcoded());
	_forceDisabled(psNewGroup, !isLogged || App::passcoded());
	_forceDisabled(psNewChannel, !isLogged || App::passcoded());
	_forceDisabled(psShowTelegram, App::wnd()->isActive(false));
}

void MainWindow::psFlash() {
	return _private->startBounce();
}

bool MainWindow::psFilterNativeEvent(void *event) {
	return _private->filterNativeEvent(event);
}

bool MainWindow::eventFilter(QObject *obj, QEvent *evt) {
	QEvent::Type t = evt->type();
	if (t == QEvent::FocusIn || t == QEvent::FocusOut) {
		if (qobject_cast<QLineEdit*>(obj) || qobject_cast<FlatTextarea*>(obj) || qobject_cast<HistoryInner*>(obj)) {
			psMacUpdateMenu();
		}
	}
	return Window::MainWindow::eventFilter(obj, evt);
}

MainWindow::~MainWindow() {
}

} // namespace