/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "graphics/macgui/macpopupmenu.h"
#include "graphics/macgui/macwindowmanager.h"

namespace Graphics {

MacPopUp::MacPopUp(int id, const Common::Rect &bounds, MacWindowManager *wm, const char *string) : MacMenu(id, bounds, wm) {
	_menuItemId = addMenuItem(nullptr, "");
	createSubMenuFromString(0, string, 0);
	wm->addMenu(id, this);
	_menuId = id;
}

bool MacPopUp::draw(ManagedSurface *g, bool forceRedraw) {

	if (!_isVisible)
		return false;

	if (_dimensionsDirty)
		calcSubMenuBounds(_items[0]->submenu, _mouseX, _mouseY + _offsetY);

	if (!_contentIsDirty && !forceRedraw)
		return false;
	_contentIsDirty = false;

	_screen.clear(_wm->_colorGreen);
	renderSubmenu(_items[0]->submenu, false);

	if (g)
		g->transBlitFrom(_screen, _wm->_colorGreen);

	if (!(_wm->_mode & kWMModalMenuMode) && g)
		g_system->copyRectToScreen(g->getPixels(), g->pitch, 0, 0, g->w, g->h);

	return true;
}

void MacPopUp::closeMenu() {
	// Special handling of popup closing (for example when displaying closing animation)
	int activeSubItem = getLastSelectedSubmenuItem(); // Find selected item

	if (activeSubItem != -1) {
		// Do the blinking animation
		for (int i = 0; i < kNumBlinks; i++) {
			_items[0]->submenu->highlight = -1; // No selection
			draw(_wm->_screen, true);
			g_system->updateScreen();
			g_system->delayMillis(kBlinkDelay);

			_items[0]->submenu->highlight = activeSubItem; // Selection
			draw(_wm->_screen, true);
			g_system->updateScreen();
			g_system->delayMillis(kBlinkDelay);
		}
	}

	if (_isSmart && activeSubItem != -1) {
		// Smart menu, open menu at offset position (so selected item under cursor)
		int yDisplace = -activeSubItem * _menuDropdownItemHeight;
		_offsetY = _mouseY + yDisplace > 0 ? yDisplace : -_mouseY; // If offset sum gets out of window, then position menu to 0 (ie below top of window)

		// Checkmark handling
		setCheckMark(_items[0]->submenu->items[activeSubItem], true);

		// // Uncheck previous item if checked
		if (_prevCheckedItem != -1 && _prevCheckedItem != activeSubItem) {
			setCheckMark(_items[0]->submenu->items[_prevCheckedItem], false);
		}

		_prevCheckedItem = activeSubItem;
	}

	_isModal = false;

	// Close now
	MacMenu::closeMenu();
}

uint32 MacPopUp::drawAndSelectMenu(int x, int y, int item) {
	_mouseX = x;
	_mouseY = y;

	// If menu is not active, then activate it!
	if (!_active)
		_wm->activateMenu();
	setActive(true);

	_contentIsDirty = true; // Set true to force refresh menu open changes

	_isModal = true;

	// Push our submenu to stack
	_menustack.clear();
	_menustack.push_back(_items[0]->submenu);

	_items[0]->submenu->visStart = 0;
	_items[0]->submenu->visEnd = 0;
	_items[0]->submenu->scroll = 0;
	_offsetY = 0;

	if (_isSmart) {
		int activeSubItem = getLastSelectedSubmenuItem();

		if (activeSubItem != -1)
			_offsetY = -activeSubItem * _menuDropdownItemHeight;
		else if (_prevCheckedItem != -1)
			_offsetY = -_prevCheckedItem * _menuDropdownItemHeight;

		while (_offsetY + _mouseY < 0) {
			_offsetY += _menuDropdownItemHeight;

			_items[0]->submenu->visStart++;
		}

		int itemsLeft = _items[0]->submenu->items.size() - _items[0]->submenu->visStart;
		int spaceLeft = _screen.h - MIN(_mouseY + _offsetY, _mouseY);
		_items[0]->submenu->visEnd = MAX(0, itemsLeft - spaceLeft / _menuDropdownItemHeight);
	}


	// Highlight previous item if smart menu
	if (_isSmart && getLastSelectedSubmenuItem() != -1) {
		_activeItem = 0;
		_activeSubItem = getLastSelectedSubmenuItem();
		// Also select the item
		_items[0]->submenu->highlight = getLastSelectedSubmenuItem();
	}

	// Display menu and update according to events
	this->draw(_wm->_screen);
	eventLoop();

	int activeSubItem = getLastSelectedSubmenuItem();
	if (activeSubItem == -1)
		return item;

	// Return one indexed item!
	return activeSubItem + 1;
}

Common::String MacPopUp::getItemText(int item) {
	// Convert 1-indexed item to 0 indexed
	item = item - 1;
	MacMenuItem *menu = getMenuItem(_menuItemId);
	MacMenuItem *submenu = getSubMenuItem(menu, item);
	return getName(submenu);
}
} // end of namespace Graphics