/* 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 "engines/stark/ui/world/topmenu.h"
#include "engines/stark/ui/cursor.h"
#include "engines/stark/ui/world/button.h"
#include "engines/stark/gfx/driver.h"
#include "engines/stark/resources/knowledgeset.h"
#include "engines/stark/resources/sound.h"
#include "engines/stark/services/diary.h"
#include "engines/stark/services/global.h"
#include "engines/stark/services/services.h"
#include "engines/stark/services/userinterface.h"
#include "engines/stark/services/gamemessage.h"
#include "engines/stark/visual/image.h"

namespace Stark {

TopMenu::TopMenu(Gfx::Driver *gfx, Cursor *cursor) :
		Window(gfx, cursor),
		_widgetsVisible(false),
		_newInventoryItemExplosionAnimTimeRemaining(0),
		_newDiaryEntryAnimTimeRemaining(0),
		_newInventoryItemChestClosingAnimTimeRemaining(0) {

	_position = Common::Rect(Gfx::Driver::kOriginalWidth, Gfx::Driver::kTopBorderHeight);
	_visible = true;

	Common::String inventoryText = StarkGameMessage->getTextByKey(GameMessage::kInventory);
	Common::String optionsText = StarkGameMessage->getTextByKey(GameMessage::kOptions);
	Common::String quitText = StarkGameMessage->getTextByKey(GameMessage::kQuit);

	_inventoryButton = new Button(inventoryText, StaticProvider::kInventory, Common::Point(32, 2), Button::kAlignLeft, Common::Point(64, 20));
	_optionsButton = new Button(optionsText, StaticProvider::kDiaryNormal, Common::Point(560, 2), Button::kAlignRight, Common::Point(560, 20));
	_exitButton = new Button(quitText, StaticProvider::kQuit, Common::Point(608, 2), Button::kAlignRight, Common::Point(608, 20));

	_inventoryNewItemSound = StarkStaticProvider->getUISound(StaticProvider::kInventoryNewItem);
}

TopMenu::~TopMenu() {
	delete _exitButton;
	delete _inventoryButton;
	delete _optionsButton;
}

void TopMenu::onGameLoop() {
	_widgetsVisible = (isMouseInside() && StarkUserInterface->isInteractive()) || isAnimationPlaying();

	if (!_widgetsVisible) {
		return;
	}

	if (StarkDiary->hasUnreadEntries()) {
		_optionsButton->setUIElement(StaticProvider::kDiaryTabbed);
	} else {
		_optionsButton->setUIElement(StaticProvider::kDiaryNormal);
	}

	updateAnimations();
}

void TopMenu::onRender() {
	if (!_widgetsVisible) {
		return;
	}

	_inventoryButton->render();
	_optionsButton->render();
	_exitButton->render();
}

bool TopMenu::isAnimationPlaying() const {
	return _newInventoryItemExplosionAnimTimeRemaining > 0
	       || _newDiaryEntryAnimTimeRemaining > 0
	       || _newInventoryItemChestClosingAnimTimeRemaining > 0;
}

void TopMenu::updateAnimations() {
	if (_newInventoryItemExplosionAnimTimeRemaining > 0) {
		_newInventoryItemExplosionAnimTimeRemaining -= StarkGlobal->getMillisecondsPerGameloop();

		if (_newInventoryItemExplosionAnimTimeRemaining <= 0) {
			_inventoryButton->stopImageExplosion();

			_newInventoryItemChestClosingAnimTimeRemaining = 20 * 33; // 20 frames at 30 fps
			_inventoryButton->goToAnimStatement(12);
		}
	}

	if (_newInventoryItemChestClosingAnimTimeRemaining > 0) {
		_newInventoryItemChestClosingAnimTimeRemaining -= StarkGlobal->getMillisecondsPerGameloop();
	}

	if (_newDiaryEntryAnimTimeRemaining > 0) {
		_newDiaryEntryAnimTimeRemaining -= StarkGlobal->getMillisecondsPerGameloop();
		if (_newDiaryEntryAnimTimeRemaining <= 0) {
			_optionsButton->stopImageFlashing();
		}
	}
}

void TopMenu::onMouseMove(const Common::Point &pos) {
	if (_widgetsVisible && StarkUserInterface->isInteractive()) {
		Button *hoveredButton = getButtonAtPosition(pos);
		if (hoveredButton) {
			_cursor->setCursorType(Cursor::kActive);
			hoveredButton->showButtonHint();
		} else {
			_cursor->setCursorType(Cursor::kDefault);
		}
	} else {
		_cursor->setCursorType(Cursor::kPassive);
	}
}

void TopMenu::onClick(const Common::Point &pos) {
	if (!_widgetsVisible || !StarkUserInterface->isInteractive()) {
		return;
	}

	if (_exitButton->containsPoint(pos)) {
		StarkUserInterface->confirm(GameMessage::kQuitGamePrompt, StarkUserInterface,
		                            &UserInterface::requestQuitToMainMenu);
	}

	if (_inventoryButton->containsPoint(pos)) {
		StarkUserInterface->inventoryOpen(true);
	}

	if (_optionsButton->containsPoint(pos)) {
		StarkUserInterface->optionsOpen();
	}
}

Button *TopMenu::getButtonAtPosition(const Common::Point &point) const {
	if (_exitButton->containsPoint(point)) {
		return _exitButton;
	} else if (_optionsButton->containsPoint(point)) {
		return _optionsButton;
	} else if (_inventoryButton->containsPoint(point)) {
		return _inventoryButton;
	}

	return nullptr;
}

void TopMenu::onScreenChanged() {
	_exitButton->resetHintVisual();
	_inventoryButton->resetHintVisual();
	_optionsButton->resetHintVisual();
}

void TopMenu::notifyInventoryItemEnabled(uint16 itemIndex) {
	_newInventoryItemExplosionAnimTimeRemaining = 128 * 33; // 128 frames at 30 fps
	_inventoryButton->goToAnimStatement(2);

	Visual *inventoryItemImage = StarkGlobal->getInventory()->getInventoryItemVisual(itemIndex);
	_inventoryButton->startImageExplosion(inventoryItemImage->get<VisualImageXMG>());

	assert(_inventoryNewItemSound);
	_inventoryNewItemSound->stop();
	_inventoryNewItemSound->play();
}

void TopMenu::notifyDiaryEntryEnabled() {
	if (StarkDiary->isEnabled()) {
		_newDiaryEntryAnimTimeRemaining = 5000;
		VisualImageXMG *diaryImage = StarkStaticProvider->getUIElement(StaticProvider::kDiaryTabbed);
		_optionsButton->startImageFlashing(diaryImage);
	}
}

} // End of namespace Stark