/* 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/>.
 *
 */

#ifndef ZVISION_MENU_H
#define ZVISION_MENU_H

#include "common/array.h"
#include "common/bitarray.h"
#include "common/rect.h"
#include "graphics/surface.h"
#include "zvision/zvision.h"
#include "zvision/common/focus_list.h"
#include "zvision/common/scroller.h"
#include "zvision/scripting/script_manager.h"

namespace ZVision {

enum {
	kMainMenuSave = 0,
	kMainMenuLoad = 1,
	kMainMenuPrefs = 2,
	kMainMenuExit = 3,
	kItemsMenu = 4,
	kMagicMenu = 5
};

struct MenuParams {
	int16 wxButs[4][2];   // Widths & X positions of main menu buttons; {Save, Restore, Prefs, Quit}
	int16 wMain;  // Width of main menu background
	int8 idleFrame; // Frame to display of unselected main menu button
	int8 activeFrame; // Frame to display of selected main menu button when mouse is down
	int8 clickedFrame; // Frame to display of selected main menu button when mouse is down
	Common::Point activePos;  // Fully scrolled main menu position, relative to origin of menu area
	Common::Point idlePos;  // Fully retracted main menu position, relative to origin of menu area
	int16 period; // Duration of main menu scrolldown
	int16 triggerHeight;  // Height of menu trigger area when inactive
	int16 buttonPeriod; // Duration of main menu button animation
};

// NB - menu area is same width as working window.

static const MenuParams nemesisParams {
	{ {120, -1}, {144, 120}, {128, 264}, {120, 392} },
	512,
	-1,
	4,
	5,
	Common::Point(0, 0),
	Common::Point(0, -32),
	500,
	2,
	500
};

static const MenuParams zgiParams {
	{ {135, 50}, {135, 185}, {135, 320}, {135, 455} },
	580,
	0,
	1,
	1,
	Common::Point(30, 0),
	Common::Point(30, -20),
	250,
	32,
	0
};

class MenuManager {
public:
	MenuManager(ZVision *engine, const Common::Rect menuArea, const MenuParams params);
	virtual ~MenuManager();
	virtual void onMouseMove(const Common::Point &pos);
	virtual void onMouseDown(const Common::Point &pos);
	virtual void onMouseUp(const Common::Point &pos);
	virtual void process(uint32 deltaTimeInMillis);
	bool inMenu() const {
		return _prevInMenu;
	}
	virtual bool inMenu(const Common::Point &pos) const {
		return false;
	} // For widescreen mod; used to suspend panning, tilting & scripting triggers when the mouse is within the working window but also in the menu.

	void mainMouseDown(const Common::Point &pos); // Show clicked graphic under selected button
	bool mainMouseMove(const Common::Point &pos); // return true if selected button has changed

	void setEnable(uint16 flags);
	uint16 getEnable() const {
		return _menuBarFlag;
	}
	bool getEnable(uint8 flag) const {
		return _enableFlags.get(flag);
	}

protected:
	virtual void redrawAll() {}
	void redrawMain();
	int mouseOverMain(const Common::Point &pos);
	void setFocus(int8 currentFocus);

	bool _prevInMenu = false;
	bool _redraw = true;
	int _mouseOnItem = -1;
	static const uint8 _hMainMenu = 32;
	int8 _mainClicked = -1;

	ZVision *_engine;
	const MenuParams _params;
	uint16 _menuBarFlag;
	const Common::Rect _menuArea;
	const Common::Point _menuOrigin;
	const Common::Rect _menuTriggerArea;
	Graphics::Surface _mainBack;
	Graphics::Surface _mainButtons[4][6];
	Common::BitArray _enableFlags;
	Common::Rect _mainArea;
	Common::Rect _menuHotspots[4];
	int8 _mainFrames[4]; // Frame to display of each main menu button; first row is currently displayed, 2nd row is backbuffer for idle animations
	Scroller _mainScroller;
	FocusList<int8> _menuFocus;  // Order in which menus have most recently had focus; determines current mouse focus & order in which to redraw them.
	bool _clean = false; // Whether or not to blank
	LinearScroller *_buttonAnim[4];
};

class MenuZGI: public MenuManager {
public:
	MenuZGI(ZVision *engine, Common::Rect menuArea);
	~MenuZGI() override;
	void onMouseMove(const Common::Point &pos) override;  // NB Pos is in screen coordinates
	void onMouseUp(const Common::Point &pos) override;
	void process(uint32 deltaTimeInMillis) override;
	bool inMenu(const Common::Point &pos) const override;
private:
	void redrawAll() override;
	Graphics::Surface _menuBack[3];
	Graphics::Surface *_items[50][2];
	uint _itemId[50];

	Graphics::Surface *_magic[12][2];
	uint _magicId[12];
//  void redrawMain(bool hasFocus) override;
	void redrawItems();
	void redrawMagic();
	int mouseOverItem(const Common::Point &pos, int itemCount);
	int mouseOverMagic(const Common::Point &pos);

	static const uint16 _hSideMenu = 32;
	static const uint16 _wSideMenu = 600;
	static const uint16 _wSideMenuTab = 20;
	static const int16 _magicWidth = 47;

	const int16 _sideMenuPeriod = 300;

	Scroller _itemsScroller, _magicScroller;

	const Common::Point _magicOrigin;
	const Common::Point _itemsOrigin;

	Common::Rect _magicArea;
	Common::Rect _itemsArea;
};

class MenuNemesis: public MenuManager {
public:
	MenuNemesis(ZVision *engine, Common::Rect menuArea);
	~MenuNemesis() override;
	void onMouseMove(const Common::Point &pos) override;
	bool inMenu(const Common::Point &pos) const override;
private:
	void redrawAll() override;
};

} // End of namespace ZVision

#endif