/* 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 M4_GUI_CHEAPO_H
#define M4_GUI_CHEAPO_H

#include "common/str.h"
#include "m4/graphics/gr_buff.h"
#include "m4/m4_types.h"

namespace M4 {
namespace GUI {

constexpr int16 MAX_BUTTONS = 20;

enum ControlStatus {
	NOTHING, IN_CONTROL, OVER_CONTROL, SELECTED, TRACKING
};

enum ButtonState {
	BUTTON_0, BUTTON_RELAXED, BUTTON_OVER, BUTTON_PICKED
};

class RectClass;
class ButtonClass;
class InterfaceBox;

class RectClass {
public:
	int16 _x1 = 0, _x2 = 0, _y1 = 0, _y2 = 0;
public:
	RectClass();
	RectClass(int16 x1, int16 y1, int16 x2, int16 y2);
	RectClass(const RectClass *);
	virtual ~RectClass();
	virtual int16 inside(int16 x, int16 y) const;

	void copyInto(RectClass *r) const;

	void set(int16 x1, int16 y1, int16 x2, int16 y2);
	void set(const RectClass *r);
};

class TextField : public RectClass {
private:
	char *_string = nullptr;
	int16 _string_len = 0;
public:
	bool _must_redraw = false;

public:
	TextField(int16 x1, int16 y1, int16 x2, int16 y2);
	~TextField();

	void set_string(const char *string);
	void draw(GrBuff *interface_buffer);
};

class ButtonClass : public RectClass {
protected:
	int16 _tag = 0;
	int16 _unknown = 0;
	int16 _relaxed = 0;
	int16 _over = 0;
	int16 _picked = 0;
	int16 _tracking = 0;
	int32 _sprite = 0;
	bool _highlighted = false;
	bool _hidden = false;

	void init();
	void zap_resources();

public:
	ButtonState	_state = BUTTON_RELAXED;
	Common::String _name;
	bool _must_redraw = false;

public:
	ButtonClass();
	ButtonClass(const RectClass &r, const Common::String &btnName, int16 tag);
	ButtonClass(const RectClass &r, const Common::String &btnName, int16 tag,
		int16 unknown, int16 relaxed, int16 over, int16 picked, int sprite);
	ButtonClass(const RectClass &r, const Common::String &btnName, int16 tag,
		int16 relaxed, int16 over, int16 picked, int sprite);
	~ButtonClass();

	void draw(GrBuff *interface_buffer);
	int16 inside(int16 x, int16 y) const override;
	virtual ControlStatus track(int32 eventType, int16 x, int16 y);

	void set(const ButtonClass *b);
	void set(int16 x1, int16 y1, int16 x2, int16 y2, int16 tag);
	void set(int16 x1, int16 y1, int16 x2, int16 y2, int16 tag, int16 unknown,
		int16 relaxed, int16 over, int16 picked, int32 sprite);
	void set_name(const Common::String &btnName);

	int16 get_tag() const;

	void hide();
	void unhide();
	bool is_hidden() const;
	void set_sprite_relaxed(int16 r);
	void set_sprite_picked(int16 p);
	void set_sprite_over(int16 o);
	void set_sprite_unknown(int16 val);
};

class Toggler : public ButtonClass {
public:
	ControlStatus _toggle_state;
public:
	Toggler();
	ControlStatus track(int32 eventType, int16 x, int16 y);
};

class InterfaceBox : public RectClass {
private:
	bool _selected = false;
	int16 _index = 0;
	ButtonClass *_button[MAX_BUTTONS] = { nullptr };

public:
	int16 _highlight_index = 0;
	bool _must_redraw_all = false;

public:
	InterfaceBox(const RectClass &r);
	~InterfaceBox();

	void draw(GrBuff *interface_buffer);
	int16 inside(int16 x, int16 y) const override;
	ControlStatus track(int32 eventType, int16 x, int16 y);

	void add(ButtonClass *b);
	int16 check_inventory(int16 x, int16 y);
	void highlight_button(int16 index);
	void set_selected(bool);

};

} // namespace GUI
} // namespace M4

#endif