/**************************************************************************/
/*  base_button.h                                                         */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#ifndef BASE_BUTTON_H
#define BASE_BUTTON_H

#include "core/input/shortcut.h"
#include "scene/gui/control.h"

class ButtonGroup;

class BaseButton : public Control {
	GDCLASS(BaseButton, Control);

public:
	enum ActionMode {
		ACTION_MODE_BUTTON_PRESS,
		ACTION_MODE_BUTTON_RELEASE,
	};

private:
	BitField<MouseButtonMask> button_mask = MouseButtonMask::LEFT;
	bool toggle_mode = false;
	bool shortcut_in_tooltip = true;
	bool was_mouse_pressed = false;
	bool keep_pressed_outside = false;
	bool shortcut_feedback = true;
	Ref<Shortcut> shortcut;
	ObjectID shortcut_context;

	ActionMode action_mode = ACTION_MODE_BUTTON_RELEASE;
	struct Status {
		bool pressed = false;
		bool hovering = false;
		bool press_attempt = false;
		bool pressing_inside = false;

		bool disabled = false;

	} status;

	Ref<ButtonGroup> button_group;

	void _unpress_group();
	void _pressed();
	void _toggled(bool p_pressed);

	void on_action_event(Ref<InputEvent> p_event);

	Timer *shortcut_feedback_timer = nullptr;
	bool in_shortcut_feedback = false;
	void _shortcut_feedback_timeout();

protected:
	virtual void pressed();
	virtual void toggled(bool p_pressed);
	static void _bind_methods();
	virtual void gui_input(const Ref<InputEvent> &p_event) override;
	virtual void shortcut_input(const Ref<InputEvent> &p_event) override;
	void _notification(int p_what);

	bool _was_pressed_by_mouse() const;

	GDVIRTUAL0(_pressed)
	GDVIRTUAL1(_toggled, bool)

public:
	enum DrawMode {
		DRAW_NORMAL,
		DRAW_PRESSED,
		DRAW_HOVER,
		DRAW_DISABLED,
		DRAW_HOVER_PRESSED,
	};

	DrawMode get_draw_mode() const;

	/* Signals */

	bool is_pressed() const; ///< return whether button is pressed (toggled in)
	bool is_pressing() const; ///< return whether button is pressed (toggled in)
	bool is_hovered() const;

	void set_pressed(bool p_pressed); // Only works in toggle mode.
	void set_pressed_no_signal(bool p_pressed);
	void set_toggle_mode(bool p_on);
	bool is_toggle_mode() const;

	void set_shortcut_in_tooltip(bool p_on);
	bool is_shortcut_in_tooltip_enabled() const;

	void set_disabled(bool p_disabled);
	bool is_disabled() const;

	void set_action_mode(ActionMode p_mode);
	ActionMode get_action_mode() const;

	void set_keep_pressed_outside(bool p_on);
	bool is_keep_pressed_outside() const;

	void set_shortcut_feedback(bool p_enable);
	bool is_shortcut_feedback() const;

	void set_button_mask(BitField<MouseButtonMask> p_mask);
	BitField<MouseButtonMask> get_button_mask() const;

	void set_shortcut(const Ref<Shortcut> &p_shortcut);
	Ref<Shortcut> get_shortcut() const;

	virtual String get_tooltip(const Point2 &p_pos) const override;

	void set_button_group(const Ref<ButtonGroup> &p_group);
	Ref<ButtonGroup> get_button_group() const;

	Array get_configuration_warnings() const override;

	BaseButton();
	~BaseButton();
};

VARIANT_ENUM_CAST(BaseButton::DrawMode)
VARIANT_ENUM_CAST(BaseButton::ActionMode)

class ButtonGroup : public Resource {
	GDCLASS(ButtonGroup, Resource);
	friend class BaseButton;
	HashSet<BaseButton *> buttons;
	bool allow_unpress = false;

protected:
	static void _bind_methods();

public:
	BaseButton *get_pressed_button();
	void get_buttons(List<BaseButton *> *r_buttons);
	TypedArray<BaseButton> _get_buttons();
	void set_allow_unpress(bool p_enabled);
	bool is_allow_unpress();
	ButtonGroup();
};

#endif // BASE_BUTTON_H