/**************************************************************************/
/*  particle_process_material_editor_plugin.h                             */
/**************************************************************************/
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/*                             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 PARTICLE_PROCESS_MATERIAL_EDITOR_PLUGIN_H
#define PARTICLE_PROCESS_MATERIAL_EDITOR_PLUGIN_H

#include "editor/editor_plugin.h"
#include "editor/editor_properties.h"

class Button;
class EditorSpinSlider;
class Label;
class ParticleProcessMaterial;
class Range;
class VBoxContainer;

class ParticleProcessMaterialMinMaxPropertyEditor : public EditorProperty {
	GDCLASS(ParticleProcessMaterialMinMaxPropertyEditor, EditorProperty);

	enum class Hover {
		NONE,
		LEFT,
		RIGHT,
		MIDDLE,
	};

	enum class Drag {
		NONE,
		LEFT,
		RIGHT,
		MIDDLE,
		SCALE,
	};

	enum class Mode {
		RANGE,
		MIDPOINT,
	};

	Ref<Texture2D> range_slider_left_icon;
	Ref<Texture2D> range_slider_right_icon;

	Color background_color;
	Color normal_color;
	Color hovered_color;
	Color drag_color;
	Color midpoint_color;

	Control *range_edit_widget = nullptr;
	Button *toggle_mode_button = nullptr;
	Range *min_range = nullptr;
	Range *max_range = nullptr;

	EditorSpinSlider *min_edit = nullptr;
	EditorSpinSlider *max_edit = nullptr;

	Vector2 edit_size;
	Vector2 margin;
	Vector2 usable_area;

	Vector2 property_range;

	bool mouse_inside = false;
	Hover hover = Hover::NONE;

	Drag drag = Drag::NONE;
	float drag_from_value = 0.0;
	float drag_midpoint = 0.0;
	float drag_origin = 0.0;

	Mode slider_mode = Mode::RANGE;

	void _update_sizing();
	void _range_edit_draw();
	void _range_edit_gui_input(const Ref<InputEvent> &p_event);
	void _set_mouse_inside(bool p_inside);

	float _get_min_ratio() const;
	float _get_max_ratio() const;
	float _get_left_offset() const;
	float _get_right_offset() const;
	Rect2 _get_middle_rect() const;

	void _set_clamped_values(float p_min, float p_max);
	void _sync_property();

	void _update_mode();
	void _toggle_mode(bool p_edit_mode);
	void _update_slider_values();
	void _sync_sliders(float, const EditorSpinSlider *p_changed_slider);
	float _get_max_spread() const;

protected:
	void _notification(int p_what);

public:
	void setup(float p_min, float p_max, float p_step, bool p_allow_less, bool p_allow_greater, bool p_degrees);
	virtual void update_property() override;

	ParticleProcessMaterialMinMaxPropertyEditor();
};

class EditorInspectorParticleProcessMaterialPlugin : public EditorInspectorPlugin {
	GDCLASS(EditorInspectorParticleProcessMaterialPlugin, EditorInspectorPlugin);

public:
	virtual bool can_handle(Object *p_object) override;
	virtual bool parse_property(Object *p_object, const Variant::Type p_type, const String &p_path, const PropertyHint p_hint, const String &p_hint_text, const BitField<PropertyUsageFlags> p_usage, const bool p_wide = false) override;
};

#endif // PARTICLE_PROCESS_MATERIAL_EDITOR_PLUGIN_H