/*************************************************************************/
/*  editor_profiler.h                                                    */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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/* "Software"), to deal in the Software without restriction, including   */
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/* distribute, sublicense, and/or sell copies of the Software, and to    */
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/*************************************************************************/

#ifndef EDITOR_PROFILER_H
#define EDITOR_PROFILER_H

#include "scene/gui/box_container.h"
#include "scene/gui/button.h"
#include "scene/gui/label.h"
#include "scene/gui/option_button.h"
#include "scene/gui/spin_box.h"
#include "scene/gui/split_container.h"
#include "scene/gui/texture_rect.h"
#include "scene/gui/tree.h"

class EditorProfiler : public VBoxContainer {
	GDCLASS(EditorProfiler, VBoxContainer);

public:
	struct Metric {
		bool valid = false;

		int frame_number = 0;
		float frame_time = 0;
		float process_time = 0;
		float physics_time = 0;
		float physics_frame_time = 0;

		struct Category {
			StringName signature;
			String name;
			float total_time = 0; //total for category

			struct Item {
				StringName signature;
				String name;
				String script;
				int line = 0;
				float self = 0;
				float total = 0;
				int calls = 0;
			};

			Vector<Item> items;
		};

		Vector<Category> categories;

		HashMap<StringName, Category *> category_ptrs;
		HashMap<StringName, Category::Item *> item_ptrs;
	};

	enum DisplayMode {
		DISPLAY_FRAME_TIME,
		DISPLAY_AVERAGE_TIME,
		DISPLAY_FRAME_PERCENT,
		DISPLAY_PHYSICS_FRAME_PERCENT,
	};

	enum DisplayTime {
		DISPLAY_TOTAL_TIME,
		DISPLAY_SELF_TIME,
	};

private:
	Button *activate = nullptr;
	Button *clear_button = nullptr;
	TextureRect *graph = nullptr;
	Ref<ImageTexture> graph_texture;
	Vector<uint8_t> graph_image;
	Tree *variables = nullptr;
	HSplitContainer *h_split = nullptr;

	HashSet<StringName> plot_sigs;

	OptionButton *display_mode = nullptr;
	OptionButton *display_time = nullptr;

	SpinBox *cursor_metric_edit = nullptr;

	Vector<Metric> frame_metrics;
	int total_metrics = 0;
	int last_metric = -1;

	int max_functions = 0;

	bool updating_frame = false;

	int hover_metric = -1;

	float graph_height = 1.0f;

	bool seeking = false;

	Timer *frame_delay = nullptr;
	Timer *plot_delay = nullptr;

	void _update_button_text();
	void _update_frame();

	void _activate_pressed();
	void _clear_pressed();

	String _get_time_as_text(const Metric &m, float p_time, int p_calls);

	void _make_metric_ptrs(Metric &m);
	void _item_edited();

	void _update_plot();

	void _graph_tex_mouse_exit();

	void _graph_tex_draw();
	void _graph_tex_input(const Ref<InputEvent> &p_ev);

	Color _get_color_from_signature(const StringName &p_signature) const;

	void _cursor_metric_changed(double);

	void _combo_changed(int);

	Metric _get_frame_metric(int index);

protected:
	void _notification(int p_what);
	static void _bind_methods();

public:
	void add_frame_metric(const Metric &p_metric, bool p_final = false);
	void set_enabled(bool p_enable, bool p_clear = true);
	void set_pressed(bool p_pressed);
	bool is_profiling();
	bool is_seeking() { return seeking; }
	void disable_seeking();

	void clear();

	Vector<Vector<String>> get_data_as_csv() const;

	EditorProfiler();
};

#endif // EDITOR_PROFILER_H