/*************************************************************************/
/*  performance.h                                                        */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
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/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
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/*************************************************************************/

#ifndef PERFORMANCE_H
#define PERFORMANCE_H

#include "core/object/class_db.h"
#include "core/templates/ordered_hash_map.h"

#define PERF_WARN_OFFLINE_FUNCTION
#define PERF_WARN_PROCESS_SYNC

class Performance : public Object {
	GDCLASS(Performance, Object);

	static Performance *singleton;
	static void _bind_methods();

	int _get_node_count() const;

	double _process_time;
	double _physics_process_time;

	class MonitorCall {
		Callable _callable;
		Vector<Variant> _arguments;

	public:
		MonitorCall(Callable p_callable, Vector<Variant> p_arguments);
		MonitorCall();
		Variant call(bool &r_error, String &r_error_message);
	};

	OrderedHashMap<StringName, MonitorCall> _monitor_map;
	uint64_t _monitor_modification_time;

public:
	enum Monitor {
		TIME_FPS,
		TIME_PROCESS,
		TIME_PHYSICS_PROCESS,
		MEMORY_STATIC,
		MEMORY_STATIC_MAX,
		MEMORY_MESSAGE_BUFFER_MAX,
		OBJECT_COUNT,
		OBJECT_RESOURCE_COUNT,
		OBJECT_NODE_COUNT,
		OBJECT_ORPHAN_NODE_COUNT,
		RENDER_TOTAL_OBJECTS_IN_FRAME,
		RENDER_TOTAL_PRIMITIVES_IN_FRAME,
		RENDER_TOTAL_DRAW_CALLS_IN_FRAME,
		RENDER_VIDEO_MEM_USED,
		RENDER_TEXTURE_MEM_USED,
		RENDER_BUFFER_MEM_USED,
		PHYSICS_2D_ACTIVE_OBJECTS,
		PHYSICS_2D_COLLISION_PAIRS,
		PHYSICS_2D_ISLAND_COUNT,
		PHYSICS_3D_ACTIVE_OBJECTS,
		PHYSICS_3D_COLLISION_PAIRS,
		PHYSICS_3D_ISLAND_COUNT,
		//physics
		AUDIO_OUTPUT_LATENCY,
		MONITOR_MAX
	};

	enum MonitorType {
		MONITOR_TYPE_QUANTITY,
		MONITOR_TYPE_MEMORY,
		MONITOR_TYPE_TIME
	};

	double get_monitor(Monitor p_monitor) const;
	String get_monitor_name(Monitor p_monitor) const;

	MonitorType get_monitor_type(Monitor p_monitor) const;

	void set_process_time(double p_pt);
	void set_physics_process_time(double p_pt);

	void add_custom_monitor(const StringName &p_id, const Callable &p_callable, const Vector<Variant> &p_args);
	void remove_custom_monitor(const StringName &p_id);
	bool has_custom_monitor(const StringName &p_id);
	Variant get_custom_monitor(const StringName &p_id);
	Array get_custom_monitor_names();

	uint64_t get_monitor_modification_time();

	static Performance *get_singleton() { return singleton; }

	Performance();
};

VARIANT_ENUM_CAST(Performance::Monitor);

#endif // PERFORMANCE_H