/**************************************************************************/
/*  navigation_mesh_generator.cpp                                         */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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/* Permission is hereby granted, free of charge, to any person obtaining  */
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/* "Software"), to deal in the Software without restriction, including    */
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/* included in all copies or substantial portions of the Software.        */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
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/**************************************************************************/

#include "navigation_mesh_generator.h"

#include "core/config/project_settings.h"

#include "scene/2d/navigation_geometry_parser_2d.h"
#include "scene/main/node.h"
#include "scene/resources/navigation/navigation_mesh.h"
#include "scene/resources/navigation_2d/navigation_mesh_source_geometry_data_2d.h"

NavigationMeshGenerator *NavigationMeshGenerator::singleton = nullptr;

void NavigationMeshGenerator::_bind_methods() {
	ClassDB::bind_method(D_METHOD("register_geometry_parser_2d", "geometry_parser"), &NavigationMeshGenerator::register_geometry_parser_2d);
	ClassDB::bind_method(D_METHOD("unregister_geometry_parser_2d", "geometry_parser"), &NavigationMeshGenerator::unregister_geometry_parser_2d);

	ClassDB::bind_method(D_METHOD("parse_2d_source_geometry_data", "navigation_polygon", "root_node", "callback"), &NavigationMeshGenerator::parse_2d_source_geometry_data, DEFVAL(Ref<FuncRef>()));
	ClassDB::bind_method(D_METHOD("bake_2d_from_source_geometry_data", "navigation_polygon", "source_geometry_data", "callback"), &NavigationMeshGenerator::bake_2d_from_source_geometry_data, DEFVAL(Ref<FuncRef>()));
	ClassDB::bind_method(D_METHOD("parse_and_bake_2d", "navigation_polygon", "root_node", "callback"), &NavigationMeshGenerator::parse_and_bake_2d, DEFVAL(Ref<FuncRef>()));

	ClassDB::bind_method(D_METHOD("is_navigation_polygon_baking", "navigation_polygon"), &NavigationMeshGenerator::is_navigation_polygon_baking);
}

NavigationMeshGenerator *NavigationMeshGenerator::get_singleton() {
	return singleton;
}

void NavigationMeshGenerator::init() {
}

void NavigationMeshGenerator::finish() {
}

NavigationMeshGenerator::NavigationMeshGenerator() {
	ERR_FAIL_COND(singleton != nullptr);
	singleton = this;
}

NavigationMeshGenerator::~NavigationMeshGenerator() {
	singleton = nullptr;
}

/// NavigationMeshGeneratorManager ////////////////////////////////////////////////////

NavigationMeshGeneratorManager *NavigationMeshGeneratorManager::singleton = nullptr;
const String NavigationMeshGeneratorManager::setting_property_name("navigation/baking/generator/navigation_mesh_generator");

void NavigationMeshGeneratorManager::on_servers_changed() {
	String nav_server_names("DEFAULT");

	for (int i = 0; i < navigation_mesh_generators.size(); ++i) {
		const ClassInfo &server = navigation_mesh_generators[i];
		nav_server_names += "," + server.name;
	}

	ProjectSettings::get_singleton()->set_custom_property_info(setting_property_name, PropertyInfo(Variant::STRING, setting_property_name, PROPERTY_HINT_ENUM, nav_server_names));
}

void NavigationMeshGeneratorManager::_bind_methods() {
	//ClassDB::bind_method(D_METHOD("register_server", "name", "create_callback"), &NavigationMeshGeneratorManager::register_server);
	//ClassDB::bind_method(D_METHOD("set_default_server", "name", "priority"), &NavigationMeshGeneratorManager::set_default_server);
}

NavigationMeshGeneratorManager *NavigationMeshGeneratorManager::get_singleton() {
	return singleton;
}

void NavigationMeshGeneratorManager::register_server(const String &p_name, CreateNavigationMeshGeneratorCallback p_create_callback) {
	ERR_FAIL_COND(!p_create_callback);
	ERR_FAIL_COND_MSG(find_server_id(p_name) != -1, "NavigationMeshGenerator with the same name was already registered.");

	navigation_mesh_generators.push_back(ClassInfo{ p_name, p_create_callback });
	on_servers_changed();
}

void NavigationMeshGeneratorManager::set_default_server(const String &p_name, int p_priority) {
	const int id = find_server_id(p_name);
	ERR_FAIL_COND_MSG(id == -1, "NavigationMeshGenerator not found"); // Not found

	// Only change the server if it is registered with a higher priority
	if (default_server_priority < p_priority) {
		default_server_id = id;
		default_server_priority = p_priority;
	}
}

int NavigationMeshGeneratorManager::find_server_id(const String &p_name) const {
	for (int i = 0; i < navigation_mesh_generators.size(); ++i) {
		if (p_name == navigation_mesh_generators[i].name) {
			return i;
		}
	}

	return -1;
}

NavigationMeshGenerator *NavigationMeshGeneratorManager::new_default_server() const {
	ERR_FAIL_COND_V(default_server_id == -1, nullptr);

	NavigationMeshGenerator *gen = navigation_mesh_generators[default_server_id].create_callback();

	ERR_FAIL_COND_V(!gen, nullptr);

	return gen;
}

NavigationMeshGenerator *NavigationMeshGeneratorManager::new_server(const String &p_name) const {
	const int id = find_server_id(p_name);

	if (id == -1) {
		return nullptr;
	}

	NavigationMeshGenerator *gen = navigation_mesh_generators[id].create_callback();

	ERR_FAIL_COND_V(!gen, nullptr);

	return gen;
}

NavigationMeshGeneratorManager::NavigationMeshGeneratorManager() {
	singleton = this;

	GLOBAL_DEF("navigation/baking/thread_model/use_thread_pool", true);
}

NavigationMeshGeneratorManager::~NavigationMeshGeneratorManager() {
	singleton = nullptr;
}
