/**
 * Graph of nodes, implements node-based programming pattern
 * Notable contemporary examples include:
 *  * SideFX Houdini
 *  * Blender - geometry nodes, shaders
 *  * Unreal Engine - blueprints
 *  * Grasshopper
 * @see https://en.wikipedia.org/wiki/Node_graph_architecture
 */
export class NodeGraph {
    /**
     * @private
     * @readonly
     * @type {List<NodeInstance>}
     */
    private readonly nodes;
    /**
     * Flat hierarchy of all connections between nodes
     * @private
     * @readonly
     * @type {List<Connection>}
     */
    private readonly connections;
    /**
     *
     * @type {IdPool}
     * @readonly
     * @private
     */
    private readonly __idpNodes;
    /**
     *
     * @type {IdPool}
     * @readonly
     * @private
     */
    private readonly __idpConnections;
    /**
     * Gets incremented every time structure of the graph changes, meaning nodes or connections are added/removed
     * Unsigned integer value
     * @readonly
     * @return {number}
     */
    readonly get version(): number;
    /**
     * @readonly
     */
    readonly on: {
        /**
         * @readonly
         * @type {Signal<NodeInstance,number>}
         */
        readonly nodeAdded: Signal<NodeInstance<import("./node/NodeDescription.js").NodeDescription>, number>;
        /**
         * @readonly
         * @type {Signal<NodeInstance,number>}
         */
        readonly nodeRemoved: Signal<NodeInstance<import("./node/NodeDescription.js").NodeDescription>, number>;
        /**
         * @readonly
         * @type {Signal<Connection,number>}
         */
        readonly connectionAdded: Signal<Connection, number>;
        /**
         * @readonly
         * @type {Signal<Connection,number>}
         */
        readonly connectionRemoved: Signal<Connection, number>;
    };
    /**
     * Clear out all data from the graph
     */
    reset(): void;
    /**
     * Perform a deep copy
     * @param {NodeGraph} other
     */
    copy(other: NodeGraph): void;
    /**
     *
     * @returns {NodeGraph}
     */
    clone(): NodeGraph;
    /**
     * Merge another graph into this one
     * Supplied graph does not change as a result
     * @see {@link #mergeFragment}
     * @param {NodeGraph} other
     * @returns {{connections:Connection[], nodes:NodeInstance[]}}
     */
    merge(other: NodeGraph): {
        connections: Connection[];
        nodes: NodeInstance[];
    };
    /**
     * Merge foreign nodes and associated connections into this graph
     * New node instances and connections will be created to reflect these inside this graph
     * NOTE: parameters on merged nodes are shallow copies
     * NOTE: if IDs are available - copied nodes will have the same IDs as the originals
     * @param {NodeInstance[]} nodes
     * @param {Connection[]} [connections]
     * @returns {{connections:Connection[], nodes:NodeInstance[]}} local created instances
     */
    mergeFragment({ nodes, connections }: NodeInstance[]): {
        connections: Connection[];
        nodes: NodeInstance[];
    };
    /**
     *
     * @param {function(NodeInstance):*} visitor
     * @param [thisArg]
     */
    traverseNodes(visitor: (arg0: NodeInstance) => any, thisArg?: any): void;
    /**
     *
     * @param {function(Connection):*} visitor
     * @param [thisArg]
     */
    traverseConnections(visitor: (arg0: Connection) => any, thisArg?: any): void;
    /**
     * Returns an array of all node instances
     * NOTE: this array is a copy
     * @return {NodeInstance[]}
     */
    getNodes(): NodeInstance[];
    /**
     * Returns an array of all connections
     * NOTE: this array is a copy
     * @return {Connection[]}
     */
    getConnections(): Connection[];
    /**
     *
     * @param {NodeInstance} node
     * @returns {boolean}
     */
    hasNode(node: NodeInstance): boolean;
    /**
     *
     * @param {NodeDescription} description
     * @returns {NodeInstance[]}
     */
    getNodesByDescription(description: NodeDescription): NodeInstance[];
    /**
     *
     * @param {Type<NodeDescription>} Klass
     * @returns {NodeInstance[]}
     */
    getNodesByDescriptionClass(Klass: Type<NodeDescription>): NodeInstance[];
    /**
     *
     * @param {number} id
     * @returns {NodeInstance|undefined}
     */
    getNode(id: number): NodeInstance | undefined;
    /**
     * Same as getNode but throw exception when node doesn't exist
     * @param {number} id
     * @returns {NodeInstance}
     * @throws if node doesn't exist
     */
    getNodeSafe(id: number): NodeInstance;
    /**
     *
     * @param {number} id
     * @returns {Connection|undefined}
     */
    getConnection(id: number): Connection | undefined;
    /**
     *
     * @param {number} node_id
     * @param {number} port_id
     * @returns {NodeInstancePortReference|undefined}
     */
    getConnectionEndpoint(node_id: number, port_id: number): NodeInstancePortReference | undefined;
    /**
     *
     * @param {NodeDescription} node
     * @returns {number} ID of the new node
     */
    createNode(node: NodeDescription): number;
    /**
     *
     * @param {NodeInstance} node
     */
    addNode(node: NodeInstance): void;
    /**
     *
     * @param {number} id
     * @returns {boolean} True if deleted, false if node was not found
     */
    deleteNode(id: number): boolean;
    /**
     * Utility method to help in creation of connections
     * Same as {@link #createConnection}, but ports are identified by their named instead
     * @param {number} sourceNode
     * @param {string} sourcePort
     * @param {number} targetNode
     * @param {string} targetPort
     * @returns {number} connection ID
     */
    createConnectionByPortName(sourceNode: number, sourcePort: string, targetNode: number, targetPort: string): number;
    /**
     *
     * @param {number} sourceNode
     * @param {number} sourcePort
     * @param {number} targetNode
     * @param {number} targetPort
     * @returns {number} ID of created or already existing connection
     * @throws if any node or port are not found
     */
    createConnection(sourceNode: number, sourcePort: number, targetNode: number, targetPort: number): number;
    /**
     *
     * @param {number} id
     * @returns {boolean} True if deleted, false if connection was not found
     */
    deleteConnection(id: number): boolean;
    /**
     *
     * @param {number} id
     * @param {number[]} result IDs of attached connections
     * @returns {number} number of found connections
     */
    getConnectionsAttachedToNode(id: number, result: number[]): number;
    toString(): string;
    /**
     * Useful for type checks
     * @example
     *      if(graph.isNodeGraph === true){
     *          // yep, that's a NodeGraph alright!
     *      }
     * @readonly
     * @type {boolean}
     */
    readonly isNodeGraph: boolean;
    #private;
}
import { NodeInstance } from "./node/NodeInstance.js";
import { Connection } from "./Connection.js";
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