import {EventEmitter} from 'events';
import {GraphManager, type GraphNodeEventMapping, type IGraphBaseEntityNode, type IGraphEventEntityNode} from '.';

export const GraphTypeEnum = {
    NodeJS: 0,
    Express: 10,
    ExpressRouter: 11,
    MognoDB: 20,
    Redis: 30,
} as const;

const manager = new GraphManager<ExpressJs | NodeJsNode>();

type NodeJsNode = IGraphBaseEntityNode<typeof GraphTypeEnum.NodeJS, {version: string}>;
export const rootNodejsGraphNode: NodeJsNode = {
    nodeType: GraphTypeEnum.NodeJS,
    getNodeId: () => 'nodejs',
    getNodeProps: () => ({version: process.versions.node}),
};
manager.addNode(rootNodejsGraphNode); // add nodejs node to manager

export class ExpressJs
    extends EventEmitter<GraphNodeEventMapping>
    implements IGraphEventEntityNode<typeof GraphTypeEnum.Express, {port: string | number | undefined; status?: 'running' | 'stopped'}>
{
    public nodeType = GraphTypeEnum.Express;
    public getNodeId = () => 'express';
    private port: string;
    private status: 'running' | 'stopped' = 'stopped';
    public constructor(port: string) {
        super();
        this.port = port;
        manager.addEdge(rootNodejsGraphNode, this); // here constructor work easy way to add edge to nodejs root node
        // after start server, set status to running and notify with this.emit('nodeUpdated') event
    }
    public getNodeProps() {
        return {
            port: this.port,
            status: this.status,
        };
    }
}

// hook to manager events and output the node hierarchy structure
manager.on('graphUpdate', async (node) => {
    console.log(await manager.getNodeStructure(node));
});