"use strict";


import Agent from './agent/Agent.mjs';
import InfoBroker from './core/InfoBroker.mjs';

class SystemQuery {
	constructor(config) {
		this.config = config;
		this.info = new InfoBroker();
	}
	
	async init() {
		///
		// 1: Create agent
		///
		this.agent = new Agent(this.config);
		await this.agent.init();
		
		///
		// 2: Attach listeners
		///
		this.agent.on("message-query", this.handle_query.bind(this));
		this.agent.on("message-query-response", this.handle_query_response.bind(this));
	}
	
	async handle_query(peer, msg) {
		// 1: Validate input
		if(typeof msg.table !== "string"
			|| !this.info.is_valid_table(msg.table)) return;
		
		// 2: Fetch system info
		let table = await this.info.fetch_table(msg.table);
		if(table === null) return;
		
		// 3: Return to requester
		await peer.send("query-response", { result: table });
	}
	async handle_query_response(peer, msg) {
		
	}
}

SystemQuery.Create = async function(config) {
	let result = new SystemQuery(config);
	await result.init();
	return result;
}

export default SystemQuery;