import { loggerManager } from "@logger";
import { Router, Response, NextFunction, Request } from "express";
import PromiseRouter from "express-promise-router";
import { WebhookController } from "@server/controllers/webhook.controller";
import { Gauge, Registry } from "prom-client";

export class WebhookRouter {
	readonly router: Router;
	private registry: Registry;
	private gauge: Gauge<string>;
	public num:number=0;
	constructor(private readonly webhookController: WebhookController) {
		this.registry = new Registry();
		this.gauge = new Gauge({ name: "received_webhook_counter" + this.num++, help: "When receiving a webhook inc 1" });
		this.router = PromiseRouter();
		this.setupPrometheus();
		this.setupRouters();
	}

	private setupRouters() {
		this.router.get("/metrics", this.sendPrometheusMatrices.bind(this));
		this.router.post("/webhook", this.incGauge.bind(this), (req, res) => this.webhookController.insert(req, res));
	}

	private setupPrometheus() {
		this.registry.registerMetric(this.gauge);

	}

	private async sendPrometheusMatrices(_req: Request, res: Response, _next: NextFunction) {
		res.setHeader("Content-Type", this.registry.contentType);
		res.send(await this.registry.metrics());
		this.gauge.reset();
	}
	public remove(){
		this.registry.clear();

	}

	private async incGauge(_request: Request, _response: Response, next: NextFunction) {
		this.gauge.inc();
		next();
	}
}