import ApplicationComponent from "../ApplicationComponent";
import onFinished from "on-finished";
import Logger from "../Logger";
import {Express, Request, Response, Router} from "express";

export default class LogRequestsComponent extends ApplicationComponent<void> {
    private static fullRequests: boolean = false;

    public static logFullHttpRequests() {
        this.fullRequests = true;
        Logger.info('Http requests will be logged with more details.');
    }

    public static logRequest(req: Request, res: Response, err: any = null, additionalStr: string = '', silent: boolean = false): string {
        if (!LogRequestsComponent.fullRequests) {
            let logStr = `${req.method} ${req.originalUrl} - ${res.statusCode}`;
            if (err) {
                if (silent) {
                    logStr += ` ${err.errorCode} ${err.name}`;
                    return Logger.silentError(err, logStr);
                } else {
                    return Logger.error(err, logStr, additionalStr, err);
                }
            } else {
                Logger.info(logStr);
            }
        } else {
            const requestObj = JSON.stringify({
                ip: req.ip,
                host: req.hostname,
                method: req.method,
                url: req.originalUrl,
                headers: req.headers,
                query: req.query,
                params: req.params,
                body: req.body,
                files: req.files,
                cookies: req.cookies,
                sessionId: req.sessionID,
                result: {
                    code: res.statusCode
                }
            }, null, 4);
            if (err) {
                return Logger.error(err, requestObj, err);
            } else {
                Logger.info(requestObj);
            }
        }

        return '';
    }

    public async start(app: Express, router: Router): Promise<void> {
        router.use((req, res, next) => {
            onFinished(res, (err) => {
                if (!err) {
                    LogRequestsComponent.logRequest(req, res);
                }
            });
            next();
        });
    }

    public async stop(): Promise<void> {
    }

}