require('dotenv').config();
const swaggerStats = require('swagger-stats');
const express = require('express');
const packageJson = require("../../package.json");

class Analytics {
    static instance;
    constructor() {
        if (!Analytics.instance) {
            this.app = express();

            this.middleware = swaggerStats.getMiddleware({
                name: packageJson.name,
                version: packageJson.version,
                timelineBucketDuration: 60000,
                uriPath: '/stats/ui',
                authentication: true,
                onAuthenticate: (req, username, password) => {
                  return username === process.env.METRICS_USER
                      && password === process.env.METRICS_PASSWORD
                },
                swaggerSpec: {
                    info: {
                        title: 'TMDB Addon API',
                        version: packageJson.version
                    }
                }
            });
            this.app.use(this.middleware);
            
            Analytics.instance = this;
        }
        return Analytics.instance;
    }
}

module.exports = new Analytics();