import { loadEnvironment } from "./env-loader";

const DEFAULT_MONGO_SERVER = "localhost";
const DEFAULT_MONGO_PORT = 27017;
const DEFAULT_MONGO_DB = "reacttrainingdb";
const DEVELOPER_ENVIRONMENT = "dev";
const DEFAULT_PORT_NUMBER = 8080;

class Configuration {
    public static getConfiguration() {
        const environment = process.env.ENVIRONMENT || DEVELOPER_ENVIRONMENT;
       
        loadEnvironment(environment);

        let connectionString = process.env.MONGO_CONNECTION_STRING;

        if (!connectionString) {
            const mongoServer = process.env.MONGO_SERVER || DEFAULT_MONGO_SERVER;
            const mongoPort = process.env.MONGO_PORT || DEFAULT_MONGO_PORT;
            const mongoDbName = process.env.MONGO_DB || DEFAULT_MONGO_DB;

            connectionString = `mongodb://${mongoServer}:${mongoPort}/${mongoDbName}`;
        }

        const portNumber = parseInt(process.env.LISTENER_PORT || "") || DEFAULT_PORT_NUMBER;
        const enableHttps = (process.env.ENABLE_HTTPS || "") === "true";
        const certFile = process.env.CERT_FILE;
        const keyFile = process.env.KEY_FILE;
        const passphrase = process.env.PASS_PHRASE || "";

        const settings = {
            getConnectionString: () => connectionString,
            environment,
            certificateDetails: {
                certFile,
                keyFile,
                passphrase
            },
            portNumber,
            enableHttps
        };

        return settings;
    }
}

export {
    Configuration
};