import * as moment from 'moment'
import * as config from './config'
import * as nodemailer from 'nodemailer'


enum Level {
    All,
    NoDebug,
    NoDebugNoInfo,
    NoDebugNoInfoNoWarning
}

var level = Level.NoDebug

function timestamp(): string {
    return moment().format('HH:mm:ss.SSS')
}

export function setLevel(value: string): void {
    switch (value) {
        case 'info':  level = Level.NoDebug; break
        case 'warn':  level = Level.NoDebugNoInfo; break
        case 'error': level = Level.NoDebugNoInfoNoWarning; break
        default:      level = Level.All
    }
}

export function sendAlarmMail(subject : string, message : string): void {
    let transport = nodemailer.createTransport({
        host: config.dict.smtpHost,
        port: config.dict.smtpPort,
        secure: false,
        tls: {
            rejectUnauthorized: false
        }
    });

    let mail : nodemailer.SendMailOptions = {
        from: config.dict.smtpSender,
        to: config.dict.smtpReceiver,
        subject: subject,
        text: message
    };

    transport.sendMail(mail)
        .then((v : nodemailer.SentMessageInfo) => {
            info(`Mail sent, ${subject}, ${message}, ${v.response}`)
        })
        .catch((reason : any) => {
            error(`Failure when sending alarm mail: ${message}, ${reason}`)
        })

}

export function info(message: string): void {
    if (level < Level.NoDebugNoInfo) {
        console.log(`${timestamp()} [ II ] ${message}`)
    }
}

export function warn(message: string): void {
    if (level < Level.NoDebugNoInfoNoWarning) {
        console.log(`${timestamp()} [ WW ] ${message}`)
    }
}

export function error(message: string): void {
    console.log(`${timestamp()} [ EE ] ${message}`)
}

export function success(message: string): void {
    console.log(`${timestamp()} [ OK ] ${message}`)
}

export function debug(message: string): void {
    if (level < Level.NoDebug) {
        console.log(`${timestamp()} [ DB ] ${message}`)
    }
}