const fs = require('fs');
const logger = require('komodo-sdk/logger');
const mailparser = require('../mailparser-wrapper');

const eventType = 'FAILED';

module.exports = async (msgFilename) => {
    const msg = await fs.promises.readFile(msgFilename);

    if (!msg) {
        logger.warn('Sent failed detected but we can not read message file', { eventType, msgFile: msgFilename });
        return;
    }

    const parsedMsg = await mailparser(msg);
    if (!parsedMsg || !parsedMsg.headers) {
        logger.warn('Sent failed detected and we can not parsed message file', {
            eventType,
            msgFile: msgFilename,
            msgFileContent: (msg || '').toString(),
        });
        return;
    }

    const to = parsedMsg.headers.get('to').text;
    const modem = parsedMsg.headers.get('modem');
    const imsi = parsedMsg.headers.get('imsi');
    const imei = parsedMsg.headers.get('imei');
    const failReason = parsedMsg.headers.get('fail_reason');
    const failed = parsedMsg.headers.get('failed');
    const { text } = parsedMsg;

    logger.verbose('Sent failed detected', {
        eventType,
        msgFile: msgFilename,
        to,
        modem,
        imsi,
        imei,
        failReason,
        failed,
        text,
    });
};