document.addEventListener("DOMContentLoaded", () => {

let btn = document.getElementById('btn-start');

function asynchronousProcess(index) {
    new Promise( (resolve, reject) => {

    const protocol = "https:"
    const ipAddress = "192.168.0.160";
    const xmlHTTPRequestURLMain = `${protocol}${ipAddress}/cgi-bin/fpmate.cgi`;

    const dataCommand = `<printerCommand> <directIO command="4229" data="${index}" /> </printerCommand>`;
    //const dataCommand = `<printerCommand> <directIO command="4229" data="255" /> </printerCommand>`;

    const epos = new epson.fiscalPrint();

        // 4 229 - SCAN CODE REF
    // 4 229 - SCAN CODE REF | FUNCTION

    epos.onreceive = (result, tag_names_array, add_info, res_add) => {
        if (result.success == true) {
            resolve(add_info.responseData)
            //console.log(add_info.responseData)
            //fs.appendFileSync('message.json', add_info.responseData);
            //console.log(`N${i}: add_info.responseData`)
        }
    };
    epos.send(xmlHTTPRequestURLMain, dataCommand, 99000);
    });
  }

    btn.addEventListener('click', async () => {
    console.log("click")

    const j = 255;
        for (let i = 0; i < j; i++) {

            if ((i + "").length < 2) {
                index = "00" + i
            } else if ((i + "").length < 3) {
                index = "0" + i
            } else {
                index = i.toString()
            }
            await asynchronousProcess(i)
        }

    });
});