import Printer from "@node-escpos/core";
import Network from "@node-escpos/network-adapter";
import { Buffer } from "buffer";
import _ from "lodash";

const statics: any = {
    'ESC': '1B',
    'FF': '0C'
}

const mmToInch = 0.0393701;
// 26x51 label, or 1" x 2"

const pageWidth = getPageDimensionParameters(2);
const pageHeight = getPageDimensionParameters(1 / 2);
const command = `
    ESC i a 00h
    ESC @
    ESC i L 00h
    ESC ( C 02h 00h ${pageWidth.mL} ${pageWidth.mH}
    ESC $ CBh 00h
    ESC ( V 02h 00h ${pageHeight.mL} ${pageHeight.mH}
    ESC k 0Bh
    ESC X 00h 40h 00h
    ESC i t0 r0 e0 z0 f1 B 123456789 \\
    FF
`;

const barcodeHeight = getPageDimensionParameters(1 / 2);

const grocycodeTest = `
ESC @
ESC i a 00h
ESC i D 6h 00h 28h 28h 00h 00h 00h 00h 00h grcy:p:13:60bf8b5244b04 \\\\\\
FF
`

const grocy_template_hex = parseEscToHex(`
  ^II
  ^TS001 `) + parseTextToHex(`THT 02-01-2026`) +
  parseEscToHex(`09h`) + parseTextToHex(`Test Product met lange naam`) +
    parseEscToHex(`
  09h
  grcy:p:13:60bf8b5244b04
  ^FF
`);

function inchToDots(value: number, dpi = 203) {
    const dots = value * dpi;
    const margin = 6 * mmToInch * dpi;

    return Math.round(dots - margin);
}

function toHex(value: number) {
    return value.toString(16).padStart(2, '0') + 'h';
}

function getPageDimensionParameters(inInches: number) {
    const dots = inchToDots(inInches);

    const mH = Math.floor(dots / 265);
    const mL = dots - mH * 265;

    return {
        mH: toHex(mH), mL: toHex(mL)
    }
}

function parseEscToHex(text: string): string {

    return text.trim().split(/\s+/)
        .map(chunk => parseTextToHex(chunk))
        .join(' ')
}

function parseTextToHex(text: string): string {
    if (_.has(statics, text)) {
        // Found static mapping
        return statics[text]
    }

    if(text.length == 3 && text.endsWith('h')) {
        // parse as hex
        return text.slice(0, -1)
    }

    return Buffer.from(text).toString('hex')
}


///

const device = new Network('172.20.0.112');

device.open(async function (err) {
    if (err) {
        // handle error
        return
    }

    // encoding is optional
    const options = {encoding: "GB18030" /* default */}
    let printer = new Printer(device, options);

    // Path to png image

    printer
        // .raw(parseEscToHex(grocy_template_print))
        .raw(grocy_template_hex)
        // .size(1, 1)
        // .text('EAN13 barcode example')
        .close()
});