const fs = require("fs");
const path = require("path");
const PizZip = require("pizzip");
const Docxtemplater = require("docxtemplater");

function generateInvoice(data) {
    const templatePath = path.join(__dirname, "../templates/invoice_template.docx");
    const content = fs.readFileSync(templatePath, "binary");

    const zip = new PizZip(content);
    const doc = new Docxtemplater(zip, {
        paragraphLoop: true,
        linebreaks: true
    });

    doc.render(data);

    const buffer = doc.getZip().generate({
        type: "nodebuffer",
        compression: "DEFLATE"
    });

    return buffer;
}

module.exports = generateInvoice;