const TemplateHandler = require("easy-template-x");
const fs = require("fs");
const path = require("path");


async function generateDocxFromTemplate(
  configPath,
  bufferMap,
  templateFolderName,
  orderNo
) {
  const templateHandler = new TemplateHandler();
  // const __dirname = path.dirname(new URL(import.meta.url).pathname);
  const templateName= templateFolderName.split('_')[0];
  const templateFile = fs.readFileSync(
    path.join(__dirname, "templates", `${templateName}.docx`),
  );

  const content = fs.readFileSync(configPath, 'utf-8');
  const lines = content.split(/\r?\n/).filter(line => line.trim() !== '');

  if(lines.length < 3){
    throw new Error(`Expected 3 or more lines in config file, but got ${lines.length}`);
  }
  
  const [line1 = '', line2 = '', line3= '', line4 = ''] = lines.map(line => line.trim());

  const description = line1;
  const location = line2;
  const addInfo = line3;
  const addInfo2 = line4;

  let data = {};
  switch (templateName) {
    case "template1":
      data = {
        orderNumber: orderNo,
        description: description,
        location: location,
        damagedColumnNo: addInfo,
      };
      break;

    case "template2":
      data = {
        orderNumber: orderNo,
        description: description,
        location: location,
        existingLight: addInfo,
      };
      break;
    
    case "template3":
    data = {
      orderNumber: orderNo,
      description: description,
      location: location,
      existingColumnNo: addInfo,
    };
    break;

    case "template4":
    data = {
      orderNumber: orderNo,
      description: description,
      location: location,
      existingColumnNo: addInfo,
    };
    break;

    case "template5":
    data = {
      orderNumber: orderNo,
      description: description,
      location: location,
      existingColumnNo: addInfo,
      existingColumnNo2: addInfo2,
    };
    break;

    case "template6":
    data = {
      orderNumber: orderNo,
      description: description,
      location: location,
      existingJunctionNo: addInfo,
    };
    break;

    case "template7":
    data = {
      orderNumber: orderNo,
      description: description,
      location: location,
      rustyColumnNo: addInfo,
    };
    break;

    case "template8":
    data = {
      orderNumber: orderNo,
      description: description,
      location: location,
      rustyColumnNo: addInfo,
    };
    break;

    case "template9":
    data = {
      orderNumber: orderNo,
      description: description,
      location: location,
      rustyColumnNo: addInfo,
    };
    break;

    default:
      console.warn(`⚠️ Unknown template: ${templateFolderName}`);
  }
  
  for (const [filename, buffer] of Object.entries(bufferMap)) {
    let justFilename = null;
    if(filename.includes('_')){
      justFilename = filename.split("_")[0];
    }else{
      justFilename = filename.split('.')[0];
    }
    
    data[`${justFilename}`] = {
      _type: "image",
      source: buffer,
      format: "image/jpeg",
      width: 246,
      height: 186,
    };
  }
  

  const doc = await templateHandler.process(templateFile, data);
  fs.writeFileSync(
    path.join("./reports", `${templateName}-${orderNo}-report.docx`),
    doc,
  );
}


module.exports = {
  generateDocxFromTemplate,
};