const express = require('express');
const multer = require('multer');
const cors = require('cors');

const {
  initializeSalesforceConnection,
  attachPdfToAccount,
  splitExcelFile,
  splitPDF,
  cleanUp
} = require('./services');

const app = express();
app.use(cors({
  origin: 'http://localhost:5173'
}));

const upload = multer({ dest: 'uploads/' });

app.post('/api/documents', upload.array('documents'), async (req, res) => {
  const documentTitle = req.body.title;

  let excelFile = null;
  let pdfFile = null;

  if (req.files && req.files.length > 0) {
    req.files.forEach((file) => {
      const fileName = file.originalname.toLowerCase();
      if (fileName.endsWith('.xlsx') || fileName.endsWith('.xls')) {
        excelFile = file.path;
      } else if (fileName.endsWith('.pdf')) {
        pdfFile = file.path;
      }
    });
  }

  if (!documentTitle || !excelFile || !pdfFile) {
    if (req.files) {
      cleanUp(req.files.map((f) => f.path));
    }
    return res.status(400).json({
      error: !documentTitle ? 'Document title is required' : 'Both excel and pdf files are required'
    });
  }

  const tempFilePath = [];
  try {
    let resultExcel = await splitExcelFile(excelFile);
    let resultPdf = await splitPDF(resultExcel, pdfFile, tempFilePath);

    await initializeSalesforceConnection();
    await attachPdfToAccount(resultPdf, documentTitle); // No need to pass sfdc

    return res.status(200).json({
      ok: true,
      message: 'Files uploaded successfully!'
    });
  } catch (err) {
    console.error('Error in processing the files: ', err);
    return res.status(500).json({
      ok: false,
      message: 'Error in processing and uploading the files'
    });
  } finally {
    cleanUp(tempFilePath);
    cleanUp([excelFile, pdfFile]);
  }
});

module.exports = { app };