const http = require('http');

const PORT = 13370;

function getNanosecondTimestamp() {
  const isoString = new Date().toISOString(); 
  const base = isoString.slice(0, -1); 
  const nanoseconds = (process.hrtime.bigint() % 1000000n).toString().padStart(6, '0');
  
  return `${base}${nanoseconds}Z`;
}

const server = http.createServer((req, res) => {
  if (req.method === 'POST') {
    let body = '';

    req.on('data', chunk => {
      body += chunk.toString();
    });

    req.on('end', () => {
      try {
        const parsedBody = JSON.parse(body);
        
        const customMessage = {
          AuthToken: "Token Valid",
          OriginalMessageRefId: parsedBody.OriginalMessageRefId,
          RequestTime: parsedBody.RequestTime,
          ResponseCode: "0000",
          ResponseCodeDesc: "Approve - Without Check Core",
          ResponseTime: getNanosecondTimestamp(),
          TransactionRefId: parsedBody.transactionRefId,
          amount: "",
          ref: "",
          rsp: "",
          rspdesc: "",
          transactionAmount: parsedBody.transactionAmount,
          transactionDate: parsedBody.transactionDate,
          transactionTime: parsedBody.transactionTime,
          // status: "success",
          // message: parsedBody.customField, 
          // data: {
          //   id: 1,
          //   active: true
          // }
        };

        res.writeHead(200, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify(customMessage));
      } catch (error) {
        res.writeHead(400, { 'Content-Type': 'application/json' });
        res.end(JSON.stringify({ error: "Invalid JSON" }));
      }
    });
  } else {
    res.writeHead(405, { 'Content-Type': 'application/json' });
    res.end(JSON.stringify({ error: "Only POST allowed" }));
  }
});

server.listen(PORT, () => {
  console.log(`Server running at http://localhost:${PORT}/`);
});

// const customMessage = {
//     AuthToken: "Token Valid",
//     OriginalMessageRefId: "B10105001179",
//     RequestTime: "2026-05-29T17:05:30.307+07:00",
//     ResponseCode: "0000",
//     ResponseCodeDesc: "Approve - Without Check Core",
//     ResponseTime: "2026-05-29T10:05:32.781824276Z",
//     TransactionRefId: "5001179",
//     amount: "",
//     ref: "",
//     rsp: "",
//     rspdesc: "",
//     transactionAmount: "10000000",
//     transactionDate: "2026-05-29",
//     transactionTime: "17:05:32",
// };

// const server = http.createServer((req, res) => {
//   res.writeHead(200, { 'Content-Type': 'application/octet-stream' });
//   res.end(JSON.stringify(customMessage));
// });

// server.listen(PORT, () => {
//   console.log(`Server running at http://localhost:${PORT}/`);
// });