const config = require('../config');
const { proxyRequest } = require('./websocket');
const { parseStoreNumber } = require('../utils/validate');

function getSiwAuthHeaders() {
  const { username, password } = config.siw;
  if (!username || !password) {
    throw new Error('SIW credentials are not configured (SIW_USERNAME / SIW_PASSWORD)');
  }
  const authString = Buffer.from(`${username}:${password}`).toString('base64');
  return { Authorization: `Basic ${authString}` };
}

function buildSiwRequest(path) {
  if (!config.siw.baseUrl) {
    throw new Error('SIW_BASE_URL is not configured');
  }
  return {
    method: 'GET',
    url: `${config.siw.baseUrl}${path}`,
    headers: getSiwAuthHeaders(),
  };
}

async function getStoreLocation(storeNumber) {
  const normalized = parseStoreNumber(storeNumber);
  if (!normalized) throw new Error('Invalid store number');

  const result = await proxyRequest(buildSiwRequest(`/StoreLocation/${normalized}`));
  return result.data;
}

async function getStoreRegisters(storeNumber) {
  const normalized = parseStoreNumber(storeNumber);
  if (!normalized) throw new Error('Invalid store number');

  const result = await proxyRequest(buildSiwRequest(`/StoreRegister/${normalized}`));
  return result.data || [];
}

async function getStorePrinters(storeNumber) {
  const normalized = parseStoreNumber(storeNumber);
  if (!normalized) throw new Error('Invalid store number');

  const result = await proxyRequest(buildSiwRequest(`/StorePrinter/${normalized}`));
  return result.data || [];
}

async function getStorePaymentTerminals(storeNumber) {
  const normalized = parseStoreNumber(storeNumber);
  if (!normalized) throw new Error('Invalid store number');

  const result = await proxyRequest(buildSiwRequest(`/StorePayment/${normalized}`));
  return result.data || [];
}

module.exports = {
  getStoreLocation,
  getStoreRegisters,
  getStorePrinters,
  getStorePaymentTerminals,
};