const https = require('node:https');
const { gunzipSync } = require('node:zlib');

const HOST = process.env.JTL_HOST || '192.168.178.81';
const PORT = Number(process.env.JTL_PORT) || 4433;

const INIT_QUERY =
  'mandantId=1&lastChangedCategory=0&lastChangedCustomer=0&lastChangedCustomerGroup=0&lastChangedProduct=0&lastChangedConfigurationGroup=0&lastChangedConfigurationItem=0&lastChangedCompositeProduct=0&lastChangedDeletedEntity=0';

function usage() {
  console.error('Usage:');
  console.error('  node test-client.js <authCode> [name]     # 6-digit: step1+2, 4-digit: step1 only');
  console.error('  node test-client.js init <authToken>');
  console.error('  node test-client.js customergroup <authToken> [lastChangedCustomerGroup]');
  console.error('  node test-client.js deletedentity <authToken> [lastChangedDeletedEntity]');
  console.error('  node test-client.js category <authToken> [lastChangedCategory]');
  console.error('  node test-client.js customer <authToken> [lastChangedCustomer]');
  console.error('  node test-client.js product <authToken> [lastChangedProduct]');
  console.error('  node test-client.js productcomposite <authToken> [lastChangedCompositeProduct]');
  process.exit(1);
}

function posHeaders(authToken) {
  const headers = {
    accept: 'application/json',
    'content-type': 'application/json',
    'cache-control': 'no-cache',
    version: '1.0.11.14',
    system: 'JTL-POS',
    charset: 'utf-8',
    connection: 'Keep-Alive',
    'user-agent':
      'Dalvik/2.1.0 (Linux; U; Android 14; SM-A528B Build/UP1A.231005.007)',
    'accept-encoding': 'gzip',
  };

  if (authToken) {
    headers.authorization = `Bearer ${authToken}`;
  }

  return headers;
}

function decodeBody(buffer, headers) {
  if (headers['content-encoding'] === 'gzip') {
    return gunzipSync(buffer);
  }
  return buffer;
}

function request(path, authToken) {
  return new Promise((resolve, reject) => {
    const req = https.request(
      {
        hostname: HOST,
        port: PORT,
        path,
        method: 'GET',
        headers: posHeaders(authToken),
        rejectUnauthorized: false,
      },
      (res) => {
        const chunks = [];
        res.on('data', (chunk) => chunks.push(chunk));
        res.on('end', () => {
          const raw = Buffer.concat(chunks);
          resolve({
            statusCode: res.statusCode,
            headers: res.headers,
            body: decodeBody(raw, res.headers),
          });
        });
      }
    );

    req.on('error', reject);
    req.end();
  });
}

function printResponse(res) {
  console.log(`status: ${res.statusCode}`);
  console.log('headers:', JSON.stringify(res.headers, null, 2));
  console.log('body:');
  try {
    console.log(JSON.stringify(JSON.parse(res.body.toString('utf8')), null, 2));
  } catch {
    console.log(res.body.toString('utf8'));
  }
}

async function clientRequest(authCode, name, label) {
  const path = `/api/v1/client?authCode=${encodeURIComponent(authCode)}&name=${encodeURIComponent(name)}`;
  console.log(`${label} GET https://${HOST}:${PORT}${path}\n`);
  const res = await request(path);
  printResponse(res);
  console.log();
  return res;
}

async function main() {
  const mode = process.argv[2];

  if (!mode) {
    usage();
  }

  if (mode === 'init') {
    const authToken = process.argv[3] || process.env.AUTH_TOKEN;
    if (!authToken) {
      usage();
    }

    const path = `/api/v1/init?${INIT_QUERY}`;
    console.log(`GET https://${HOST}:${PORT}${path}\n`);

    const res = await request(path, authToken);
    printResponse(res);
    return;
  }

  if (mode === 'customergroup') {
    const authToken = process.argv[3] || process.env.AUTH_TOKEN;
    if (!authToken) {
      usage();
    }

    const lastChanged = process.argv[4] || '0';
    const path = `/api/v1/customergroup?mandantId=1&lastChangedCustomerGroup=${encodeURIComponent(lastChanged)}`;
    console.log(`GET https://${HOST}:${PORT}${path}\n`);

    const res = await request(path, authToken);
    printResponse(res);
    return;
  }

  if (mode === 'deletedentity') {
    const authToken = process.argv[3] || process.env.AUTH_TOKEN;
    if (!authToken) {
      usage();
    }

    const lastChanged = process.argv[4] || '0';
    const path = `/api/v1/deletedentity?mandantId=1&limit=200&lastChangedDeletedEntity=${encodeURIComponent(lastChanged)}`;
    console.log(`GET https://${HOST}:${PORT}${path}\n`);

    const res = await request(path, authToken);
    printResponse(res);
    return;
  }

  const entityModes = {
    category: {
      param: 'lastChangedCategory',
      path: '/api/v1/category?mandantId=1&limit=20',
    },
    customer: {
      param: 'lastChangedCustomer',
      path: '/api/v1/customer?mandantId=1&limit=20',
    },
    product: {
      param: 'lastChangedProduct',
      path: '/api/v1/product?mandantId=1&limit=20',
    },
    productcomposite: {
      param: 'lastChangedCompositeProduct',
      path: '/api/v1/productcomposite?mandantId=1&limit=20',
    },
  };

  if (entityModes[mode]) {
    const authToken = process.argv[3] || process.env.AUTH_TOKEN;
    if (!authToken) {
      usage();
    }

    const { param, path: basePath } = entityModes[mode];
    const lastChanged = process.argv[4] || '0';
    const path = `${basePath}&${param}=${encodeURIComponent(lastChanged)}`;
    console.log(`GET https://${HOST}:${PORT}${path}\n`);

    const res = await request(path, authToken);
    printResponse(res);
    return;
  }

  const name = process.argv[3] || process.env.CLIENT_NAME || '001';
  const fullCode = mode;

  if (fullCode.length === 6) {
    await clientRequest(fullCode.slice(0, 4), name, '=== step 1 (4 digits) ===');
    await clientRequest(fullCode, name, '=== step 2 (6 digits) ===');
    return;
  }

  await clientRequest(fullCode, name, '=== step 1 (4 digits) ===');
}

main().catch((err) => {
  console.error('request failed:', err.message);
  process.exit(1);
});