function generate() {
  const provider = document.getElementById('provider').value.trim();
  const model = document.getElementById('model').value.trim();
  const apikey = document.getElementById('apikey').value.trim();
  const gatewayToken = document.getElementById('gateway_token').value.trim() || crypto.randomUUID();
  const telegramBot = document.getElementById('telegram_bot_token').value.trim();
  const telegramUsers = document.getElementById('telegram_users').value.trim();
  const customBase = document.getElementById('custom_base').value.trim();
  const hfToken = document.getElementById('hf_token').value.trim();

  const lines = [];
  lines.push('# ── Hermes-HF Environment ──');
  lines.push(`# Generated: ${new Date().toISOString()}`);
  lines.push('');

  if (hfToken) {
    lines.push(`HF_TOKEN=${hfToken}`);
  } else {
    lines.push('# HF_TOKEN= (needed for Dataset backup)');
  }
  lines.push(`GATEWAY_TOKEN=${gatewayToken}`);
  lines.push('');

  const providerMap = {
    openrouter: { prefix: 'openrouter/', keyVar: 'OPENROUTER_API_KEY' },
    huggingface: { prefix: 'huggingface/', keyVar: 'HF_TOKEN' },
    anthropic: { prefix: 'anthropic/', keyVar: 'ANTHROPIC_API_KEY' },
    openai: { prefix: 'openai/', keyVar: 'OPENAI_API_KEY' },
    google: { prefix: 'google/', keyVar: 'GOOGLE_API_KEY' },
    deepseek: { prefix: 'deepseek/', keyVar: 'DEEPSEEK_API_KEY' },
    xai: { prefix: 'xai/', keyVar: 'XAI_API_KEY' },
    custom: { prefix: '', keyVar: 'OPENAI_API_KEY' },
  };

  const pm = providerMap[provider];

  if (pm && model) {
    if (provider === 'custom' && customBase) {
      lines.push(`HERMES_MODEL=${model}`);
      lines.push(`CUSTOM_BASE_URL=${customBase}`);
      if (apikey) lines.push(`CUSTOM_API_KEY=${apikey}`);
    } else {
      lines.push(`HERMES_MODEL=${pm.prefix}${model}`);
      if (apikey) lines.push(`${pm.keyVar}=${apikey}`);
    }
  } else if (apikey) {
    lines.push(`LLM_API_KEY=${apikey}`);
  }

  if (telegramBot) {
    lines.push('');
    lines.push(`TELEGRAM_BOT_TOKEN=${telegramBot}`);
    if (telegramUsers) {
      lines.push(`TELEGRAM_ALLOWED_USERS=${telegramUsers}`);
    }
  }

  lines.push('');
  lines.push('BACKUP_DATASET_NAME=hermes-hf-backup');
  lines.push('');

  const el = document.getElementById('envOutput');
  el.textContent = lines.join('\n');
  document.getElementById('output').classList.add('show');
}

function copyEnv() {
  const text = document.getElementById('envOutput').textContent;
  navigator.clipboard.writeText(text).then(() => {
    const btn = document.querySelector('.copy-btn');
    const orig = btn.textContent;
    btn.textContent = 'Copied!';
    setTimeout(() => btn.textContent = orig, 2000);
  });
}