export function parseLines(value) {
  return value.split(/\r?\n/).map(line => line.trim()).filter(Boolean);
}

export function parseArgs(value) {
  if (!value.trim().startsWith('[')) return parseLines(value);
  let args;
  try { args = JSON.parse(value); }
  catch { throw new Error('参数 JSON 格式不正确，请填写字符串数组。'); }
  if (!Array.isArray(args) || args.some(arg => typeof arg !== 'string')) {
    throw new Error('参数必须是 JSON 字符串数组，或每行一个参数。');
  }
  return args;
}

export function appendLog(previous, incoming, limit = 240000) {
  const all = previous + incoming;
  return {text: all.slice(-limit), trimmed: all.length > limit};
}

export function requestId() {
  if (typeof crypto.randomUUID === 'function') return crypto.randomUUID();
  // LAN HTTP can lack randomUUID; getRandomValues remains available there.
  const bytes = crypto.getRandomValues(new Uint8Array(16));
  bytes[6] = (bytes[6] & 15) | 64;
  bytes[8] = (bytes[8] & 63) | 128;
  const hex = Array.from(bytes, byte => byte.toString(16).padStart(2, '0')).join('');
  return `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20)}`;
}