export type GatewayStderrClassification = {
  level: 'drop' | 'debug' | 'warn';
  normalized: string;
};

const MAX_STDERR_LINES = 120;

export function classifyGatewayStderrMessage(message: string): GatewayStderrClassification {
  const normalized = message.trim();
  if (!normalized) {
    return { level: 'drop', normalized };
  }

  if (normalized.includes('openclaw-control-ui') && normalized.includes('token_mismatch')) {
    return { level: 'drop', normalized };
  }
  if (normalized.includes('closed before connect') && normalized.includes('token mismatch')) {
    return { level: 'drop', normalized };
  }
  if (normalized.includes('[ws] closed before connect') && normalized.includes('code=1005')) {
    return { level: 'debug', normalized };
  }
  if (normalized.includes('ExperimentalWarning')) {
    return { level: 'debug', normalized };
  }
  if (normalized.includes('DeprecationWarning')) {
    return { level: 'debug', normalized };
  }
  if (normalized.includes('Debugger attached')) {
    return { level: 'debug', normalized };
  }
  if (normalized.includes('Config warnings:')) {
    return { level: 'debug', normalized };
  }
  if (normalized.includes('node: --require is not allowed in NODE_OPTIONS')) {
    return { level: 'debug', normalized };
  }

  return { level: 'warn', normalized };
}

export function recordGatewayStartupStderrLine(lines: string[], line: string): void {
  const normalized = line.trim();
  if (!normalized) {
    return;
  }

  lines.push(normalized);
  if (lines.length > MAX_STDERR_LINES) {
    lines.splice(0, lines.length - MAX_STDERR_LINES);
  }
}