const span = container.span({
  id: 'authentication-span',
  name: 'User Authentication Process',
});

// Add operations to the span
const generation = span.generation({
  id: 'token-validation',
  provider: 'internal',
  model: 'auth-validator',
  messages: [{ role: 'system', content: 'Validate token' }],
  modelParameters: {}
});

// Nested spans for complex operations
const parentSpan = container.span({
  id: 'document-processing',
  name: 'Document Analysis Pipeline'
});

const childSpan = parentSpan.span({
  id: 'text-extraction',
  name: 'Text Extraction Phase'
});

const retrieval = childSpan.retrieval({
  id: 'knowledge-lookup',
  name: 'Knowledge Base Lookup'
});

const span = container.span({
  id: 'data-validation-span',
  name: 'Input Data Validation',
});

container.evaluate.withEvaluators('bias', 'toxicity');

span.addAttachment({
  id: 'processing-result',
  type: 'file',
  path: './output/processed_data.json',
  name: 'Processing Results'
});

container.addMetadata({
  requestId: 'req-123',
  userAgent: 'Mozilla/5.0...',
  processingTime: 1500
});

container.addTag('environment', 'production');
container.addTag('user_type', 'premium');

// End a container when processing is complete
container.end();

const error = span.error({
  id: 'validation-error',
  message: 'Input validation failed',
  code: 'INVALID_INPUT',
  type: 'ValidationError'
});

container.event(
  'checkpoint-1',
  'Processing Milestone',
  { phase: 'preprocessing', status: 'complete' },
  { itemsProcessed: 1000, timeElapsed: 5.2 }
);

const generation = span.generation({
  id: 'validation-check',
  provider: 'openai',
  model: 'gpt-4',
  messages: [{ role: 'user', content: 'Validate this input' }],
  modelParameters: { temperature: 0.1 }
});

const retrieval = span.retrieval({
  id: 'context-lookup',
  name: 'Context Database Lookup',
});

retrieval.input('user query context');
retrieval.output(['relevant context 1', 'relevant context 2']);

const childSpan = parentSpan.span({
  id: 'preprocessing-step',
  name: 'Data Preprocessing',
});

const toolCall = span.toolCall({
  id: 'api-call',
  name: 'external_api_call',
  description: 'Fetch data from external service',
  args: JSON.stringify({ endpoint: '/users', id: 123 })
});

toolCall.result('{"name": "John", "email": "[email protected]"}');