// RA-H OS Bridge Schema Validation Middleware
function validateNodePayload(payload) {
  const errors = [];
  const required = ['tenant', 'namespace', 'type', 'visibility', 'state', 'captured_by'];
  const defaults = { 
    tenant: 'syslogsolution', 
    namespace: 'syslogsolution', 
    type: 'note',
    visibility: 'shared',
    state: 'not_processed',
    captured_by: 'agent'
  };
  
  for (const field of required) {
    payload.metadata = payload.metadata || {}; 
    if (!payload.metadata[field]) {
      if (defaults[field]) payload.metadata[field] = defaults[field];
      else errors.push('Missing required field: ' + field);
    }
  }
  
  // Also ensure source_metadata exists for compatibility
  if (!payload.metadata.source_metadata) {
    payload.metadata.source_metadata = {};
  }
  
  return errors;
}

function validateEdgePayload(payload) {
  const errors = [];
  if (!payload.explanation) {
    if (payload.context?.explanation) payload.explanation = payload.context.explanation;
    else errors.push('Missing required field: explanation');
  }
  return errors;
}

function validationMiddleware(operation, payload) {
  let errors = [];
  if (['createNode', 'updateNode'].includes(operation)) errors = validateNodePayload(payload);
  else if (operation === 'createEdge') errors = validateEdgePayload(payload);
  
  if (errors.length > 0) {
    console.error('[BRIDGE_VALIDATION] ' + operation + ' rejected:', { errors: errors, timestamp: new Date().toISOString() });
    return { success: false, errors: errors };
  }
  return { success: true, payload: payload };
}
module.exports = { validationMiddleware };