// Navigator Prime - HS Code Classification Engine
import { TaxRuleDB } from '@axon/customs-db';
import { RAGEngine } from '@axon/rag';

interface ClassificationResult {
  hsCode: string;
  confidence: number;
  rationale: string[];
  regulationFlags: string[];
}

async function classifyProduct(input: ProductInput): Promise<ClassificationResult> {
  // Step 1: Extract key attributes
  const attributes = await extractAttributes(input);
  
  // Step 2: RAG retrieval from customs database
  const candidates = await RAGEngine.query({
    materials: attributes.materials,
    usage: attributes.usage,
    specs: attributes.specifications,
    topK: 5
  });
  
  // Step 3: Rule-based validation
  const validated = candidates.filter(c => 
    TaxRuleDB.validate(c.hsCode, attributes)
  );
  
  // Step 4: Confidence scoring
  const scored = validated.map(c => ({
    ...c,
    confidence: calculateConfidence(c, attributes)
  }));
  
  // Step 5: Regulation check
  const flags = await checkRegulations(scored[0].hsCode);
  
  return {
    hsCode: scored[0].hsCode,       // "8471.30.0100"
    confidence: scored[0].confidence, // 0.987
    rationale: scored[0].rationale,
    regulationFlags: flags
  };
}