/**
 * Medical Imaging: High-Precision Image Similarity Search
 *
 * Use Case: Medical diagnosis requires highest possible accuracy
 * for similar case retrieval and diagnostic assistance.
 *
 * Optimization Priority: RECALL/PRECISION (latency trade-off acceptable)
 */

import { UnifiedMetrics } from '../../types';

export const MEDICAL_ATTENTION_CONFIG = {
  heads: 16,                       // More heads = better quality (vs 8-head optimal)
  forwardPassTargetMs: 50,         // 50ms acceptable (diagnostic aid, not real-time)
  batchSize: 32,                   // Batch processing for efficiency
  precision: 'float32' as const,   // Full precision (medical data critical)
  ensembleSize: 3,                 // 3-model ensemble for robustness

  // High-recall configuration
  recallTarget: 0.99,              // 99% recall required (vs 96.8% general)
  precisionTarget: 0.95,           // 95% precision required

  // Self-healing with medical data integrity
  selfHealing: {
    enabled: true,
    adaptationIntervalMs: 1000,    // 1s monitoring (less critical than trading)
    degradationThreshold: 0.01,    // 1% tolerance (strict for medical)
    dataIntegrityChecks: true      // Verify data quality
  }
};

// Medical-specific metrics
export interface MedicalMetrics extends UnifiedMetrics {
  recallAt100: number;             // Recall@100 (retrieve more candidates)
  precisionAt10: number;           // Precision@10 (top results critical)
  diagnosticAgreement: number;     // Agreement with expert diagnosis
  falseNegativeRate: number;       // Critical for medical (missed diagnoses)
  dataIntegrityScore: number;      // DICOM compliance, quality checks
}

// Similar case interface
export interface SimilarCase {
  caseId: string;
  diagnosis: string;
  similarity: number;
  radiologistNotes: string;
  confidence: number;
}

// Example: Similar case retrieval for diagnosis
export async function findSimilarCases(
  patientScan: Float32Array,       // MRI/CT scan embeddings
  medicalDatabase: any,            // HNSWGraph type
  applyAttention: (data: Float32Array, config: any) => Promise<Float32Array>,
  runEnsemble: (data: Float32Array, size: number) => Promise<any[]>,
  calculateEnsembleConfidence: (candidate: any, ensemble: any[]) => number,
  minConfidence: number = 0.95
): Promise<SimilarCase[]> {
  const config = MEDICAL_ATTENTION_CONFIG;

  // 16-head attention for high-quality embeddings
  const enhanced = await applyAttention(patientScan, config);

  // High-recall search (k=100 for comprehensive retrieval)
  const candidates = await medicalDatabase.search(enhanced, 100);

  // Ensemble voting for robustness
  const ensembleResults = await runEnsemble(patientScan, config.ensembleSize);

  // Filter by confidence threshold
  return candidates
    .filter((c: any) => c.score >= minConfidence)
    .map((c: any) => ({
      caseId: c.id,
      diagnosis: c.metadata.diagnosis,
      similarity: c.score,
      radiologistNotes: c.metadata.notes,
      confidence: calculateEnsembleConfidence(c, ensembleResults)
    }));
}

// Performance targets for medical imaging
export const MEDICAL_PERFORMANCE_TARGETS = {
  recallAt100: 0.99,               // 99% recall (comprehensive retrieval)
  precisionAt10: 0.95,             // 95% precision (top 10 highly relevant)
  p50LatencyMs: 50,                // 50ms median (batch processing acceptable)
  falseNegativeRate: 0.01,         // <1% false negatives (critical)
  uptimePercent: 99.9              // 99.9% uptime (3 nines)
};

// Medical imaging modality-specific configurations
export const MEDICAL_CONFIG_VARIATIONS = {
  // CT scans (high resolution, more detail needed)
  ctScans: {
    ...MEDICAL_ATTENTION_CONFIG,
    heads: 20,                     // Even more heads for fine detail
    recallTarget: 0.995,           // 99.5% recall
    ensembleSize: 5                // Larger ensemble
  },

  // MRI scans (multiple sequences, complex)
  mriScans: {
    ...MEDICAL_ATTENTION_CONFIG,
    heads: 16,
    multiSequenceFusion: true,     // Fuse T1, T2, FLAIR, etc.
    recallTarget: 0.99
  },

  // X-rays (simpler, faster acceptable)
  xrays: {
    ...MEDICAL_ATTENTION_CONFIG,
    heads: 12,
    forwardPassTargetMs: 30,       // Faster processing
    recallTarget: 0.98
  },

  // Pathology slides (ultra-high resolution)
  pathology: {
    ...MEDICAL_ATTENTION_CONFIG,
    heads: 24,                     // Maximum detail
    forwardPassTargetMs: 100,      // Allow more time
    recallTarget: 0.995,
    hierarchicalProcessing: true   // Process at multiple scales
  }
};

// Clinical urgency adaptations
export function adaptConfigToUrgency(
  baseConfig: typeof MEDICAL_ATTENTION_CONFIG,
  urgency: 'routine' | 'urgent' | 'emergency'
): typeof MEDICAL_ATTENTION_CONFIG {
  switch (urgency) {
    case 'routine':
      return {
        ...baseConfig,
        heads: 20,                 // Maximum quality
        forwardPassTargetMs: 100,  // Allow more time
        ensembleSize: 5            // Largest ensemble
      };
    case 'urgent':
      return {
        ...baseConfig,
        heads: 16,                 // Balanced
        forwardPassTargetMs: 50
      };
    case 'emergency':
      return {
        ...baseConfig,
        heads: 12,                 // Faster, still high quality
        forwardPassTargetMs: 20,
        ensembleSize: 1,           // Skip ensemble for speed
        recallTarget: 0.97         // Slight quality trade-off
      };
  }
}

// Data quality monitoring
export interface MedicalDataQuality {
  dicomCompliance: boolean;
  resolutionAdequate: boolean;
  contrastQuality: number;
  artifactScore: number;
  calibrationValid: boolean;
}

export function validateMedicalData(scan: any): MedicalDataQuality {
  return {
    dicomCompliance: checkDICOMHeaders(scan),
    resolutionAdequate: checkResolution(scan),
    contrastQuality: assessContrast(scan),
    artifactScore: detectArtifacts(scan),
    calibrationValid: verifyCalibration(scan)
  };
}

// Placeholder validation functions
function checkDICOMHeaders(scan: any): boolean { return true; }
function checkResolution(scan: any): boolean { return true; }
function assessContrast(scan: any): number { return 0.95; }
function detectArtifacts(scan: any): number { return 0.02; }
function verifyCalibration(scan: any): boolean { return true; }