#!/usr/bin/env node
// ═══════════════════════════════════════════════════════════════════════════
// Evidence Weights — Viktad evidens för bättre resolution
// ═══════════════════════════════════════════════════════════════════════════

/**
 * Evidence Weights
 * 
 * Varje evidens-signal har en vikt. Resolution avgör utifrån
 * den sammanlagda vikten, inte långa listor av specialfall.
 */

const EVIDENCE_WEIGHTS = {
  // Miljö
  targetEnvironment: {
    production: 100,
    staging: 50,
    development: 10
  },
  
  // Åtkomstmetoder
  accessMethod: {
    ssh: 120,
    ssm: 120,
    telnet: 120,
    rdp: 120,
    api: 80,
    sdk: 80,
    'aws-cli': 80
  },
  
  // Dataoperationer
  dataOperation: {
    update: 120,
    delete: 120,
    insert: 120,
    alter: 120,
    drop: 120,
    select: -40,
    read: -40
  },
  
  // Infrastrukturoperationer
  infraOperation: {
    create: 120,
    modify: 120,
    update: 120,
    delete: 120,
    configure: 120,
    scale: 100,
    inventory: -60,
    plan: -60,
    validate: -60
  },
  
  // Releaseoperationer
  releaseOperation: {
    deploy: 120,
    release: 120,
    publish: 120,
    push: 120
  },
  
  // Sekretess
  secretPattern: {
    hardcoded_secret: 150,
    password: 150,
    token: 150,
    api_key: 150
  },
  
  // Filtyper
  fileType: {
    mjs: 80,
    js: 80,
    ts: 80,
    json: 60,
    yml: 60,
    yaml: 60,
    md: -80,      // Markdown är dokumentation
    txt: -60,     // Textfiler är dokumentation
    tf: 100,      // Terraform är infrastruktur
    hcl: 100
  },
  
  // Kontext
  context: {
    manual: 20,
    direct: 30,
    temporary: 10
  },
  
  // Läsoperationer
  readOperation: {
    true: -80     // Läsning minskar risk avsevärt
  },
  
  // Observation
  observeOperation: {
    inventory: -100,
    plan: -100,
    validate: -100,
    'health-check': -100
  }
};

/**
 * Beräkna total vikt för en given evidensuppsättning
 */
function calculateWeightedScore(evidence) {
  let score = 0;
  const breakdown = {};
  
  for (const [key, value] of Object.entries(evidence)) {
    if (value === null || value === false || value === undefined) continue;
    
    const weights = EVIDENCE_WEIGHTS[key];
    if (!weights) continue;
    
    let weight = 0;
    
    if (typeof value === 'boolean') {
      weight = weights.true || weights[String(value)] || 0;
    } else if (typeof value === 'string') {
      weight = weights[value] || 0;
    } else if (Array.isArray(value)) {
      for (const item of value) {
        weight += weights[item] || 0;
      }
    }
    
    score += weight;
    breakdown[key] = { value, weight };
  }
  
  return { score, breakdown };
}

/**
 * Avgör operation baserat på viktad score
 */
function resolveByWeight(evidence, candidates) {
  const { score, breakdown } = calculateWeightedScore(evidence);
  
  // Hitta den kandidat som bäst matchar den viktade scoren
  let bestMatch = null;
  let bestScore = -Infinity;
  
  for (const candidate of candidates) {
    let matchScore = 0;
    
    // Basera på kandidatens konfidens
    matchScore += candidate.confidence * 100;
    
    // Justera baserat på evidens
    if (candidate.operation === 'REMOTE_PRODUCTION_ACCESS' && evidence.accessMethod) {
      matchScore += 50;
    }
    if (candidate.operation === 'MODIFY_PERSISTENT_PRODUCTION_DATA' && evidence.dataOperation) {
      matchScore += 50;
    }
    if (candidate.operation === 'MODIFY_PRODUCTION_INFRASTRUCTURE' && evidence.infraOperation) {
      matchScore += 50;
    }
    if (candidate.operation === 'PRODUCTION_RELEASE' && evidence.releaseOperation) {
      matchScore += 50;
    }
    if (candidate.operation === 'EXPOSE_OR_CREATE_SECRET' && evidence.secretPattern) {
      matchScore += 50;
    }
    
    // Markdown-filer minskar risk för data/infrastruktur-operationer
    if (evidence.fileType === 'md' || evidence.fileType === 'txt') {
      if (['MODIFY_PERSISTENT_PRODUCTION_DATA', 'MODIFY_PRODUCTION_INFRASTRUCTURE'].includes(candidate.operation)) {
        matchScore -= 100;
      }
    }
    
    if (matchScore > bestScore) {
      bestScore = matchScore;
      bestMatch = candidate;
    }
  }
  
  return { bestMatch, weightedScore: score, breakdown };
}

export { EVIDENCE_WEIGHTS, calculateWeightedScore, resolveByWeight };