#!/usr/bin/env node
// ═══════════════════════════════════════════════════════════════════════════
// Operational Truth — EOS Extension
// "Det här har faktiskt verifierats fungera i drift."
// ═══════════════════════════════════════════════════════════════════════════

/**
 * Operational Truth är en utökning av Immutable Truth och Latest Truth.
 * 
 * Immutable Truth: Kod är sanningen (Git)
 * Latest Truth: Senaste versionen är sanningen
 * Operational Truth: Det har faktiskt verifierats fungera
 * 
 * Nivåer:
 * - Observed: Fil/kod finns
 * - Validated: Funktionellt testat
 * - Operational: Verifierat i drift under realistiska förhållanden
 * 
 * Varje Operational Truth har:
 * - verified_at: När det senast verifierades
 * - valid_until: När det måste verifieras igen
 * - verifier: Vem/vad som verifierade
 */

const OPERATIONAL_TRUTH_LEVELS = {
  NONE: 0,         // Finns inte
  OBSERVED: 1,     // Filen finns
  VALIDATED: 2,    // Funktionellt testat
  OPERATIONAL: 3   // Verifierat i drift
};

const DEFAULT_VALIDITY_DAYS = {
  OBSERVED: 7,     // Observed blir stale efter 7 dagar
  VALIDATED: 30,   // Validated blir stale efter 30 dagar
  OPERATIONAL: 90  // Operational blir stale efter 90 dagar
};

/**
 * Verifiera Operational Truth för en komponent
 */
export function verifyOperationalTruth(component, checks, options = {}) {
  const now = new Date();
  const results = {
    component,
    timestamp: now.toISOString(),
    levels: {},
    overall: {
      level: OPERATIONAL_TRUTH_LEVELS.NONE,
      status: 'UNKNOWN',
      verified_at: null,
      valid_until: null,
      verifier: options.verifier || 'unknown'
    }
  };

  let minLevel = OPERATIONAL_TRUTH_LEVELS.OPERATIONAL;
  let latestVerification = null;

  for (const [check, { level, evidence, verified_at, verifier }] of Object.entries(checks)) {
    const checkVerifiedAt = verified_at ? new Date(verified_at) : now;
    const validityDays = options.validityDays || DEFAULT_VALIDITY_DAYS;
    const validUntil = new Date(checkVerifiedAt);
    validUntil.setDate(validUntil.getDate() + (validityDays[level] || 30));
    
    const isStale = now > validUntil;
    
    results.levels[check] = {
      level,
      evidence,
      verified_at: checkVerifiedAt.toISOString(),
      valid_until: validUntil.toISOString(),
      verifier: verifier || options.verifier || 'unknown',
      is_stale: isStale,
      status: isStale ? 'STALE' : (level >= OPERATIONAL_TRUTH_LEVELS.VALIDATED ? 'VALID' : 'INSUFFICIENT')
    };

    minLevel = Math.min(minLevel, level);
    if (!latestVerification || checkVerifiedAt > latestVerification) {
      latestVerification = checkVerifiedAt;
    }
  }

  // Overall är minsta nivån av alla checks
  results.overall.level = minLevel;
  results.overall.verified_at = latestVerification ? latestVerification.toISOString() : null;
  
  const overallValidUntil = new Date(latestVerification || now);
  overallValidUntil.setDate(overallValidUntil.getDate() + DEFAULT_VALIDITY_DAYS[minLevel]);
  results.overall.valid_until = overallValidUntil.toISOString();
  
  results.overall.status = minLevel >= OPERATIONAL_TRUTH_LEVELS.OPERATIONAL ? 'OPERATIONAL' :
                           minLevel >= OPERATIONAL_TRUTH_LEVELS.VALIDATED ? 'VALIDATED' :
                           minLevel >= OPERATIONAL_TRUTH_LEVELS.OBSERVED ? 'OBSERVED' : 'NONE';

  return results;
}

/**
 * Exempel: Terraform
 */
export function verifyTerraform() {
  return verifyOperationalTruth('terraform', {
    filesExist: {
      level: OPERATIONAL_TRUTH_LEVELS.OBSERVED,
      evidence: 'find *.tf returns files',
      verified_at: '2026-07-01T13:19Z',
      verifier: 'autonomous-audit'
    },
    planWorks: {
      level: OPERATIONAL_TRUTH_LEVELS.NONE,
      evidence: 'Not yet tested',
      verified_at: null,
      verifier: null
    },
    provisionsEnvironment: {
      level: OPERATIONAL_TRUTH_LEVELS.NONE,
      evidence: 'Not yet tested',
      verified_at: null,
      verifier: null
    }
  });
}

/**
 * Exempel: Rollback
 */
export function verifyRollback() {
  return verifyOperationalTruth('rollback', {
    scriptExists: {
      level: OPERATIONAL_TRUTH_LEVELS.OBSERVED,
      evidence: 'Rollback script exists',
      verified_at: '2026-07-01T13:19Z',
      verifier: 'autonomous-audit'
    },
    syntaxValid: {
      level: OPERATIONAL_TRUTH_LEVELS.NONE,
      evidence: 'Not yet tested',
      verified_at: null,
      verifier: null
    },
    testedInStaging: {
      level: OPERATIONAL_TRUTH_LEVELS.NONE,
      evidence: 'Not yet tested',
      verified_at: null,
      verifier: null
    }
  });
}

/**
 * Exempel: EOS Blocker
 */
export function verifyEOSBlocker() {
  return verifyOperationalTruth('eos-blocker', {
    codeExists: {
      level: OPERATIONAL_TRUTH_LEVELS.OBSERVED,
      evidence: 'engineering-contract.mjs exists',
      verified_at: '2026-07-01T13:19Z',
      verifier: 'autonomous-audit'
    },
    integrationTested: {
      level: OPERATIONAL_TRUTH_LEVELS.NONE,
      evidence: 'Not yet tested',
      verified_at: null,
      verifier: null
    },
    blockedRealDeployment: {
      level: OPERATIONAL_TRUTH_LEVELS.NONE,
      evidence: 'Not yet tested',
      verified_at: null,
      verifier: null
    }
  });
}

// CLI
if (process.argv[1] === new URL(import.meta.url).pathname) {
  console.log('Terraform:', JSON.stringify(verifyTerraform(), null, 2));
  console.log('Rollback:', JSON.stringify(verifyRollback(), null, 2));
  console.log('EOS Blocker:', JSON.stringify(verifyEOSBlocker(), null, 2));
}