#!/usr/bin/env node
// ═══════════════════════════════════════════════════════════════════════════
// EOS Policy Enforcement — Förhindra åtgärder, inte bara logga
// Erik-krav: "Om en agent försöker deploya utan pipeline ska EOS förhindra åtgärden"
// ═══════════════════════════════════════════════════════════════════════════

import { execSync } from 'child_process';
import { existsSync, appendFileSync } from 'fs';

const ENFORCEMENT_LOG = '/home/bernt/.openclaw/workspace/EOS/enforcement-log.jsonl';

/**
 * Verkställbara policyer — dessa förhindrar åtgärder
 */
const POLICIES = [
  {
    id: 'block-direct-prod',
    name: 'Blockera direkt skrivning till produktion',
    check: (action) => {
      // Kontrollera om vi är på produktionsserver
      const isProd = process.env.NODE_ENV === 'production' ||
                    existsSync('/etc/ec2-release');
      const isWrite = action.type === 'write' || action.type === 'deploy';

      return {
        allowed: !(isProd && isWrite),
        reason: isProd && isWrite ? 'Direkt skrivning till produktion blockerad' : null
      };
    }
  },
  {
    id: 'block-no-pipeline-deploy',
    name: 'Blockera deployment utan pipeline',
    check: (action) => {
      if (action.type !== 'deploy') return { allowed: true };

      const hasPipeline = existsSync('/home/bernt/repos/quixzoom.com/.github/workflows') ||
                         existsSync('/home/bernt/repos/quixzoom.com/.gitlab-ci.yml');

      return {
        allowed: hasPipeline,
        reason: hasPipeline ? null : 'Deployment utan CI/CD pipeline blockerad'
      };
    }
  },
  {
    id: 'block-server-edit',
    name: 'Blockera redigering på server',
    check: (action) => {
      const isServer = existsSync('/etc/ec2-release') || existsSync('/var/lib/cloud');
      const isEdit = action.type === 'edit' || action.type === 'write';

      return {
        allowed: !(isServer && isEdit),
        reason: isServer && isEdit ? 'Redigering på server blockerad' : null
      };
    }
  },
  {
    id: 'block-uncommitted',
    name: 'Blockera ändring utan commit',
    check: (action) => {
      if (action.type !== 'commit' && action.type !== 'write') return { allowed: true };

      try {
        const status = execSync('git status --short', {
          cwd: '/home/bernt/repos/quixzoom.com',
          encoding: 'utf8'
        });
        const hasUncommitted = status.trim().length > 0;

        // Tillåt commit-action även med ocommitade filer (det är poängen)
        if (action.type === 'commit') return { allowed: true };

        return {
          allowed: !hasUncommitted,
          reason: hasUncommitted ? 'Ocommitade ändringar finns — commita först' : null
        };
      } catch {
        return { allowed: false, reason: 'Kunde inte verifiera git-status' };
      }
    }
  },
  {
    id: 'block-no-migration',
    name: 'Blockera databasändring utan migration',
    check: (action) => {
      if (!action.target?.match(/database|db|sql/i)) return { allowed: true };

      const hasMigration = existsSync('/home/bernt/repos/quixzoom.com/migrations') ||
                          existsSync('/home/bernt/repos/quixzoom.com/prisma');

      return {
        allowed: hasMigration,
        reason: hasMigration ? null : 'Databasändring utan migration blockerad'
      };
    }
  },
  {
    id: 'block-no-api-contract',
    name: 'Blockera API-ändring utan kontrakt',
    check: (action) => {
      if (!action.target?.match(/api|endpoint|route/i)) return { allowed: true };

      const hasContract = existsSync('/home/bernt/repos/quixzoom.com/openapi.yaml') ||
                         existsSync('/home/bernt/repos/quixzoom.com/openapi.json');

      return {
        allowed: hasContract,
        reason: hasContract ? null : 'API-ändring utan kontrakt blockerad'
      };
    }
  },
  {
    id: 'require-human-approval',
    name: 'Kräv mänskligt godkännande för kritiska åtgärder',
    check: (action) => {
      const criticalActions = ['delete', 'drop', 'destroy', 'remove'];
      const isCritical = criticalActions.some(a => action.type?.includes(a));

      return {
        allowed: !isCritical,
        reason: isCritical ? 'KRITISK ÅTGÄRD — Kräver mänskligt godkännande' : null,
        requiresApproval: isCritical
      };
    }
  }
];

class PolicyEnforcement {
  constructor() {
    this.policies = POLICIES;
  }

  /**
   * Validera en åtgärd mot alla policyer
   */
  validateAction(action) {
    console.log(`🔍 Validerar åtgärd: ${action.type} ${action.target || ''}\n`);

    const violations = [];
    let requiresApproval = false;

    for (const policy of this.policies) {
      const result = policy.check(action);

      if (!result.allowed) {
        violations.push({
          policy: policy.id,
          name: policy.name,
          reason: result.reason
        });

        this.logEnforcement({
          action,
          policy: policy.id,
          allowed: false,
          reason: result.reason,
          timestamp: new Date().toISOString()
        });
      }

      if (result.requiresApproval) {
        requiresApproval = true;
      }
    }

    const result = {
      action,
      allowed: violations.length === 0,
      violations,
      requiresApproval,
      timestamp: new Date().toISOString()
    };

    this.printResult(result);
    return result;
  }

  /**
   * Försök utföra en åtgärd (med policy-kontroll)
   */
  executeAction(action) {
    const validation = this.validateAction(action);

    if (!validation.allowed) {
      console.log('🔴 ÅTGÄRD BLOCKERAD\n');
      for (const v of validation.violations) {
        console.log(`   ${v.name}`);
        console.log(`   ${v.reason}`);
      }
      console.log();
      return { executed: false, validation };
    }

    if (validation.requiresApproval) {
      console.log('🟡 ÅTGÄRD KRÄVER GODKÄNNANDE\n');
      console.log('   Väntar på mänskligt godkännande...\n');
      return { executed: false, pendingApproval: true, validation };
    }

    console.log('✅ ÅTGÄRD GODKÄND\n');
    return { executed: true, validation };
  }

  logEnforcement(entry) {
    appendFileSync(ENFORCEMENT_LOG, JSON.stringify(entry) + '\n', 'utf8');
  }

  printResult(result) {
    if (result.allowed && !result.requiresApproval) {
      console.log(`✅ ${result.action.type} — Godkänd`);
    } else if (result.requiresApproval) {
      console.log(`🟡 ${result.action.type} — Kräver godkännande`);
    } else {
      console.log(`🔴 ${result.action.type} — Blockerad`);
    }
  }

  /**
   * Visa policyer
   */
  listPolicies() {
    console.log('📋 POLICYER\n');
    for (const policy of this.policies) {
      console.log(`   ${policy.name}`);
      console.log(`   ID: ${policy.id}`);
      console.log();
    }
  }

  /**
   * Visa enforcement-logg
   */
  showLog() {
    if (!existsSync(ENFORCEMENT_LOG)) {
      console.log('Ingen enforcement-logg hittad\n');
      return;
    }

    const entries = readFileSync(ENFORCEMENT_LOG, 'utf8')
      .split('\n')
      .filter(line => line.trim())
      .map(line => {
        try { return JSON.parse(line); } catch { return null; }
      })
      .filter(Boolean);

    console.log(`📊 ENFORCEMENT-LOGG (${entries.length} entries)\n`);

    const blocked = entries.filter(e => !e.allowed);
    console.log(`   Blockerade: ${blocked.length}`);
    console.log(`   Godkända: ${entries.length - blocked.length}`);
    console.log();

    for (const entry of entries.slice(-10)) {
      const icon = entry.allowed ? '✅' : '🔴';
      console.log(`   ${icon} ${entry.action.type} ${entry.action.target || ''}`);
      if (entry.reason) {
        console.log(`      ${entry.reason}`);
      }
    }
    console.log();
  }
}

// ── Main ──────────────────────────────────────────────────────────────────

const enforcement = new PolicyEnforcement();
const command = process.argv[2] || '--list';

if (command === '--list') {
  enforcement.listPolicies();
} else if (command === '--validate') {
  const action = {
    type: process.argv[3] || 'deploy',
    target: process.argv[4] || 'production'
  };
  enforcement.validateAction(action);
} else if (command === '--execute') {
  const action = {
    type: process.argv[3] || 'deploy',
    target: process.argv[4] || 'production'
  };
  enforcement.executeAction(action);
} else if (command === '--log') {
  enforcement.showLog();
} else {
  console.log('Användning:');
  console.log('  node policy-enforcement.mjs --list                    # Lista policyer');
  console.log('  node policy-enforcement.mjs --validate <type> [target] # Validera åtgärd');
  console.log('  node policy-enforcement.mjs --execute <type> [target]  # Utför med kontroll');
  console.log('  node policy-enforcement.mjs --log                     # Visa logg');
}