#!/usr/bin/env node
// ═══════════════════════════════════════════════════════════════════════════
// SIL Validation — Fråga 3: Hur robust är SIL mot förändring?
// Simulerar refactoring och mäter degradation
// ═══════════════════════════════════════════════════════════════════════════

import { execSync } from 'child_process';
import { readFileSync, writeFileSync, existsSync, mkdirSync } from 'fs';
import { createHash } from 'crypto';

const TEST_DIR = '/home/bernt/.openclaw/workspace/SIL/validation/robustness-tests';
const RESULTS_LOG = '/home/bernt/.openclaw/workspace/SIL/validation/robustness-results.jsonl';

class RobustnessTester {
  constructor(repoPath) {
    this.repoPath = repoPath;
    if (!existsSync(TEST_DIR)) {
      mkdirSync(TEST_DIR, { recursive: true });
    }
  }

  /**
   * Kör alla robusthetstester
   */
  runAllTests() {
    console.log('🧪 Kör robusthetstester...\n');

    const tests = [
      { name: 'rename_service', fn: this.testRenameService.bind(this) },
      { name: 'move_code', fn: this.testMoveCode.bind(this) },
      { name: 'split_module', fn: this.testSplitModule.bind(this) },
      { name: 'add_dependency', fn: this.testAddDependency.bind(this) },
      { name: 'change_structure', fn: this.testChangeStructure.bind(this) },
      { name: 'introduce_violation', fn: this.testIntroduceViolation.bind(this) }
    ];

    const results = [];

    for (const test of tests) {
      console.log(`🔍 ${test.name}...`);
      try {
        const result = test.fn();
        results.push({ name: test.name, ...result });
        console.log(`   ${result.passed ? '✅' : '❌'} Degradation: ${result.degradation}`);
      } catch (e) {
        results.push({ name: test.name, error: e.message, passed: false });
        console.log(`   ❌ Fel: ${e.message}`);
      }
    }

    const report = this.generateReport(results);
    this.saveResults(results);
    this.printReport(report);

    return report;
  }

  /**
   * Test 1: Byt namn på en tjänst
   */
  testRenameService() {
    // Simulera: byt namn på "wallet" till "payment"
    const before = this.runAnalysis();

    // Simulerad förändring: ändra i grafen
    const modifiedGraph = this.simulateRename('wallet', 'payment');

    const after = this.runAnalysisWithGraph(modifiedGraph);

    return this.compareResults(before, after, 'rename_service');
  }

  /**
   * Test 2: Flytta kod mellan paket
   */
  testMoveCode() {
    const before = this.runAnalysis();

    // Simulera: flytta auth-kod till nytt paket
    const modifiedGraph = this.simulateMove('auth', 'auth-v2');

    const after = this.runAnalysisWithGraph(modifiedGraph);

    return this.compareResults(before, after, 'move_code');
  }

  /**
   * Test 3: Dela upp modul
   */
  testSplitModule() {
    const before = this.runAnalysis();

    // Simulera: dela upp mission i mission-core och mission-api
    const modifiedGraph = this.simulateSplit('mission', ['mission-core', 'mission-api']);

    const after = this.runAnalysisWithGraph(modifiedGraph);

    return this.compareResults(before, after, 'split_module');
  }

  /**
   * Test 4: Lägg till nytt beroende
   */
  testAddDependency() {
    const before = this.runAnalysis();

    // Simulera: lägg till Redis-beroende
    const modifiedGraph = this.simulateAddDependency('wallet', 'redis');

    const after = this.runAnalysisWithGraph(modifiedGraph);

    return this.compareResults(before, after, 'add_dependency');
  }

  /**
   * Test 5: Ändra katalogstruktur
   */
  testChangeStructure() {
    const before = this.runAnalysis();

    // Simulera: flytta alla services till src/services/
    const modifiedGraph = this.simulateRestructure();

    const after = this.runAnalysisWithGraph(modifiedGraph);

    return this.compareResults(before, after, 'change_structure');
  }

  /**
   * Test 6: Introducera avsiktlig arkitekturavvikelse
   */
  testIntroduceViolation() {
    const before = this.runAnalysis();

    // Simulera: lägg till direkt DB-anrop i UI
    const modifiedGraph = this.simulateViolation();

    const after = this.runAnalysisWithGraph(modifiedGraph);

    return this.compareResults(before, after, 'introduce_violation');
  }

  // ── Simuleringar ────────────────────────────────────────────────────────

  simulateRename(oldName, newName) {
    const graph = this.loadGraph();

    // Byt namn på noder
    for (const node of graph.nodes) {
      if (node.id === oldName) {
        node.id = newName;
        node.label = newName;
      }
    }

    // Uppdatera kanter
    for (const edge of graph.edges) {
      if (edge.from === oldName) edge.from = newName;
      if (edge.to === oldName) edge.to = newName;
    }

    return graph;
  }

  simulateMove(oldLocation, newLocation) {
    const graph = this.loadGraph();

    // Lägg till ny nod
    graph.nodes.push({
      id: newLocation,
      label: newLocation,
      type: 'service'
    });

    // Flytta kanter
    for (const edge of graph.edges) {
      if (edge.from === oldLocation) {
        edge.from = newLocation;
      }
    }

    return graph;
  }

  simulateSplit(moduleName, newModules) {
    const graph = this.loadGraph();

    // Ta bort gammal nod
    graph.nodes = graph.nodes.filter(n => n.id !== moduleName);

    // Lägg till nya noder
    for (const mod of newModules) {
      graph.nodes.push({
        id: mod,
        label: mod,
        type: 'service'
      });
    }

    // Uppdatera kanter
    for (const edge of graph.edges) {
      if (edge.from === moduleName) edge.from = newModules[0];
      if (edge.to === moduleName) edge.to = newModules[0];
    }

    return graph;
  }

  simulateAddDependency(from, to) {
    const graph = this.loadGraph();

    graph.edges.push({
      from,
      to,
      relation: 'depends_on',
      confidence: 0.8
    });

    return graph;
  }

  simulateRestructure() {
    const graph = this.loadGraph();

    // Simulera att alla services får nytt prefix
    for (const node of graph.nodes) {
      if (node.type === 'service') {
        node.id = `src/services/${node.id}`;
      }
    }

    return graph;
  }

  simulateViolation() {
    const graph = this.loadGraph();

    // Lägg till en förbjuden kant: UI → DB
    graph.edges.push({
      from: 'app',
      to: 'database',
      relation: 'direct_access',
      confidence: 0.99
    });

    return graph;
  }

  // ── Analys ──────────────────────────────────────────────────────────────

  runAnalysis() {
    try {
      const output = execSync(
        `node /home/bernt/.openclaw/workspace/SIL/pr-analyzer.mjs ${this.repoPath} HEAD~1 HEAD 2>&1`,
        { encoding: 'utf8', maxBuffer: 10 * 1024 * 1024 }
      );
      return this.parseAnalysis(output);
    } catch (e) {
      return { error: e.message };
    }
  }

  runAnalysisWithGraph(graph) {
    // Spara temporär graf
    const tempPath = `${TEST_DIR}/temp-graph.json`;
    writeFileSync(tempPath, JSON.stringify(graph));

    try {
      const output = execSync(
        `node /home/bernt/.openclaw/workspace/SIL/pr-analyzer.mjs ${this.repoPath} HEAD~1 HEAD 2>&1`,
        { encoding: 'utf8', maxBuffer: 10 * 1024 * 1024 }
      );
      return this.parseAnalysis(output);
    } catch (e) {
      return { error: e.message };
    }
  }

  parseAnalysis(output) {
    // Extrahera nyckeldata från output
    const components = [];
    const lines = output.split('\n');

    for (const line of lines) {
      const match = line.match(/✅\s+(.+)/);
      if (match && !line.includes('Körning')) {
        components.push(match[1].trim());
      }
    }

    return { components };
  }

  loadGraph() {
    try {
      return JSON.parse(readFileSync('/home/bernt/.openclaw/workspace/SYSTEM_GRAPH.json', 'utf8'));
    } catch {
      return { nodes: [], edges: [] };
    }
  }

  // ── Jämförelse ──────────────────────────────────────────────────────────

  compareResults(before, after, testName) {
    if (before.error || after.error) {
      return {
        testName,
        passed: false,
        degradation: '100%',
        reason: before.error || after.error
      };
    }

    const beforeComponents = new Set(before.components || []);
    const afterComponents = new Set(after.components || []);

    const intersection = [...beforeComponents].filter(c => afterComponents.has(c));
    const union = new Set([...beforeComponents, ...afterComponents]);

    const similarity = union.size > 0 ? intersection.length / union.size : 1;
    const degradation = Math.round((1 - similarity) * 100) + '%';

    return {
      testName,
      passed: similarity >= 0.9, // Max 10% degradation
      degradation,
      similarity: Math.round(similarity * 100) + '%',
      before: before.components?.length || 0,
      after: after.components?.length || 0
    };
  }

  // ── Rapport ─────────────────────────────────────────────────────────────

  generateReport(results) {
    const passed = results.filter(r => r.passed).length;
    const total = results.length;

    const avgDegradation = results
      .filter(r => !r.error)
      .reduce((a, r) => a + parseFloat(r.degradation), 0) / total;

    return {
      timestamp: new Date().toISOString(),
      totalTests: total,
      passed,
      failed: total - passed,
      avgDegradation: Math.round(avgDegradation) + '%',
      meetsCriteria: avgDegradation < 10,
      results
    };
  }

  printReport(report) {
    console.log('\n╔═══════════════════════════════════════════════════════════════╗');
    console.log('║           VALIDATION: FRÅGA 3                                 ║');
    console.log('║           Hur robust är SIL mot förändring?                   ║');
    console.log('╚═══════════════════════════════════════════════════════════════╝');
    console.log();

    console.log('📊 RESULTAT\n');
    console.log(`   Tester: ${report.totalTests}`);
    console.log(`   Godkända: ${report.passed} ✅`);
    console.log(`   Misslyckade: ${report.failed} ❌`);
    console.log(`   Genomsnittlig degradation: ${report.avgDegradation}`);
    console.log();

    console.log('📋 PER TEST\n');
    for (const result of report.results) {
      const icon = result.passed ? '✅' : '❌';
      console.log(`   ${icon} ${result.testName}`);
      console.log(`      Degradation: ${result.degradation}`);
      console.log(`      Similarity: ${result.similarity || 'N/A'}`);
      if (result.reason) {
        console.log(`      Fel: ${result.reason}`);
      }
    }
    console.log();

    console.log('🎯 SUCCESS-KRITERIUM\n');
    console.log(`   Krav: <10% degradation vid refactoring`);
    console.log(`   Resultat: ${report.avgDegradation}`);
    console.log(`   ${report.meetsCriteria ? '✅ UPPFYLLT' : '❌ EJ UPPFYLLT'}`);
    console.log();

    console.log('═══════════════════════════════════════════════════════════════\n');
  }

  saveResults(results) {
    for (const result of results) {
      writeFileSync(RESULTS_LOG, JSON.stringify(result) + '\n', { flag: 'a' });
    }
  }
}

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

const repoPath = process.argv[2] || '/home/bernt/repos/quixzoom.com';
const tester = new RobustnessTester(repoPath);

tester.runAllTests();