/**
 * Resequence cards in documents for better pedagogical flow
 *
 * Pedagogical principles:
 * 1. Conceptual foundation FIRST (context setting)
 * 2. Critical constraints EARLY (understand boundaries)
 * 3. Technical details MIDDLE (implementation)
 * 4. Practical examples LATE (application)
 * 5. Reference material LAST (lookup info)
 */
const { MongoClient } = require('mongodb');

// Define pedagogical ordering by document category
const ORDERING_STRATEGIES = {
  'getting-started': {
    name: 'Introduction/Tutorial Flow',
    order: ['conceptual', 'critical', 'practical', 'technical', 'reference'],
    description: 'Start with concepts, warn early, show examples, then technical details'
  },
  'research-theory': {
    name: 'Research Paper Flow',
    order: ['critical', 'conceptual', 'technical', 'practical', 'reference'],
    description: 'Problem first, theory second, analysis third'
  },
  'technical-reference': {
    name: 'Technical Documentation Flow',
    order: ['conceptual', 'technical', 'practical', 'critical', 'reference'],
    description: 'Overview, details, examples, edge cases, reference'
  },
  'advanced-topics': {
    name: 'Advanced Concepts Flow',
    order: ['critical', 'conceptual', 'technical', 'practical', 'reference'],
    description: 'Warnings first, theory, implementation, applications'
  },
  'business-leadership': {
    name: 'Business Case Flow',
    order: ['conceptual', 'critical', 'practical', 'technical', 'reference'],
    description: 'Vision, constraints, use cases, implementation, details'
  }
};

/**
 * Resequence sections for better pedagogical flow
 */
function resequenceSections(sections, strategy) {
  if (!sections || sections.length === 0) return sections;

  const order = ORDERING_STRATEGIES[strategy]?.order || ORDERING_STRATEGIES['getting-started'].order;

  // Create priority map
  const priorityMap = {};
  order.forEach((category, idx) => {
    priorityMap[category] = idx;
  });

  // Sort by category priority, then by original order within category
  const resequenced = [...sections].sort((a, b) => {
    const priorityA = priorityMap[a.category] ?? 999;
    const priorityB = priorityMap[b.category] ?? 999;

    if (priorityA !== priorityB) {
      return priorityA - priorityB;
    }

    // Within same category, maintain original order
    return a.number - b.number;
  });

  // Renumber
  resequenced.forEach((section, idx) => {
    section.number = idx + 1;
  });

  return resequenced;
}

/**
 * Analyze sequence improvement
 */
function analyzeImprovement(originalSections, resequencedSections) {
  const originalSeq = originalSections.map(s => s.category);
  const resequencedSeq = resequencedSections.map(s => s.category);

  // Calculate jumpiness
  const calculateJumpiness = (seq) => {
    let changes = 0;
    for (let i = 1; i < seq.length; i++) {
      if (seq[i] !== seq[i-1]) changes++;
    }
    return Math.round((changes / (seq.length - 1)) * 100);
  };

  const originalJumpiness = calculateJumpiness(originalSeq);
  const resequencedJumpiness = calculateJumpiness(resequencedSeq);

  return {
    originalJumpiness,
    resequencedJumpiness,
    improvement: originalJumpiness - resequencedJumpiness,
    originalSeq,
    resequencedSeq
  };
}

async function run() {
  const args = process.argv.slice(2);
  const dryRun = !args.includes('--apply');

  const client = new MongoClient('mongodb://localhost:27017');
  await client.connect();

  const db = client.db('tractatus_dev');
  const collection = db.collection('documents');

  console.log('═══════════════════════════════════════════════════════════');
  console.log('  RESEQUENCING CARDS FOR PEDAGOGICAL FLOW');
  console.log('═══════════════════════════════════════════════════════════\n');

  if (dryRun) {
    console.log('🔍 DRY RUN MODE - No changes will be saved');
    console.log('   Add --apply to commit changes\n');
  } else {
    console.log('✍️  APPLY MODE - Changes will be saved to database\n');
  }

  const PUBLIC_SLUGS = [
    'introduction', 'core-concepts', 'executive-summary-tractatus-inflection-point',
    'implementation-guide-v1.1', 'implementation-guide', 'implementation-guide-python-examples',
    'tractatus-framework-research', 'pluralistic-values-research-foundations',
    'the-27027-incident-a-case-study-in-pattern-recognition-bias',
    'real-world-ai-governance-a-case-study-in-framework-failure-and-recovery',
    'llm-integration-feasibility-research-scope',
    'research-topic-concurrent-session-architecture',
    'research-topic-rule-proliferation-transactional-overhead',
    'technical-architecture', 'api-reference-complete', 'api-javascript-examples',
    'api-python-examples', 'openapi-specification',
    'value-pluralism-faq', 'tractatus-ai-safety-framework-core-values-and-principles',
    'organizational-theory-foundations', 'business-case-tractatus-framework'
  ];

  let updatedCount = 0;
  let improvedCount = 0;

  for (const slug of PUBLIC_SLUGS) {
    const doc = await collection.findOne({ slug });

    if (!doc || !doc.sections || doc.sections.length === 0) {
      continue;
    }

    const strategy = doc.category || 'getting-started';
    const strategyInfo = ORDERING_STRATEGIES[strategy] || ORDERING_STRATEGIES['getting-started'];

    console.log(`\n📄 ${doc.title}`);
    console.log(`   Strategy: ${strategyInfo.name}`);
    console.log(`   ${strategyInfo.description}`);

    const originalSections = [...doc.sections];
    const resequencedSections = resequenceSections(doc.sections, strategy);

    const analysis = analyzeImprovement(originalSections, resequencedSections);

    console.log(`\n   Original sequence:`);
    const ICONS = { conceptual: '📘', technical: '🔧', practical: '💡', reference: '📋', critical: '⚠️' };
    console.log(`   ${analysis.originalSeq.map(c => ICONS[c] || '❓').join(' ')}`);
    console.log(`   Jumpiness: ${analysis.originalJumpiness}%`);

    console.log(`\n   Resequenced:`);
    console.log(`   ${analysis.resequencedSeq.map(c => ICONS[c] || '❓').join(' ')}`);
    console.log(`   Jumpiness: ${analysis.resequencedJumpiness}%`);

    if (analysis.improvement > 0) {
      console.log(`\n   ✅ Improvement: ${analysis.improvement}% reduction in jumpiness`);
      improvedCount++;

      if (!dryRun) {
        await collection.updateOne(
          { slug },
          {
            $set: {
              sections: resequencedSections,
              updated_at: new Date()
            }
          }
        );
        console.log(`   💾 Saved to database`);
        updatedCount++;
      }
    } else {
      console.log(`\n   ℹ️  No significant improvement needed`);
    }
  }

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

  console.log(`Documents analyzed: ${PUBLIC_SLUGS.length}`);
  console.log(`Documents improved: ${improvedCount}`);

  if (dryRun) {
    console.log(`\n💡 Run with --apply to save changes`);
  } else {
    console.log(`\n✅ Documents updated: ${updatedCount}`);
  }

  await client.close();
}

run().catch(console.error);