const fs = require('fs');
const path = require('path');

function extractBlocks(content) {
  // Find occurrences like 'Key': { ... corePatterns: [ ... ] ... }
  const re = /['"]([^'"]+)['"]\s*:\s*\{([\s\S]*?)\n\s*\}/g;
  const blocks = {};
  let m;
  while ((m = re.exec(content))) {
    blocks[m[1]] = m[2];
  }
  return blocks;
}

function countCorePatternsInBlock(blockText) {
  const cpRe = /corePatterns\s*:\s*\[([\s\S]*?)\]/g;
  let m = cpRe.exec(blockText);
  if (!m) return 0;
  const arrText = m[1];
  const targetRe = /\btarget\s*:/g;
  return (arrText.match(targetRe) || []).length;
}

function parseDidacticsFile(filePath) {
  const content = fs.readFileSync(filePath, 'utf8');
  const blocks = extractBlocks(content);
  const counts = {};
  let total = 0;
  for (const [k, v] of Object.entries(blocks)) {
    const c = countCorePatternsInBlock(v);
    if (c > 0) {
      counts[k] = c;
      total += c;
    }
  }
  return { counts, total };
}

function extractLessonArray(content, varName) {
  // crude: find 'const VAR = [' up to closing '];'
  const re = new RegExp(varName.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&') + "\\s*=\\s*\\[([\\s\\S]*?)\\];", 'm');
  const m = re.exec(content);
  if (!m) return null;
  return m[1];
}

function countExamLessonsFromArrayText(arrayText) {
  // Count objects with type:'review' or title containing checkpoint/test/abschluss (case-insensitive)
  const objRe = /\{([\s\S]*?)\}(?=\s*,|$)/g;
  let m;
  let examCount = 0;
  let total = 0;
  while ((m = objRe.exec(arrayText))) {
    total++;
    const obj = m[1];
    const typeMatch = /type\s*:\s*['"](\w+)['"]/.exec(obj);
    const titleMatch = /title\s*:\s*['"]([\s\S]*?)['"]/.exec(obj);
    const type = typeMatch ? typeMatch[1] : '';
    const title = titleMatch ? titleMatch[1].toLowerCase() : '';
    if (type === 'review' || /checkpoint|test|abschluss|prüfung|check/i.test(title)) {
      examCount++;
    }
  }
  return { examCount, total };
}

function analyze() {
  const repoRoot = path.join(__dirname);
  const file1 = path.join(repoRoot, 'bisaya-course-plan-24-43.js');
  const file2 = path.join(repoRoot, 'bisaya-course-phase3-extension.js');

  const res1 = parseDidacticsFile(file1);
  const res2 = parseDidacticsFile(file2);

  const f1 = fs.readFileSync(file1, 'utf8');
  const f2 = fs.readFileSync(file2, 'utf8');

  const arr1Text = extractLessonArray(f1, 'const BISAYA_LESSONS_24_43_BASE') || extractLessonArray(f1, 'BISAYA_LESSONS_24_43') || extractLessonArray(f1, 'BISAYA_LESSONS_24_43_BASE =');
  const arr2Text = extractLessonArray(f2, 'export const BISAYA_PHASE3_LESSONS') || extractLessonArray(f2, 'BISAYA_PHASE3_LESSONS');

  const a1 = arr1Text ? countExamLessonsFromArrayText(arr1Text) : { examCount: 0, total: 0 };
  const a2 = arr2Text ? countExamLessonsFromArrayText(arr2Text) : { examCount: 0, total: 0 };

  console.log('--- BISAYA 24-43 didactics corePatterns per key ---');
  Object.entries(res1.counts).sort((a,b)=>b[1]-a[1]).forEach(([k,v])=>console.log(`${k}: ${v}`));
  console.log(`Total corePatterns (24-43 files): ${res1.total}`);
  console.log(`Lessons parsed in array (approx): ${a1.total}, exam-like lessons (type=review or title contains checkpoint/test/abschluss): ${a1.examCount}`);

  console.log('\n--- BISAYA Phase3 didactics corePatterns per key ---');
  Object.entries(res2.counts).sort((a,b)=>b[1]-a[1]).forEach(([k,v])=>console.log(`${k}: ${v}`));
  console.log(`Total corePatterns (phase3 file): ${res2.total}`);
  console.log(`Lessons parsed in phase3 array (approx): ${a2.total}, exam-like lessons: ${a2.examCount}`);
}

analyze();