import { BISAYA_LESSONS_24_43_BY_NUMBER, BISAYA_DIDACTICS_24_43 } from './bisaya-course-plan-24-43.js';
import { BISAYA_PHASE3_LESSONS, BISAYA_PHASE3_DIDACTICS } from './bisaya-course-phase3-extension.js';

// Build lesson->patterns for 24..63 using available didactics
const lessonPatterns = {};
for (let n = 24; n <= 63; n++) {
  const lesson = BISAYA_LESSONS_24_43_BY_NUMBER[n] || (BISAYA_PHASE3_LESSONS && BISAYA_PHASE3_LESSONS.find(l=>l.num===n));
  if (!lesson) continue;
  const title = lesson.title;
  let didactic = BISAYA_DIDACTICS_24_43[title] || (BISAYA_PHASE3_DIDACTICS && BISAYA_PHASE3_DIDACTICS[title]);
  if (!didactic) continue;
  const pats = (didactic.corePatterns || []).map(p => typeof p === 'string' ? p : p.target).filter(Boolean).map(s=>s.trim());
  lessonPatterns[n] = pats;
}

// Build reverse map from pattern -> list of lessons
const patternMap = {};
for (const [n, pats] of Object.entries(lessonPatterns)) {
  for (const p of pats) {
    patternMap[p] = patternMap[p] || [];
    patternMap[p].push(Number(n));
  }
}

// For lesson 26, list patterns that also appear in lessons <26
const dupes = [];
const pats26 = lessonPatterns[26] || [];
for (const p of pats26) {
  const appears = patternMap[p] || [];
  const earlier = appears.filter(x=>x < 26);
  if (earlier.length) dupes.push({pattern: p, earlier});
}

console.log('Patterns in lesson 26 that also appear in earlier lessons:');
if (dupes.length === 0) console.log('  (none)');
for (const d of dupes) console.log(`  - ${d.pattern}  (also in lessons: ${d.earlier.join(', ')})`);

// Also list patterns in lesson 24-26 that are duplicates across 24-26
console.log('\nPatterns repeated within 24..26:');
const localMap = {};
for (let n=24;n<=26;n++){ (lessonPatterns[n]||[]).forEach(p=>{ localMap[p]=localMap[p]||[]; localMap[p].push(n); }); }
for (const [p, arr] of Object.entries(localMap)) if (arr.length>1) console.log(`  - ${p}: in lessons ${arr.join(', ')}`);