const fs = require('fs');
const path = require('path');
const dir = path.join(__dirname, '..', '..', 'frontend', 'textbooks');
const files = ['geometry_10_hub.html','geometry_10_r1.html','geometry_10_r2.html','geometry_10_r3.html','geometry_10_r4.html'];

// hub footer check
const hub = fs.readFileSync(path.join(dir,'geometry_10_hub.html'),'utf8');
const footerMatch = hub.match(/<footer[\s\S]*?<\/footer>/);
console.log('HUB FOOTER:');
if (footerMatch) console.log(footerMatch[0].slice(0,400)); else console.log('  NOT FOUND');

// g3d.js usage
console.log('\\n3D ENGINE / g3d.js usage:');
for (const f of files) {
  const txt = fs.readFileSync(path.join(dir, f), 'utf8');
  const has3d = /g3d/i.test(txt);
  const hasProj = /(project|perspective|3d|threejs|three\.)/i.test(txt);
  const hasViewBox = (txt.match(/viewBox/g) || []).length;
  console.log('  ' + f + ' g3d:'+has3d+' proj/3d:'+hasProj+' viewBox count:'+hasViewBox);
}

// Structure: count §, finals, "Я прочитал" buttons
console.log('\\nSTRUCTURE:');
for (const f of files) {
  if (f.includes('hub')) continue;
  const txt = fs.readFileSync(path.join(dir, f), 'utf8');
  // sections: pattern in TOC
  const sectionIds = [];
  const re = /id:\s*['"]([^'"]+)['"]\s*,\s*num:\s*['"]([^'"]*)['"]/g;
  let mm;
  while ((mm = re.exec(txt)) !== null) sectionIds.push({id:mm[1], num:mm[2]});
  // theory blocks
  const theoryCount = (txt.match(/theory|teor|Теори/g) || []).length;
  // interactive: int1/int2/int3/int4 or class
  const intCount = (txt.match(/data-int|intCanvas|interactive/g) || []).length;
  // "Я прочитал"
  const yaProch = (txt.match(/Я прочитал/g) || []).length;
  // markRead
  const markRead = (txt.match(/markRead|markAsRead|читал/g) || []).length;
  console.log('  ' + f + ':');
  console.log('    sections in TOC:', sectionIds.map(s=>s.num+':'+s.id).join(' '));
  console.log('    theoryCount mentions:', theoryCount, 'interactive mentions:', intCount, '"Я прочитал":', yaProch);
}

// Look for slider px ranges 40..150, R=120 etc.
console.log('\\nSLIDER PIXEL CHECK (range/value hints):');
for (const f of files) {
  if (f.includes('hub')) continue;
  const txt = fs.readFileSync(path.join(dir, f), 'utf8');
  // Find input range with suspicious min/max
  const ranges = [...txt.matchAll(/<input[^>]*type=["']range["'][^>]*>/g)];
  let suspicious = 0;
  for (const r of ranges) {
    const tag = r[0];
    const min = (tag.match(/min=["']?(\d+)/)||[])[1];
    const max = (tag.match(/max=["']?(\d+)/)||[])[1];
    if (min && max) {
      const lo=+min, hi=+max;
      if ((lo>=30 && hi>=120) || (hi-lo>=60 && hi>=100)) {
        suspicious++;
        if (suspicious<=5) {
          const idx = r.index;
          const line = (txt.slice(0,idx).match(/\n/g)||[]).length+1;
          console.log('  ' + f + ' line '+line+': '+tag.slice(0,140));
        }
      }
    }
  }
  console.log('  ' + f + ': total ranges=' + ranges.length + ' suspicious(px-like)=' + suspicious);
}

// Check "px" usage near labels (R = , a =, etc.)
console.log('\\nLABEL "R=" / "a=" PATTERNS:');
for (const f of files) {
  if (f.includes('hub')) continue;
  const txt = fs.readFileSync(path.join(dir, f), 'utf8');
  // Find patterns like 'R = ${...}' or text="R = ${r}" where r might be px
  const pat = /['"`][^'"`]*\b(R|a|h|d|l|r|b|c)\s*=\s*\$\{[^}]+\}/g;
  const matches = [];
  let mm;
  while ((mm = pat.exec(txt)) !== null) {
    if (matches.length < 6) {
      const idx = mm.index;
      const line = (txt.slice(0,idx).match(/\n/g)||[]).length+1;
      matches.push({line, snip: mm[0].slice(0,80)});
    }
  }
  if (matches.length) {
    console.log('  ' + f + ':');
    for (const x of matches) console.log('    line '+x.line+': '+x.snip);
  }
}