const fs = require('fs');
const content = fs.readFileSync('temp/rich-outline-fail_57_1779015509994.txt', 'utf-8');
const marker = '========== AI 原始响应 ';
const markerIdx = content.indexOf(marker);
const headerEndIdx = content.indexOf(' ==========', markerIdx);
const aiStart = content.indexOf('\n', headerEndIdx) + 1;
const aiEnd = content.indexOf('\n\n', aiStart);
const aiResponse = content.substring(aiStart, aiEnd);

console.log('AI response length:', aiResponse.length);

// Check position 1624
const pos = 1624;
console.log('\n=== Context around pos', pos, '===');
console.log(JSON.stringify(aiResponse.substring(pos-80, pos+80)));

// Count bad patterns
const badPattern = /,{number":/g;
const matches = aiResponse.match(badPattern);
console.log('\nBad pattern count:', matches ? matches.length : 0);

// What is at position 1624?
console.log('\nChars at', pos, 'to', pos+10, ':');
for (let i = pos; i < pos+10; i++) {
  console.log('  pos', i, ':', JSON.stringify(aiResponse[i]), 'code:', aiResponse.charCodeAt(i));
}

// Try with different fix patterns
function fixMissingQuotes(jsonStr) {
  return jsonStr
    .replace(/,(\{[^"]+":)/g, function(m) { return ',{"' + m.slice(2); })
    .replace(/\{number":/g, '{"number":')
    .replace(/\{title":/g, '{"title":')
    .replace(/\{summary":/g, '{"summary":')
    .replace(/\{opening":/g, '{"opening":')
    .replace(/\{structure":/g, '{"structure":')
    .replace(/\{mustCover":/g, '{"mustCover":')
    .replace(/\{mustNotRepeat":/g, '{"mustNotRepeat":')
    .replace(/\{toneAdjustment":/g, '{"toneAdjustment":')
    .replace(/\{keyTakeaway":/g, '{"keyTakeaway":')
    .replace(/\{keyPoints":/g, '{"keyPoints":')
    .replace(/\{estimatedWords":/g, '{"estimatedWords":')
    .replace(/\{writingInstructions":/g, '{"writingInstructions":');
}

const match = aiResponse.match(/\{[\s\S]*\}/);
if (match) {
  const fixed = fixMissingQuotes(match[0]);
  try {
    const data = JSON.parse(fixed);
    console.log('\nFixed+parsed SUCCESS, chapters:', data.chapters?.length);
  } catch(e) {
    console.log('\nFixed+parsed failed:', e.message.substring(0, 100));
    const p = parseInt(e.message.match(/position (\d+)/)?.[1] || '0');
    console.log('Error at position', p);
    console.log('Context:', JSON.stringify(fixed.substring(Math.max(0,p-50), p+50)));
  }
}