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);

// Verify the issue with a minimal fix function
// The issue with my previous fix was: using a function in replace causes issues
// Let's do simple string replacement

const input = 'Hello {world": test';
const output = input.replace("{world":/, '{"world":');
console.log('Simple replacement test:');
console.log('Input:', JSON.stringify(input));
console.log('Output:', JSON.stringify(output));

// Now let's just check if the JSON has any obvious issues by
// checking if ALL property names are properly quoted

let inString = false;
let escapeNext = false;
let braceLevel = 0;
let bracketLevel = 0;
let issues = [];

for (let i = 0; i < aiResponse.length; i++) {
  const ch = aiResponse[i];
  if (escapeNext) { escapeNext = false; continue; }
  if (ch === '\\') { escapeNext = true; continue; }
  if (ch === '"') { inString = !inString; continue; }
  if (!inString) {
    if (ch === '{') {
      braceLevel++;
      // Check the next non-space character
      let j = i + 1;
      while (j < aiResponse.length && aiResponse[j] === ' ') j++;
      if (j < aiResponse.length && aiResponse[j] !== '"' && aiResponse[j] !== '}') {
        issues.push({pos: i, char: ch, nextChar: aiResponse[j], context: aiResponse.substring(Math.max(0,i-20), i+30)});
      }
    } else if (ch === '}') {
      braceLevel--;
    } else if (ch === '[') {
      bracketLevel++;
    } else if (ch === ']') {
      bracketLevel--;
    }
  }
}

console.log('\nIssues found:');
issues.slice(0, 10).forEach(issue => {
  console.log('  pos', issue.pos, ': char', JSON.stringify(issue.char), 'next', JSON.stringify(issue.nextChar));
  console.log('    context:', JSON.stringify(issue.context));
});

// Try a completely different approach - use a streaming JSON parser to find the error
console.log('\n=== Trying to find exact error location ===');
// Let's manually find the last COMPLETE property before position 1624
const before1624 = aiResponse.substring(0, 1624);
console.log('Last 200 chars before position 1624:');
console.log(JSON.stringify(before1624.substring(before1624.length - 200)));

// Let's check if maybe the issue is a TRUNCATION - the JSON ends in the middle of a string
console.log('\n=== Checking for truncation ===');
console.log('Ends with }:', aiResponse.trim().endsWith('}'));
console.log('Ends with ,:', aiResponse.trim().endsWith(','));

const lastComma = before1624.lastIndexOf(',');
const lastBrace = before1624.lastIndexOf('}');
const lastBracket = before1624.lastIndexOf(']');
console.log('Last comma before 1624:', lastComma, '=', JSON.stringify(before1624[lastComma]));
console.log('Last brace before 1624:', lastBrace);
console.log('Last bracket before 1624:', lastBracket);