// ============================================================
// CORRECTION TRACKER — Dragon-like AI learning from user edits
// Tracks when users edit AI-generated output and saves corrections
// so the AI can learn user preferences over time.
// ============================================================

(function() {

  // Store original AI outputs per element
  var _originals = {};

  // Track an output element: store original text when AI generates it
  window.trackAIOutput = function(elementId, originalText) {
    if (!elementId || !originalText) return;
    _originals[elementId] = originalText.trim();
  };

  // Save correction when user is done editing (call on save or blur)
  window.saveCorrection = function(elementId, section) {
    var original = _originals[elementId];
    if (!original) return;
    var el = document.getElementById(elementId);
    if (!el) return;
    var current = (el.innerText || el.textContent || '').trim();
    if (!current || current === original) return;

    // Only save if there's a meaningful difference (not just whitespace)
    var origWords = original.split(/\s+/).length;
    var currWords = current.split(/\s+/).length;
    var wordDiff = Math.abs(origWords - currWords);
    // Require at least some meaningful change
    if (wordDiff < 2 && original.length > 100) {
      // Check character-level difference
      var charDiff = Math.abs(original.length - current.length);
      if (charDiff < 20) return; // too minor
    }

    // Find the most significant changed section (not full text)
    var origSnippet = extractDiffSnippet(original, current);
    var corrSnippet = extractDiffSnippet(current, original);

    if (!origSnippet || !corrSnippet) {
      origSnippet = original.substring(0, 500);
      corrSnippet = current.substring(0, 500);
    }

    fetch('/api/memories/correction', {
      method: 'POST',
      headers: getAuthHeaders(),
      body: JSON.stringify({
        section: section || 'encounter',
        original_snippet: origSnippet,
        corrected_snippet: corrSnippet
      })
    }).then(function(r) { return r.json(); })
    .then(function(data) {
      if (data.success && !data.skipped) {
        console.log('[CorrectionTracker] Saved correction for', section);
      }
    }).catch(function() {});

    // Clear so we don't re-save
    delete _originals[elementId];
  };

  // Extract the most changed portion between two texts
  function extractDiffSnippet(text1, text2) {
    var lines1 = text1.split('\n');
    var lines2 = text2.split('\n');
    var changed = [];
    var maxLen = Math.max(lines1.length, lines2.length);

    for (var i = 0; i < maxLen; i++) {
      var l1 = (lines1[i] || '').trim();
      var l2 = (lines2[i] || '').trim();
      if (l1 !== l2 && l1) {
        changed.push(l1);
      }
    }

    if (changed.length === 0) return null;
    return changed.slice(0, 10).join('\n').substring(0, 1000);
  }

  console.log('Correction tracker loaded');
})();