detectEmotionalValence method

Implementation

EmotionalValence detectEmotionalValence(List<String> emotionalCues) {
  if (emotionalCues.isEmpty) return EmotionalValence.neutral;

  const positiveWords = {
    'happy', 'joy', 'love', 'safe', 'excited', 'calm',
  };
  const negativeWords = {
    'sad', 'angry', 'afraid', 'scared', 'pain', 'danger',
    'hungry', 'tired', 'worried', 'frustrated', 'hate', 'fear',
  };

  var positiveCount = 0;
  var negativeCount = 0;
  for (final cue in emotionalCues) {
    if (positiveWords.contains(cue)) positiveCount++;
    if (negativeWords.contains(cue)) negativeCount++;
  }

  if (positiveCount == 0 && negativeCount == 0) {
    return EmotionalValence.neutral;
  }

  final balance = (positiveCount - negativeCount).toDouble();
  final total = (positiveCount + negativeCount).toDouble();
  final ratio = balance / total;

  if (ratio >= 0.6) return EmotionalValence.veryPositive;
  if (ratio >= 0.2) return EmotionalValence.positive;
  if (ratio <= -0.6) return EmotionalValence.veryNegative;
  if (ratio <= -0.2) return EmotionalValence.negative;
  return EmotionalValence.neutral;
}