import '../database/daos/mood_dao.dart';

abstract class PromptBuilder {
  static String buildWeeklyPrompt(List<MoodEntryWithActivities> entries) {
    final lines = entries.map(_entryLine).join('\n');
    return '''
You are a personal wellbeing assistant analysing a private mood journal.
Analyse the following data and identify 2–3 patterns or correlations across mood, sleep, energy, positivity, and self-worth.
End with one specific, actionable suggestion. Be concise (4–6 sentences total). Do not greet the user.

$lines''';
  }

  static String _entryLine(MoodEntryWithActivities e) {
    final dt = e.entry.timestamp;
    final date =
        '${dt.year}-${dt.month.toString().padLeft(2, '0')}-${dt.day.toString().padLeft(2, '0')}';
    final time =
        '${dt.hour.toString().padLeft(2, '0')}:${dt.minute.toString().padLeft(2, '0')}';

    final parts = <String>[
      '$date $time',
      'Mood ${e.entry.moodLevel}/5',
    ];

    if (e.entry.sleepMinutes != null) {
      final h = e.entry.sleepMinutes! ~/ 60;
      final m = (e.entry.sleepMinutes! % 60).toString().padLeft(2, '0');
      parts.add('Sleep ${h}h$m');
    }
    if (e.entry.energyLevel != null) {
      parts.add('Energy ${_scale(e.entry.energyLevel!, _energyLabels)}');
    }
    if (e.entry.positivityLevel != null) {
      parts.add('Positivity ${_scale(e.entry.positivityLevel!, _positivityLabels)}');
    }
    if (e.entry.selfWorthLevel != null) {
      parts.add('Self-worth ${_scale(e.entry.selfWorthLevel!, _selfWorthLabels)}');
    }
    if (e.activities.isNotEmpty) {
      parts.add('Activities: ${e.activities.map((a) => a.name).join(', ')}');
    }
    if (e.entry.note != null && e.entry.note!.isNotEmpty) {
      parts.add('Note: ${e.entry.note}');
    }

    return parts.join(' | ');
  }

  static String _scale(int level, List<String> labels) =>
      labels[(level - 1).clamp(0, labels.length - 1)];

  static const _energyLabels = ['very low', 'low', 'ok', 'high', 'very high'];
  static const _positivityLabels = ['very negative', 'negative', 'neutral', 'positive', 'very positive'];
  static const _selfWorthLabels = ['very low', 'low', 'moderate', 'high', 'very high'];
}