FabledApp/lib/data/models/journal_day.dart

import 'message.dart';

/// Lightweight conversation header for a journal day — just enough to drive
/// navigation and labels. The full message list comes alongside in [JournalDay].
class JournalConversation {
  final int id;
  final String title;
  final String conversationType;
  final String? dayDate; // YYYY-MM-DD or null

  const JournalConversation({
    required this.id,
    required this.title,
    required this.conversationType,
    this.dayDate,
  });

  factory JournalConversation.fromJson(Map<String, dynamic> json) =>
      JournalConversation(
        id: json['id'] as int,
        title: json['title'] as String? ?? '',
        conversationType:
            json['conversation_type'] as String? ?? 'journal',
        dayDate: json['day_date'] as String?,
      );
}

/// Payload returned by GET /api/journal/today and /api/journal/day/&lt;iso&gt;.
/// `conversation` is null on a day with no journal content yet (rare —
/// the today endpoint creates it on demand).
class JournalDay {
  final String dayDate;
  final JournalConversation? conversation;
  final List<Message> messages;

  const JournalDay({
    required this.dayDate,
    required this.conversation,
    required this.messages,
  });

  factory JournalDay.fromJson(Map<String, dynamic> json) {
    final convRaw = json['conversation'] as Map<String, dynamic>?;
    final rawMessages = json['messages'] as List<dynamic>? ?? [];
    return JournalDay(
      dayDate: json['day_date'] as String,
      conversation:
          convRaw == null ? null : JournalConversation.fromJson(convRaw),
      messages: rawMessages
          .map((e) => Message.fromJson(e as Map<String, dynamic>))
          .toList(),
    );
  }

  JournalDay copyWith({List<Message>? messages}) => JournalDay(
        dayDate: dayDate,
        conversation: conversation,
        messages: messages ?? this.messages,
      );
}