import 'dart:convert';
import 'word_model.dart';

/// Single item in a divination reading (e.g. a drawn Rune, Card, Hexagram, or Sign)
class ReadingSignItem {
  final String title;
  final String? subtitle;
  final String? symbol;
  final String? lore;
  final bool isReversed;
  final WordItem? linkedWord;
  final Map<String, dynamic>? meta;

  const ReadingSignItem({
    required this.title,
    this.subtitle,
    this.symbol,
    this.lore,
    this.isReversed = false,
    this.linkedWord,
    this.meta,
  });

  Map<String, dynamic> toMap() => {
        'title': title,
        if (subtitle != null) 'subtitle': subtitle,
        if (symbol != null) 'symbol': symbol,
        if (lore != null) 'lore': lore,
        'isReversed': isReversed,
        if (linkedWord != null) 'linkedWord': linkedWord!.toMap(),
        if (meta != null) 'meta': meta,
      };

  factory ReadingSignItem.fromMap(Map<String, dynamic> map) => ReadingSignItem(
        title: map['title'] as String? ?? '',
        subtitle: map['subtitle'] as String?,
        symbol: map['symbol'] as String?,
        lore: map['lore'] as String?,
        isReversed: map['isReversed'] as bool? ?? false,
        linkedWord: map['linkedWord'] != null
            ? WordItem.fromMap(map['linkedWord'] as Map<String, dynamic>)
            : null,
        meta: map['meta'] as Map<String, dynamic>?,
      );
}

/// A single completed divination reading inside a day session
class SyncreticReading {
  final String id;
  final String systemId; // 'cleromancy', 'matrix', 'runes', 'lenormand', 'tarot', 'iching', 'ogham', 'geomancy'
  final String systemName;
  final String systemIcon;
  final DateTime timestamp;
  final String layoutTitle; // e.g. 'Бросок 2d12', 'Ленорман d6+d12', 'Триптих Норн'
  final String inputMethod; // 'dice' | 'manual'
  final List<ReadingSignItem> items;
  final String? note;
  final String? question;

  const SyncreticReading({
    required this.id,
    required this.systemId,
    required this.systemName,
    required this.systemIcon,
    required this.timestamp,
    required this.layoutTitle,
    this.inputMethod = 'dice',
    required this.items,
    this.note,
    this.question,
  });

  String get formattedTime {
    final hour = timestamp.hour.toString().padLeft(2, '0');
    final min = timestamp.minute.toString().padLeft(2, '0');
    return '$hour:$min';
  }

  Map<String, dynamic> toMap() => {
        'id': id,
        'systemId': systemId,
        'systemName': systemName,
        'systemIcon': systemIcon,
        'timestamp': timestamp.toIso8601String(),
        'layoutTitle': layoutTitle,
        'inputMethod': inputMethod,
        'items': items.map((i) => i.toMap()).toList(),
        if (note != null) 'note': note,
        if (question != null) 'question': question,
      };

  factory SyncreticReading.fromMap(Map<String, dynamic> map) => SyncreticReading(
        id: map['id'] as String? ?? '',
        systemId: map['systemId'] as String? ?? '',
        systemName: map['systemName'] as String? ?? '',
        systemIcon: map['systemIcon'] as String? ?? '🔮',
        timestamp: DateTime.tryParse(map['timestamp'] as String? ?? '') ?? DateTime.now(),
        layoutTitle: map['layoutTitle'] as String? ?? '',
        inputMethod: map['inputMethod'] as String? ?? 'dice',
        items: (map['items'] as List<dynamic>?)
                ?.map((i) => ReadingSignItem.fromMap(i as Map<String, dynamic>))
                .toList() ??
            [],
        note: map['note'] as String?,
        question: map['question'] as String?,
      );
}

/// A day-long (or question-long) Syncretic Session accumulating multiple readings across systems
class SyncreticSession {
  final String id;
  final DateTime date;
  final String? mainQuestion;
  final List<SyncreticReading> readings;
  final String? comparativeAiSynthesis;

  const SyncreticSession({
    required this.id,
    required this.date,
    this.mainQuestion,
    this.readings = const [],
    this.comparativeAiSynthesis,
  });

  String get dateKey =>
      '${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}';

  String get formattedDate {
    final day = date.day.toString().padLeft(2, '0');
    final month = date.month.toString().padLeft(2, '0');
    final year = date.year.toString();
    return '$day.$month.$year';
  }

  SyncreticSession copyWith({
    String? id,
    DateTime? date,
    String? mainQuestion,
    List<SyncreticReading>? readings,
    String? comparativeAiSynthesis,
  }) {
    return SyncreticSession(
      id: id ?? this.id,
      date: date ?? this.date,
      mainQuestion: mainQuestion ?? this.mainQuestion,
      readings: readings ?? this.readings,
      comparativeAiSynthesis: comparativeAiSynthesis ?? this.comparativeAiSynthesis,
    );
  }

  Map<String, dynamic> toMap() => {
        'id': id,
        'date': date.toIso8601String(),
        if (mainQuestion != null) 'mainQuestion': mainQuestion,
        'readings': readings.map((r) => r.toMap()).toList(),
        if (comparativeAiSynthesis != null) 'comparativeAiSynthesis': comparativeAiSynthesis,
      };

  factory SyncreticSession.fromMap(Map<String, dynamic> map) => SyncreticSession(
        id: map['id'] as String? ?? '',
        date: DateTime.tryParse(map['date'] as String? ?? '') ?? DateTime.now(),
        mainQuestion: map['mainQuestion'] as String?,
        readings: (map['readings'] as List<dynamic>?)
                ?.map((r) => SyncreticReading.fromMap(r as Map<String, dynamic>))
                .toList() ??
            [],
        comparativeAiSynthesis: map['comparativeAiSynthesis'] as String?,
      );

  String toJson() => jsonEncode(toMap());
  factory SyncreticSession.fromJson(String str) => SyncreticSession.fromMap(jsonDecode(str));
}