import 'dart:math';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import '../models/divination_layout.dart';
import '../models/syncretic_session_model.dart';
import '../models/tradition_model.dart';
import '../models/word_model.dart';
import '../services/traditions_repository.dart';
import '../services/words_repository.dart';
import '../widgets/divination_instruction_modal.dart';
import 'lenormand_station_screen.dart';
import '../services/tarot_majors_repository.dart';

class TarotDivinationScreen extends StatefulWidget {
  final String? initialQuestion;

  const TarotDivinationScreen({super.key, this.initialQuestion});

  @override
  State<TarotDivinationScreen> createState() => _TarotDivinationScreenState();
}

class _TarotDivinationScreenState extends State<TarotDivinationScreen> with SingleTickerProviderStateMixin {
  late TabController _tabController;
  final _questionController = TextEditingController();
  final _repo = WordsRepository();

  List<TraditionStation> _arcana = [];
  bool _isShuffling = false;

  // Layouts: 1 arcanum, 3 arcana, 5 arcana
  DivinationLayout _selectedLayout = DivinationLayouts.tarotLayouts[0];
  int _currentStepIndex = 0;

  bool _isManualReversed = false;

  // Drawn results
  List<({TraditionStation arcanum, bool isReversed, String positionTitle})> _drawnResults = [];
  bool _savedToSession = false;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: 2, vsync: this);
    if (widget.initialQuestion != null) {
      _questionController.text = widget.initialQuestion!;
    }
    _loadArcana();
  }

  void _loadArcana() {
    final canon = TraditionsRepository().byId('tarot');
    if (canon != null) {
      _arcana = canon.stations;
    }
  }

  @override
  void dispose() {
    _tabController.dispose();
    _questionController.dispose();
    super.dispose();
  }

  void _onLayoutChanged(DivinationLayout layout) {
    setState(() {
      _selectedLayout = layout;
      _currentStepIndex = 0;
      _drawnResults.clear();
      _savedToSession = false;
    });
  }

  Future<void> _drawRandomCardForStep() async {
    if (_arcana.isEmpty || _currentStepIndex >= _selectedLayout.count) return;
    setState(() => _isShuffling = true);
    HapticFeedback.mediumImpact();

    final rnd = Random();
    await Future.delayed(const Duration(milliseconds: 350));

    final finalIdx = rnd.nextInt(_arcana.length);
    final isRev = rnd.nextBool() && rnd.nextBool(); // 25% chance

    final posTitle = _selectedLayout.positionTitles[_currentStepIndex];
    if (mounted) {
      setState(() {
        _isShuffling = false;
        _drawnResults.add((arcanum: _arcana[finalIdx], isReversed: isRev, positionTitle: posTitle));
        _currentStepIndex++;
        if (_currentStepIndex >= _selectedLayout.count) {
          _saveToSession('dice');
        }
      });
      HapticFeedback.heavyImpact();
    }
  }

  void _selectManualArcanum(int idx) {
    if (idx < 0 || idx >= _arcana.length || _currentStepIndex >= _selectedLayout.count) return;
    final posTitle = _selectedLayout.positionTitles[_currentStepIndex];

    setState(() {
      _drawnResults.add((arcanum: _arcana[idx], isReversed: _isManualReversed, positionTitle: posTitle));
      _isManualReversed = false;
      _currentStepIndex++;
      if (_currentStepIndex >= _selectedLayout.count) {
        _saveToSession('manual');
      }
    });
    HapticFeedback.selectionClick();
  }

  void _resetSpread() {
    setState(() {
      _currentStepIndex = 0;
      _drawnResults.clear();
      _savedToSession = false;
    });
  }

  Future<void> _saveToSession(String inputMethod) async {
    if (_drawnResults.isEmpty) return;

    final items = _drawnResults.map((r) {
      WordItem? linkedWord;
      if (r.arcanum.primary != null) {
        linkedWord = _repo.getWordById(r.arcanum.primary!.id) ?? _repo.getWordByName(r.arcanum.primary!.word);
      }
      return ReadingSignItem(
        title: '${r.positionTitle}: ${r.arcanum.name}',
        subtitle: r.arcanum.group,
        symbol: r.arcanum.symbol.isNotEmpty ? r.arcanum.symbol : '🎴',
        lore: r.arcanum.lore,
        isReversed: r.isReversed,
        linkedWord: linkedWord,
      );
    }).toList();

    final reading = SyncreticReading(
      id: 'reading_${DateTime.now().millisecondsSinceEpoch}',
      systemId: 'tarot',
      systemName: 'Таро (Старшие Арканы)',
      systemIcon: '🎴',
      timestamp: DateTime.now(),
      layoutTitle: '${_selectedLayout.title} (${inputMethod == "dice" ? "колода" : "со стола"})',
      inputMethod: inputMethod,
      items: items,
      question: _questionController.text.trim(),
    );

    await _repo.addReadingToSyncreticSession(reading, question: _questionController.text.trim());
    if (mounted) {
      setState(() => _savedToSession = true);
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text('Расклад Таро «${_selectedLayout.title}» сохранён в сессию дня!'),
          backgroundColor: const Color(0xFF2E7D32),
          behavior: SnackBarBehavior.floating,
          duration: const Duration(seconds: 2),
        ),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    final isSpreadComplete = _currentStepIndex >= _selectedLayout.count;

    return Scaffold(
      backgroundColor: const Color(0xFF0C0E1A),
      appBar: AppBar(
        actions: [
          IconButton(
            tooltip: 'Инструкция по Таро',
            icon: const Icon(Icons.help_outline_rounded, color: Color(0xFFFFD54F)),
            onPressed: () => DivinationInstructionModal.show(context, 'tarot'),
          ),
          if (_drawnResults.isNotEmpty)
            IconButton(
              tooltip: 'Сбросить расклад',
              icon: const Icon(Icons.refresh_rounded),
              onPressed: _resetSpread,
            ),
        ],
        title: const Row(
          children: [
            Text('🎴', style: TextStyle(fontSize: 22)),
            SizedBox(width: 8),
            Text('Таро (Старшие Арканы)', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 17)),
          ],
        ),
        bottom: TabBar(
          controller: _tabController,
          indicatorColor: const Color(0xFFFFD54F),
          tabs: const [
            Tab(icon: Icon(Icons.style_rounded, size: 18), text: 'Жребий колоды'),
            Tab(icon: Icon(Icons.touch_app_rounded, size: 18), text: 'Выбор из 22 Арканов'),
          ],
        ),
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            TextField(
              controller: _questionController,
              style: const TextStyle(color: Colors.white, fontSize: 14),
              decoration: InputDecoration(
                hintText: 'Вопрос к Старшим Арканам...',
                hintStyle: const TextStyle(color: Color(0xFF8C93B8), fontSize: 13),
                prefixIcon: const Icon(Icons.help_outline_rounded, color: Color(0xFFFFD54F), size: 18),
                filled: true,
                fillColor: const Color(0xFF151829),
                border: OutlineInputBorder(borderRadius: BorderRadius.circular(14)),
                enabledBorder: OutlineInputBorder(
                  borderRadius: BorderRadius.circular(14),
                  borderSide: const BorderSide(color: Color(0xFF2A2D4A)),
                ),
              ),
            ),
            const SizedBox(height: 14),

            // Layout Picker Row
            Row(
              children: [
                const Icon(Icons.dashboard_customize_rounded, size: 16, color: Color(0xFFFFD54F)),
                const SizedBox(width: 6),
                const Text('РАСКЛАД:', style: TextStyle(color: Color(0xFFFFD54F), fontSize: 11, fontWeight: FontWeight.bold)),
                const SizedBox(width: 8),
                Expanded(
                  child: SingleChildScrollView(
                    scrollDirection: Axis.horizontal,
                    child: Row(
                      children: DivinationLayouts.tarotLayouts.map((l) {
                        final isSel = _selectedLayout.id == l.id;
                        return Padding(
                          padding: const EdgeInsets.only(right: 6),
                          child: ChoiceChip(
                            label: Text(l.title, style: TextStyle(fontSize: 11.5, fontWeight: isSel ? FontWeight.bold : FontWeight.normal)),
                            selected: isSel,
                            selectedColor: const Color(0xFF4A3E1E),
                            side: BorderSide(color: isSel ? const Color(0xFFFFD54F) : const Color(0xFF2A2D4A)),
                            onSelected: (_) => _onLayoutChanged(l),
                          ),
                        );
                      }).toList(),
                    ),
                  ),
                ),
              ],
            ),
            const SizedBox(height: 14),

            // Progress Banner
            Container(
              padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 8),
              decoration: BoxDecoration(
                color: const Color(0xFF181C30),
                borderRadius: BorderRadius.circular(12),
                border: Border.all(color: const Color(0xFF2A2D4A)),
              ),
              child: Row(
                children: [
                  Text(
                    'Позиция: ${_currentStepIndex + 1} из ${_selectedLayout.count}',
                    style: const TextStyle(color: Color(0xFF80DEEA), fontSize: 12, fontWeight: FontWeight.bold),
                  ),
                  const SizedBox(width: 8),
                  if (!isSpreadComplete)
                    Expanded(
                      child: Text(
                        '«${_selectedLayout.positionTitles[_currentStepIndex]}»',
                        style: const TextStyle(color: Color(0xFFFFF9C4), fontSize: 12, fontWeight: FontWeight.bold),
                        overflow: TextOverflow.ellipsis,
                      ),
                    )
                  else
                    const Text('✓ Расклад собран', style: TextStyle(color: Color(0xFF81C784), fontSize: 12, fontWeight: FontWeight.bold)),
                ],
              ),
            ),
            const SizedBox(height: 14),

            if (!isSpreadComplete)
              SizedBox(
                height: 280,
                child: TabBarView(
                  controller: _tabController,
                  children: [
                    _buildDeckTab(),
                    _buildManualTab(),
                  ],
                ),
              ),

            if (isSpreadComplete) ...[
              Container(
                padding: const EdgeInsets.all(14),
                decoration: BoxDecoration(
                  color: const Color(0xFF1E2238),
                  borderRadius: BorderRadius.circular(14),
                  border: Border.all(color: const Color(0xFF81C784)),
                ),
                child: Row(
                  children: [
                    const Icon(Icons.check_circle_rounded, color: Color(0xFF81C784), size: 20),
                    const SizedBox(width: 10),
                    const Expanded(
                      child: Text(
                        'Все арканы расклада извлечены и записаны в сессию дня!',
                        style: TextStyle(color: Color(0xFFECEFF1), fontSize: 12.5, fontWeight: FontWeight.bold),
                      ),
                    ),
                    TextButton(
                      onPressed: _resetSpread,
                      child: const Text('Заново', style: TextStyle(color: Color(0xFFFFD54F), fontWeight: FontWeight.bold)),
                    ),
                  ],
                ),
              ),
            ],
            const SizedBox(height: 16),

            if (_drawnResults.isNotEmpty) ...[
              const Text(
                'ВЫПАВШИЕ АРКАНЫ В РАСКЛАДЕ:',
                style: TextStyle(color: Color(0xFFFFD54F), fontSize: 11.5, fontWeight: FontWeight.w900, letterSpacing: 0.8),
              ),
              const SizedBox(height: 10),
              for (int i = 0; i < _drawnResults.length; i++) ...[
                _buildResultArcanumCard(_drawnResults[i], i + 1),
                const SizedBox(height: 10),
              ],
            ],
          ],
        ),
      ),
    );
  }

  Widget _buildDeckTab() {
    return Container(
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: const Color(0xFF151829),
        borderRadius: BorderRadius.circular(20),
        border: Border.all(color: const Color(0xFF2A2D4A)),
      ),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Container(
            width: 80,
            height: 115,
            decoration: BoxDecoration(
              gradient: const LinearGradient(
                begin: Alignment.topLeft,
                end: Alignment.bottomRight,
                colors: [Color(0xFF39295C), Color(0xFF1E1738)],
              ),
              borderRadius: BorderRadius.circular(14),
              border: Border.all(color: const Color(0xFFFFD54F), width: 1.5),
            ),
            child: const Center(
              child: Icon(Icons.auto_awesome_rounded, color: Color(0xFFFFD54F), size: 30),
            ),
          ),
          const SizedBox(height: 12),
          Text(
            'Извлечение позиции: «' + _selectedLayout.positionTitles[_currentStepIndex] + '»',
            textAlign: TextAlign.center,
            style: const TextStyle(color: Color(0xFF8C93B8), fontSize: 11.5),
          ),
          const SizedBox(height: 14),
          ElevatedButton.icon(
            style: ElevatedButton.styleFrom(
              backgroundColor: const Color(0xFFFFD54F),
              foregroundColor: Colors.black,
              padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
            ),
            onPressed: _isShuffling ? null : _drawRandomCardForStep,
            icon: const Icon(Icons.style_rounded, size: 20),
            label: Text(
              _isShuffling ? 'Тасовка колоды...' : 'Вытянуть для шага ${_currentStepIndex + 1}',
              style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 13.5),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildManualTab() {
    return Container(
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: const Color(0xFF151829),
        borderRadius: BorderRadius.circular(20),
        border: Border.all(color: const Color(0xFF2A2D4A)),
      ),
      child: Column(
        children: [
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text('АРКАН ДЛЯ ШАГА ${_currentStepIndex + 1}:', style: const TextStyle(color: Color(0xFFFFD54F), fontSize: 11, fontWeight: FontWeight.bold)),
              FilterChip(
                label: const Text('Перевёрнутый', style: TextStyle(fontSize: 10.5)),
                selected: _isManualReversed,
                selectedColor: const Color(0xFFEF5350).withValues(alpha: 0.3),
                side: BorderSide(color: _isManualReversed ? const Color(0xFFEF5350) : const Color(0xFF2A2D4A)),
                onSelected: (v) => setState(() => _isManualReversed = v),
              ),
            ],
          ),
          const SizedBox(height: 8),
          Expanded(
            child: ListView.builder(
              itemCount: _arcana.length,
              itemBuilder: (ctx, i) {
                final a = _arcana[i];
                return ListTile(
                  dense: true,
                  contentPadding: const EdgeInsets.symmetric(horizontal: 10),
                  leading: Text(
                    '${i == 0 ? "0" : i}',
                    style: const TextStyle(color: Color(0xFF8C93B8), fontWeight: FontWeight.bold),
                  ),
                  title: Text(
                    a.name,
                    style: const TextStyle(color: Color(0xFFE0E2EC), fontSize: 13),
                  ),
                  trailing: const Icon(Icons.touch_app_rounded, size: 16, color: Color(0xFFFFD54F)),
                  onTap: () => _selectManualArcanum(i),
                );
              },
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildResultArcanumCard(({TraditionStation arcanum, bool isReversed, String positionTitle}) res, int index) {
    final a = res.arcanum;
    return Container(
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: const Color(0xFF181C30),
        borderRadius: BorderRadius.circular(16),
        border: Border.all(color: const Color(0xFFFFD54F).withValues(alpha: 0.4)),
      ),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Container(
            width: 44,
            height: 44,
            alignment: Alignment.center,
            decoration: BoxDecoration(
              color: const Color(0xFF232742),
              borderRadius: BorderRadius.circular(10),
              border: Border.all(color: const Color(0xFFFFD54F)),
            ),
            child: const Icon(Icons.style_rounded, color: Color(0xFFFFD54F), size: 24),
          ),
          const SizedBox(width: 12),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Row(
                  children: [
                    Expanded(
                      child: Text(
                        '#$index. ${res.positionTitle}: ${a.name}',
                        style: const TextStyle(color: Color(0xFFFFF9C4), fontSize: 14, fontWeight: FontWeight.bold),
                      ),
                    ),
                    if (res.isReversed)
                      Container(
                        padding: const EdgeInsets.symmetric(horizontal: 5, vertical: 2),
                        decoration: BoxDecoration(
                          color: const Color(0xFF5C1D1D),
                          borderRadius: BorderRadius.circular(6),
                          border: Border.all(color: const Color(0xFFEF5350)),
                        ),
                        child: const Text('Перевёрнутый', style: TextStyle(color: Color(0xFFFF8A80), fontSize: 9.5, fontWeight: FontWeight.bold)),
                      ),
                  ],
                ),
                const SizedBox(height: 4),
                Text(a.group, style: const TextStyle(color: Color(0xFF80DEEA), fontSize: 11)),
                const SizedBox(height: 6),
                Text(
                  a.lore,
                  maxLines: 2,
                  overflow: TextOverflow.ellipsis,
                  style: const TextStyle(color: Color(0xFFD1D5DB), fontSize: 12, height: 1.4),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}