import 'manual_dive_screen.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import '../models/word_model.dart';
import '../models/culture_branch.dart';
import '../services/ai_oracle_service.dart';
import '../services/words_repository.dart';
import '../widgets/gradient_star_badge.dart';
import '../services/oracle_master_prompt_generator.dart';

class EditSymbolScreen extends StatefulWidget {
  final WordItem word;

  const EditSymbolScreen({super.key, required this.word});

  @override
  State<EditSymbolScreen> createState() => _EditSymbolScreenState();
}

class _EditSymbolScreenState extends State<EditSymbolScreen> {
  final _formKey = GlobalKey<FormState>();
  final _repo = WordsRepository();
  final _aiService = AiOracleService();

  late final TextEditingController _coreController;
  late final TextEditingController _oracleController;
  late final TextEditingController _shadowController;
  late final TextEditingController _asksController;
  late final TextEditingController _stepController;
  late final TextEditingController _culturesController;

  bool _isSaving = false;
  bool _isGeneratingAi = false;
  bool _isDistributing = false;

  @override
  void initState() {
    super.initState();
    final w = widget.word;
    _coreController = TextEditingController(text: w.core);
    _oracleController = TextEditingController(
      text: w.oracle.isNotEmpty ? w.oracle : w.description,
    );
    _shadowController = TextEditingController(text: w.shadow);
    _asksController = TextEditingController(text: w.asks);
    _stepController = TextEditingController(text: w.step);
    _culturesController = TextEditingController(text: formatCulturesBlock(w.cultures));

    _coreController.addListener(() => _checkAndDistributeMultiBlockPaste(_coreController));
    _oracleController.addListener(() => _checkAndDistributeMultiBlockPaste(_oracleController));
  }

  void _checkAndDistributeMultiBlockPaste(TextEditingController controller) {
    if (_isDistributing) return;
    final val = controller.text;
    if (val.length > 80 &&
        (val.contains('##') ||
            (val.toUpperCase().contains('ОРАКУЛ') &&
                (val.toUpperCase().contains('ТЕНЬ') || val.toUpperCase().contains('ЯДРО'))))) {
      final blocks = _parseRevisionBlocks(val);
      if (blocks.length >= 2) {
        _isDistributing = true;
        setState(() {
          if (blocks.containsKey('ЯДРО')) _coreController.text = blocks['ЯДРО']!;
          if (blocks.containsKey('ОРАКУЛ')) _oracleController.text = blocks['ОРАКУЛ']!;
          if (blocks.containsKey('ТЕНЬ')) _shadowController.text = blocks['ТЕНЬ']!;
          if (blocks.containsKey('ВОПРОС')) _asksController.text = blocks['ВОПРОС']!;
          if (blocks.containsKey('ЖЕСТ')) _stepController.text = blocks['ЖЕСТ']!;
          if (blocks.containsKey('КУЛЬТУРЫ')) _culturesController.text = formatCulturesBlock(parseCulturesBlock(blocks['КУЛЬТУРЫ']!));
        });
        _isDistributing = false;
        HapticFeedback.mediumImpact();
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Row(
              children: [
                const Icon(Icons.auto_fix_high_rounded, color: Color(0xFF81C784), size: 20),
                const SizedBox(width: 10),
                Expanded(
                  child: Text('Умное распределение: распознано ${blocks.length} секций и заполнено по всем 5 полям!'),
                ),
              ],
            ),
            backgroundColor: const Color(0xFF1B3D2F),
            behavior: SnackBarBehavior.floating,
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
          ),
        );
      }
    }
  }

  @override
  void dispose() {
    _coreController.dispose();
    _oracleController.dispose();
    _shadowController.dispose();
    _asksController.dispose();
    _stepController.dispose();
    _culturesController.dispose();
    super.dispose();
  }

  /// Builds the Master Prompt for deep culturological and mythological enrichment of the Archetype.
  String _buildPrePrompt() {
    return OracleMasterPromptGenerator.generateArchetypeEnrichmentPrompt(
      widget.word,
      customCore: _coreController.text,
      customOracle: _oracleController.text,
      customShadow: _shadowController.text,
      customAsks: _asksController.text,
      customStep: _stepController.text,
    );
  }

  void _copyPrePrompt() {
    final prompt = _buildPrePrompt();
    Clipboard.setData(ClipboardData(text: prompt));
    HapticFeedback.mediumImpact();
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(
        content: const Row(
          children: [
            GradientStar(size: 18),
            SizedBox(width: 10),
            Expanded(
              child: Text(
                'Предпромпт со всей текущей информацией скопирован! Вставьте его в любую нейросеть.',
                style: TextStyle(fontSize: 13),
              ),
            ),
          ],
        ),
        duration: const Duration(seconds: 3),
        behavior: SnackBarBehavior.floating,
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
      ),
    );
  }

  void _showPrePromptViewer() {
    final prompt = _buildPrePrompt();
    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      backgroundColor: const Color(0xFF151829),
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(24)),
      ),
      builder: (ctx) => DraggableScrollableSheet(
        initialChildSize: 0.75,
        minChildSize: 0.4,
        maxChildSize: 0.95,
        expand: false,
        builder: (_, scrollController) => Padding(
          padding: const EdgeInsets.fromLTRB(16, 12, 16, 20),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Center(
                child: Container(
                  width: 40,
                  height: 4,
                  margin: const EdgeInsets.only(bottom: 12),
                  decoration: BoxDecoration(
                    color: const Color(0xFF3949AB),
                    borderRadius: BorderRadius.circular(2),
                  ),
                ),
              ),
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  const Row(
                    children: [
                      GradientStar(size: 20),
                      SizedBox(width: 8),
                      Text(
                        'Полный Предпромпт для ИИ',
                        style: TextStyle(
                          color: Color(0xFFFFF9C4),
                          fontSize: 16,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    ],
                  ),
                  IconButton(
                    icon: const Icon(Icons.close_rounded, color: Color(0xFF8C93B8)),
                    onPressed: () => Navigator.pop(ctx),
                  ),
                ],
              ),
              const SizedBox(height: 8),
              const Text(
                'Включает все текущие данные знака, чтобы не повторяться и получить глубокую редакцию:',
                style: TextStyle(color: Color(0xFF8C93B8), fontSize: 12),
              ),
              const SizedBox(height: 12),
              Expanded(
                child: Container(
                  padding: const EdgeInsets.all(12),
                  decoration: BoxDecoration(
                    color: const Color(0xFF0C0E1A),
                    borderRadius: BorderRadius.circular(14),
                    border: Border.all(color: const Color(0xFF2A2D4A)),
                  ),
                  child: SingleChildScrollView(
                    controller: scrollController,
                    child: SelectableText(
                      prompt,
                      style: const TextStyle(
                        color: Color(0xFFE0E2EC),
                        fontSize: 12.5,
                        height: 1.45,
                        fontFamily: 'monospace',
                      ),
                    ),
                  ),
                ),
              ),
              const SizedBox(height: 12),
              ElevatedButton.icon(
                style: ElevatedButton.styleFrom(
                  backgroundColor: const Color(0xFFFFD54F),
                  foregroundColor: const Color(0xFF0C0E1A),
                  padding: const EdgeInsets.symmetric(vertical: 12),
                  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
                ),
                icon: const Icon(Icons.copy_rounded, size: 18),
                label: const Text(
                  'Скопировать предпромпт в буфер обмена',
                  style: TextStyle(fontWeight: FontWeight.w900, fontSize: 13),
                ),
                onPressed: () {
                  Navigator.pop(ctx);
                  _copyPrePrompt();
                },
              ),
            ],
          ),
        ),
      ),
    );
  }

  Map<String, String> _parseRevisionBlocks(String text) {
    final blocks = <String, String>{};
    if (text.trim().isEmpty) return blocks;

    // 1. Clean markdown code fences if wrapped in ```markdown ... ```
    var src = text.trim();
    if (src.startsWith('```')) {
      src = src.replaceFirst(RegExp(r'^```[a-zA-Z]*\n?'), '');
      if (src.endsWith('```')) {
        src = src.substring(0, src.length - 3).trim();
      }
    }

    final lines = src.replaceAll('\r\n', '\n').split('\n');

    String? detectSlot(String line) {
      final stripped = line.trim();
      if (stripped.isEmpty || stripped.length > 95) return null;

      final isHeaderFormat = stripped.startsWith('#') ||
          stripped.startsWith('*') ||
          stripped.startsWith('[') ||
          RegExp(r'^(?:\d+[\.\)]|[IVX]+[\.\)])').hasMatch(stripped) ||
          (stripped.length < 70 && (stripped.endsWith(':') || stripped == stripped.toUpperCase())) ||
          RegExp(r'(?:ЯДРО|ОРАКУЛ|ТЕНЬ|ВОПРОС|ЖЕСТ|КОАН|КУЛЬТУР)', caseSensitive: false).hasMatch(stripped);

      if (!isHeaderFormat) return null;

      // 0. КУЛЬТУРЫ — сравнительный атлас традиций (подзаголовки ### внутри остаются в блоке)
      if (RegExp(r'^[#*\s\[\d.)]*(?:🌍\s*)?КУЛЬТУР[А-Яа-я]*(?:[^\wа-яА-ЯёЁ]|$)', caseSensitive: false).hasMatch(stripped)) {
        return 'КУЛЬТУРЫ';
      }
      // 1. ЯДРО / ФОРМУЛА
      if (RegExp(r'(?:^|[^\wа-яА-ЯёЁ])(?:ЯДР[ОАЕУ]|ФОРМУЛ[А-Яа-я]*|ОНТОЛОГИ[А-Яа-я]*)(?:[^\wа-яА-ЯёЁ]|$)', caseSensitive: false).hasMatch(stripped)) {
        return 'ЯДРО';
      }
      // 2. ВОПРОС / КОАН (checked before ТЕНЬ to prevent 'экзистенциальный' substring collision)
      if (RegExp(r'(?:^|[^\wа-яА-ЯёЁ])(?:ВОПРОС[А-Яа-я]*|КОАН[А-Яа-я]*|РЕФЛЕКСИ[А-Яа-я]*)(?:[^\wа-яА-ЯёЁ]|$)', caseSensitive: false).hasMatch(stripped)) {
        return 'ВОПРОС';
      }
      // 3. ТЕНЬ / ЛОВУШКА
      if (RegExp(r'(?:^|[^\wа-яА-ЯёЁ])(?:ТЕН[ЬЯЕИЮ]|ТЕНЕВ[А-Яа-я]*|ЛОВУШК[А-Яа-я]*|ИСКАЖЕН[А-Яа-я]*|СЛЕП[А-Яа-я]*\s+ЗОН[А-Яа-я]*)(?:[^\wа-яА-ЯёЁ]|$)', caseSensitive: false).hasMatch(stripped)) {
        return 'ТЕНЬ';
      }
      // 4. ЖЕСТ / МИКРОДЕЙСТВИЕ
      if (RegExp(r'(?:^|[^\wа-яА-ЯёЁ])(?:ЖЕСТ[А-Яа-я]*|МИКРОДЕЙСТВИ[А-Яа-я]*|ДЕЙСТВИ[ЕЯ]|ПРАКТИК[А-Яа-я]*)(?:[^\wа-яА-ЯёЁ]|$)', caseSensitive: false).hasMatch(stripped)) {
        return 'ЖЕСТ';
      }
      // 5. ОРАКУЛ / СТАТЬЯ / ЭССЕ
      if (RegExp(r'(?:^|[^\wа-яА-ЯёЁ])(?:ОРАКУЛ[А-Яа-я]*|СТАТЬ[ЯЕИЮ]|ЭССЕ|ТОЛКОВАНИ[А-Яа-я]*|ОБОГАЩЕНИ[А-Яа-я]*)(?:[^\wа-яА-ЯёЁ]|$)', caseSensitive: false).hasMatch(stripped)) {
        return 'ОРАКУЛ';
      }

      return null;
    }

    final headers = <({int lineIdx, String slot})>[];
    for (int i = 0; i < lines.length; i++) {
      final slot = detectSlot(lines[i]);
      if (slot != null) {
        headers.add((lineIdx: i, slot: slot));
      }
    }

    for (int i = 0; i < headers.length; i++) {
      final startLineIdx = headers[i].lineIdx + 1;
      final slot = headers[i].slot;
      final endLineIdx = (i + 1 < headers.length) ? headers[i + 1].lineIdx : lines.length;

      var content = lines.sublist(startLineIdx, endLineIdx).join('\n').trim();

      // Strip prompt instructions in parentheses like (1–2 чеканных...) at the top
      content = content.replaceFirst(
        RegExp(r'^\s*\([^)]*(?:предложен|абзац|коан|действи|формул|ловушк|стать)[^)]*\)\s*\n?', caseSensitive: false),
        '',
      ).trim();

      // Strip trailing metric block like "Метрика: 4850 символов"
      content = content.replaceAll(
        RegExp(r'(?:\n|\r\n)\s*(?:Метрика|Количество символов|Символов|Длина текста)[:—–\s][\s\S]*$', caseSensitive: false),
        '',
      ).trim();

      if (content.isNotEmpty) {
        if (!blocks.containsKey(slot) || content.length > blocks[slot]!.length) {
          blocks[slot] = content;
        }
      }
    }

    return blocks;
  }

  Future<void> _pasteFromMarkdownClipboard() async {
    HapticFeedback.lightImpact();
    final data = await Clipboard.getData(Clipboard.kTextPlain);
    final text = data?.text?.trim() ?? '';

    if (text.isEmpty) {
      _showManualMarkdownInputDialog();
      return;
    }

    final blocks = _parseRevisionBlocks(text);
    if (blocks.isEmpty) {
      _showManualMarkdownInputDialog(initialText: text);
      return;
    }

    _showImportPreviewModal(blocks, rawText: text, title: 'Умная вставка из Markdown');
  }

  void _showManualMarkdownInputDialog({String? initialText}) {
    final controller = TextEditingController(text: initialText ?? '');
    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      backgroundColor: const Color(0xFF151829),
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(24)),
      ),
      builder: (ctx) => Padding(
        padding: EdgeInsets.only(
          bottom: MediaQuery.of(ctx).viewInsets.bottom + 20,
          left: 16,
          right: 16,
          top: 16,
        ),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            Row(
              children: [
                const Icon(Icons.paste_rounded, color: Color(0xFFA5D6A7), size: 20),
                const SizedBox(width: 8),
                const Expanded(
                  child: Text(
                    'Вставка Markdown-статьи',
                    style: TextStyle(color: Color(0xFFFFF9C4), fontSize: 16, fontWeight: FontWeight.bold),
                  ),
                ),
                IconButton(
                  icon: const Icon(Icons.close_rounded, color: Color(0xFF8C93B8)),
                  onPressed: () => Navigator.pop(ctx),
                ),
              ],
            ),
            const SizedBox(height: 8),
            const Text(
              'Вставьте сюда текст от нейросети с заголовками ## ЯДРО, ## ОРАКУЛ, ## ТЕНЬ, ## ВОПРОС, ## ЖЕСТ:',
              style: TextStyle(color: Color(0xFFECEFF1), fontSize: 12),
            ),
            const SizedBox(height: 12),
            TextField(
              controller: controller,
              maxLines: 8,
              style: const TextStyle(color: Color(0xFFFFF9C4), fontSize: 13, height: 1.4),
              decoration: InputDecoration(
                filled: true,
                fillColor: const Color(0xFF1E2238),
                hintText: '## ЯДРО\nФормула...\n\n## ОРАКУЛ\nСтатья...',
                hintStyle: TextStyle(color: Colors.white.withOpacity(0.3)),
                border: OutlineInputBorder(borderRadius: BorderRadius.circular(14), borderSide: BorderSide.none),
              ),
            ),
            const SizedBox(height: 14),
            ElevatedButton.icon(
              style: ElevatedButton.styleFrom(
                backgroundColor: const Color(0xFFA5D6A7),
                foregroundColor: const Color(0xFF0C0E1A),
                padding: const EdgeInsets.symmetric(vertical: 12),
                shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
              ),
              icon: const Icon(Icons.auto_fix_high_rounded, size: 18),
              label: const Text(
                'Распознать и применить к полям',
                style: TextStyle(fontWeight: FontWeight.w900, fontSize: 13),
              ),
              onPressed: () {
                final input = controller.text.trim();
                Navigator.pop(ctx);
                if (input.isEmpty) return;
                final blocks = _parseRevisionBlocks(input);
                if (blocks.isEmpty) {
                  ScaffoldMessenger.of(context).showSnackBar(
                    const SnackBar(content: Text('Не удалось найти размеченные блоки (## ЯДРО, ## ОРАКУЛ, и т.д.)')),
                  );
                } else {
                  _showImportPreviewModal(blocks, rawText: input, title: 'Распознанные блоки статьи');
                }
              },
            ),
          ],
        ),
      ),
    );
  }

  void _showImportPreviewModal(Map<String, String> blocks, {String? rawText, String title = 'Импорт из Markdown'}) {
    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      backgroundColor: const Color(0xFF151829),
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(24)),
      ),
      builder: (ctx) => DraggableScrollableSheet(
        initialChildSize: 0.82,
        minChildSize: 0.5,
        maxChildSize: 0.95,
        expand: false,
        builder: (_, scrollController) => Padding(
          padding: const EdgeInsets.fromLTRB(16, 12, 16, 20),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Center(
                child: Container(
                  width: 40,
                  height: 4,
                  margin: const EdgeInsets.only(bottom: 12),
                  decoration: BoxDecoration(
                    color: const Color(0xFF3949AB),
                    borderRadius: BorderRadius.circular(2),
                  ),
                ),
              ),
              Row(
                children: [
                  const GradientStar(size: 20),
                  const SizedBox(width: 8),
                  Expanded(
                    child: Text(
                      title,
                      style: const TextStyle(
                        color: Color(0xFFFFF9C4),
                        fontSize: 16,
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                  ),
                  Container(
                    padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
                    decoration: BoxDecoration(
                      color: const Color(0xFF2E7D32).withOpacity(0.3),
                      borderRadius: BorderRadius.circular(8),
                      border: Border.all(color: const Color(0xFF81C784)),
                    ),
                    child: Text(
                      '${blocks.length}/5 блоков',
                      style: const TextStyle(color: Color(0xFFA5D6A7), fontSize: 11, fontWeight: FontWeight.bold),
                    ),
                  ),
                  const SizedBox(width: 4),
                  IconButton(
                    icon: const Icon(Icons.close_rounded, color: Color(0xFF8C93B8)),
                    onPressed: () => Navigator.pop(ctx),
                  ),
                ],
              ),
              const SizedBox(height: 8),
              const Text(
                'Проверьте распознанные секции. При нажатии «Применить» они мгновенно заполнят форму знака.',
                style: TextStyle(color: Color(0xFFECEFF1), fontSize: 12, height: 1.35),
              ),
              const SizedBox(height: 12),
              Expanded(
                child: ListView(
                  controller: scrollController,
                  children: [
                    if (blocks.containsKey('ЯДРО'))
                      _buildAiBlockPreview('✨ ЯДРО', blocks['ЯДРО']!, const Color(0xFFFFD54F)),
                    if (blocks.containsKey('ОРАКУЛ'))
                      _buildAiBlockPreview('📖 ОРАКУЛ / СТАТЬЯ', blocks['ОРАКУЛ']!, const Color(0xFF64B5F6)),
                    if (blocks.containsKey('ТЕНЬ'))
                      _buildAiBlockPreview('🌑 ТЕНЬ', blocks['ТЕНЬ']!, const Color(0xFFE57373)),
                    if (blocks.containsKey('ВОПРОС'))
                      _buildAiBlockPreview('❓ ВОПРОС', blocks['ВОПРОС']!, const Color(0xFFBA68C8)),
                    if (blocks.containsKey('ЖЕСТ'))
                      _buildAiBlockPreview('⚡ ЖЕСТ', blocks['ЖЕСТ']!, const Color(0xFF81C784)),
                    if (blocks.containsKey('КУЛЬТУРЫ'))
                      _buildAiBlockPreview(
                        '🌍 КУЛЬТУРЫ (${parseCulturesBlock(blocks['КУЛЬТУРЫ']!).length} ветвей)',
                        blocks['КУЛЬТУРЫ']!,
                        const Color(0xFFFFB74D),
                      ),
                  ],
                ),
              ),
              const SizedBox(height: 12),
              Row(
                children: [
                  if (rawText != null)
                    Expanded(
                      flex: 2,
                      child: OutlinedButton(
                        style: OutlinedButton.styleFrom(
                          foregroundColor: const Color(0xFF80DEEA),
                          side: const BorderSide(color: Color(0xFF80DEEA)),
                          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
                          padding: const EdgeInsets.symmetric(vertical: 12),
                        ),
                        onPressed: () {
                          Navigator.pop(ctx);
                          _showManualMarkdownInputDialog(initialText: rawText);
                        },
                        child: const Text('Сырой MD', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 12)),
                      ),
                    ),
                  if (rawText != null) const SizedBox(width: 8),
                  Expanded(
                    flex: 3,
                    child: ElevatedButton.icon(
                      style: ElevatedButton.styleFrom(
                        backgroundColor: const Color(0xFFFFD54F),
                        foregroundColor: const Color(0xFF0C0E1A),
                        padding: const EdgeInsets.symmetric(vertical: 12),
                        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
                      ),
                      icon: const Icon(Icons.check_circle_rounded, size: 18),
                      label: const Text(
                        'Применить к полям',
                        style: TextStyle(fontWeight: FontWeight.w900, fontSize: 13),
                      ),
                      onPressed: () {
                        setState(() {
                          if (blocks.containsKey('ЯДРО')) _coreController.text = blocks['ЯДРО']!;
                          if (blocks.containsKey('ОРАКУЛ')) _oracleController.text = blocks['ОРАКУЛ']!;
                          if (blocks.containsKey('ТЕНЬ')) _shadowController.text = blocks['ТЕНЬ']!;
                          if (blocks.containsKey('ВОПРОС')) _asksController.text = blocks['ВОПРОС']!;
                          if (blocks.containsKey('ЖЕСТ')) _stepController.text = blocks['ЖЕСТ']!;
          if (blocks.containsKey('КУЛЬТУРЫ')) _culturesController.text = formatCulturesBlock(parseCulturesBlock(blocks['КУЛЬТУРЫ']!));
                        });
                        Navigator.pop(ctx);
                        HapticFeedback.mediumImpact();
                        ScaffoldMessenger.of(context).showSnackBar(
                          SnackBar(
                            content: Row(
                              children: [
                                const Icon(Icons.check_circle_rounded, color: Color(0xFF81C784), size: 20),
                                const SizedBox(width: 10),
                                Expanded(child: Text('Применено ${blocks.length} блоков статьи к знаку!')),
                              ],
                            ),
                            behavior: SnackBarBehavior.floating,
                            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
                          ),
                        );
                      },
                    ),
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }

  Future<void> _generateAiRevision() async {
    setState(() => _isGeneratingAi = true);
    HapticFeedback.mediumImpact();

    try {
      final prompt = _buildPrePrompt();
      final response = await _aiService.generateSymbolRevision(prePrompt: prompt);

      if (!mounted) return;
      setState(() => _isGeneratingAi = false);

      if (response.trim().isEmpty) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Не удалось получить ответ от ИИ. Попробуйте скопировать предпромпт вручную.')),
        );
        return;
      }

      final blocks = _parseRevisionBlocks(response);
      _showImportPreviewModal(blocks, rawText: response, title: 'Предложенное ИИ-обогащение');
    } catch (e) {
      if (mounted) {
        setState(() => _isGeneratingAi = false);
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Ошибка ИИ: $e')),
        );
      }
    }
  }
  Widget _buildAiBlockPreview(String title, String content, Color accent) {
    return Container(
      margin: const EdgeInsets.only(bottom: 12),
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: const Color(0xFF1E2238),
        borderRadius: BorderRadius.circular(12),
        border: Border.all(color: accent.withValues(alpha: 0.5)),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                width: 8,
                height: 8,
                decoration: BoxDecoration(color: accent, shape: BoxShape.circle),
              ),
              const SizedBox(width: 6),
              Text(
                title,
                style: TextStyle(color: accent, fontSize: 12, fontWeight: FontWeight.bold),
              ),
            ],
          ),
          const SizedBox(height: 6),
          Text(
            content,
            maxLines: 6,
            overflow: TextOverflow.ellipsis,
            style: const TextStyle(color: Color(0xFFE0E2EC), fontSize: 13, height: 1.45),
          ),
        ],
      ),
    );
  }

  Future<void> _save() async {
    if (!_formKey.currentState!.validate()) return;

    setState(() => _isSaving = true);
    HapticFeedback.mediumImpact();

    await _repo.saveCustomEdit(
      widget.word.word,
      core: _coreController.text,
      oracle: _oracleController.text,
      shadow: _shadowController.text,
      asks: _asksController.text,
      step: _stepController.text,
      cultures: parseCulturesBlock(_culturesController.text),
    );

    if (!mounted) return;
    setState(() => _isSaving = false);

    Navigator.pop(context, true);
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(
        content: Row(
          children: [
            const GradientStar(size: 18),
            const SizedBox(width: 10),
            Expanded(child: Text('Канон «${widget.word.word}» успешно обновлен!')),
          ],
        ),
        backgroundColor: const Color(0xFF2E7D32),
        behavior: SnackBarBehavior.floating,
      ),
    );
  }

  Future<void> _confirmReset() async {
    final confirmed = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        backgroundColor: const Color(0xFF1E2238),
        title: const Text('Сбросить к канону релиза?', style: TextStyle(color: Color(0xFFFFF9C4))),
        content: const Text(
          'Ваша персональная редакция этого знака будет удалена, вернётся оригинальный текст из базы.',
          style: TextStyle(color: Color(0xFFB0BEC5)),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(ctx, false),
            child: const Text('Отмена', style: TextStyle(color: Color(0xFF9FA8DA))),
          ),
          FilledButton(
            style: FilledButton.styleFrom(backgroundColor: const Color(0xFFE57373)),
            onPressed: () => Navigator.pop(ctx, true),
            child: const Text('Сбросить'),
          ),
        ],
      ),
    );

    if (confirmed == true) {
      setState(() => _isSaving = true);
      await _repo.resetCustomEdit(widget.word.word);
      if (!mounted) return;
      setState(() => _isSaving = false);
      Navigator.pop(context, true);
    }
  }

  @override
  Widget build(BuildContext context) {
    final w = widget.word;

    return Scaffold(
      backgroundColor: const Color(0xFF0C0E1A),
      appBar: AppBar(
        title: Text(
          'Редактор: ${w.word.toUpperCase()}',
          style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 18),
        ),
        actions: [
          IconButton(
            tooltip: '78-полюсный паспорт (Ручной обогатитель)',
            icon: const Icon(Icons.badge_outlined, color: Color(0xFFFFD54F)),
            onPressed: () {
              Navigator.of(context).push(
                MaterialPageRoute(builder: (_) => ManualDiveScreen(initialWord: widget.word)),
              );
            },
          ),
          IconButton(
            tooltip: 'Скопировать промпт на обогащение',
            icon: const Icon(Icons.copy_all_rounded, color: Color(0xFFFFD54F)),
            onPressed: _copyPrePrompt,
          ),
          IconButton(
            tooltip: 'Вставить из Markdown',
            icon: const Icon(Icons.paste_rounded, color: Color(0xFFA5D6A7)),
            onPressed: _pasteFromMarkdownClipboard,
          ),
          IconButton(
            tooltip: 'Сгенерировать через ИИ',
            icon: const Icon(Icons.auto_awesome_rounded, color: Color(0xFF80DEEA)),
            onPressed: _isGeneratingAi ? null : _generateAiRevision,
          ),
          if (w.isUserEdited)
            IconButton(
              tooltip: 'Сбросить к заводскому канону',
              icon: const Icon(Icons.restore_rounded, color: Color(0xFFE57373)),
              onPressed: _isSaving ? null : _confirmReset,
            ),
          IconButton(
            tooltip: 'Сохранить',
            icon: const Icon(Icons.check_rounded, color: Color(0xFF81C784), size: 26),
            onPressed: _isSaving ? null : _save,
          ),
        ],
      ),
      body: Form(
        key: _formKey,
        child: ListView(
          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
          children: [
            // Prominent Pre-Prompt Context Banner
            Container(
              padding: const EdgeInsets.all(14),
              decoration: BoxDecoration(
                gradient: const LinearGradient(
                  colors: [Color(0xFF281E44), Color(0xFF14172B)],
                  begin: Alignment.topLeft,
                  end: Alignment.bottomRight,
                ),
                borderRadius: BorderRadius.circular(18),
                border: Border.all(color: const Color(0xFFFFD54F).withOpacity(0.5)),
                boxShadow: [
                  BoxShadow(
                    color: const Color(0xFFFFD54F).withOpacity(0.08),
                    blurRadius: 10,
                  ),
                ],
              ),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Row(
                    children: [
                      const GradientStar(size: 18),
                      const SizedBox(width: 8),
                      const Expanded(
                        child: Text(
                          'ПРЕДПРОМПТ ДЛЯ НЕЙРОСЕТЕЙ (ИИ)',
                          style: TextStyle(
                            color: Color(0xFFFFD54F),
                            fontSize: 11.5,
                            fontWeight: FontWeight.w900,
                            letterSpacing: 1.0,
                          ),
                        ),
                      ),
                      Container(
                        padding: const EdgeInsets.symmetric(horizontal: 7, vertical: 2),
                        decoration: BoxDecoration(
                          color: const Color(0xFF3B2B5E),
                          borderRadius: BorderRadius.circular(6),
                        ),
                        child: Text(
                          '№${w.formattedSessionNumber}',
                          style: const TextStyle(color: Color(0xFFFFF9C4), fontSize: 10, fontWeight: FontWeight.bold),
                        ),
                      ),
                    ],
                  ),
                  const SizedBox(height: 8),
                  const Text(
                    'Содержит всю текущую информацию о знаке (ядро, оракул, тень, вопрос, жест, слои традиций), чтобы при формулировании правок не повторяться, а углублять канон.',
                    style: TextStyle(color: Color(0xFFECEFF1), fontSize: 12, height: 1.35),
                  ),
                  const SizedBox(height: 12),
                  Row(
                    children: [
                      Expanded(
                        child: OutlinedButton.icon(
                          style: OutlinedButton.styleFrom(
                            foregroundColor: const Color(0xFFFFD54F),
                            side: BorderSide(color: const Color(0xFFFFD54F).withValues(alpha: 0.6)),
                            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
                            padding: const EdgeInsets.symmetric(vertical: 8),
                          ),
                          icon: const Icon(Icons.copy_rounded, size: 14),
                          label: const Text('Скопировать промпт', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 11.5)),
                          onPressed: _copyPrePrompt,
                        ),
                      ),
                      const SizedBox(width: 8),
                      Expanded(
                        child: OutlinedButton.icon(
                          style: OutlinedButton.styleFrom(
                            foregroundColor: const Color(0xFF80DEEA),
                            side: BorderSide(color: const Color(0xFF80DEEA).withValues(alpha: 0.6)),
                            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
                            padding: const EdgeInsets.symmetric(vertical: 8),
                          ),
                          icon: const Icon(Icons.visibility_rounded, size: 14),
                          label: const Text('Просмотр промпта', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 11.5)),
                          onPressed: _showPrePromptViewer,
                        ),
                      ),
                    ],
                  ),
                  const SizedBox(height: 8),
                  Row(
                    children: [
                      Expanded(
                        child: ElevatedButton.icon(
                          style: ElevatedButton.styleFrom(
                            backgroundColor: const Color(0xFF1B3D2F),
                            foregroundColor: const Color(0xFFA5D6A7),
                            side: const BorderSide(color: Color(0xFF81C784)),
                            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
                            padding: const EdgeInsets.symmetric(vertical: 9),
                          ),
                          icon: const Icon(Icons.paste_rounded, size: 15, color: Color(0xFFA5D6A7)),
                          label: const Text('Вставить из Markdown', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 11.5)),
                          onPressed: _pasteFromMarkdownClipboard,
                        ),
                      ),
                      const SizedBox(width: 8),
                      Expanded(
                        child: ElevatedButton.icon(
                          style: ElevatedButton.styleFrom(
                            backgroundColor: const Color(0xFF382959),
                            foregroundColor: const Color(0xFFFFF9C4),
                            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
                            padding: const EdgeInsets.symmetric(vertical: 9),
                          ),
                          icon: _isGeneratingAi
                              ? const SizedBox(
                                  width: 14,
                                  height: 14,
                                  child: CircularProgressIndicator(strokeWidth: 2, color: Color(0xFFFFD54F)),
                                )
                              : const Icon(Icons.auto_awesome_rounded, size: 15, color: Color(0xFFFFD54F)),
                          label: const Text('ИИ-обогащение', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 11.5)),
                          onPressed: _isGeneratingAi ? null : _generateAiRevision,
                        ),
                      ),
                    ],
                  ),
                ],
              ),
            ),
            const SizedBox(height: 16),

            _buildSectionField(
              title: '✨ ЯДРО / ФОРМУЛА ЗАКОНА (Core)',
              hint: 'Краткая суть принципа и природы знака (1-2 предложения)',
              controller: _coreController,
              minLines: 2,
              maxLines: 4,
              accentColor: const Color(0xFFFFD54F),
            ),
            const SizedBox(height: 16),

            _buildSectionField(
              title: '📖 ОРАКУЛ / ТОЛКОВАНИЕ (Oracle)',
              hint: 'Развернутое символическое и практическое прочтение знака в раскладе',
              controller: _oracleController,
              minLines: 6,
              maxLines: 14,
              accentColor: const Color(0xFF64B5F6),
            ),
            const SizedBox(height: 16),

            _buildSectionField(
              title: '🌑 ТЕНЬ / ИСКАЖЕНИЕ (Shadow)',
              hint: 'Ловушка знака, избыток или дефицит принципа, скрытая опасность',
              controller: _shadowController,
              minLines: 2,
              maxLines: 4,
              accentColor: const Color(0xFFE57373),
            ),
            const SizedBox(height: 16),

            _buildSectionField(
              title: '❓ ВОПРОС / ЭКСПЕРТИЗА (Asks)',
              hint: 'Экзистенциальный вопрос вопрошающему, проверка честности',
              controller: _asksController,
              minLines: 2,
              maxLines: 4,
              accentColor: const Color(0xFFBA68C8),
            ),
            const SizedBox(height: 16),

            _buildSectionField(
              title: '⚡ РИТУАЛЬНЫЙ ЖЕСТ / ДЕЙСТВИЕ (Step)',
              hint: 'Конкретное заземляющее действие или практика в физическом мире',
              controller: _stepController,
              minLines: 2,
              maxLines: 4,
              accentColor: const Color(0xFF81C784),
            ),
            const SizedBox(height: 16),

            _buildSectionField(
              title: '🌍 КУЛЬТУРЫ ЧЕЛОВЕЧЕСТВА (Cultures)',
              hint: '### Шумер и Месопотамия\nТекст…\n\n### Древний Египет\nТекст…\n\nПусто — ветви извлекаются из ОРАКУЛА автоматически',
              controller: _culturesController,
              minLines: 4,
              maxLines: 14,
              accentColor: const Color(0xFFFFB74D),
            ),
            const SizedBox(height: 24),

            ElevatedButton.icon(
              style: ElevatedButton.styleFrom(
                backgroundColor: const Color(0xFF2E7D32),
                foregroundColor: Colors.white,
                padding: const EdgeInsets.symmetric(vertical: 14),
                shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
              ),
              onPressed: _isSaving ? null : _save,
              icon: _isSaving
                  ? const SizedBox(
                      width: 18,
                      height: 18,
                      child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white),
                    )
                  : const Icon(Icons.save_rounded),
              label: const Text(
                'Сохранить изменения знака',
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 16),
              ),
            ),

            if (w.isUserEdited) ...[
              const SizedBox(height: 12),
              OutlinedButton.icon(
                style: OutlinedButton.styleFrom(
                  foregroundColor: const Color(0xFFE57373),
                  side: const BorderSide(color: Color(0xFFE57373)),
                  padding: const EdgeInsets.symmetric(vertical: 12),
                  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
                ),
                onPressed: _isSaving ? null : _confirmReset,
                icon: const Icon(Icons.restore_rounded),
                label: const Text('Сбросить к канону из релиза'),
              ),
            ],
            const SizedBox(height: 20),
          ],
        ),
      ),
    );
  }

  Widget _buildSectionField({
    required String title,
    required String hint,
    required TextEditingController controller,
    required int minLines,
    required int maxLines,
    required Color accentColor,
  }) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Row(
          children: [
            Container(
              width: 4,
              height: 16,
              decoration: BoxDecoration(
                color: accentColor,
                borderRadius: BorderRadius.circular(2),
              ),
            ),
            const SizedBox(width: 8),
            Text(
              title,
              style: TextStyle(
                color: accentColor,
                fontSize: 13,
                fontWeight: FontWeight.bold,
                letterSpacing: 0.5,
              ),
            ),
          ],
        ),
        const SizedBox(height: 8),
        TextFormField(
          controller: controller,
          minLines: minLines,
          maxLines: maxLines,
          style: const TextStyle(
            color: Color(0xFFECEFF1),
            fontSize: 14,
            height: 1.45,
          ),
          decoration: InputDecoration(
            hintText: hint,
            hintStyle: const TextStyle(color: Color(0xFF546E7A), fontSize: 13),
            filled: true,
            fillColor: const Color(0xFF151829),
            contentPadding: const EdgeInsets.all(14),
            border: OutlineInputBorder(
              borderRadius: BorderRadius.circular(14),
              borderSide: const BorderSide(color: Color(0xFF263238)),
            ),
            enabledBorder: OutlineInputBorder(
              borderRadius: BorderRadius.circular(14),
              borderSide: BorderSide(color: accentColor.withOpacity(0.3)),
            ),
            focusedBorder: OutlineInputBorder(
              borderRadius: BorderRadius.circular(14),
              borderSide: BorderSide(color: accentColor, width: 1.5),
            ),
          ),
        ),
      ],
    );
  }
}