import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import '../../../core/network/api_client.dart';
import '../../../core/theme/app_theme.dart';
import '../repositories/admin_repository.dart';
import 'service_settings_form.dart';

class ServiceConfigMeta {
  final String key;
  final String displayName;
  final String description;
  final IconData icon;
  final Color accentColor;

  const ServiceConfigMeta({
    required this.key,
    required this.displayName,
    required this.description,
    required this.icon,
    required this.accentColor,
  });
}

class PipelineSettingsWidget extends StatefulWidget {
  final ApiClient? apiClient;
  final AdminRepository? repository;

  const PipelineSettingsWidget({super.key, this.apiClient, this.repository});

  @override
  State<PipelineSettingsWidget> createState() => _PipelineSettingsWidgetState();
}

class _PipelineSettingsWidgetState extends State<PipelineSettingsWidget> {
  late final AdminRepository _repository;
  String _selectedServiceKey = 'FinlyticAssets';
  bool _isLoading = false;
  bool _isSaving = false;

  static const List<ServiceConfigMeta> _services = [
    ServiceConfigMeta(
      key: 'FinlyticAssets',
      displayName: 'Asset Katalog & Logos',
      description: 'Verwaltet ISIN Asset-Stammdaten & Trade Republic Logo Fetcher',
      icon: Icons.inventory_2_outlined,
      accentColor: Color(0xFF00E5FF),
    ),
    ServiceConfigMeta(
      key: 'FinlyticNews',
      displayName: 'News Scraper & AI',
      description: 'RSS Web Scraper Intervall & Entwurf-Retention',
      icon: Icons.newspaper_outlined,
      accentColor: Color(0xFF3B82F6),
    ),
    ServiceConfigMeta(
      key: 'FinlyticTechnicalAnalysis',
      displayName: 'Technische Analyse',
      description: 'EMA/SMA Perioden, RSI Grenzwerte & Supertrend Multiplikator',
      icon: Icons.show_chart_outlined,
      accentColor: Color(0xFF8B5CF6),
    ),
    ServiceConfigMeta(
      key: 'FinlyticSentiment',
      displayName: 'Sentiment NLP',
      description: 'NLP Vertrauens-Schwellenwerte & Text-Batching',
      icon: Icons.psychology_outlined,
      accentColor: Color(0xFFEC4899),
    ),
    ServiceConfigMeta(
      key: 'FinlyticEngine',
      displayName: 'Trading Engine',
      description: 'Strategy Screener, Trade Lifecycle & Risikomanagement',
      icon: Icons.candlestick_chart_outlined,
      accentColor: Color(0xFF10B981),
    ),
    ServiceConfigMeta(
      key: 'FinlyticFundamentals',
      displayName: 'Fundamentaldaten',
      description: 'Cache TTL Dauer & Yahoo Finance Fallback',
      icon: Icons.corporate_fare_outlined,
      accentColor: Color(0xFF06B6D4),
    ),
    ServiceConfigMeta(
      key: 'FinlyticBot',
      displayName: 'FinlyticBot (Paper)',
      description: 'Alpaca Paper Trading, Risikomanagement & Sizing Engine',
      icon: Icons.smart_toy_outlined,
      accentColor: Color(0xFF10B981),
    ),
  ];

  final Map<String, Map<String, TextEditingController>> _controllers = {
    'FinlyticAssets': {
      'TradeRepublicMaxRequestPageSize': TextEditingController(text: '100'),
      'AssetUpdateTypeDelay': TextEditingController(text: '0'),
      'BatchAssetUpdateDelay': TextEditingController(text: '5'),
    },
    'FinlyticNews': {
      'ScrapingIntervalMinutes': TextEditingController(text: '15'),
      'PollingFrequencyMinutes': TextEditingController(text: '15'),
      'ArticleRetentionDays': TextEditingController(text: '90'),
      'DefaultPageSize': TextEditingController(text: '20'),
    },
    'FinlyticTechnicalAnalysis': {
      'EmaShortPeriod': TextEditingController(text: '20'),
      'SmaMediumPeriod': TextEditingController(text: '50'),
      'SmaLongPeriod': TextEditingController(text: '200'),
      'RsiOverboughtLimit': TextEditingController(text: '70'),
      'RsiOversoldLimit': TextEditingController(text: '30'),
      'SupertrendMultiplier': TextEditingController(text: '3.0'),
    },
    'FinlyticSentiment': {
      'MinConfidenceScore': TextEditingController(text: '0.70'),
      'MaxBatchSize': TextEditingController(text: '50'),
    },
    'FinlyticEngine': {
      'Engine.MinCompositeScore': TextEditingController(text: '75.0'),
      'Engine.WeightTechnical': TextEditingController(text: '0.45'),
      'Engine.WeightSentiment': TextEditingController(text: '0.35'),
      'Engine.WeightFundamental': TextEditingController(text: '0.20'),
      'Engine.EarningsLockoutDays': TextEditingController(text: '2'),
      'Engine.MinDerivativeLeverage': TextEditingController(text: '5.0'),
      'Engine.TargetDefaultLeverage': TextEditingController(text: '7.0'),
      'Engine.KnockOutSafetyBufferPercent': TextEditingController(text: '2.0'),
      'Engine.EnableAiValidation': TextEditingController(text: 'true'),
      'Engine.EnablePaperTradingBot': TextEditingController(text: 'false'),
      'Engine.PollingIntervalSeconds': TextEditingController(text: '120'),
      'Engine.MonitoringIntervalSeconds': TextEditingController(text: '60'),
    },
    'FinlyticFundamentals': {
      'CacheTtlHours': TextEditingController(text: '24'),
      'EnableYahooFallback': TextEditingController(text: 'true'),
    },
    'FinlyticBot': {
      'Alpaca.KeyId': TextEditingController(text: ''),
      'Alpaca.SecretKey': TextEditingController(text: ''),
      'Alpaca.IsPaper': TextEditingController(text: 'true'),
      'Bot.EnableAutoExecution': TextEditingController(text: 'true'),
      'Bot.RiskPerTradePercent': TextEditingController(text: '1.0'),
      'Bot.MaxPositionAllocationPercent': TextEditingController(text: '20.0'),
      'Bot.MaxConcurrentPositions': TextEditingController(text: '5'),
      'Bot.DailyLossLimitPercent': TextEditingController(text: '3.0'),
      'Bot.MonitoringIntervalSeconds': TextEditingController(text: '15'),
    },
  };

  bool _initialized = false;

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    if (!_initialized) {
      _initialized = true;
      final client = widget.apiClient ?? context.read<ApiClient>();
      _repository = widget.repository ?? AdminRepository(apiClient: client);
      _fetchSettings();
    }
  }

  Future<void> _fetchSettings() async {
    setState(() => _isLoading = true);
    try {
      final settings = await _repository.fetchSettings();
      settings.forEach((svc, items) {
        _controllers.putIfAbsent(svc, () => {});
        for (final s in items) {
          if (_controllers[svc]!.containsKey(s.key)) {
            _controllers[svc]![s.key]!.text = s.value;
          } else {
            _controllers[svc]![s.key] = TextEditingController(text: s.value);
          }
        }
      });
    } catch (_) {
    } finally {
      if (mounted) setState(() => _isLoading = false);
    }
  }

  Future<void> _saveSettings() async {
    setState(() => _isSaving = true);
    try {
      final currentSvcControllers = _controllers[_selectedServiceKey] ?? {};
      final payload = <String, String>{};
      currentSvcControllers.forEach((k, v) {
        payload[k] = v.text;
      });

      await _repository.updateServiceSettings(_selectedServiceKey, payload);

      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Row(
              children: [
                const Icon(Icons.check_circle_outline, color: Colors.black),
                const SizedBox(width: 8),
                Expanded(
                  child: Text(
                    'Einstellungen für $_selectedServiceKey gespeichert & synchronisiert.',
                    style: const TextStyle(color: Colors.black, fontWeight: FontWeight.w600),
                  ),
                ),
              ],
            ),
            backgroundColor: AppTheme.primaryEmerald,
            behavior: SnackBarBehavior.floating,
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
          ),
        );
      }
    } catch (ex) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text('Fehler beim Speichern: $ex'),
            backgroundColor: AppTheme.accentRed,
            behavior: SnackBarBehavior.floating,
          ),
        );
      }
    } finally {
      if (mounted) setState(() => _isSaving = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    final activeService = _services.firstWhere((s) => s.key == _selectedServiceKey, orElse: () => _services.first);
    final activeControllers = _controllers[_selectedServiceKey] ?? {};

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        SingleChildScrollView(
          scrollDirection: Axis.horizontal,
          child: Row(
            children: _services.map((svc) {
              final isSelected = svc.key == _selectedServiceKey;
              return Padding(
                padding: const EdgeInsets.only(right: 8, bottom: 12),
                child: InkWell(
                  onTap: () => setState(() => _selectedServiceKey = svc.key),
                  borderRadius: BorderRadius.circular(12),
                  child: Container(
                    padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
                    decoration: BoxDecoration(
                      color: isSelected ? svc.accentColor.withValues(alpha: 0.15) : AppTheme.glassSurface,
                      borderRadius: BorderRadius.circular(12),
                      border: Border.all(
                        color: isSelected ? svc.accentColor : AppTheme.glassBorder,
                        width: isSelected ? 1.5 : 1,
                      ),
                    ),
                    child: Row(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        Icon(svc.icon, size: 16, color: isSelected ? svc.accentColor : AppTheme.textMuted),
                        const SizedBox(width: 8),
                        Text(
                          svc.displayName,
                          style: TextStyle(
                            color: isSelected ? Colors.white : AppTheme.textMuted,
                            fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
                            fontSize: 12,
                          ),
                        ),
                      ],
                    ),
                  ),
                ),
              );
            }).toList(),
          ),
        ),
        const SizedBox(height: 12),
        Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(activeService.displayName, style: const TextStyle(fontSize: 16, fontWeight: FontWeight.bold, color: Colors.white)),
                const SizedBox(height: 2),
                Text(activeService.description, style: TextStyle(fontSize: 12, color: AppTheme.textMuted)),
              ],
            ),
            ElevatedButton.icon(
              onPressed: _isSaving ? null : _saveSettings,
              icon: _isSaving
                  ? const SizedBox(width: 14, height: 14, child: CircularProgressIndicator(strokeWidth: 2, color: Colors.black))
                  : const Icon(Icons.save_outlined, size: 16),
              label: Text(_isSaving ? 'Speichere...' : 'Speichern'),
              style: ElevatedButton.styleFrom(
                backgroundColor: AppTheme.primaryEmerald,
                foregroundColor: Colors.black,
                padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
              ),
            ),
          ],
        ),
        const SizedBox(height: 14),
        if (_isLoading)
          Center(child: CircularProgressIndicator(color: AppTheme.primaryEmerald))
        else
          ServiceSettingsForm(
            controllers: activeControllers,
            accentColor: activeService.accentColor,
          ),
      ],
    );
  }
}