import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import '../../database/database.dart';
import '../../models/motorcycle_models.dart';
import '../../core/responsive/responsive_layout.dart';
import '../../core/theme/theme_extensions.dart';
import 'widgets/motorcycle_photo.dart';
import 'garage_providers.dart';

class MotorcycleDetailScreen extends ConsumerWidget {
  final int motorcycleId;

  const MotorcycleDetailScreen({super.key, required this.motorcycleId});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final bikesAsync = ref.watch(garageMotorcyclesStreamProvider);
    final statsAsync = ref.watch(motorcyclePerformanceStatsProvider(motorcycleId));
    final colors = context.motorColors;
    final theme = Theme.of(context);

    return bikesAsync.when(
      loading: () => const Scaffold(body: Center(child: CircularProgressIndicator())),
      error: (err, _) => Scaffold(body: Center(child: Text('Error: $err'))),
      data: (bikes) {
        final bike = bikes.firstWhere(
          (b) => b.id == motorcycleId,
          orElse: () => GarageMotorcycle(
            id: 0,
            year: 2024,
            makeId: '',
            makeName: 'Unknown',
            modelId: '',
            modelName: 'Unknown',
            isDefault: false,
            dateAdded: DateTime.now(),
            lastUpdated: DateTime.now(),
          ),
        );

        if (bike.id == 0) {
          return Scaffold(
            appBar: AppBar(),
            body: const Center(child: Text('Motorcycle not found')),
          );
        }

        MotorcycleSpecification? spec;
        if (bike.specificationJson != null) {
          try {
            spec = MotorcycleSpecification.fromJson(json.decode(bike.specificationJson!));
          } catch (_) {}
        }

        return Scaffold(
          appBar: AppBar(
            title: FittedBox(
              fit: BoxFit.scaleDown,
              alignment: Alignment.centerLeft,
              child: Text(
                '${bike.year} ${bike.makeName} ${bike.modelName}',
                style: const TextStyle(fontWeight: FontWeight.bold),
              ),
            ),
            actions: [
              IconButton(
                icon: const Icon(Icons.edit),
                tooltip: 'Edit Nickname',
                onPressed: () => _showEditNicknameDialog(context, ref, bike),
              ),
              IconButton(
                icon: Icon(Icons.delete_outline, color: colors.raceRed),
                tooltip: 'Delete Motorcycle',
                onPressed: () => _confirmDelete(context, ref, bike, colors),
              ),
            ],
          ),
          body: ResponsiveLayout(
            builder: (context, responsive) {
              final isWide = responsive.isExpanded || (responsive.isMedium && responsive.isLandscape);

              if (isWide) {
                return SingleChildScrollView(
                  padding: const EdgeInsets.all(16.0),
                  child: Row(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Expanded(
                        flex: 4,
                        child: _buildHeaderCard(context, ref, bike, spec, colors, theme),
                      ),
                      const SizedBox(width: 16),
                      Expanded(
                        flex: 6,
                        child: Column(
                          crossAxisAlignment: CrossAxisAlignment.stretch,
                          children: [
                            _buildMyPerformanceSection(context, statsAsync, spec, colors, theme),
                            const SizedBox(height: 20),
                            _buildSpecificationSheet(context, spec, colors, theme),
                          ],
                        ),
                      ),
                    ],
                  ),
                );
              }

              return SingleChildScrollView(
                padding: const EdgeInsets.all(16.0),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    _buildHeaderCard(context, ref, bike, spec, colors, theme),
                    const SizedBox(height: 20),
                    _buildMyPerformanceSection(context, statsAsync, spec, colors, theme),
                    const SizedBox(height: 20),
                    _buildSpecificationSheet(context, spec, colors, theme),
                    const SizedBox(height: 24),
                  ],
                ),
              );
            },
          ),
        );
      },
    );
  }

  Widget _buildHeaderCard(
    BuildContext context,
    WidgetRef ref,
    GarageMotorcycle bike,
    MotorcycleSpecification? spec,
    MotorSignalThemeColors colors,
    ThemeData theme,
  ) {
    return Card(
      elevation: 2,
      color: colors.surfaceContainer,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(16),
        side: BorderSide(
          color: bike.isDefault ? colors.cyberCyan : colors.outlineVariant,
          width: bike.isDefault ? 1.8 : 1.0,
        ),
      ),
      child: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            MotorcyclePhoto(
              year: bike.year,
              make: bike.makeName,
              model: bike.modelName,
              height: 190,
              borderRadius: BorderRadius.circular(12),
              showAttribution: true,
              fit: BoxFit.cover,
            ),
            const SizedBox(height: 16),
            Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  '${bike.year}',
                  style: TextStyle(
                    fontSize: 14,
                    color: colors.cyberCyan,
                    fontWeight: FontWeight.bold,
                    fontFamily: 'JetBrains Mono',
                  ),
                ),
                Text(
                  '${bike.makeName} ${bike.modelName}'.toUpperCase(),
                  style: TextStyle(
                    fontSize: 20,
                    fontWeight: FontWeight.w900,
                    fontFamily: 'Sora',
                    color: theme.colorScheme.onSurface,
                  ),
                ),
                if (bike.nickname != null && bike.nickname!.isNotEmpty)
                  Padding(
                    padding: const EdgeInsets.only(top: 4.0),
                    child: Text(
                      '"${bike.nickname}"',
                      style: TextStyle(
                        fontSize: 15,
                        fontStyle: FontStyle.italic,
                        color: colors.warningAmber,
                        fontWeight: FontWeight.w600,
                      ),
                    ),
                  ),
              ],
            ),
            const SizedBox(height: 16),
            Divider(color: colors.outlineVariant, height: 1),
            const SizedBox(height: 12),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
              children: [
                _buildHeaderStat(
                  'DISPLACEMENT',
                  spec?.displacementCc != null ? '${spec!.displacementCc!.toStringAsFixed(0)} cc' : '—',
                  theme,
                ),
                _buildHeaderStat(
                  'POWER',
                  spec?.horsepower != null ? '${spec!.horsepower!.toStringAsFixed(0)} HP' : '—',
                  theme,
                ),
                _buildHeaderStat(
                  'TORQUE',
                  spec?.torqueLbFt != null ? '${spec!.torqueLbFt!.toStringAsFixed(1)} lb-ft' : '—',
                  theme,
                ),
              ],
            ),
            const SizedBox(height: 16),
            SizedBox(
              width: double.infinity,
              child: bike.isDefault
                  ? Container(
                      padding: const EdgeInsets.symmetric(vertical: 12),
                      decoration: BoxDecoration(
                        color: colors.cyberCyan.withValues(alpha: 0.15),
                        borderRadius: BorderRadius.circular(8),
                        border: Border.all(color: colors.cyberCyan),
                      ),
                      child: Center(
                        child: Text(
                          'CURRENT MOTORCYCLE',
                          style: TextStyle(
                            fontFamily: 'Sora',
                            fontWeight: FontWeight.bold,
                            letterSpacing: 1.2,
                            color: colors.cyberCyan,
                          ),
                        ),
                      ),
                    )
                  : OutlinedButton(
                      style: OutlinedButton.styleFrom(
                        padding: const EdgeInsets.symmetric(vertical: 12),
                        side: BorderSide(color: colors.cyberCyan),
                        foregroundColor: colors.cyberCyan,
                      ),
                      onPressed: () {
                        ref.read(garageControllerProvider).setDefaultMotorcycle(bike.id);
                        ScaffoldMessenger.of(context).showSnackBar(
                          SnackBar(
                            content: Text(
                              'Set ${bike.makeName} ${bike.modelName} as current motorcycle.',
                            ),
                          ),
                        );
                      },
                      child: const Text(
                        'SET AS CURRENT MOTORCYCLE',
                        style: TextStyle(
                          fontFamily: 'Sora',
                          fontWeight: FontWeight.bold,
                          letterSpacing: 1.2,
                        ),
                      ),
                    ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildHeaderStat(String label, String value, ThemeData theme) {
    return Expanded(
      child: Column(
        children: [
          FittedBox(
            fit: BoxFit.scaleDown,
            child: Text(
              label,
              style: TextStyle(
                fontSize: 9.5,
                color: theme.colorScheme.onSurface.withValues(alpha: 0.5),
                letterSpacing: 1.0,
                fontWeight: FontWeight.w700,
              ),
            ),
          ),
          const SizedBox(height: 4),
          FittedBox(
            fit: BoxFit.scaleDown,
            child: Text(
              value,
              style: TextStyle(
                fontSize: 16,
                fontWeight: FontWeight.bold,
                fontFamily: 'JetBrains Mono',
                color: theme.colorScheme.onSurface,
              ),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildMyPerformanceSection(
    BuildContext context,
    AsyncValue<MotorcycleStats> statsAsync,
    MotorcycleSpecification? spec,
    MotorSignalThemeColors colors,
    ThemeData theme,
  ) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(
          'MY PERFORMANCE',
          style: TextStyle(
            fontFamily: 'Sora',
            fontSize: 16,
            fontWeight: FontWeight.bold,
            color: colors.cyberCyan,
            letterSpacing: 0.8,
          ),
        ),
        const SizedBox(height: 12),
        statsAsync.when(
          loading: () => const Center(child: CircularProgressIndicator()),
          error: (err, _) => Text('Error loading stats: $err'),
          data: (stats) {
            return Column(
              children: [
                Row(
                  children: [
                    Expanded(child: _buildPerfTile('TOTAL RIDES', '${stats.rideCount}', colors, theme)),
                    const SizedBox(width: 12),
                    Expanded(
                      child: _buildPerfTile(
                        'TOTAL DISTANCE',
                        '${stats.totalDistanceMiles.toStringAsFixed(1)} MI',
                        colors,
                        theme,
                      ),
                    ),
                  ],
                ),
                const SizedBox(height: 12),
                Row(
                  children: [
                    Expanded(
                      child: _buildPerfTile(
                        'BEST TOP SPEED',
                        '${stats.topSpeedMph.toStringAsFixed(1)} MPH',
                        colors,
                        theme,
                        published: spec?.claimedTopSpeedMph != null
                            ? '~${spec!.claimedTopSpeedMph!.toStringAsFixed(0)} MPH'
                            : null,
                      ),
                    ),
                    const SizedBox(width: 12),
                    Expanded(
                      child: _buildPerfTile(
                        'BEST 0–60',
                        stats.best0to60Ms != null ? '${(stats.best0to60Ms! / 1000.0).toStringAsFixed(2)} s' : '—',
                        colors,
                        theme,
                        published: spec?.claimedZeroToSixtySec != null
                            ? '~${spec!.claimedZeroToSixtySec!.toStringAsFixed(1)} s'
                            : null,
                      ),
                    ),
                  ],
                ),
                const SizedBox(height: 12),
                Row(
                  children: [
                    Expanded(
                      child: _buildPerfTile(
                        'MAX LEAN',
                        '${stats.maxLean.toStringAsFixed(1)}°',
                        colors,
                        theme,
                      ),
                    ),
                    const SizedBox(width: 12),
                    Expanded(
                      child: _buildPerfTile(
                        'MAX ACCEL G',
                        '${stats.maxAccelG.toStringAsFixed(2)} G',
                        colors,
                        theme,
                      ),
                    ),
                  ],
                ),
              ],
            );
          },
        ),
      ],
    );
  }

  Widget _buildPerfTile(
    String label,
    String value,
    MotorSignalThemeColors colors,
    ThemeData theme, {
    String? published,
  }) {
    return Container(
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: colors.surfaceContainer,
        borderRadius: BorderRadius.circular(12),
        border: Border.all(color: colors.outlineVariant, width: 1.2),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            label,
            style: TextStyle(
              fontSize: 10,
              color: theme.colorScheme.onSurface.withValues(alpha: 0.5),
              fontWeight: FontWeight.w700,
              letterSpacing: 0.8,
            ),
          ),
          const SizedBox(height: 4),
          FittedBox(
            fit: BoxFit.scaleDown,
            child: Text(
              value,
              style: TextStyle(
                fontSize: 18,
                fontWeight: FontWeight.bold,
                fontFamily: 'JetBrains Mono',
                color: theme.colorScheme.onSurface,
              ),
            ),
          ),
          if (published != null) ...[
            const SizedBox(height: 4),
            Text(
              'PUBLISHED: $published',
              style: TextStyle(
                fontSize: 9.5,
                color: colors.cyberCyan,
                fontFamily: 'JetBrains Mono',
              ),
            ),
          ],
        ],
      ),
    );
  }

  Widget _buildSpecificationSheet(
    BuildContext context,
    MotorcycleSpecification? spec,
    MotorSignalThemeColors colors,
    ThemeData theme,
  ) {
    if (spec == null) {
      return Card(
        color: colors.surfaceContainer,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(12),
          side: BorderSide(color: colors.outlineVariant),
        ),
        child: const Padding(
          padding: EdgeInsets.all(16.0),
          child: Text(
            'Detailed specifications unavailable for this motorcycle.',
            style: TextStyle(color: Colors.white54),
          ),
        ),
      );
    }

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(
          'SPECIFICATIONS',
          style: TextStyle(
            fontFamily: 'Sora',
            fontSize: 16,
            fontWeight: FontWeight.bold,
            color: colors.cyberCyan,
            letterSpacing: 0.8,
          ),
        ),
        const SizedBox(height: 12),
        _buildSpecGroup('ENGINE', [
          _SpecRow('Displacement', spec.displacementCc != null ? '${spec.displacementCc!.toStringAsFixed(0)} cc' : null),
          _SpecRow('Configuration', spec.engineConfiguration),
          _SpecRow('Cylinders', spec.cylinderCount?.toString()),
          _SpecRow('Horsepower', spec.horsepower != null ? '${spec.horsepower!.toStringAsFixed(0)} HP @ ${spec.horsepowerRpm ?? "—"} RPM' : null),
          _SpecRow('Torque', spec.torqueLbFt != null ? '${spec.torqueLbFt!.toStringAsFixed(1)} lb-ft @ ${spec.torqueRpm ?? "—"} RPM' : null),
          _SpecRow('Redline', spec.redlineRpm != null ? '${spec.redlineRpm} RPM' : null),
          _SpecRow('Compression Ratio', spec.compressionRatio),
          _SpecRow('Cooling System', spec.coolingSystem),
          _SpecRow('Fuel System', spec.fuelSystem),
        ], colors, theme),
        _buildSpecGroup('PERFORMANCE (PUBLISHED)', [
          _SpecRow('Claimed Top Speed', spec.claimedTopSpeedMph != null ? '~${spec.claimedTopSpeedMph!.toStringAsFixed(0)} MPH' : null),
          _SpecRow('Claimed 0–60 MPH', spec.claimedZeroToSixtySec != null ? '~${spec.claimedZeroToSixtySec!.toStringAsFixed(1)} sec' : null),
          _SpecRow('Claimed 1/4 Mile', spec.claimedQuarterMileSec != null ? '~${spec.claimedQuarterMileSec!.toStringAsFixed(1)} sec' : null),
        ], colors, theme),
        _buildSpecGroup('WEIGHT & DIMENSIONS', [
          _SpecRow('Wet Weight', spec.wetWeightLbs != null ? '${spec.wetWeightLbs!.toStringAsFixed(0)} lbs' : null),
          _SpecRow('Dry Weight', spec.dryWeightLbs != null ? '${spec.dryWeightLbs!.toStringAsFixed(0)} lbs' : null),
          _SpecRow('Seat Height', spec.seatHeightInches != null ? '${spec.seatHeightInches!.toStringAsFixed(1)} in' : null),
          _SpecRow('Wheelbase', spec.wheelbaseInches != null ? '${spec.wheelbaseInches!.toStringAsFixed(1)} in' : null),
        ], colors, theme),
        _buildSpecGroup('FUEL', [
          _SpecRow('Tank Capacity', spec.fuelCapacityGallons != null ? '${spec.fuelCapacityGallons!.toStringAsFixed(1)} gal' : null),
          _SpecRow('Fuel Economy', spec.fuelEconomyMpg != null ? '${spec.fuelEconomyMpg!.toStringAsFixed(0)} MPG' : null),
          _SpecRow('Estimated Range', spec.estimatedRangeMiles != null ? '~${spec.estimatedRangeMiles!.toStringAsFixed(0)} miles' : null),
        ], colors, theme),
        _buildSpecGroup('CHASSIS & BRAKES', [
          _SpecRow('Frame Type', spec.frameType),
          _SpecRow('Front Suspension', spec.frontSuspension),
          _SpecRow('Rear Suspension', spec.rearSuspension),
          _SpecRow('Front Brake', spec.frontBrake),
          _SpecRow('Rear Brake', spec.rearBrake),
          _SpecRow('ABS System', spec.absType),
          _SpecRow('Front Tire', spec.frontTireSize),
          _SpecRow('Rear Tire', spec.rearTireSize),
        ], colors, theme),
        _buildSpecGroup('TRANSMISSION', [
          _SpecRow('Transmission Type', spec.transmissionType),
          _SpecRow('Gears', spec.gearCount?.toString()),
          _SpecRow('Final Drive', spec.finalDrive),
        ], colors, theme),
        if (spec.source != null) ...[
          const SizedBox(height: 12),
          Text(
            'Specifications Source: ${spec.source}',
            style: TextStyle(
              fontSize: 11,
              color: theme.colorScheme.onSurface.withValues(alpha: 0.4),
              fontFamily: 'Inter',
            ),
          ),
        ],
      ],
    );
  }

  Widget _buildSpecGroup(
    String title,
    List<_SpecRow> rows,
    MotorSignalThemeColors colors,
    ThemeData theme,
  ) {
    final validRows = rows.where((r) => r.value != null && r.value!.isNotEmpty).toList();
    if (validRows.isEmpty) return const SizedBox.shrink();

    return Card(
      elevation: 1,
      color: colors.surfaceContainer,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(12),
        side: BorderSide(color: colors.outlineVariant),
      ),
      margin: const EdgeInsets.only(bottom: 12),
      child: Padding(
        padding: const EdgeInsets.all(14.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(
              title,
              style: TextStyle(
                fontFamily: 'Sora',
                fontWeight: FontWeight.bold,
                color: colors.cyberCyan,
                fontSize: 12,
                letterSpacing: 0.8,
              ),
            ),
            const SizedBox(height: 8),
            ...validRows.map(
              (r) => Padding(
                padding: const EdgeInsets.symmetric(vertical: 4.0),
                child: Row(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      r.label,
                      style: TextStyle(
                        fontSize: 12,
                        color: theme.colorScheme.onSurface.withValues(alpha: 0.6),
                      ),
                    ),
                    const SizedBox(width: 8),
                    Expanded(
                      child: Text(
                        r.value!,
                        textAlign: TextAlign.right,
                        style: TextStyle(
                          fontWeight: FontWeight.bold,
                          fontFamily: 'JetBrains Mono',
                          fontSize: 12,
                          color: theme.colorScheme.onSurface,
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }

  void _showEditNicknameDialog(BuildContext context, WidgetRef ref, GarageMotorcycle bike) {
    final controller = TextEditingController(text: bike.nickname ?? '');
    showDialog(
      context: context,
      builder: (context) {
        return AlertDialog(
          title: const Text('Edit Nickname'),
          content: TextField(
            controller: controller,
            decoration: const InputDecoration(hintText: 'Enter nickname'),
          ),
          actions: [
            TextButton(onPressed: () => Navigator.pop(context), child: const Text('Cancel')),
            ElevatedButton(
              onPressed: () {
                ref.read(garageControllerProvider).updateNickname(
                      bike.id,
                      controller.text.trim().isNotEmpty ? controller.text.trim() : null,
                    );
                Navigator.pop(context);
              },
              child: const Text('Save'),
            ),
          ],
        );
      },
    );
  }

  void _confirmDelete(
    BuildContext context,
    WidgetRef ref,
    GarageMotorcycle bike,
    MotorSignalThemeColors colors,
  ) {
    showDialog(
      context: context,
      builder: (context) {
        return AlertDialog(
          title: const Text('Delete Motorcycle?'),
          content: Text(
            'Are you sure you want to remove ${bike.makeName} ${bike.modelName} from your Garage? Historical rides associated with this motorcycle will be preserved.',
          ),
          actions: [
            TextButton(onPressed: () => Navigator.pop(context), child: const Text('Cancel')),
            ElevatedButton(
              style: ElevatedButton.styleFrom(backgroundColor: colors.raceRed),
              onPressed: () {
                ref.read(garageControllerProvider).deleteMotorcycle(bike.id);
                Navigator.pop(context);
                context.pop();
              },
              child: const Text('Delete', style: TextStyle(color: Colors.white)),
            ),
          ],
        );
      },
    );
  }
}

class _SpecRow {
  final String label;
  final String? value;
  _SpecRow(this.label, this.value);
}