import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../providers/providers.dart';
import 'color_picker.dart';

/// Карточка одной группы ламп с управлением:
/// вкл/выкл, яркость, температура, цвет, сцена.
class GroupCard extends ConsumerStatefulWidget {
  final Map<String, dynamic> group;

  const GroupCard({super.key, required this.group});

  @override
  ConsumerState<GroupCard> createState() => _GroupCardState();
}

class _GroupCardState extends ConsumerState<GroupCard> {
  /// Текущий режим управления: temp (температура) или color (RGB)
  String _mode = 'temp';
  bool _showColorPicker = false;

  @override
  Widget build(BuildContext context) {
    final g = widget.group;
    final id = g['id'].toString();
    final name = g['name'] ?? 'Без имени';
    final bool isOn = g['last_state']?['state'] ?? false;
    final int bri = g['last_state']?['brightness'] ?? 100;
    final int temp = g['last_state']?['temp'] ?? 4000;
    final int r = g['last_state']?['r'] ?? 255;
    final int gVal = g['last_state']?['g'] ?? 200;
    final int b = g['last_state']?['b'] ?? 100;

    // Цвет подсветки карточки зависит от режима и состояния
    final cardAccent = isOn
        ? (_mode == 'temp'
            ? Color.lerp(Colors.orange, Colors.blueAccent, (temp - 2700) / 3800)!
            : Color.fromARGB(255, r, gVal, b))
        : Colors.white12;

    return Card(
      margin: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
      child: AnimatedContainer(
        duration: const Duration(milliseconds: 300),
        decoration: BoxDecoration(
          borderRadius: BorderRadius.circular(16),
          border: isOn
              ? Border.all(color: cardAccent.withOpacity(0.3), width: 1)
              : null,
        ),
        child: Padding(
          padding: const EdgeInsets.all(16),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              // ─── Заголовок + переключатель ───
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Expanded(
                    child: Text(
                      name,
                      style: TextStyle(
                        fontSize: 18,
                        fontWeight: FontWeight.bold,
                        color: isOn ? Colors.white : Colors.white54,
                      ),
                    ),
                  ),
                  // Кнопка "таймер на 4 часа"
                  if (isOn)
                    IconButton(
                      icon: const Icon(Icons.timer, size: 20, color: Colors.white38),
                      tooltip: 'Включить на 4 часа',
                      onPressed: () => ref.read(groupsProvider.notifier).setTimer4h(id),
                    ),
                  Switch(
                    value: isOn,
                    activeColor: Colors.deepOrange,
                    onChanged: (v) =>
                        ref.read(groupsProvider.notifier).toggleGroup(id, v),
                  ),
                ],
              ),

              // ─── Управление (когда включено) ───
              if (isOn) ...[
                const SizedBox(height: 8),

                // Яркость
                _SliderRow(
                  icon: Icons.sunny,
                  value: bri.toDouble().clamp(10, 100),
                  min: 10,
                  max: 100,
                  divisions: 9,
                  label: "$bri%",
                  activeColor: Colors.amber,
                  onChanged: (v) => ref
                      .read(groupsProvider.notifier)
                      .setBrightness(id, v.toInt()),
                ),

                // Переключатель режима: температура / цвет / сцена
                Row(
                  children: [
                    _ModeChip(
                      label: 'Темп.',
                      icon: Icons.wb_twilight,
                      selected: _mode == 'temp',
                      onTap: () => setState(() {
                        _mode = 'temp';
                        _showColorPicker = false;
                      }),
                    ),
                    const SizedBox(width: 8),
                    _ModeChip(
                      label: 'Цвет',
                      icon: Icons.palette,
                      selected: _mode == 'color',
                      onTap: () => setState(() {
                        _mode = 'color';
                        _showColorPicker = true;
                      }),
                    ),
                    const SizedBox(width: 8),
                    _ModeChip(
                      label: 'Сцена',
                      icon: Icons.auto_awesome,
                      selected: _mode == 'scene',
                      onTap: () => setState(() {
                        _mode = 'scene';
                        _showColorPicker = false;
                      }),
                    ),
                  ],
                ),
                const SizedBox(height: 8),

                // ─── Режим: температура ───
                if (_mode == 'temp')
                  _SliderRow(
                    icon: Icons.wb_twilight,
                    value: temp.toDouble().clamp(2700, 6500),
                    min: 2700,
                    max: 6500,
                    divisions: 38, // шаг 100K
                    label: "${temp}K",
                    activeColor: Color.lerp(
                        Colors.orange, Colors.blueAccent, (temp - 2700) / 3800),
                    onChanged: (v) => ref
                        .read(groupsProvider.notifier)
                        .setTemperature(id, v.toInt()),
                  ),

                // ─── Режим: цвет ───
                if (_mode == 'color')
                  SimpleColorPicker(
                    initialColor: Color.fromARGB(255, r, gVal, b),
                    onColorChanged: (c) => ref
                        .read(groupsProvider.notifier)
                        .setColor(id, c.red, c.green, c.blue),
                  ),

                // ─── Режим: сцена ───
                if (_mode == 'scene') _SceneSelector(groupId: id),
              ],
            ],
          ),
        ),
      ),
    );
  }
}

/// Слайдер с иконкой и подписью
class _SliderRow extends StatelessWidget {
  final IconData icon;
  final double value;
  final double min;
  final double max;
  final int divisions;
  final String label;
  final Color? activeColor;
  final ValueChanged<double> onChanged;

  const _SliderRow({
    required this.icon,
    required this.value,
    required this.min,
    required this.max,
    required this.divisions,
    required this.label,
    this.activeColor,
    required this.onChanged,
  });

  @override
  Widget build(BuildContext context) {
    return Row(
      children: [
        Icon(icon, size: 18, color: Colors.white54),
        Expanded(
          child: Slider(
            value: value,
            min: min,
            max: max,
            divisions: divisions,
            label: label,
            activeColor: activeColor,
            onChanged: onChanged,
          ),
        ),
        SizedBox(
          width: 50,
          child: Text(
            label,
            style: const TextStyle(fontSize: 12, color: Colors.white54),
            textAlign: TextAlign.right,
          ),
        ),
      ],
    );
  }
}

/// Чип переключения режима
class _ModeChip extends StatelessWidget {
  final String label;
  final IconData icon;
  final bool selected;
  final VoidCallback onTap;

  const _ModeChip({
    required this.label,
    required this.icon,
    required this.selected,
    required this.onTap,
  });

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: onTap,
      child: AnimatedContainer(
        duration: const Duration(milliseconds: 200),
        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
        decoration: BoxDecoration(
          color: selected ? Colors.deepOrange.withOpacity(0.2) : Colors.white10,
          borderRadius: BorderRadius.circular(20),
          border: selected
              ? Border.all(color: Colors.deepOrange, width: 1)
              : Border.all(color: Colors.transparent),
        ),
        child: Row(
          mainAxisSize: MainAxisSize.min,
          children: [
            Icon(icon, size: 14, color: selected ? Colors.deepOrange : Colors.white54),
            const SizedBox(width: 4),
            Text(
              label,
              style: TextStyle(
                fontSize: 12,
                color: selected ? Colors.deepOrange : Colors.white54,
              ),
            ),
          ],
        ),
      ),
    );
  }
}

/// Выбор сцены из списка, загруженного с сервера
class _SceneSelector extends ConsumerWidget {
  final String groupId;

  const _SceneSelector({required this.groupId});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final scenes = ref.watch(scenesProvider);

    if (scenes.isEmpty) {
      // Загрузить сцены при первом показе
      Future.microtask(() => ref.read(scenesProvider.notifier).load());
      return const Padding(
        padding: EdgeInsets.all(8.0),
        child: Center(
          child: SizedBox(
            width: 20,
            height: 20,
            child: CircularProgressIndicator(strokeWidth: 2),
          ),
        ),
      );
    }

    return Wrap(
      spacing: 8,
      runSpacing: 4,
      children: scenes.map((scene) {
        // Сцена может быть строкой или Map с полем 'name'/'id'
        final sceneName = scene is String
            ? scene
            : (scene['name'] ?? scene['id'] ?? scene.toString());
        final sceneId = scene is String
            ? scene
            : (scene['id'] ?? scene['name'] ?? scene.toString());

        return ActionChip(
          label: Text(sceneName.toString(), style: const TextStyle(fontSize: 12)),
          backgroundColor: Colors.white10,
          onPressed: () => ref
              .read(groupsProvider.notifier)
              .setScene(groupId, sceneId.toString()),
        );
      }).toList(),
    );
  }
}