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

import 'package:timetrack/features/settings/domain/settings_provider.dart';
import 'package:timetrack/features/settings/presentation/widgets/export_sheet.dart';

class SettingsScreen extends ConsumerWidget {
  const SettingsScreen({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final themeMode = ref.watch(themeModeNotifierProvider);
    final locale = ref.watch(localeNotifierProvider);
    final quickAccessCount = ref.watch(quickAccessCountNotifierProvider);

    return Scaffold(
      appBar: AppBar(title: const Text('Settings')),
      body: ListView(
        children: [
          // Appearance
          _SectionHeader(label: 'Appearance'),
          ListTile(
            leading: const Icon(Icons.brightness_6_outlined),
            title: const Text('Theme'),
            trailing: DropdownButton<ThemeMode>(
              value: themeMode,
              underline: const SizedBox.shrink(),
              items: const [
                DropdownMenuItem(value: ThemeMode.system, child: Text('System')),
                DropdownMenuItem(value: ThemeMode.light, child: Text('Light')),
                DropdownMenuItem(value: ThemeMode.dark, child: Text('Dark')),
              ],
              onChanged: (mode) {
                if (mode != null) {
                  ref.read(themeModeNotifierProvider.notifier).setThemeMode(mode);
                }
              },
            ),
          ),
          ListTile(
            leading: const Icon(Icons.language_outlined),
            title: const Text('Language'),
            trailing: DropdownButton<Locale?>(
              value: locale,
              underline: const SizedBox.shrink(),
              items: const [
                DropdownMenuItem(value: null, child: Text('System')),
                DropdownMenuItem(value: Locale('en'), child: Text('English')),
                DropdownMenuItem(value: Locale('de'), child: Text('Deutsch')),
              ],
              onChanged: (l) {
                ref.read(localeNotifierProvider.notifier).setLocale(l);
              },
            ),
          ),

          const Divider(),

          // Timer
          _SectionHeader(label: 'Timer'),
          Padding(
            padding: const EdgeInsets.fromLTRB(16, 8, 16, 0),
            child: Row(
              children: [
                const Icon(Icons.bolt_outlined, size: 20),
                const SizedBox(width: 16),
                Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        'Quick access projects',
                        style: Theme.of(context).textTheme.bodyLarge,
                      ),
                      Text(
                        'Number of frequently used projects shown above the project picker (${QuickAccessCountNotifier.minCount}–${QuickAccessCountNotifier.maxCount})',
                        style: Theme.of(context).textTheme.bodySmall?.copyWith(
                              color: Theme.of(context).colorScheme.onSurfaceVariant,
                            ),
                      ),
                    ],
                  ),
                ),
                Text(
                  '$quickAccessCount',
                  style: Theme.of(context).textTheme.titleMedium?.copyWith(
                        color: Theme.of(context).colorScheme.primary,
                        fontWeight: FontWeight.bold,
                      ),
                ),
              ],
            ),
          ),
          Slider(
            value: quickAccessCount.toDouble(),
            min: QuickAccessCountNotifier.minCount.toDouble(),
            max: QuickAccessCountNotifier.maxCount.toDouble(),
            divisions: QuickAccessCountNotifier.maxCount - QuickAccessCountNotifier.minCount,
            label: '$quickAccessCount',
            onChanged: (value) {
              ref
                  .read(quickAccessCountNotifierProvider.notifier)
                  .setCount(value.round());
            },
          ),

          const Divider(),

          // Data
          _SectionHeader(label: 'Data'),
          ListTile(
            leading: const Icon(Icons.upload_outlined),
            title: const Text('Export data'),
            trailing: const Icon(Icons.arrow_forward_ios, size: 16),
            onTap: () => ExportSheet.show(context),
          ),

          const Divider(),

          // About
          _SectionHeader(label: 'About'),
          const ListTile(
            leading: Icon(Icons.info_outline),
            title: Text('Version'),
            trailing: Text('0.1.0'),
          ),
          ListTile(
            leading: const Icon(Icons.article_outlined),
            title: const Text('Licences'),
            onTap: () => showLicensePage(
              context: context,
              applicationName: 'Timetrack',
              applicationVersion: '0.1.0',
            ),
          ),
        ],
      ),
    );
  }
}

class _SectionHeader extends StatelessWidget {
  const _SectionHeader({required this.label});

  final String label;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(16, 16, 16, 4),
      child: Text(
        label,
        style: Theme.of(context).textTheme.labelLarge?.copyWith(
              color: Theme.of(context).colorScheme.primary,
            ),
      ),
    );
  }
}