import 'package:flutter/material.dart';

import 'package:go_router/go_router.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:fluffychat/config/setting_keys.dart';
import 'package:fluffychat/l10n/l10n.dart';
import 'package:fluffychat/widgets/adaptive_dialogs/show_text_input_dialog.dart';
import 'package:fluffychat/widgets/matrix.dart';

class ConfigViewer extends StatefulWidget {
  const ConfigViewer({super.key});

  @override
  State<ConfigViewer> createState() => _ConfigViewerState();
}

class _ConfigViewerState extends State<ConfigViewer> {
  String _searchQuery = '';

  Future<void> _changeSetting(
    AppSettings appSetting,
    SharedPreferences store,
    String initialValue,
  ) async {
    if (appSetting is AppSettings<bool>) {
      await appSetting.setItem(!(initialValue == 'true'));
      setState(() {});
      return;
    }

    final value = await showTextInputDialog(
      context: context,
      title: appSetting.name,
      hintText: appSetting.defaultValue.toString(),
      initialText: initialValue,
    );
    if (value == null) return;

    if (appSetting is AppSettings<String>) {
      await appSetting.setItem(value);
    }
    if (appSetting is AppSettings<int>) {
      await appSetting.setItem(int.parse(value));
    }
    if (appSetting is AppSettings<double>) {
      await appSetting.setItem(double.parse(value));
    }

    setState(() {});
  }

  Future<void> _reset() async {
    await AppSettings.reset();
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final normalizedQuery = _searchQuery.trim().toLowerCase();
    final filteredSettings = AppSettings.values
        .where((setting) {
          if (normalizedQuery.isEmpty) return true;
          return setting.name.toLowerCase().contains(normalizedQuery);
        })
        .toList(growable: false);

    return Scaffold(
      appBar: AppBar(
        title: Text(L10n.of(context).advancedConfigurations),
        leading: BackButton(onPressed: () => context.go('/')),
        actions: [
          TextButton(onPressed: _reset, child: Text(L10n.of(context).reset)),
        ],
      ),
      body: Column(
        crossAxisAlignment: .stretch,
        children: [
          Container(
            margin: const EdgeInsets.all(16),
            padding: const EdgeInsets.all(16),
            color: theme.colorScheme.errorContainer,
            child: Text(
              'Changing configs by hand is untested! Use without any warranty!',
              style: TextStyle(color: theme.colorScheme.onErrorContainer),
            ),
          ),
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16),
            child: TextField(
              onChanged: (value) => setState(() => _searchQuery = value),
              decoration: InputDecoration(
                hintText: 'Search config key',
                prefixIcon: const Icon(Icons.search),
                border: const OutlineInputBorder(),
                isDense: true,
                filled: true,
                fillColor: theme.colorScheme.surfaceContainerHighest.withAlpha(
                  128,
                ),
              ),
            ),
          ),
          const SizedBox(height: 8),
          Expanded(
            child: ListView.builder(
              itemCount: filteredSettings.length,
              itemBuilder: (context, i) {
                final store = Matrix.of(context).store;
                final appSetting = filteredSettings[i];
                var value = '';
                if (appSetting is AppSettings<String>) {
                  value = appSetting.value;
                }
                if (appSetting is AppSettings<int>) {
                  value = appSetting.value.toString();
                }
                if (appSetting is AppSettings<bool>) {
                  return SwitchListTile.adaptive(
                    title: Text(appSetting.name),
                    subtitle: Text(value),
                    value: appSetting.value,
                    onChanged: (value) =>
                        _changeSetting(appSetting, store, (!value).toString()),
                  );
                }
                if (appSetting is AppSettings<double>) {
                  value = appSetting.value.toString();
                }
                return ListTile(
                  title: Text(appSetting.name),
                  subtitle: Text(value),
                  onTap: () => _changeSetting(appSetting, store, value),
                );
              },
            ),
          ),
        ],
      ),
    );
  }
}