import 'package:flutter/material.dart';
import '../core/app_controller.dart';
import '../core/build_info.dart';
import '../l10n/strings.dart';
import 'adaptive.dart';
import 'change_password.dart';
import 'common.dart';
import 'gates.dart';
import 'profile_io.dart';

class SettingsPage extends StatefulWidget {
  final AppController controller;
  const SettingsPage(this.controller, {super.key});
  @override
  State<SettingsPage> createState() => _SettingsPageState();
}

class _SettingsPageState extends State<SettingsPage> {
  bool busy = false;
  Future<void> action(Future<void> Function() task) async {
    setState(() => busy = true);
    try {
      await task();
    } catch (e) {
      if (mounted) showFailure(context, e);
    } finally {
      if (mounted) setState(() => busy = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    final c = widget.controller;
    return LayoutBuilder(
      builder: (context, constraints) => ListView(
        padding: readablePadding(constraints),
        children: [
          Text(
            'CH-J · SM Mobile $appVersion',
            style: Theme.of(context).textTheme.titleLarge,
          ),
          Text(buildId),
          const SizedBox(height: 12),
          Text(context.tr('localOnly')),
          const SizedBox(height: 24),
          languagePicker(context, c),
          const SizedBox(height: 16),
          DropdownButtonFormField<ThemeMode>(
            initialValue: c.theme,
            isExpanded: true,
            decoration: InputDecoration(labelText: context.tr('theme')),
            items: ThemeMode.values
                .map(
                  (t) => DropdownMenuItem(
                    value: t,
                    child: Text(context.tr(t.name)),
                  ),
                )
                .toList(),
            onChanged: (t) => action(() async {
              c.theme = t!;
              await c.saveSettings();
            }),
          ),
          const SizedBox(height: 24),
          Text(
            context.tr('securitySection'),
            style: Theme.of(context).textTheme.titleMedium,
          ),
          ListTile(
            contentPadding: EdgeInsets.zero,
            leading: const Icon(Icons.password),
            title: Text(context.tr('changePassword')),
            subtitle: Text(
              '${context.tr('kdfInfo')}: '
              '${c.vault.kdfName == 'argon2id' ? 'Argon2id' : 'PBKDF2-SHA256'}'
              ' · AES-256-GCM',
            ),
            trailing: const Icon(Icons.chevron_right),
            onTap: busy
                ? null
                : () async {
                    await Navigator.push(
                      context,
                      MaterialPageRoute(builder: (_) => ChangePasswordPage(c)),
                    );
                    if (mounted) setState(() {});
                  },
          ),
          SwitchListTile.adaptive(
            contentPadding: EdgeInsets.zero,
            title: Text(context.tr('biometric')),
            subtitle: Text(context.tr('biometricNote')),
            value: c.biometric,
            onChanged: busy
                ? null
                : (v) => action(
                    () => c.setBiometric(v, context.tr('biometricReason')),
                  ),
          ),
          SwitchListTile.adaptive(
            contentPadding: EdgeInsets.zero,
            title: Text(context.tr('lockBackground')),
            value: c.lockBackground,
            onChanged: (v) => action(() async {
              c.lockBackground = v;
              await c.saveSettings();
            }),
          ),
          const SizedBox(height: 16),
          DropdownButtonFormField<int>(
            isExpanded: true,
            initialValue: c.idleMinutes,
            decoration: InputDecoration(labelText: context.tr('idleTimeout')),
            items: idleChoices
                .map((i) => DropdownMenuItem(value: i, child: Text('$i')))
                .toList(),
            onChanged: (i) => action(() async {
              c.idleMinutes = i!;
              await c.saveSettings();
            }),
          ),
          const SizedBox(height: 16),
          DropdownButtonFormField<int>(
            isExpanded: true,
            initialValue: c.monitorSeconds,
            decoration: InputDecoration(
              labelText: context.tr('monitorInterval'),
            ),
            items: [5, 10, 30, 60]
                .map((i) => DropdownMenuItem(value: i, child: Text('$i')))
                .toList(),
            onChanged: (i) => action(() async {
              c.monitorSeconds = i!;
              await c.saveSettings();
            }),
          ),
          const SizedBox(height: 24),
          OutlinedButton.icon(
            onPressed: busy
                ? null
                : () => action(() => importProfiles(context, c)),
            icon: const Icon(Icons.file_open),
            label: Text(context.tr('importProfiles')),
          ),
          OutlinedButton.icon(
            onPressed: busy ? null : () => action(() => exportProfiles(c)),
            icon: const Icon(Icons.ios_share),
            label: Text(context.tr('exportProfiles')),
          ),
          const SizedBox(height: 16),
          ListTile(
            title: Text(context.tr('license')),
            leading: const Icon(Icons.description_outlined),
            onTap: () => Navigator.push(
              context,
              MaterialPageRoute(
                builder: (ctx) => Scaffold(
                  appBar: AppBar(title: Text(ctx.tr('license'))),
                  body: SingleChildScrollView(
                    padding: const EdgeInsets.all(20),
                    child: SelectableText(c.legal.license),
                  ),
                ),
              ),
            ),
          ),
          ListTile(
            title: Text(context.tr('guidance')),
            leading: const Icon(Icons.shield_outlined),
            onTap: () => Navigator.push(
              context,
              MaterialPageRoute(
                builder: (ctx) => Scaffold(
                  appBar: AppBar(title: Text(ctx.tr('guidance'))),
                  body: SingleChildScrollView(
                    padding: const EdgeInsets.all(20),
                    child: SelectableText(
                      c.legal.guidance[Localizations.localeOf(
                            ctx,
                          ).languageCode] ??
                          c.legal.guidance['en']!,
                    ),
                  ),
                ),
              ),
            ),
          ),
          ListTile(
            title: Text(context.tr('componentLicenses')),
            leading: const Icon(Icons.inventory_2_outlined),
            onTap: () => showLicensePage(
              context: context,
              applicationName: 'SM Mobile',
              applicationVersion: appVersion,
            ),
          ),
          const SizedBox(height: 16),
          FilledButton.icon(
            onPressed: c.lock,
            icon: const Icon(Icons.lock),
            label: Text(context.tr('lock')),
          ),
          if (busy) const LinearProgressIndicator(),
        ],
      ),
    );
  }
}