/*
 * Copyright (c) 2024-2026 Fabian Freund.
 *
 * This file is part of WebLibre
 * (see https://weblibre.eu).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
import 'dart:developer';

import 'package:fading_scroll/fading_scroll.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:flutter_material_design_icons/flutter_material_design_icons.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:weblibre/core/providers/app_state.dart';
import 'package:weblibre/core/routing/routes.dart';
import 'package:weblibre/features/geckoview/features/browser/presentation/dialogs/install_local_addon_dialog.dart';
import 'package:weblibre/features/settings/presentation/controllers/save_settings.dart';
import 'package:weblibre/features/settings/presentation/dialogs/user_agent_restart_dialog.dart';
import 'package:weblibre/features/settings/presentation/widgets/custom_list_tile.dart';
import 'package:weblibre/features/settings/presentation/widgets/sections.dart';
import 'package:weblibre/features/user/data/models/engine_settings.dart';
import 'package:weblibre/features/user/domain/presentation/dialogs/quit_browser_dialog.dart';
import 'package:weblibre/features/user/domain/providers.dart';
import 'package:weblibre/features/user/domain/repositories/cache.dart';
import 'package:weblibre/features/user/domain/repositories/engine_settings.dart';
import 'package:weblibre/utils/exit_app.dart';
import 'package:weblibre/utils/ui_helper.dart';

class AdvancedSettingsScreen extends StatelessWidget {
  const AdvancedSettingsScreen({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Advanced')),
      body: SafeArea(
        child: FadingScroll(
          fadingSize: 25,
          builder: (context, controller) {
            return ListView(
              controller: controller,
              padding: const EdgeInsets.symmetric(horizontal: 12.0),
              children: const [
                _ContentBehaviorSection(),
                _ExperimentalSection(),
                _ExtensionsSection(),
                _StorageDebuggingSection(),
                _ResetSection(),
              ],
            );
          },
        ),
      ),
    );
  }
}

class _ContentBehaviorSection extends StatelessWidget {
  const _ContentBehaviorSection();

  @override
  Widget build(BuildContext context) {
    return const Column(
      children: [
        SettingSection(name: 'Content Behavior'),
        _JavaScriptTile(),
        _UserAgentTile(),
        _EnterpriseRootsTile(),
      ],
    );
  }
}

class _ExtensionsSection extends StatelessWidget {
  const _ExtensionsSection();

  @override
  Widget build(BuildContext context) {
    return const Column(
      children: [
        SettingSection(name: 'Extensions'),
        _InstallLocalAddonTile(),
        _AddonCollectionTile(),
      ],
    );
  }
}

class _ExperimentalSection extends StatelessWidget {
  const _ExperimentalSection();

  @override
  Widget build(BuildContext context) {
    return const Column(
      children: [
        SettingSection(name: 'Experimental'),
        _IsolatedProcessEnabledTile(),
        _AppZygoteProcessEnabledTile(),
      ],
    );
  }
}

class _InstallLocalAddonTile extends StatelessWidget {
  const _InstallLocalAddonTile();

  @override
  Widget build(BuildContext context) {
    return CustomListTile(
      title: 'Install from File',
      subtitle: 'Install an extension from a local .xpi file',
      prefix: Padding(
        padding: const EdgeInsets.only(right: 16.0),
        child: Icon(
          MdiIcons.puzzle,
          size: 24,
          color: Theme.of(context).colorScheme.onSurfaceVariant,
        ),
      ),
      suffix: FilledButton.icon(
        onPressed: () async {
          await showInstallLocalAddonDialog(context);
        },
        icon: const Icon(Icons.file_open),
        label: const Text('Install'),
      ),
    );
  }
}

class _AddonCollectionTile extends StatelessWidget {
  const _AddonCollectionTile();

  @override
  Widget build(BuildContext context) {
    return CustomListTile(
      title: 'Custom Collection',
      subtitle: 'Use a custom Mozilla addon collection',
      prefix: Padding(
        padding: const EdgeInsets.only(right: 16.0),
        child: Icon(
          MdiIcons.folderMultiple,
          size: 24,
          color: Theme.of(context).colorScheme.onSurfaceVariant,
        ),
      ),
      suffix: FilledButton.icon(
        onPressed: () async {
          await AddonCollectionRoute().push(context);
        },
        icon: const Icon(Icons.settings),
        label: const Text('Configure'),
      ),
    );
  }
}

class _StorageDebuggingSection extends StatelessWidget {
  const _StorageDebuggingSection();

  @override
  Widget build(BuildContext context) {
    return const Column(
      children: [
        SettingSection(name: 'Storage & Debugging'),
        _IconCacheTile(),
        _ErrorLogsTile(),
        _DartVmTile(),
      ],
    );
  }
}

class _ResetSection extends StatelessWidget {
  const _ResetSection();

  @override
  Widget build(BuildContext context) {
    return const Column(
      children: [
        SettingSection(name: 'Reset'),
        _ResetUITile(),
      ],
    );
  }
}

class _JavaScriptTile extends HookConsumerWidget {
  const _JavaScriptTile();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final javascriptEnabled = ref.watch(
      engineSettingsWithDefaultsProvider.select((s) => s.javascriptEnabled),
    );

    return SwitchListTile.adaptive(
      title: const Text('Enable JavaScript'),
      subtitle: const Text(
        'While turning off JavaScript can boost security, privacy, and speed, it may cause some sites to not work as intended.',
      ),
      // ignore: deprecated_member_use use this icon for now
      secondary: const Icon(MdiIcons.languageJavascript),
      value: javascriptEnabled,
      onChanged: (value) async {
        await ref
            .read(saveEngineSettingsControllerProvider.notifier)
            .save(
              (currentSettings) =>
                  currentSettings.copyWith.javascriptEnabled(value),
            );
      },
    );
  }
}

class _UserAgentTile extends HookConsumerWidget {
  const _UserAgentTile();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final userAgent = ref.watch(
      engineSettingsWithDefaultsProvider.select((s) => s.userAgent),
    );

    final userAgentTextController = useTextEditingController(
      text: userAgent,
      keys: [userAgent],
    );

    return ListTile(
      leading: const Icon(MdiIcons.cardAccountDetails),
      title: TextField(
        controller: userAgentTextController,
        decoration: const InputDecoration(
          labelText: 'Custom User Agent',
          floatingLabelBehavior: FloatingLabelBehavior.always,
          hintText: 'Mozilla/5.0 …',
        ),
        onSubmitted: (value) async {
          await ref
              .read(saveEngineSettingsControllerProvider.notifier)
              .save(
                (currentSettings) => currentSettings.copyWith.userAgent(value),
              );

          if (context.mounted) {
            final restart = await showUserAgentRestartDialog(context);

            if (restart == true) {
              await exitApp(ref.container);
            }
          }
        },
      ),
    );
  }
}

class _EnterpriseRootsTile extends HookConsumerWidget {
  const _EnterpriseRootsTile();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final enterpriseRootsEnabled = ref.watch(
      engineSettingsWithDefaultsProvider.select(
        (s) => s.enterpriseRootsEnabled,
      ),
    );

    return SwitchListTile.adaptive(
      title: const Text('Use third party CA certificates'),
      subtitle: const Text(
        'Allows the use of third party certificates from the Android CA store',
      ),
      secondary: const Icon(MdiIcons.certificate),
      value: enterpriseRootsEnabled,
      onChanged: (value) async {
        await ref
            .read(saveEngineSettingsControllerProvider.notifier)
            .save(
              (currentSettings) =>
                  currentSettings.copyWith.enterpriseRootsEnabled(value),
            );
      },
    );
  }
}

class _IsolatedProcessEnabledTile extends HookConsumerWidget {
  const _IsolatedProcessEnabledTile();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final isolatedProcessEnabled = ref.watch(
      engineSettingsWithDefaultsProvider.select(
        (s) => s.isolatedProcessEnabled,
      ),
    );

    return SwitchListTile.adaptive(
      title: const Text('Isolated Content Process'),
      subtitle: const Text(
        'Run web content in an isolated process. Requires app restart.',
      ),
      secondary: const Icon(MdiIcons.shieldCheck),
      value: isolatedProcessEnabled,
      onChanged: (value) async {
        await ref
            .read(saveEngineSettingsControllerProvider.notifier)
            .save(
              (currentSettings) =>
                  currentSettings.copyWith.isolatedProcessEnabled(value),
            );
        if (context.mounted) {
          await _showRestartDialog(context, ref);
        }
      },
    );
  }
}

class _AppZygoteProcessEnabledTile extends HookConsumerWidget {
  const _AppZygoteProcessEnabledTile();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final appZygoteProcessEnabled = ref.watch(
      engineSettingsWithDefaultsProvider.select(
        (s) => s.appZygoteProcessEnabled,
      ),
    );

    return SwitchListTile.adaptive(
      title: const Text('App Zygote Process'),
      subtitle: const Text(
        'Preload content service via App Zygote for faster isolated process startup. Requires Android 10+ and app restart.',
      ),
      secondary: const Icon(MdiIcons.rocketLaunch),
      value: appZygoteProcessEnabled,
      onChanged: (value) async {
        await ref
            .read(saveEngineSettingsControllerProvider.notifier)
            .save(
              (currentSettings) =>
                  currentSettings.copyWith.appZygoteProcessEnabled(value),
            );
        if (context.mounted) {
          await _showRestartDialog(context, ref);
        }
      },
    );
  }
}

class _IconCacheTile extends HookConsumerWidget {
  const _IconCacheTile();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final size = ref.watch(
      iconCacheSizeMegabytesProvider.select((value) => value.value),
    );

    return CustomListTile(
      title: 'Icon Cache',
      subtitle: 'Stored favicons',
      prefix: Padding(
        padding: const EdgeInsets.only(right: 16.0),
        child: Icon(
          Icons.image,
          size: 24,
          color: Theme.of(context).colorScheme.onSurfaceVariant,
        ),
      ),
      content: Padding(
        padding: const EdgeInsets.only(top: 8.0),
        child: DefaultTextStyle(
          style: GoogleFonts.robotoMono(
            textStyle: DefaultTextStyle.of(context).style,
          ),
          child: Table(
            columnWidths: const {0: FixedColumnWidth(100)},
            children: [
              TableRow(
                children: [
                  const Text('Size'),
                  Text('${size?.toStringAsFixed(2) ?? 0} MB'),
                ],
              ),
            ],
          ),
        ),
      ),
      suffix: FilledButton.icon(
        onPressed: () async {
          await ref.read(cacheRepositoryProvider.notifier).clearCache();
        },
        icon: const Icon(Icons.delete),
        label: const Text('Clear'),
      ),
    );
  }
}

class _ErrorLogsTile extends StatelessWidget {
  const _ErrorLogsTile();

  @override
  Widget build(BuildContext context) {
    return CustomListTile(
      title: 'Error Logs',
      subtitle: 'View and copy logs for issue reporting',
      prefix: Padding(
        padding: const EdgeInsets.only(right: 16.0),
        child: Icon(
          Icons.bug_report,
          size: 24,
          color: Theme.of(context).colorScheme.onSurfaceVariant,
        ),
      ),
      suffix: FilledButton.icon(
        onPressed: () async {
          await ErrorLogsRoute().push(context);
        },
        icon: const Icon(Icons.open_in_new),
        label: const Text('View'),
      ),
    );
  }
}

class _DartVmTile extends StatelessWidget {
  const _DartVmTile();

  @override
  Widget build(BuildContext context) {
    if (!kDebugMode) return const SizedBox.shrink();

    return CustomListTile(
      title: 'Dart VM',
      subtitle: 'Copy Dart VM service URL',
      prefix: Padding(
        padding: const EdgeInsets.only(right: 16.0),
        child: Icon(
          Icons.bug_report,
          size: 24,
          color: Theme.of(context).colorScheme.onSurfaceVariant,
        ),
      ),
      suffix: FilledButton.icon(
        onPressed: () async {
          final serviceProtocolInfo = await Service.getInfo();

          await Clipboard.setData(
            ClipboardData(
              text: serviceProtocolInfo.serverUri?.toString() ?? 'Error',
            ),
          );

          if (context.mounted) {
            showInfoMessage(context, 'Service URL copied');
          }
        },
        icon: const Icon(Icons.copy),
        label: const Text('Copy'),
      ),
    );
  }
}

class _ResetUITile extends ConsumerWidget {
  const _ResetUITile();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    return CustomListTile(
      title: 'Reset UI',
      subtitle: 'Rebuild the entire browser UI',
      prefix: Padding(
        padding: const EdgeInsets.only(right: 16.0),
        child: Icon(
          Icons.bug_report,
          size: 24,
          color: Theme.of(context).colorScheme.onSurfaceVariant,
        ),
      ),
      suffix: FilledButton.icon(
        onPressed: () {
          ref.read(appStateKeyProvider.notifier).reset();
        },
        icon: const Icon(Icons.restore),
        label: const Text('Reset'),
      ),
    );
  }
}

Future<void> _showRestartDialog(BuildContext context, WidgetRef ref) async {
  final result = await showQuitBrowserDialog(context);
  if (result == true && context.mounted) {
    await exitApp(ProviderScope.containerOf(context));
  }
}