import 'dart:async';

import 'package:aves/app_flavor.dart';
import 'package:aves/model/device.dart';
import 'package:aves/model/settings/settings.dart';
import 'package:aves/model/source/collection_source.dart';
import 'package:aves/model/vaults/vaults.dart';
import 'package:aves/services/common/services.dart';
import 'package:aves/theme/colors.dart';
import 'package:aves/theme/icons.dart';
import 'package:aves/widgets/collection/entry_set_action_delegate.dart';
import 'package:aves/widgets/common/extensions/build_context.dart';
import 'package:aves/widgets/dialogs/aves_confirmation_dialog.dart';
import 'package:aves/widgets/dialogs/aves_dialog.dart';
import 'package:aves/widgets/settings/common/tile_leading.dart';
import 'package:aves/widgets/settings/common/tiles.dart';
import 'package:aves/widgets/settings/privacy/access_grants_page.dart';
import 'package:aves/widgets/settings/privacy/hidden_items_page.dart';
import 'package:aves/widgets/settings/settings_definition.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

class PrivacySection extends SettingsSection {
  @override
  String get key => 'privacy';

  @override
  Widget icon(BuildContext context) => SettingsTileLeading(
        icon: AIcons.privacy,
        color: context.select<AvesColorsData, Color>((v) => v.privacy),
      );

  @override
  String title(BuildContext context) => context.l10n.settingsPrivacySectionTitle;

  @override
  FutureOr<List<SettingsTile>> tiles(BuildContext context) async {
    final canEnableErrorReporting = context.select<AppFlavor, bool>((v) => v.canEnableErrorReporting);
    return [
      SettingsTilePrivacyAllowInstalledAppAccess(),
      if (canEnableErrorReporting) SettingsTilePrivacyAllowErrorReporting(),
      if (!settings.useTvLayout && device.canRequestManageMedia) SettingsTilePrivacyManageMedia(),
      SettingsTilePrivacySaveSearchHistory(),
      if (!settings.useTvLayout) SettingsTilePrivacyEnableBin(),
      SettingsTilePrivacyHiddenItems(),
      if (!settings.useTvLayout) SettingsTilePrivacyStorageAccess(),
    ];
  }
}

class SettingsTilePrivacyAllowInstalledAppAccess extends SettingsTile {
  @override
  String title(BuildContext context) => context.l10n.settingsAllowInstalledAppAccess;

  @override
  Widget build(BuildContext context) => SettingsSwitchListTile(
        selector: (context, s) => s.isInstalledAppAccessAllowed,
        onChanged: (v) => settings.isInstalledAppAccessAllowed = v,
        title: title(context),
        subtitle: context.l10n.settingsAllowInstalledAppAccessSubtitle,
      );
}

class SettingsTilePrivacyAllowErrorReporting extends SettingsTile {
  @override
  String title(BuildContext context) => context.l10n.settingsAllowErrorReporting;

  @override
  Widget build(BuildContext context) => SettingsSwitchListTile(
        selector: (context, s) => s.isErrorReportingAllowed,
        onChanged: (v) => settings.isErrorReportingAllowed = v,
        title: title(context),
      );
}

class SettingsTilePrivacySaveSearchHistory extends SettingsTile {
  @override
  String title(BuildContext context) => context.l10n.settingsSaveSearchHistory;

  @override
  Widget build(BuildContext context) => SettingsSwitchListTile(
        selector: (context, s) => s.saveSearchHistory,
        onChanged: (v) {
          settings.saveSearchHistory = v;
          if (!v) {
            settings.searchHistory = [];
          }
        },
        title: title(context),
      );
}

class SettingsTilePrivacyEnableBin extends SettingsTile {
  @override
  String title(BuildContext context) => context.l10n.settingsEnableBin;

  @override
  Widget build(BuildContext context) => SettingsSwitchListTile(
        selector: (context, s) => s.enableBin,
        onChanged: (v) => setBinUsage(context, v),
        title: title(context),
        subtitle: context.l10n.settingsEnableBinSubtitle,
      );

  static Future<bool> setBinUsage(BuildContext context, bool enabled) async {
    final l10n = context.l10n;
    if (!enabled) {
      if (vaults.all.any((v) => v.useBin)) {
        await showDialog<bool>(
          context: context,
          builder: (context) => AvesDialog(
            content: Text(l10n.vaultBinUsageDialogMessage),
            actions: const [OkButton()],
          ),
        );
        return false;
      }

      final source = context.read<CollectionSource>();
      final trashedEntries = source.trashedEntries;
      if (trashedEntries.isNotEmpty) {
        if (!await showConfirmationDialog(
          context: context,
          message: l10n.settingsDisablingBinWarningDialogMessage,
          confirmationButtonLabel: l10n.applyButtonLabel,
        )) {
          return false;
        }

        // delete forever trashed items
        await EntrySetActionDelegate().doDelete(
          context: context,
          entries: trashedEntries,
          enableBin: false,
        );

        // in case of failure or cancellation
        if (source.trashedEntries.isNotEmpty) return false;
      }

      settings.searchHistory = [];
    }

    settings.enableBin = enabled;
    return true;
  }
}

class SettingsTilePrivacyHiddenItems extends SettingsTile {
  @override
  String title(BuildContext context) => context.l10n.settingsHiddenItemsTile;

  @override
  Widget build(BuildContext context) => SettingsSubPageTile(
        title: title(context),
        routeName: HiddenItemsPage.routeName,
        builder: (context) => const HiddenItemsPage(),
      );
}

class SettingsTilePrivacyStorageAccess extends SettingsTile {
  @override
  String title(BuildContext context) => context.l10n.settingsStorageAccessTile;

  @override
  Widget build(BuildContext context) => SettingsSubPageTile(
        title: title(context),
        routeName: StorageAccessPage.routeName,
        builder: (context) => const StorageAccessPage(),
      );
}

class SettingsTilePrivacyManageMedia extends SettingsTile {
  @override
  String title(BuildContext context) => context.l10n.settingsAllowMediaManagement;

  @override
  Widget build(BuildContext context) => _ManageMediaTile(title: title(context));
}

class _ManageMediaTile extends StatefulWidget {
  final String title;

  const _ManageMediaTile({
    required this.title,
  });

  @override
  State<_ManageMediaTile> createState() => _ManageMediaTileState();
}

class _ManageMediaTileState extends State<_ManageMediaTile> with WidgetsBindingObserver {
  late Future<bool> _loader;

  @override
  void initState() {
    super.initState();
    _initLoader();
    WidgetsBinding.instance.addObserver(this);
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }

  void _initLoader() => _loader = deviceService.canManageMedia();

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    if (state == AppLifecycleState.resumed) {
      _initLoader();
      setState(() {});
    }
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<bool>(
      future: _loader,
      builder: (context, snapshot) {
        final loading = snapshot.connectionState != ConnectionState.done;
        final current = snapshot.data ?? false;
        return SwitchListTile(
          value: current,
          onChanged: loading ? null : (v) => deviceService.requestMediaManagePermission(),
          title: Text(widget.title),
        );
      },
    );
  }
}