import 'dart:async';

import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:immich_mobile/domain/models/album/local_album.model.dart';
import 'package:immich_mobile/domain/models/config/app_config.dart';
import 'package:immich_mobile/domain/models/settings_key.dart';
import 'package:immich_mobile/domain/services/sync_linked_album.service.dart';
import 'package:immich_mobile/extensions/build_context_extensions.dart';
import 'package:immich_mobile/extensions/platform_extensions.dart';
import 'package:immich_mobile/generated/translations.g.dart';
import 'package:immich_mobile/providers/background_sync.provider.dart';
import 'package:immich_mobile/providers/backup/backup_album.provider.dart';
import 'package:immich_mobile/providers/infrastructure/platform.provider.dart';
import 'package:immich_mobile/providers/infrastructure/settings.provider.dart';
import 'package:immich_mobile/providers/user.provider.dart';
import 'package:immich_mobile/widgets/settings/setting_group_title.dart';
import 'package:immich_mobile/widgets/settings/setting_list_tile.dart';
import 'package:immich_mobile/widgets/settings/settings_sub_page_scaffold.dart';

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

  @override
  Widget build(BuildContext context) {
    return SettingsSubPageScaffold(
      settings: [
        SettingGroupTitle(title: context.t.network_requirements, icon: Icons.cell_tower),
        const _UseCellularForVideosButton(),
        const _UseCellularForPhotosButton(),
        if (CurrentPlatform.isAndroid) ...[
          const Divider(),
          SettingGroupTitle(title: context.t.background_options, icon: Icons.charging_station_rounded),
          const _BackupOnlyWhenChargingButton(),
          const _BackupDelaySlider(),
        ],
        const Divider(),
        SettingGroupTitle(title: context.t.backup_albums_sync, icon: Icons.sync),
        const _AlbumSyncActionButton(),
      ],
    );
  }
}

class _AlbumSyncActionButton extends ConsumerStatefulWidget {
  const _AlbumSyncActionButton();

  @override
  ConsumerState<_AlbumSyncActionButton> createState() => _AlbumSyncActionButtonState();
}

class _AlbumSyncActionButtonState extends ConsumerState<_AlbumSyncActionButton> {
  bool isAlbumSyncInProgress = false;

  Future<void> _manualSyncAlbums() async {
    setState(() {
      isAlbumSyncInProgress = true;
    });

    try {
      final backgroundSync = ref.read(backgroundSyncProvider);
      await backgroundSync.syncLinkedAlbum();
      await backgroundSync.syncRemote();
    } catch (_) {
    } finally {
      Future.delayed(const Duration(seconds: 1), () {
        if (!mounted) {
          return;
        }
        setState(() {
          isAlbumSyncInProgress = false;
        });
      });
    }
  }

  Future<void> _manageLinkedAlbums() async {
    final currentUser = ref.read(currentUserProvider);
    if (currentUser == null) {
      return;
    }
    final localAlbums = ref.read(backupAlbumProvider);
    final selectedBackupAlbums = localAlbums
        .where((album) => album.backupSelection == BackupSelection.selected)
        .toList();

    await ref.read(syncLinkedAlbumServiceProvider).manageLinkedAlbums(selectedBackupAlbums, currentUser.id);
  }

  @override
  Widget build(BuildContext context) {
    final albumSyncEnable = ref.watch(appConfigProvider.select((c) => c.backup.syncAlbums));
    return Padding(
      padding: const EdgeInsets.only(left: 8.0),
      child: ListView(
        shrinkWrap: true,
        children: [
          Column(
            children: [
              SettingListTile(
                title: context.t.sync_albums,
                subtitle: context.t.sync_upload_album_setting_subtitle,
                trailing: Switch(
                  value: albumSyncEnable,
                  onChanged: (bool newValue) async {
                    await ref.read(settingsProvider).write(.backupSyncAlbums, newValue);

                    if (newValue == true) {
                      await _manageLinkedAlbums();
                    }
                  },
                ),
              ),
              AnimatedSize(
                duration: const Duration(milliseconds: 300),
                curve: Curves.easeInOut,
                child: AnimatedOpacity(
                  duration: const Duration(milliseconds: 200),
                  opacity: albumSyncEnable ? 1.0 : 0.0,
                  child: albumSyncEnable
                      ? SettingListTile(
                          onTap: _manualSyncAlbums,
                          contentPadding: const EdgeInsets.only(left: 32, right: 16),
                          title: context.t.organize_into_albums,
                          subtitle: context.t.organize_into_albums_description,
                          trailing: isAlbumSyncInProgress
                              ? const SizedBox(
                                  width: 32,
                                  height: 32,
                                  child: CircularProgressIndicator.adaptive(strokeWidth: 2),
                                )
                              : IconButton(
                                  onPressed: _manualSyncAlbums,
                                  icon: const Icon(Icons.sync_rounded),
                                  color: context.colorScheme.onSurface.withValues(alpha: 0.7),
                                  iconSize: 20,
                                  constraints: const BoxConstraints(minWidth: 32, minHeight: 32),
                                ),
                        )
                      : const SizedBox.shrink(),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }
}

class _BackupSwitchTile extends ConsumerWidget {
  final SettingsKey<bool> metadataKey;
  final bool Function(AppConfig) selector;
  final String title;
  final String subtitle;
  final void Function(bool)? onChanged;

  const _BackupSwitchTile({
    required this.metadataKey,
    required this.selector,
    required this.title,
    required this.subtitle,
    this.onChanged,
  });

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final value = ref.watch(appConfigProvider.select(selector));
    return Padding(
      padding: const EdgeInsets.only(left: 8.0),
      child: SettingListTile(
        title: title,
        subtitle: subtitle,
        trailing: Switch(
          value: value,
          onChanged: (bool newValue) async {
            await ref.read(settingsProvider).write(metadataKey, newValue);
            onChanged?.call(newValue);
          },
        ),
      ),
    );
  }
}

class _UseCellularForVideosButton extends StatelessWidget {
  const _UseCellularForVideosButton();

  @override
  Widget build(BuildContext context) {
    return _BackupSwitchTile(
      metadataKey: SettingsKey.backupUseCellularForVideos,
      selector: (c) => c.backup.useCellularForVideos,
      title: context.t.videos,
      subtitle: context.t.network_requirement_videos_upload,
    );
  }
}

class _UseCellularForPhotosButton extends StatelessWidget {
  const _UseCellularForPhotosButton();

  @override
  Widget build(BuildContext context) {
    return _BackupSwitchTile(
      metadataKey: SettingsKey.backupUseCellularForPhotos,
      selector: (c) => c.backup.useCellularForPhotos,
      title: context.t.photos,
      subtitle: context.t.network_requirement_photos_upload,
    );
  }
}

class _BackupOnlyWhenChargingButton extends ConsumerWidget {
  const _BackupOnlyWhenChargingButton();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final fgService = ref.watch(backgroundWorkerFgServiceProvider);
    return _BackupSwitchTile(
      metadataKey: SettingsKey.backupRequireCharging,
      selector: (c) => c.backup.requireCharging,
      title: context.t.charging,
      subtitle: context.t.charging_requirement_mobile_backup,
      onChanged: (value) {
        unawaited(fgService.configure(requireCharging: value));
      },
    );
  }
}

class _BackupDelaySlider extends ConsumerWidget {
  const _BackupDelaySlider();

  static int backupDelayToSliderValue(int ms) => switch (ms) {
    5 => 0,
    30 => 1,
    120 => 2,
    _ => 3,
  };

  static int backupDelayToSeconds(int v) => switch (v) {
    0 => 5,
    1 => 30,
    2 => 120,
    _ => 600,
  };

  static String formatBackupDelaySliderValue(BuildContext context, int v) => switch (v) {
    0 => context.t.setting_notifications_notify_seconds(count: 5),
    1 => context.t.setting_notifications_notify_seconds(count: 30),
    2 => context.t.setting_notifications_notify_minutes(count: 2),
    _ => context.t.setting_notifications_notify_minutes(count: 10),
  };

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final triggerDelay = ref.watch(appConfigProvider.select((c) => c.backup.triggerDelay));
    final currentValue = backupDelayToSliderValue(triggerDelay);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Padding(
          padding: const EdgeInsets.only(left: 24.0, top: 8.0),
          child: Text(
            context.t.backup_controller_page_background_delay(
              duration: formatBackupDelaySliderValue(context, currentValue),
            ),
            style: context.textTheme.bodyLarge?.copyWith(fontWeight: FontWeight.w500),
          ),
        ),
        Slider(
          value: currentValue.toDouble(),
          onChanged: (double v) async {
            final seconds = backupDelayToSeconds(v.toInt());
            await ref.read(settingsProvider).write(SettingsKey.backupTriggerDelay, seconds);
          },
          onChangeEnd: (double v) async {
            final seconds = backupDelayToSeconds(v.toInt());
            await ref.read(settingsProvider).write(SettingsKey.backupTriggerDelay, seconds);
          },
          max: 3.0,
          min: 0.0,
          divisions: 3,
          label: formatBackupDelaySliderValue(context, currentValue),
        ),
      ],
    );
  }
}