// @dart=2.9

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:photos/ente_theme_data.dart';
import 'package:photos/models/backup_status.dart';
import 'package:photos/models/duplicate_files.dart';
import 'package:photos/services/deduplication_service.dart';
import 'package:photos/services/sync_service.dart';
import 'package:photos/theme/ente_theme.dart';
import 'package:photos/ui/backup_folder_selection_page.dart';
import 'package:photos/ui/backup_settings_screen.dart';
import 'package:photos/ui/components/captioned_text_widget.dart';
import 'package:photos/ui/components/expandable_menu_item_widget.dart';
import 'package:photos/ui/components/menu_item_widget.dart';
import 'package:photos/ui/settings/common_settings.dart';
import 'package:photos/ui/tools/deduplicate_page.dart';
import 'package:photos/ui/tools/free_space_page.dart';
import 'package:photos/utils/data_util.dart';
import 'package:photos/utils/dialog_util.dart';
import 'package:photos/utils/navigation_util.dart';
import 'package:photos/utils/toast_util.dart';
import 'package:url_launcher/url_launcher_string.dart';

class BackupSectionWidget extends StatefulWidget {
  const BackupSectionWidget({Key key}) : super(key: key);

  @override
  BackupSectionWidgetState createState() => BackupSectionWidgetState();
}

class BackupSectionWidgetState extends State<BackupSectionWidget> {
  @override
  Widget build(BuildContext context) {
    return ExpandableMenuItemWidget(
      title: "Backup",
      selectionOptionsWidget: _getSectionOptions(context),
      leadingIcon: Icons.backup_outlined,
    );
  }

  Widget _getSectionOptions(BuildContext context) {
    final List<Widget> sectionOptions = [
      sectionOptionSpacing,
      MenuItemWidget(
        captionedTextWidget: const CaptionedTextWidget(
          title: "Backed up folders",
        ),
        pressedColor: getEnteColorScheme(context).fillFaint,
        trailingIcon: Icons.chevron_right_outlined,
        trailingIconIsMuted: true,
        onTap: () {
          routeToPage(
            context,
            const BackupFolderSelectionPage(
              buttonText: "Backup",
            ),
          );
        },
      ),
      sectionOptionSpacing,
      MenuItemWidget(
        captionedTextWidget: const CaptionedTextWidget(
          title: "Backup settings",
        ),
        pressedColor: getEnteColorScheme(context).fillFaint,
        trailingIcon: Icons.chevron_right_outlined,
        trailingIconIsMuted: true,
        onTap: () {
          routeToPage(
            context,
            const BackupSettingsScreen(),
          );
        },
      ),
      sectionOptionSpacing,
    ];

    sectionOptions.addAll(
      [
        MenuItemWidget(
          captionedTextWidget: const CaptionedTextWidget(
            title: "Free up device space",
          ),
          pressedColor: getEnteColorScheme(context).fillFaint,
          trailingIcon: Icons.chevron_right_outlined,
          trailingIconIsMuted: true,
          onTap: () async {
            final dialog = createProgressDialog(context, "Calculating...");
            await dialog.show();
            BackupStatus status;
            try {
              status = await SyncService.instance.getBackupStatus();
            } catch (e) {
              await dialog.hide();
              showGenericErrorDialog(context);
              return;
            }

            await dialog.hide();
            if (status.localIDs.isEmpty) {
              showErrorDialog(
                context,
                "✨ All clear",
                "You've no files on this device that can be deleted",
              );
            } else {
              final bool result =
                  await routeToPage(context, FreeSpacePage(status));
              if (result == true) {
                _showSpaceFreedDialog(status);
              }
            }
          },
        ),
        sectionOptionSpacing,
        MenuItemWidget(
          captionedTextWidget: const CaptionedTextWidget(
            title: "Remove duplicates",
          ),
          pressedColor: getEnteColorScheme(context).fillFaint,
          trailingIcon: Icons.chevron_right_outlined,
          trailingIconIsMuted: true,
          onTap: () async {
            final dialog = createProgressDialog(context, "Calculating...");
            await dialog.show();
            List<DuplicateFiles> duplicates;
            try {
              duplicates =
                  await DeduplicationService.instance.getDuplicateFiles();
            } catch (e) {
              await dialog.hide();
              showGenericErrorDialog(context);
              return;
            }

            await dialog.hide();
            if (duplicates.isEmpty) {
              showErrorDialog(
                context,
                "✨ No duplicates",
                "You've no duplicate files that can be cleared",
              );
            } else {
              final DeduplicationResult result =
                  await routeToPage(context, DeduplicatePage(duplicates));
              if (result != null) {
                _showDuplicateFilesDeletedDialog(result);
              }
            }
          },
        ),
        sectionOptionSpacing,
      ],
    );
    return Column(
      children: sectionOptions,
    );
  }

  void _showSpaceFreedDialog(BackupStatus status) {
    final AlertDialog alert = AlertDialog(
      title: const Text("Success"),
      content: Text(
        "You have successfully freed up " + formatBytes(status.size) + "!",
      ),
      actions: [
        TextButton(
          child: Text(
            "Rate us",
            style: TextStyle(
              color: Theme.of(context).colorScheme.greenAlternative,
            ),
          ),
          onPressed: () {
            Navigator.of(context, rootNavigator: true).pop('dialog');
            // TODO: Replace with https://pub.dev/packages/in_app_review
            if (Platform.isAndroid) {
              launchUrlString(
                "https://play.google.com/store/apps/details?id=io.ente.photos",
              );
            } else {
              launchUrlString(
                "https://apps.apple.com/in/app/ente-photos/id1542026904",
              );
            }
          },
        ),
        TextButton(
          child: const Text(
            "Ok",
          ),
          onPressed: () {
            if (Platform.isIOS) {
              showToast(
                context,
                "Also empty \"Recently Deleted\" from \"Settings\" -> \"Storage\" to claim the freed space",
              );
            }
            Navigator.of(context, rootNavigator: true).pop('dialog');
          },
        ),
      ],
    );
    showConfettiDialog(
      context: context,
      builder: (BuildContext context) {
        return alert;
      },
      barrierColor: Colors.black87,
      confettiAlignment: Alignment.topCenter,
      useRootNavigator: true,
    );
  }

  void _showDuplicateFilesDeletedDialog(DeduplicationResult result) {
    final String countText = result.count.toString() +
        " duplicate file" +
        (result.count == 1 ? "" : "s");
    final AlertDialog alert = AlertDialog(
      title: const Text("✨ Success"),
      content: Text(
        "You have cleaned up " +
            countText +
            ", saving " +
            formatBytes(result.size) +
            "!",
      ),
      actions: [
        TextButton(
          child: Text(
            "Rate us",
            style: TextStyle(
              color: Theme.of(context).colorScheme.greenAlternative,
            ),
          ),
          onPressed: () {
            Navigator.of(context, rootNavigator: true).pop('dialog');
            // TODO: Replace with https://pub.dev/packages/in_app_review
            if (Platform.isAndroid) {
              launchUrlString(
                "https://play.google.com/store/apps/details?id=io.ente.photos",
              );
            } else {
              launchUrlString(
                "https://apps.apple.com/in/app/ente-photos/id1542026904",
              );
            }
          },
        ),
        TextButton(
          child: const Text(
            "Ok",
          ),
          onPressed: () {
            showToast(
              context,
              "Also empty your \"Trash\" to claim the freed up space",
            );
            Navigator.of(context, rootNavigator: true).pop('dialog');
          },
        ),
      ],
    );
    showConfettiDialog(
      context: context,
      builder: (BuildContext context) {
        return alert;
      },
      barrierColor: Colors.black87,
      confettiAlignment: Alignment.topCenter,
      useRootNavigator: true,
    );
  }
}