import 'package:flutter/material.dart';
import 'package:game_tracker/core/custom_theme.dart';
import 'package:game_tracker/core/enums.dart';
import 'package:game_tracker/l10n/generated/app_localizations.dart';
import 'package:game_tracker/presentation/widgets/tiles/settings_list_tile.dart';
import 'package:game_tracker/services/data_transfer_service.dart';

class SettingsView extends StatefulWidget {
  const SettingsView({super.key});

  @override
  State<SettingsView> createState() => _SettingsViewState();
}

class _SettingsViewState extends State<SettingsView> {
  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    final loc = AppLocalizations.of(context);
    return ScaffoldMessenger(
      child: Scaffold(
        appBar: AppBar(backgroundColor: CustomTheme.backgroundColor),
        backgroundColor: CustomTheme.backgroundColor,
        body: LayoutBuilder(
          builder: (BuildContext context, BoxConstraints constraints) =>
              SingleChildScrollView(
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.start,
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Padding(
                      padding: const EdgeInsets.fromLTRB(24, 0, 24, 10),
                      child: Text(
                        textAlign: TextAlign.start,
                        loc.menu,
                        style: const TextStyle(
                          fontSize: 28,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    ),
                    Padding(
                      padding: const EdgeInsets.symmetric(
                        horizontal: 24,
                        vertical: 10,
                      ),
                      child: Text(
                        textAlign: TextAlign.start,
                        loc.settings,
                        style: const TextStyle(
                          fontSize: 22,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    ),
                    SettingsListTile(
                      title: loc.export_data,
                      icon: Icons.upload_rounded,
                      suffixWidget: const Icon(Icons.arrow_forward_ios, size: 16),
                      onPressed: () async {
                        final String json =
                            await DataTransferService.getAppDataAsJson(context);
                        final result = await DataTransferService.exportData(
                          json,
                          'game_tracker-data',
                        );
                        if (!context.mounted) return;
                        showExportSnackBar(context: context, result: result);
                      },
                    ),
                    SettingsListTile(
                      title: loc.import_data,
                      icon: Icons.download_rounded,
                      suffixWidget: const Icon(Icons.arrow_forward_ios, size: 16),
                      onPressed: () async {
                        final result = await DataTransferService.importData(
                          context,
                        );
                        if (!context.mounted) return;
                        showImportSnackBar(context: context, result: result);
                      },
                    ),
                    SettingsListTile(
                      title: loc.delete_all_data,
                      icon: Icons.delete_rounded,
                      suffixWidget: const Icon(Icons.arrow_forward_ios, size: 16),
                      onPressed: () {
                        showDialog<bool>(
                          context: context,
                          builder: (context) => AlertDialog(
                            title: Text(loc.delete_all_data),
                            content: Text(loc.this_cannot_be_undone),
                            actions: [
                              TextButton(
                                onPressed: () => Navigator.of(context).pop(false),
                                child: Text(loc.cancel),
                              ),
                              TextButton(
                                onPressed: () => Navigator.of(context).pop(true),
                                child: Text(loc.delete),
                              ),
                            ],
                          ),
                        ).then((confirmed) {
                          if (confirmed == true && context.mounted) {
                            DataTransferService.deleteAllData(context);
                            showSnackbar(
                              context: context,
                              message: AppLocalizations.of(
                                context,
                              ).data_successfully_deleted,
                            );
                          }
                        });
                      },
                    ),
                  ],
                ),
              ),
        ),
      ),
    );
  }

  /// Displays a snackbar based on the import result.
  ///
  /// [context] The BuildContext to show the snackbar in.
  /// [result] The result of the import operation.
  void showImportSnackBar({
    required BuildContext context,
    required ImportResult result,
  }) {
    final loc = AppLocalizations.of(context);
    switch (result) {
      case ImportResult.success:
        showSnackbar(context: context, message: loc.data_successfully_imported);
      case ImportResult.invalidSchema:
        showSnackbar(context: context, message: loc.invalid_schema);
      case ImportResult.fileReadError:
        showSnackbar(context: context, message: loc.error_reading_file);
      case ImportResult.canceled:
        showSnackbar(context: context, message: loc.import_canceled);
      case ImportResult.formatException:
        showSnackbar(context: context, message: loc.format_exception);
      case ImportResult.unknownException:
        showSnackbar(context: context, message: loc.unknown_exception);
    }
  }

  /// Displays a snackbar based on the export result.
  ///
  /// [context] The BuildContext to show the snackbar in.
  /// [result] The result of the export operation.
  void showExportSnackBar({
    required BuildContext context,
    required ExportResult result,
  }) {
    final loc = AppLocalizations.of(context);
    switch (result) {
      case ExportResult.success:
        showSnackbar(context: context, message: loc.data_successfully_exported);
      case ExportResult.canceled:
        showSnackbar(context: context, message: loc.export_canceled);
      case ExportResult.unknownException:
        showSnackbar(context: context, message: loc.unknown_exception);
    }
  }

  /// Displays a snackbar with the given message and optional action.
  ///
  /// [context] The BuildContext to show the snackbar in.
  /// [message] The message to display in the snackbar.
  /// [duration] The duration for which the snackbar is displayed.
  /// [action] An optional callback function to execute when the action button is pressed.
  void showSnackbar({
    required BuildContext context,
    required String message,
    Duration duration = const Duration(seconds: 3),
    VoidCallback? action,
  }) {
    final loc = AppLocalizations.of(context);
    final messenger = ScaffoldMessenger.of(context);
    messenger.hideCurrentSnackBar();
    messenger.showSnackBar(
      SnackBar(
        content: Text(message, style: const TextStyle(color: Colors.white)),
        backgroundColor: CustomTheme.onBoxColor,
        duration: duration,
        action: action != null
            ? SnackBarAction(label: loc.undo, onPressed: action)
            : null,
      ),
    );
  }
}