import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';

class Tools {
  Tools._();

  /// Builds a formatted time string from two date strings in the format 'YYYY-MM'.
  ///
  /// Returns a string in the format 'Month Year - Month Year' using localized month names.
  /// Returns an empty string if either input is empty or invalid.
  ///
  /// Parameters:
  /// - [startDate]: String in 'YYYY-MM' format (e.g., '2024-03')
  /// - [endDate]: String in 'YYYY-MM' format (e.g., '2024-12')
  /// - [context]: BuildContext for accessing localizations
  ///
  /// Example:
  /// ```dart
  /// final timeString = buildTimeString('2024-03', '2024-12', context);
  /// // Returns "March 2024 - December 2024" (or localized equivalent)
  /// ```
  static String buildTimeString(
      String startDate, String endDate, BuildContext context) {
    // Check for empty or null inputs
    if (startDate.isEmpty || endDate.isEmpty) {
      return '';
    }

    try {
      // Validate date format
      if (!startDate.contains(RegExp(r'^\d{4}-\d{2}$')) ||
          !endDate.contains(RegExp(r'^\d{4}-\d{2}$'))) {
        return '';
      }

      // Parse dates with validation
      final firstDate = DateTime.tryParse('$startDate-01');
      final secondDate = DateTime.tryParse('$endDate-01');

      // Check if parsing was successful
      if (firstDate == null || secondDate == null) {
        return '';
      }

      // Build the formatted string
      return '${getLocalizedMonth(context, firstDate.month)} ${firstDate.year} - '
          '${getLocalizedMonth(context, secondDate.month)} ${secondDate.year}';
    } catch (e) {
      // Handle any unexpected errors
      debugPrint('Error building time string: $e');
      return '';
    }
  }

  /// Returns the localized month name as a [String] based on the provided month number.
  ///
  /// The [context] is used to access the app's localizations.
  /// The [monthNumber] must be between 1 and 12, where 1 represents January
  /// and 12 represents December.
  ///
  /// Throws an [ArgumentError] if the month number is not between 1 and 12.
  ///
  /// Example:
  /// ```dart
  /// final monthName = getLocalizedMonth(context, 3); // Returns "March" or "März"
  /// ```
  static String getLocalizedMonth(BuildContext context, int monthNumber) {
    final localizations = AppLocalizations.of(context)!;

    switch (monthNumber) {
      case 1:
        return localizations.january;
      case 2:
        return localizations.february;
      case 3:
        return localizations.march;
      case 4:
        return localizations.april;
      case 5:
        return localizations.may;
      case 6:
        return localizations.june;
      case 7:
        return localizations.july;
      case 8:
        return localizations.august;
      case 9:
        return localizations.september;
      case 10:
        return localizations.october;
      case 11:
        return localizations.november;
      case 12:
        return localizations.december;
      default:
        throw ArgumentError('Month number must be between 1 and 12');
    }
  }

  static String getLocaleFromPath(String path) {
    if (path.startsWith('/de')) {
      return 'de';
    } else if (path.startsWith('/en')) {
      return 'en';
    }
    return 'de'; // Default fallback
  }
}