import '../entities/exercise_entry.dart';

/// Persistence contract for the resistance-training log.
///
/// Pure Dart (no framework imports). The current implementation is an
/// in-memory session store; a drift-backed repository (SQLCipher on native
/// platforms) will implement the same contract without touching the
/// presentation layer.
abstract class IExerciseRepository {
  /// All logged entries, newest first, optionally restricted to the
  /// half-open interval `[from, to)`.
  Future<List<ExerciseEntry>> getEntries({DateTime? from, DateTime? to});

  /// Inserts a new entry.
  Future<void> saveEntry(ExerciseEntry entry);

  /// Removes the entry with [id], if present.
  Future<void> deleteEntry(String id);
}