using System.Collections.Generic;

namespace Domain {
	public class KeyHistory {
		private readonly List<int> _lastPresses = new();
		private readonly List<int> _desiredSequence;

		public KeyHistory(List<int> desiredSequence) {
			_desiredSequence = desiredSequence;
		}

		public void KeyPressed(int key) => _lastPresses.Add(key);
		public void ClearPressed() => _lastPresses.Clear();

		public bool ContainsSequence() {
			if (_lastPresses.Count < _desiredSequence.Count)
				return false;

			for (int i = 0; i < _lastPresses.Count; i++) {
				if (i >= _desiredSequence.Count)
					break;

				int keyPressed = _lastPresses[_lastPresses.Count - 1 - i];
				int sequenceKey = _desiredSequence[_desiredSequence.Count - 1 - i];

				if (keyPressed != sequenceKey) {
					return false;
				}
			}

			return true;
		}
	}
}