You are an expert software architect. Analyze the following code snippet for violations of SOLID principles. Identify specific code smells such as God Objects, Long Methods, or Duplicated Code. Provide a refactored version of the code that adheres strictly to the Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion principles. Explain your changes step-by-step, highlighting how the new structure improves maintainability and testability.