This Android application displays a list of Pokemon and their detailed information, built using modern Android development practices with Clean Architecture and Jetpack Compose.

The app follows Clean Architecture principles with clear separation of concerns across five distinct layers:

• pokemon-ui: Jetpack Compose UI components and screens
• pokemon-presentation: ViewModels and UI state management
• pokemon-domain: Use cases and domain models
• pokemon-datasource: Network client and data source
• pokemon-data: Repository implementation

• View Layer (pokemon-ui): Compose UI components observe ViewModel state and forward user interactions
• ViewModel Layer (pokemon-presentation): Manages UI state with StateFlow, coordinates with domain use cases, and handles lifecycle management
• Model Layer (pokemon-domain + pokemon-data): Domain models and use cases provide clean API to ViewModels through repository pattern

Layer Separation with Mappers

• Implemented mapping between all layers (API → Data → Domain → Presentation → UI)

Jetpack Compose for UI

• Chose Compose for modern, declarative UI development
• Enables easier testing with Compose testing framework

Repository Pattern

• Centralized data access through repositories in the datasource layer
• Enables easy switching between different data sources (network, cache, database)

• Pokemon List Screen: Displays a Grid list of Pokemon with basic information (id, name and Image)
• Pokemon Detail Screen: Shows height and name details for a selected Pokemon
• Navigation: Seamless navigation between list and detail view

• Unit Tests: Comprehensive testing for all mapper functions ensuring data integrity across layers
• UI Tests: Compose-based testing for both List Screen and Detail Screen user interactions

Offline Support

• No local database implementation (Room)
• Decision: Focused on demonstrating clean architecture and modern UI patterns within time constraints

No Pagination

• No lazy loading of pokemon items
• Decision: Focused on demonstrating core list implementation within time constraints

Design Improvements

• Improve on the overall design of the app - for Light and Dark theme
• Decision: Focused on displaying core UI within time constraints

Other Features

• No search/filtering functionality
• Decision: Concentrated on solid foundation architecture that would easily support these features

Scalability Considerations

• The modular architecture supports easy addition of new features
• Each layer can be modified independently without affecting others

Testing Strategy

• Focused on testing critical business logic (mappers) and user-facing functionality (UI)
• Compose testing framework provides reliable UI test coverage
• Unit tests ensure data integrity across architectural boundaries