# Galaxy

Galaxy is a turn-based strategy game which took place in space.

At the highest level Game has a Backend service and an UI Client.

## Backend service

Backend service is presented by several "microservices" with a different set of responsibilities.

- AuthN Proxy Service: handles all incoming requests,
  immediately rejects not-authenticated requests and passes authenticated request to the next service.

- AuthZ Service: checks permissions avaliable to the authenticated user and passes request to the next service
  if user is authorized to use specific game api.

- Games Orchestrator Service:
  - finds appropriate Game Server according to Client's request data,
  - passes user's commands to the selected Game Server,
  - reads response and bounces it back up to request chain to the Client,
  - manages Game Server state for health monitoring and making next turn.

- Game Servers: several instances of ongoing games with avaliable unprotected API ready to receive Player's and Administrator's commands.

## UI Client

UI Client is capable of:

- Register a new player and login for an existing player using only e-mail and one-time codes,
- Enlist to a new Game from available onboard Games list,
- Request list of Games in which Player participating,
- Request, store and display particular Game data,
- Use push-like mechanism for receiving asynchronous updates from Server,
- Offline mode when no internet connection is available or user desired to work offline.