graph LR
%% C4 style classes c4model.com %%
classDef person fill:#08427b,stroke:black,color:white;
classDef container fill:#1168bd,stroke:black,color:white;
classDef database fill:#1168bd,stroke:black,color:white;
classDef software fill:#1168bd,stroke:black,color:white;
classDef existing fill:#999999,stroke:black,color:white;
classDef boundary fill:white,stroke:black,stroke-width:2px,stroke-dasharray: 5 5;
classDef frame fill:white,stroke:black;
%% nodes %%
GitHub["GitHub API"]:::existing
Mistral["Mistral AI API"]:::existing
Admin((Admin)):::person
Student((Student)):::person
WebApp("Admin Panel <br>[Container: Nginx + React]"):::container
CoreAPI("Core API <br>[Container: FastAPI]"):::container
Worker("LLM Grader <br>[Container: FastStream]"):::container
GitHubGateway("GitHub Gateway <br>[Container: FastAPI]"):::container
CoreDB[("Core Data <br>[Container: PostgreSQL]")]:::database
S3[("Submissions <br>[Container: Minio]")]:::database
Events(["Events <br>[Container: Kafka Topic]"]):::container
TGBot("Student Bot <br>[Container: Aiogram]"):::container
%% connections and boundaries %%
subgraph Legend [Containers]
Student-.->|Uses| TGBot
Admin-.->|Uses| WebApp
subgraph Boundary["Boundary: System"]
WebApp-.->|"Makes requests <br> [HTTP/HTTPS]"| CoreAPI
CoreAPI-.->|"Makes requests <br> [HTTP/HTTPS]"| GitHubGateway
CoreAPI-.->|"Makes requests <br> [TCP]"| CoreDB
CoreAPI-.->|"Makes requests <br> [HTTP/HTTPS]"| S3
Worker-.->|"Makes requestts <br> [HTTP/HTTPS]"| CoreAPI
Worker-.->|"Makes requests <br> [HTTP/HTTPS]"| S3
CoreAPI-.->|"Pushes event <br> [TCP]"| Events
TGBot-.->|"Pulls event <br> [TCP]"| Events
Worker-.->|"Pulls event <br> [TCP]"| Events
GitHubGateway-.->|"Pushes/pulls event <br> [TCP]"| Events
TGBot-.->|"Makes requests <br> [HTTP/HTTPS]"| GitHubGateway
TGBot-.->|"Makes requests <br> [HTTP/HTTPS]"| CoreAPI
end
class Boundary boundary
GitHubGateway-.->|"Makes requests <br> [HTTP/HTTPS]"| GitHub
Worker-.->|"Makes requests <br> [HTTP/HTTPS]"| Mistral
end
class Legend frame
