from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse


class ApiError(Exception):
    """API error rendered as the protocol's {detail, code} problem shape."""

    def __init__(self, status_code: int, detail: str, code: str) -> None:
        self.status_code = status_code
        self.detail = detail
        self.code = code


def register_exception_handlers(app: FastAPI) -> None:
    @app.exception_handler(ApiError)
    async def handle_api_error(request: Request, exc: ApiError) -> JSONResponse:
        return JSONResponse(
            status_code=exc.status_code,
            content={"detail": exc.detail, "code": exc.code},
        )