errors.py

from fastapi import FastAPI, Request, status
from fastapi.responses import JSONResponse
from fastapi.exceptions import RequestValidationError
import logging

logger = logging.getLogger("plain_api_errors")

def setup_exception_handlers(app: FastAPI):
    @app.exception_handler(ValueError)
    async def value_error_handler(request: Request, exc: ValueError):
        logger.error(f"Value Error: {exc}")
        return JSONResponse(
            status_code=status.HTTP_400_BAD_REQUEST,
            content={"detail": str(exc)}
        )
        
    @app.exception_handler(RequestValidationError)
    async def validation_exception_handler(request: Request, exc: RequestValidationError):
        logger.error(f"Validation Error: {exc.errors()}")
        return JSONResponse(
            status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
            content={"detail": exc.errors()}
        )
        
    @app.exception_handler(Exception)
    async def general_exception_handler(request: Request, exc: Exception):
        logger.error(f"Unexpected Error: {exc}", exc_info=True)
        return JSONResponse(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            content={"detail": "An internal server error occurred."}
        )