use actix_web::{HttpResponse, ResponseError};
use std::fmt;

/// Wraps any error so it can be returned with `?` from request handlers.
/// Always surfaces as a 500 to the client; the real error is logged.
pub struct AppError(anyhow::Error);

impl fmt::Debug for AppError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmt::Debug::fmt(&self.0, f)
    }
}

impl fmt::Display for AppError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmt::Display::fmt(&self.0, f)
    }
}

impl ResponseError for AppError {
    fn error_response(&self) -> HttpResponse {
        log::error!("Unhandled error: {:?}", self.0);
        HttpResponse::InternalServerError().finish()
    }
}

impl<E> From<E> for AppError
where
    E: Into<anyhow::Error>,
{
    fn from(err: E) -> Self {
        AppError(err.into())
    }
}