use actix_web::http::header::IntoHeaderValue;
use actix_web::HttpResponse;
use std::fmt::{Debug, Display};
use std::str::FromStr;

pub fn redirect(path: impl IntoHeaderValue) -> actix_web::Result<HttpResponse> {
    Ok(HttpResponse::SeeOther()
        .header("location", path) // back - to where?
        .finish())
}

pub trait ParseOrBadReq {
    fn parse_or_bad_request<T, E>(&self) -> actix_web::Result<T>
    where
        T: FromStr<Err = E>,
        E: Display + Debug + 'static;
}

impl ParseOrBadReq for &str {
    fn parse_or_bad_request<T, E>(&self) -> actix_web::Result<T>
    where
        T: FromStr<Err = E>,
        E: Display + Debug + 'static,
    {
        self.parse::<T>().map_err(|e| {
            error!("Parse error for \"{}\"", self);
            actix_web::error::ErrorBadRequest(e)
        })
    }
}

impl ParseOrBadReq for String {
    fn parse_or_bad_request<T, E>(&self) -> actix_web::Result<T>
    where
        T: FromStr<Err = E>,
        E: Display + Debug + 'static,
    {
        self.as_str().parse_or_bad_request()
    }
}