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#[derive(Debug)]
pub struct CHR<O> {
    pub(crate) cookies: Vec<http::HeaderValue>,
    pub(crate) headers: Vec<(http::header::HeaderName, http::HeaderValue)>,
    pub(crate) response: O,
}

impl<O> CHR<O> {
    pub(crate) fn new(response: O) -> Self {
        Self {
            cookies: Vec::new(),
            headers: Vec::new(),
            response,
        }
    }
}

pub(crate) fn chr(
    cookies: Vec<http::HeaderValue>,
    headers: Vec<(http::header::HeaderName, http::HeaderValue)>,
    mut response: http::Response<bytes::Bytes>,
) -> Result<http::Response<bytes::Bytes>, ft_sdk::Error> {
    for cookie in cookies.into_iter() {
        response
            .headers_mut()
            .try_append(http::header::SET_COOKIE, cookie)?;
    }
    for (k, v) in headers.into_iter() {
        response.headers_mut().insert(k, v);
    }

    Ok(response)
}

impl<O> CHR<O> {
    pub fn with_cookie(mut self, c: http::HeaderValue) -> Self {
        self.cookies.push(c);
        self
    }

    pub fn with_header(mut self, key: http::HeaderName, value: http::HeaderValue) -> Self {
        self.headers.push((key, value));
        self
    }
}

#[cfg(test)]
mod test {
    #[test]
    fn header() {
        let r = ft_sdk::json(()).unwrap();
        let chr = super::CHR::new(()).with_header(
            http::header::CONTENT_TYPE,
            http::HeaderValue::from_static("text/html"),
        );
        let r = super::chr(chr.cookies, chr.headers, r).unwrap();

        assert_eq!(
            r.headers().get(http::header::CONTENT_TYPE),
            Some(&http::HeaderValue::from_static("text/html"))
        );
    }

    // #[test]
    // fn cookie() {
    //     let r = ft_sdk::json(()).unwrap();
    //     let chr = super::CHR::new(()).with_cookie(("name", "value"));
    //     let r = super::chr(chr.cookies, chr.headers, r).unwrap();
    //
    //     let cookies = r.headers().get_all(http::header::SET_COOKIE);
    //     let mut iter = cookies.iter();
    //     assert_eq!(
    //         iter.next(),
    //         Some(&http::HeaderValue::from_static(
    //             "name=value; Secure; HttpOnly; SameSite=Strict; Max-Age=34560000"
    //         ))
    //     );
    //     assert_eq!(iter.next(), None);
    //
    //     let r = ft_sdk::json(()).unwrap();
    //     let chr = super::CHR::new(()).with_cookie(("name", "value", 200));
    //     let r = super::chr(chr.cookies, chr.headers, r).unwrap();
    //
    //     let cookies = r.headers().get_all(http::header::SET_COOKIE);
    //     let mut iter = cookies.iter();
    //     assert_eq!(
    //         iter.next(),
    //         Some(&http::HeaderValue::from_static(
    //             "name=value; Secure; HttpOnly; SameSite=Strict; Max-Age=200"
    //         ))
    //     );
    //     assert_eq!(iter.next(), None);
    //
    //     let r = ft_sdk::json(()).unwrap();
    //     let chr = super::CHR::new(())
    //         .with_cookie(("name", "value"))
    //         .with_cookie(("n2", "v2"));
    //     let r = super::chr(chr.cookies, chr.headers, r).unwrap();
    //
    //     let cookies = r.headers().get_all(http::header::SET_COOKIE);
    //     let mut iter = cookies.iter();
    //     assert_eq!(
    //         iter.next(),
    //         Some(&http::HeaderValue::from_static(
    //             "name=value; Secure; HttpOnly; SameSite=Strict; Max-Age=34560000"
    //         ))
    //     );
    //     assert_eq!(
    //         iter.next(),
    //         Some(&http::HeaderValue::from_static(
    //             "n2=v2; Secure; HttpOnly; SameSite=Strict; Max-Age=34560000"
    //         ))
    //     );
    // }
    //
    // #[test]
    // fn raw_cookie() {
    //     let r = ft_sdk::json(()).unwrap();
    //     let chr = super::CHR::new(()).with_cookie(http::HeaderValue::from_static("hello"));
    //     let r = super::chr(chr.cookies, chr.headers, r).unwrap();
    //
    //     let cookies = r.headers().get_all(http::header::SET_COOKIE);
    //     let mut iter = cookies.iter();
    //     assert_eq!(iter.next(), Some(&http::HeaderValue::from_static("hello")));
    //     assert_eq!(iter.next(), None);
    //
    //     let r = ft_sdk::json(()).unwrap();
    //     let chr = super::CHR::new(())
    //         .with_cookie(http::HeaderValue::from_static("hello"))
    //         .with_cookie(http::HeaderValue::from_static("hello"));
    //     let r = super::chr(chr.cookies, chr.headers, r).unwrap();
    //
    //     let cookies = r.headers().get_all(http::header::SET_COOKIE);
    //     let mut iter = cookies.iter();
    //     assert_eq!(
    //         iter.next(),
    //         Some(&http::HeaderValue::from_static(
    //             "name=value; Secure; HttpOnly; SameSite=Strict; Max-Age=34560000"
    //         ))
    //     );
    //     assert_eq!(iter.next(), Some(&http::HeaderValue::from_static("hello")));
    // }
}