use std::ops::Deref;

use oauth2::http;

#[derive(Clone, Debug)]
pub struct HttpAuthClient(reqwest::Client);

impl From<reqwest::Client> for HttpAuthClient {
    fn from(value: reqwest::Client) -> Self {
        Self(value)
    }
}

impl Deref for HttpAuthClient {
    type Target = reqwest::Client;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl<'c> oauth2::AsyncHttpClient<'c> for HttpAuthClient {
    type Error = oauth2::HttpClientError<reqwest::Error>;

    #[cfg(target_arch = "wasm32")]
    type Future = Pin<Box<dyn Future<Output = Result<HttpResponse, Self::Error>> + 'c>>;
    #[cfg(not(target_arch = "wasm32"))]
    type Future = std::pin::Pin<
        Box<dyn Future<Output = Result<oauth2::HttpResponse, Self::Error>> + Send + Sync + 'c>,
    >;

    fn call(&'c self, request: oauth2::HttpRequest) -> Self::Future {
        Box::pin(async move {
            let response = self
                .0
                .execute(request.try_into().map_err(Box::new)?)
                .await
                .map_err(Box::new)?;

            let mut builder = http::Response::builder().status(response.status());

            #[cfg(not(target_arch = "wasm32"))]
            {
                builder = builder.version(response.version());
            }

            for (name, value) in response.headers().iter() {
                builder = builder.header(name, value);
            }

            builder
                .body(response.bytes().await.map_err(Box::new)?.to_vec())
                .map_err(oauth2::HttpClientError::Http)
        })
    }
}