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    /*
    * Copyright (C) 2021  Aravinth Manivannan <realaravinth@batsense.net>
    *
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero General Public License as
    * published by the Free Software Foundation, either version 3 of the
    * License, or (at your option) any later version.
    *
    * This program is distributed in the hope that it will be useful,
    * but WITHOUT ANY WARRANTY; without even the implied warranty of
    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    * GNU Affero General Public License for more details.
    *
    * You should have received a copy of the GNU Affero General Public License
    * along with this program.  If not, see <https://www.gnu.org/licenses/>.
    */

    use actix_web::body::Body;
    use actix_web::{get, web, HttpResponse, Responder};
    use mime_guess::from_path;
    use rust_embed::RustEmbed;

    use std::borrow::Cow;

    #[derive(RustEmbed)]
    #[folder = "docs/"]
    struct Asset;

    pub fn handle_embedded_file(path: &str) -> HttpResponse {
        match Asset::get(path) {
            Some(content) => {
                let body: Body = match content {
                    Cow::Borrowed(bytes) => bytes.into(),
                    Cow::Owned(bytes) => bytes.into(),
                };
                HttpResponse::Ok()
                    .content_type(from_path(path).first_or_octet_stream().as_ref())
                    .body(body)
            }
            None => HttpResponse::NotFound().body("404 Not Found"),
        }
    }

    #[get("/docs/{_:.*}")]
    async fn dist(path: web::Path<String>) -> impl Responder {
        handle_embedded_file(&path.0)
    }

    #[get("/docs/openapi.json")]
    async fn spec() -> HttpResponse {
        HttpResponse::Ok()
            .content_type("appilcation/json")
            .body(&*crate::OPEN_API_DOC)
    }

    #[get("/docs")]
    async fn index() -> HttpResponse {
        handle_embedded_file("index.html")
    }

    pub fn services(cfg: &mut web::ServiceConfig) {
        cfg.service(spec);
        cfg.service(index);
        cfg.service(dist);
    }

    #[cfg(test)]
    mod tests {
        use actix_web::http::StatusCode;
        use actix_web::test;

        use super::*;
        use crate::*;

        #[actix_rt::test]
        async fn docs_work() {
            const INDEX: &str = "/docs";
            const FILE: &str = "/docs/favicon-32x32.png";
            const SPEC: &str = "/docs/openapi.json";

            let mut app = test::init_service(App::new().configure(services)).await;

            let resp =
                test::call_service(&mut app, test::TestRequest::get().uri(INDEX).to_request()).await;
            assert_eq!(resp.status(), StatusCode::OK);

            let resp =
                test::call_service(&mut app, test::TestRequest::get().uri(FILE).to_request()).await;
            assert_eq!(resp.status(), StatusCode::OK);

            let resp =
                test::call_service(&mut app, test::TestRequest::get().uri(SPEC).to_request()).await;
            assert_eq!(resp.status(), StatusCode::OK);
        }
    }