pub mod http {
    use std::fs;
    use std::io::BufReader;
    use std::io::prelude::*;
    use std::net::TcpListener;
    use std::net::TcpStream;
    pub struct Server {
        addr: String,
    }

    impl Server {
        pub fn new(addr: String) -> Server {
            Server { addr }
        }

        pub fn start(&self) {
            let listener = TcpListener::bind(self.addr.clone()).unwrap();
            for next_stream in listener.incoming() {
                self.handle(next_stream.unwrap());
            }
        }

        pub fn handle(&self, mut stream: TcpStream) {
            let io = BufReader::new(&stream);
            let request_line = io.lines().next().unwrap().unwrap();

            let (status_line, filename) = match &request_line[..] {
                "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "./public/index.html"),
                "GET /.well-known/oauth-authorization-server HTTP/1.1" => {
                    ("HTTP/1.1 200 OK", "./public/metadata.json")
                }
                _ => ("HTTP/1.1 404 NOT FOUND", "./public/404.html"),
            };

            let contents = fs::read_to_string(filename).unwrap();
            let length = contents.len();
            let response = format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");

            stream.write_all(response.as_bytes()).unwrap();
        }
    }
}