use std::vec::Vec;

#[derive(Copy, Clone)]
pub enum Status {
    Input = 10,
    Success = 20,
    Redirect = 30,
    TemporaryFailure = 40,
    PermanentFailure = 50,
    ClientCertificateRequired = 60,
}

pub struct Header {
    status: Status,
    meta: String,
}

impl Header {
    pub fn new(status: Status, meta: &str) -> Header {
        Header {
            status: status,
            meta: meta.to_string(),
        }
    }

    pub fn format(&self) -> String {
        format!("{} {}\r\n", self.status as u8, self.meta)
    }

    pub fn to_vec(&self) -> Vec<u8> {
        self.format().as_bytes().to_vec()
    }
}

pub fn invalid_protocol() -> Header {
    Header::new(Status::PermanentFailure, "this protocol is not supported")
}

pub fn not_understood() -> Header {
    Header::new(Status::PermanentFailure, "request not understood")
}

pub fn not_found() -> Header {
    Header::new(Status::PermanentFailure, "resource not found")
}

pub fn internal_error() -> Header {
    Header::new(Status::PermanentFailure, "internal server error")
}