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use crate::io::PgBufMutExt;
use crate::io::{BufMutExt, Encode};

pub struct SaslInitialResponse<'a> {
    pub response: &'a str,
    pub plus: bool,
}

impl Encode<'_> for SaslInitialResponse<'_> {
    fn encode_with(&self, buf: &mut Vec<u8>, _: ()) {
        buf.push(b'p');
        buf.put_length_prefixed(|buf| {
            // name of the SASL authentication mechanism that the client selected
            buf.put_str_nul(if self.plus {
                "SCRAM-SHA-256-PLUS"
            } else {
                "SCRAM-SHA-256"
            });

            buf.extend(&(self.response.as_bytes().len() as i32).to_be_bytes());
            buf.extend(self.response.as_bytes());
        });
    }
}

pub struct SaslResponse<'a>(pub &'a str);

impl Encode<'_> for SaslResponse<'_> {
    fn encode_with(&self, buf: &mut Vec<u8>, _: ()) {
        buf.push(b'p');
        buf.put_length_prefixed(|buf| {
            buf.extend(self.0.as_bytes());
        });
    }
}