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use nom::{bytes::streaming::tag_no_case, combinator::value, IResult};

use crate::{
    parse::core::atom,
    types::{AuthMechanism, CompressionAlgorithm},
};

pub mod address;
pub mod body;
pub mod command;
pub mod core;
pub mod datetime;
pub mod envelope;
pub mod flag;
pub mod mailbox;
pub mod message;
pub mod response;
pub mod section;
pub mod sequence;
pub mod status;

// ----- Unsorted IMAP parsers -----

/// auth-type = atom
///
/// Note: Defined by [SASL]
pub(crate) fn auth_type(input: &[u8]) -> IResult<&[u8], AuthMechanism> {
    let (rem, mechanism) = atom(input)?;

    Ok((rem, mechanism.to_owned().into()))
}

/// algorithm = "DEFLATE"
pub fn algorithm(input: &[u8]) -> IResult<&[u8], CompressionAlgorithm> {
    value(CompressionAlgorithm::Deflate, tag_no_case("DEFLATE"))(input)
}

#[cfg(test)]
mod test {
    use std::convert::TryInto;

    use super::auth_type;
    use crate::types::AuthMechanism;

    #[test]
    fn test_auth_type() {
        let tests = [
            (b"plain ".as_ref(), AuthMechanism::Plain),
            (b"pLaiN ".as_ref(), AuthMechanism::Plain),
            (b"lOgiN ".as_ref(), AuthMechanism::Login),
            (b"login ".as_ref(), AuthMechanism::Login),
            (
                b"loginX ".as_ref(),
                AuthMechanism::Other("loginX".try_into().unwrap()),
            ),
            (
                b"Xplain ".as_ref(),
                AuthMechanism::Other("Xplain".try_into().unwrap()),
            ),
        ];

        for (test, expected) in tests.iter() {
            let (rem, got) = auth_type(test).unwrap();
            assert_eq!(*expected, got);
            assert_eq!(rem, b" ");
        }
    }
}