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use crate::Error;

pub struct Version {
    pub major: u8,
    pub minor: u8,
    pub revision: u8,
}

impl TryFrom<&str> for Version {
    type Error = Error;

    fn try_from(value: &str) -> std::result::Result<Self, Self::Error> {
        let mut split = value.split('.');

        let (Some(major), Some(minor), Some(revision), None) = (split.next(), split.next(), split.next(), split.next()) else {
            return Err(Error::Client("Cannot parse Redis server version".to_owned()));
        };

        let (Some(major), Some(minor), Some(revision)) = (atoi::atoi(major.as_bytes()), atoi::atoi(minor.as_bytes()), atoi::atoi(revision.as_bytes())) else {
            return Err(Error::Client("Cannot parse Redis server version".to_owned()));
        };

        Ok(Version {
            major,
            minor,
            revision,
        })
    }
}

#[cfg(test)]
mod tests {
    use super::Version;

    #[test]
    fn version() {
        let version: Version = "7.0.0".try_into().unwrap();
        assert_eq!((7, 0, 0), (version.major, version.minor, version.revision));
    }
}