use serde::{Deserialize,Serialize,Deserializer};

#[derive(Eq, PartialEq, Clone, Serialize, Debug, Deserialize)]
pub enum TotpAlgorithm {
  Sha1,
  Sha256,
  Sha512,
}
impl Default for TotpAlgorithm {
    fn default() -> Self {
       TotpAlgorithm::Sha1
    }
}
impl std::fmt::Display for TotpAlgorithm {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            TotpAlgorithm::Sha1 => write!(f,"sha1"),
            TotpAlgorithm::Sha256 => write!(f,"sha256"),
            TotpAlgorithm::Sha512 => write!(f,"sha512"),
        }
    }
}
impl TotpAlgorithm {
    pub fn from_str(value: &str) -> TotpAlgorithm {
        match value {
            "sha1" |  "SHA1" => TotpAlgorithm::Sha1,
            "sha512" |  "SHA512" => TotpAlgorithm::Sha512,
            "sha256" |  "SHA256" => TotpAlgorithm::Sha256,
            _ => TotpAlgorithm::default(),
        }
    }
}
pub fn deserialize_totp_algorithm<'de, D>(deserializer: D) -> Result<TotpAlgorithm, D::Error>
where D: Deserializer<'de> {
    let buf = String::deserialize(deserializer)?;
    Ok(TotpAlgorithm::from_str(&buf))
}