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use blst::BLST_ERROR;
use thiserror::Error;

#[derive(Debug, Clone, PartialEq, Eq, Error)]
pub enum Error {
    #[error("SecretKey byte data must be less than the group order")]
    SecretKeyGroupOrder,
    #[error("Given G1 infinity element must be canonical")]
    G1NotCanonical,
    #[error("Given G1 non-infinity element must start with 0b10")]
    G1InfinityInvalidBits,
    #[error("G1 non-infinity element can't have only zeros")]
    G1InfinityNotZero,
    #[error("PublicKey is invalid (BLST ERROR: {0:?})")]
    InvalidPublicKey(BLST_ERROR),
    #[error("Signature is invalid (BLST ERROR: {0:?})")]
    InvalidSignature(BLST_ERROR),
}

pub type Result<T> = std::result::Result<T, Error>;

impl std::convert::From<Error> for chik_traits::Error {
    fn from(err: Error) -> chik_traits::Error {
        chik_traits::Error::Custom(format!("{err}"))
    }
}

#[cfg(feature = "py-bindings")]
use pyo3::PyErr;

#[cfg(feature = "py-bindings")]
impl std::convert::From<Error> for PyErr {
    fn from(err: Error) -> PyErr {
        pyo3::exceptions::PyValueError::new_err(format!("BLS Error {:?}", err))
    }
}