use thiserror::Error;

#[derive(Error, Debug)]
pub enum Error {
    #[error("Index is too large, must be less than 0x80000000: {0}")]
    IndexTooLarge(u32),

    #[error("Unable to parse integer for index")]
    IntParseError(#[from] std::num::ParseIntError),

    #[error("Unable to parse path due to bad path prefix")]
    UnknownPathPrefix,

    #[error("Seed length in bits must be divisible by 32")]
    BadSeedLength(usize),

    /// This should never happen. HMAC keys should be able to take any size input.
    #[error("Invalid length for HMAC key while generating master key (report me!)")]
    HmacInvalidLength(#[from] hmac::digest::InvalidLength),

    /// There's a 1 in 2^256 chance this will happen. If it does, I'm sorry. Pick a new mnemonic.
    #[error("Seed hash generated 32 bytes of zero, pick a new seed")]
    HashedSeedIsZero,
}

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