use thiserror::Error;

/// Errors that can occur during unsubscribe token operations
#[derive(Debug, Error)]
pub enum UnsubscribeTokenError {
    /// Token format is invalid (should be payload.signature)
    #[error("error-smokesignal-unsubscribe-1 Invalid token format")]
    InvalidTokenFormat,

    /// Signature could not be decoded from base64
    #[error("error-smokesignal-unsubscribe-2 Signature decode error: {0}")]
    SignatureDecodeError(String),

    /// HMAC initialization failed
    #[error("error-smokesignal-unsubscribe-3 HMAC error: {0}")]
    HmacError(String),

    /// Signature verification failed
    #[error("error-smokesignal-unsubscribe-4 Signature verification failed")]
    SignatureVerificationFailed,

    /// Payload format is invalid
    #[error("error-smokesignal-unsubscribe-5 Invalid payload: {0}")]
    InvalidPayload(String),
}