use thiserror::Error;

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

#[derive(Debug, Error)]
pub enum Error {
    #[error("storage error: {0}")]
    Storage(String),

    #[error("transport error: {0}")]
    Transport(String),

    #[error("mls protocol error: {0}")]
    Mls(String),

    #[error("identity error: {0}")]
    Identity(String),

    #[error("unknown conversation: {0}")]
    UnknownConversation(String),

    #[error("unknown device: {0}")]
    UnknownDevice(String),

    #[error("epoch occupied: caller must rebase on the new epoch and retry")]
    EpochOccupied,

    #[error("codec error: {0}")]
    Codec(String),

    #[error("invalid input: {0}")]
    Invalid(String),

    #[error("not initialised")]
    NotInitialised,
}

impl Error {
    pub(crate) fn mls<E: std::fmt::Display>(e: E) -> Self {
        Error::Mls(e.to_string())
    }
    pub(crate) fn codec<E: std::fmt::Display>(e: E) -> Self {
        Error::Codec(e.to_string())
    }
}
