use thiserror::Error;
use uuid::Uuid;

#[derive(Debug, Error)]
pub enum TxError {
    #[error("Command not found: {0}")]
    NotFound(Uuid),

    #[error("Command already applied (idempotency key: {0})")]
    AlreadyApplied(String),

    #[error("Cannot roll back a command in status {0:?}")]
    InvalidStatus(String),

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

    #[error("JSON error: {0}")]
    Json(#[from] serde_json::Error),

    #[error("Storage error: {0}")]
    Storage(#[from] sled::Error),

    #[error("Engram error: {0}")]
    Engram(#[from] engram_core::EngramError),

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

pub type TxResult<T> = Result<T, TxError>;