use std::fmt;

#[derive(Debug)]
pub enum Error {
    Redis(redis::RedisError),
    Serialization(serde_json::Error),
    NotFound(String),
    InvalidInput(String),
    Config(String),
    Io(std::io::Error),
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Error::Redis(e) => write!(f, "Redis error: {}", e),
            Error::Serialization(e) => write!(f, "Serialization error: {}", e),
            Error::NotFound(msg) => write!(f, "Not found: {}", msg),
            Error::InvalidInput(msg) => write!(f, "Invalid input: {}", msg),
            Error::Config(msg) => write!(f, "Configuration error: {}", msg),
            Error::Io(e) => write!(f, "IO error: {}", e),
        }
    }
}

impl std::error::Error for Error {}

impl From<redis::RedisError> for Error {
    fn from(e: redis::RedisError) -> Self {
        Error::Redis(e)
    }
}

impl From<serde_json::Error> for Error {
    fn from(e: serde_json::Error) -> Self {
        Error::Serialization(e)
    }
}

impl From<std::io::Error> for Error {
    fn from(e: std::io::Error) -> Self {
        Error::Io(e)
    }
}

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