use abi_stable::{
    std_types::{ RBoxError, RVec},
    StableAbi,
};

use std::{
    error::Error as ErrorTrait,
    fmt::{self, Display},
};

#[repr(u8)]
#[derive(Debug, StableAbi)]
pub enum Error {
    UnsupportedFormat,
    FileError(RBoxError),
    Custom(RBoxError),
    /// A list of errors.
    Many(RVec<Error>),
}


impl Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Error::UnsupportedFormat => {
                writeln!(
                    f,
                    "Plugin  ooes not support this command:\n\
                     \t\n\
                     Because of this error:\n\n\
                     Supported commands:\
                    "
                )?;

                Ok(())
            },
            Error::Custom(e) => Display::fmt(e, f),
            Error::Many(list) => {
                for e in list {
                    writeln!(f, "{}", e)?;
                }
                Ok(())
            },
            _ => { Ok(())}
        }
    }
}

impl ErrorTrait for Error {}