use std::error::Error;
use std::fmt::Display;
use std::io;

pub type ArchiveResult<T, E> = Result<T, ArchiveError<E>>;

#[derive(Debug)]
pub enum ArchiveError<E: Error> {
    IO { error: io::Error },
    Serde { message: String },
    Archivator { module: String, error: E },
}

impl<E: Error> From<io::Error> for ArchiveError<E> {
    fn from(value: io::Error) -> Self {
        Self::IO { error: value }
    }
}

impl<E: Error> Display for ArchiveError<E> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::IO { error } => writeln!(f, "IO: {error}"),
            Self::Serde { message } => writeln!(f, "Serde: {message}"),
            Self::Archivator { module, error } => writeln!(f, "{module}: {error}"),
        }
    }
}

impl<E: Error> Error for ArchiveError<E> {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        match self {
            Self::IO { error } => Some(error),
            Self::Serde { .. } => None,
            Self::Archivator { module, error } => None,
        }
    }
}

impl<E: Error> serde::ser::Error for ArchiveError<E> {
    fn custom<T: Display>(msg: T) -> Self {
        Self::Serde {
            message: msg.to_string(),
        }
    }
}

impl<E: Error> serde::de::Error for ArchiveError<E> {
    fn custom<T: Display>(msg: T) -> Self {
        Self::Serde {
            message: msg.to_string(),
        }
    }
}