use std::{
    fmt::{Debug, Display, Formatter},
    path::PathBuf,
};

#[derive(Debug)]
pub enum Error {
    IOError(std::io::Error),
    InvalidObjectType(u32),
    InvalidSectionName,
    MissingSectionHeader(&'static str),
    MissingSectionData(&'static str),
    InvalidSectionData,
    ParseError(Box<dyn std::error::Error>),
    LinkingError(Trace),
}

// "backtrace" for error origin
#[derive(Debug)]
pub struct Trace {
    origin: PathBuf,
    offset: u64, // 0 indicates unknown/invalid
    source_info: Option<Box<dyn SourceInfo>>,
}

pub trait SourceInfo: Debug + Display {
    fn line(&self) -> u64;

    // todo
}

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

impl Display for Error {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        write!(f, "TODO!")
    }
}

impl Display for Trace {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        write!(f, "TODO!")
    }
}