use crate::{cli::Args, domain};
use std::{cell::RefCell, fs::File};

#[derive(Debug)]
pub enum Error {
    OpenFile,
    Switch(domain::switch::Error),
}

pub fn execute(args: &Args) -> Result<(), Error> {
    let reader = File::open(&args.file).map_err(|_| Error::OpenFile)?;
    let writer =
        File::create(args.output.as_ref().unwrap_or(&args.file)).map_err(|_| Error::OpenFile)?;

    domain::switch::execute(domain::switch::Request {
        reader: RefCell::new(reader),
        writer,
        sections: &args.sections,
    })
    .map_err(Error::Switch)
}