use clap::Parser;
use std::{
    fs::{File, read_to_string},
    io::Write,
    path::PathBuf,
    process::exit,
};

#[derive(Parser, Debug)]
#[command(
    version,
    about,
    long_about = "This fixes files that sometimes get fucked up by Windows not using the stanard \\n notation for new lines."
)]
struct Args {
    #[arg(short, long, help = "the file to fix")]
    input: PathBuf,

    #[arg(short, long, help = "the path to save the fixed file")]
    output: PathBuf,
}

fn main() {
    let args = Args::parse();
    let file_read_res = read_to_string(args.input);
    if file_read_res.is_err() {
        println!("error reading broken file!");
        println!("{}", file_read_res.err().unwrap());
        exit(1);
    }
    let borked_string = file_read_res.unwrap();
    let file_open_res = File::create_new(args.output);
    if file_open_res.is_err() {
        println!("error opening output file!");
        println!("{}", file_open_res.err().unwrap());
        exit(1);
    }
    let mut outfile = file_open_res.unwrap();
    let fixed_lines: Vec<&str> = borked_string.split("\\n").collect();
    for line in fixed_lines {
        write!(outfile, "{}\n", line).unwrap();
    }
}