use std::{
    fs::File,
    io::{BufRead, BufReader},
};

use anyhow::Context;

pub fn read_lines(
    file_path: &str,
) -> anyhow::Result<impl Iterator<Item = std::io::Result<String>>, anyhow::Error> {
    if file_path.is_empty() {
        return Err(anyhow::anyhow!("File path cannot be empty"));
    }

    let file =
        File::open(file_path).with_context(|| format!("failed to open file: {file_path}"))?;
    let reader = BufReader::new(file);

    Ok(reader.lines())
}

pub fn consume_lines(iter: impl Iterator<Item = std::io::Result<String>>) {
    for line in iter {
        let line = line.unwrap_or("".into());
        println!("{line}");
    }
}