use clap::Parser;

// Search for a pattern in a file and display the lines that contain it.
#[derive(Parser)]
struct Cli {
    pattern: String,
    path: std::path::PathBuf,
}

fn main() -> Result<(), Box<dyn std::error::Error>>{
    let args = Cli::parse();

    // let content = std::fs::read_to_string(&args.path).expect("Could not read file.");

    let result = std::fs::read_to_string(&args.path);
    let content = match result {
        Ok(content) => {
            content
        },
        Err(error) => {
            return Err(error.into());
        }
    };

    for line in content.lines() {
        if line.contains(&args.pattern) {
            println!("{}", line)
        }
    }

    Ok(())
}