extern crate grep;

use std::env;
use std::fs::File;
use std::io::prelude::*;

struct Config {
    query: String,
    filename: String,
}

fn main() {
    let args: Vec<String> = env::args().collect();

    let conf = parse_config(&args);

    println!("{:?} {:?}", conf.query, conf.filename);

    let mut f = File::open(&conf.filename).expect(&("file not found: ".to_owned() + &conf.filename));
    //let mut f = File::open(filename).expect(&format!("file not found: {}", &filename));

    let mut contents = String::new();
    f.read_to_string(&mut contents)
        .expect("something went wrong reading the file");

    println!("Searching for '{}'", conf.query);
    println!("In file '{}'", conf.filename);
    println!("With text:\n{}", contents);
}

//fn parse_config(args: &[String]) -> (&String, &String)
//fn parse_config(args: &[String]) -> (&str, &str)
fn parse_config(args: &[String]) -> Config {
    Config {
        query: args[1].clone(),
        filename: args[2].clone(),
    }
}