minigrepbk 0.1.0

use std::env;
use std::error::Error;
use std::fs;
use std::process;

use minigrepbk::{search, search_case_insensitive};

fn main() {
    let config = Config::build(env::args()).unwrap_or_else(|err| {
        eprintln!("Problem parsing args: {err}");
        process::exit(1);
    });

    if let Err(e) = run(config) {
      eprintln!("Application error: {e}");
      process::exit(1)
    };
}

fn run(config: Config) -> Result<(), Box<dyn Error>> {
    let contents = fs::read_to_string(config.file_path)?;
    println!("Query: {}", config.query);
    let results: Box<dyn Iterator<Item = &str>> = if config.ignore_case {
        Box::new(search_case_insensitive(&config.query, &contents))
    } else {
        Box::new(search(&config.query, &contents))
    };

    for line in results {
      println!("{line}")
    }

    Ok(())
}

struct Config {
    query: String,
    file_path: String,
    ignore_case: bool,
}

impl Config {
    fn build(mut args: impl Iterator<Item = String> ) -> Result<Self, &'static str> {
        args.next();
        let query = args.next().ok_or("No query path")?;
        let file_path = args.next().ok_or("No file path")?;
        let ignore_case = env::var("IGNORE_CASE").is_ok();
        println!("{ignore_case}");
        Ok(Self { query, file_path, ignore_case })
    }
}