sf_minigrep 0.1.0

use std::env;
use std::fs;
use std::process;
use std::error::Error;
use sf_minigrep::search;
use sf_minigrep::search_case_insensitive;

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

    if let Err(e) = run(config){
        eprintln!("Application error: {e}");
        process::exit(1);
    }
}
///This is what runs the logic
fn run(config: Config) -> Result<(), Box<dyn Error>> {
    let contents = fs::read_to_string(config.file_path)?;
    

    let result = if config.ignore_case {
        search_case_insensitive(&config.querry, &contents)
    } else {
        search(& config.querry, &contents)
    };

    for line in result{
        println!("{line}");
    }

    Ok(())
}

struct Config{
    pub querry:String,
    pub file_path:String,
    pub ignore_case:bool,
}

impl Config {
    fn build( 
        mut args: impl Iterator<Item = String>
    ) -> Result<Config, &'static str> {
        args.next();

        let querry = match args.next(){
            Some(arg) => arg,
            None => return Err("Didnt get a querry word"),
        };

        let file_path = match args.next() {
            Some(arg) => arg,
            None => return Err("Didn't get a file path")
        };
        
        let ignore_case = env::var("IGNORE_CASE").is_ok();

        Ok(Config {
            querry,
            file_path,
            ignore_case,
        })
    }

}