eliza 2.0.1

//! A rust implementation of ELIZA - a natural language processing program developed by Joseph
//! Weizenbaum in 1966.
//!
//! ## Starting ELIZA
//!
//! Assuming you have installed from source, you could run ELIZA like so, supplying the famous
//! 'DOCOTOR' program as the script:
//!
//! ```md,no_run
//! user@foo(eliza) ~> cargo run scripts/doctor.json
//! ...
//! ```
//!
//! ## Stopping ELIZA
//!
//! To stop ELIZA, simply supply the `/quit` command:
//!
//! ```md,no_run
//! ...
//! Is something troubling you?
//!
//! > /quit
//!
//! Goodbye. I look forward to our next session.
//! user@foo(eliza) ~>
//! ```
//!
#[macro_use]
extern crate log;

use eliza::Eliza;
use std::io::Write;
use std::{env, io, thread, time};

fn main() {
    env_logger::init();

    let args: Vec<String> = env::args().collect();
    if args.len() < 2 {
        error!("Usage of eliza is: ./eliza [SCRIPT]");
        panic!("Not enough arguments");
    }

    let mut eliza = Eliza::from_file(&args[1]).expect("Eliza failed to load");
    println!("\nEnter '/quit' to leave the session.\n");
    println!("{}\n", eliza.greet()); //eliza greets the user

    loop {
        print!("> ");
        io::stdout().flush().expect("Failed to read line.");

        let mut input = String::new();
        io::stdin()
            .read_line(&mut input)
            .expect("Failed to read line.");

        match input.as_ref() {
            "/quit\n" => break,
            //Based on the rules in the script, eliza responds to the given input
            _ => {
                //Insert short delay to make eliza seem like she's thinking
                thread::sleep(time::Duration::from_millis(300));
                println!("{}\n", eliza.respond(&input));
            }
        }
    }

    println!("\n{}", eliza.farewell()); //eliza farewells the user
}