extern crate turing_machine_rs;

use turing_machine_rs::instruction::{Move, State};
use turing_machine_rs::machines::Classic;
use turing_machine_rs::program::{Extend, Program};
use turing_machine_rs::state::Tape;
use turing_machine_rs::TuringMachine;

// For more comfortable coding, use Result<(), String>:
// `?` postfix symbol is better then `.unwrap()` postfix method call.
fn main() -> Result<(), String> {
    let alphabet = vec!['t', 'e', 's', 'n', 'i', 'c', 'e', '_'];
    let mut program = Program::new(alphabet, State(4));
    program.extend([
        (1, 't', 2, 'n', Move::Right),
        (2, 'e', 3, 'i', Move::Right),
        (3, 's', 4, 'c', Move::Right),
        (4, 't', 0, 'e', Move::None),
        // Revers
        (1, 'n', 2, 't', Move::Right),
        (2, 'i', 3, 'e', Move::Right),
        (3, 'c', 4, 's', Move::Right),
        (4, 'e', 0, 't', Move::None),
    ])?;
    let machine = Classic::new(program, '_')?;

    let test = Tape::from("test");
    let nice = machine.translate_nrm(test.clone())?;
    println!(
        "{} {}!",
        String::from_iter(nice.as_vec()),
        String::from_iter(test.as_vec())
    );
    Ok(())
}