//
// Restaurant lib for demontrating rust modules.
//
// Georg Hopp <georg@steffers.org>
//
// Copyright © 2019 Georg Hopp
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

mod front_of_house {
    pub mod hosting {
        pub fn add_to_waitlist() {}
        fn seat_at_table() {}
    }

    mod serving {
        fn take_order() {}
        fn take_payment() {}

    }
}

fn serve_order() {}

mod back_of_house {
    pub struct Breakfast {
        pub toast: String,
        seasonal_fruit: String,
    }

    impl Breakfast {
        pub fn summer(toast: &str) -> Breakfast {
            Breakfast {
                toast: String::from(toast),
                seasonal_fruit: String::from("peaches"),
            }
        }
    }

    pub enum Appetizer {
        Soup,
        Salad,
    }

    fn fix_incorrect_order() {
        cook_order();
        super::serve_order();
    }

    fn cook_order() {}
}

// Either absolute:
// use crate::front_of_house::hosting;
// or relaive:
use front_of_house::hosting;
// we can also provide new names...
use crate::front_of_house::hosting as host;
// Public definitions braught into scope with use are
// private in this scope except we use «pub use»
pub use front_of_house::hosting as pubhost;

pub fn eat_at_restaurant() {
    // Absolute path
    crate::front_of_house::hosting::add_to_waitlist();

    // Relative path
    front_of_house::hosting::add_to_waitlist();

    // With use'd path
    hosting::add_to_waitlist();

    // With renamed used path
    host::add_to_waitlist();

    pubhost::add_to_waitlist();

    // Order a breakfast in the summer with Rye toast
    let mut meal = back_of_house::Breakfast::summer("Rye");

    // Change our mind about what bread we'd like
    meal.toast = String::from("Wheat");

    println!("I'd like {} toast please", meal.toast);

    // The next line won't compile if we uncomment it; we're not allowed
    // to see or modify the seasonal fruit that comes with the meal
    // meal.seasonal_fruit = String::from("blueberries");

    let order1 = back_of_house::Appetizer::Soup;
    let order2 = back_of_house::Appetizer::Salad;
}