use wasm_bindgen::prelude::*;

// lifted from the `console_log` example
#[wasm_bindgen]
extern "C" {
    #[wasm_bindgen(js_namespace = console)]
    fn log(s: &str);
}

#[wasm_bindgen]
#[derive(Debug)]
pub struct Counter {
    key: char,
    count: i32,
}

#[wasm_bindgen]
impl Counter {
    pub fn new(key: char, count: i32) -> Counter {
        log(&format!("Counter::new({key}, {count})"));
        Counter { key, count }
    }

    pub fn key(&self) -> char {
        log("Counter.key()");
        self.key
    }

    pub fn count(&self) -> i32 {
        log("Counter.count");
        self.count
    }

    pub fn increment(&mut self) {
        log("Counter.increment");
        self.count += 1;
    }

    pub fn update_key(&mut self, key: char) {
        self.key = key;
    }
}
