use godot::{
    classes::{HBoxContainer, IHBoxContainer, Label, Slider},
    prelude::*,
};

#[derive(GodotClass)]
#[class(base=HBoxContainer, init, tool)]
pub struct SliderContainer {
    #[export]
    label: Option<Gd<Label>>,
    #[export]
    slider: Option<Gd<Slider>>,
    #[export]
    pub value: f64,
    #[export]
    pub min: f64,
    #[export]
    pub max: f64,

    last_value: f64,

    base: Base<HBoxContainer>,
}

#[godot_api]
impl IHBoxContainer for SliderContainer {
    fn ready(&mut self) {}

    fn process(&mut self, _delta: f64) {
        if let Some(slider) = &mut self.slider {
            slider.set_min(self.min);
            slider.set_max(self.max);
            if self.last_value != self.value {
                slider.set_value(self.value);
            }
            self.value = slider.get_value();
            if self.last_value != self.value {
                let value = self.value;
                self.signals().on_change().emit(value);
            }
            self.last_value = self.value;
        }

        if let Some(label) = &mut self.label
            && let Some(slider) = &self.slider
        {
            label.set_text(&format!("{}", slider.get_value()));
        }
    }
}

#[godot_api]
impl SliderContainer {
    #[signal]
    pub fn on_change(value: f64);
}