use crate::domain::*;

use bevy::prelude::*;

/// Запланировать установку скорости движения [Velocity] при следующем событии [GridBarier]
pub fn schedule_set_velocity(tail: Entity) -> impl Fn(On<GridBarier>, Commands, Query<(&mut Velocity, &Transform)>) {
    move |event: On<GridBarier>, mut commands: Commands, mut query: Query<(&mut Velocity, &Transform)>| {
        if let Ok((mut velocity, transform)) = query.get_mut(tail) {
            let position = Position::from(transform);
            if event.position != position {
                velocity.0 = SNAKE_VELOCITY as f32;
                commands.entity(event.observer()).despawn();
            }
        }
    }
}