mod coordinate;
pub use coordinate::Coordinate;

mod level;
pub use level::{First, Fourth, Level, Second, Third};

mod spot;
pub use spot::Spot;

use std::marker::PhantomData;

#[derive(Clone, Debug)]
pub struct GridCell<A: Level> {
    pub code: u64,
    pub west_longitude: f64,
    pub south_latitude: f64,
    phantom: PhantomData<A>,
}

#[cfg(test)]
mod tests {
    use crate::{Coordinate, Spot};

    #[test]
    fn first_cell() {
        let actual = new_spot1().as_first_cell().code;
        let expected = 5339;
        assert_eq!(actual, expected);
    }

    #[test]
    fn second_cell() {
        let actual = new_spot1().as_second_cell().code;
        let expected = 533945;
        assert_eq!(actual, expected);
    }

    #[test]
    fn third_cell() {
        let actual = new_spot1().as_third_cell().code;
        let expected = 53394518;
        assert_eq!(actual, expected);
    }

    #[test]
    fn fourth_cell() {
        let actual = new_spot1().as_fourth_cell().code;
        let expected = 533945184;
        assert_eq!(actual, expected);
    }

    fn new_spot1() -> Spot {
        Spot::new(Coordinate {
            longitude: 139.733231,
            latitude: 35.680916,
        })
    }
}