use itertools::Itertools;

use crate::spatial::{Point, RightAngledShape};

pub fn day9_part1(input: &str) -> String {
    let points = parse(input);

    let pair = points
        .iter()
        .combinations(2)
        .map(|pair| (pair[0], pair[1]))
        .max_by_key(|(l, r)| l.rectangular_area(r))
        .unwrap();

    pair.0.rectangular_area(pair.1).to_string()
}
pub fn day9_part2(input: &str) -> String {
    let points = parse(input);

    let red_or_green_tiles_shape = RightAngledShape::new(&points);

    let pair = points
        .into_iter()
        .combinations(2)
        .map(|pair| (pair[0], pair[1]))
        .filter(|rect| {
            red_or_green_tiles_shape.contains_rect(*rect)
        })
        .max_by_key(|(l, r)| l.rectangular_area(r))
        .unwrap();

    dbg!(&pair);
    pair.0.rectangular_area(&pair.1).to_string()
}

fn parse(input: &str) -> Vec<Point> {
    input
        .lines()
        .map(|line| line.parse::<Point>().unwrap())
        .map(|pt| Point {
            row: pt.col,
            col: pt.row,
        })
        .collect()
}