use std::collections::HashSet;

use crate::crossings::Crossing;

pub fn print_report(crossings: &[Crossing]) {
    eprintln!();
    eprintln!("County visits");
    eprintln!("=============");

    if crossings.is_empty() {
        eprintln!("No county crossings found.");
        return;
    }

    let mut visits = Vec::new();

    visits.push(crossings[0].from.clone());

    for crossing in crossings {
        visits.push(crossing.to.clone());
    }

    for (index, county) in visits.iter().enumerate() {
        eprintln!("{:3}  {} [{}]", index + 1, county.name, county.id,);
    }

    let unique: HashSet<String> = visits.iter().map(|county| county.id.clone()).collect();

    eprintln!();
    eprintln!("Visits:          {}", visits.len());

    eprintln!("Unique counties: {}", unique.len());

    eprintln!();
    eprintln!("Border crossings");
    eprintln!("=================");

    for (index, crossing) in crossings.iter().enumerate() {
        eprintln!(
            "{:3}  {} -> {}",
            index + 1,
            crossing.from.name,
            crossing.to.name,
        );
    }
}