extern crate serde_json;

use std::collections::HashMap;
use std::io::Write;

use crate::mass::{Mass, MassType};
use crate::server::connection::ServerConnection;

impl ServerConnection {
    pub fn server_navigation(&mut self, masses: &mut HashMap<String, Mass>) {
        let mut ship = masses.remove(&self.name).unwrap();
        let ship_clone = ship.clone();

        if let MassType::Ship {
            ref mut navigation, ..
        } = ship.mass_type
        {
            navigation.verify_target(ship.position.clone(), &masses);
            let mut within_range: HashMap<&String, &Mass> = masses
                .iter()
                .filter(|&(_, mass)| {
                    ship_clone.position.distance_from(mass.position.clone()) < navigation.range
                })
                .collect();
            within_range.insert(&self.name, &ship_clone);

            if self.open {
                let send = serde_json::to_string(&within_range).unwrap() + "\n";
                self.open = self.stream.write(send.as_bytes()).is_ok();

                let recv = self.receive();
                navigation.give_recv(recv);
            }
        }

        masses.insert(self.name.clone(), ship);
    }
}