// Runs wlan-lan's network in Java FILIUS (ScenarioNetwork) and records what a
// wireless connection does at run time: every frame each card saw and when
// each call started and ended.
//
//   WlanRun <scenario.json> <story> <milliseconds> <out.json>
//
// Notebooks 192.168.1.11 and .12 with wireless cards on the switch's SSID
// "schule", each joined by a wireless cable; PC 192.168.1.13 on a plain
// cable; notebook 192.168.1.14 with a wireless card on "schule" but no cable
// (as after the switch's SSID changed: Java's editor removes the cable and
// does not lay it again). The stories:
//   pingWired          .11 pings .13
//   pingWireless       .11 pings .12
//   pingWithoutCable   .11 pings .14
//   pingFromWithoutCable  .14 pings .11

import filius.software.vermittlungsschicht.IcmpPaket;

import java.util.ArrayList;
import java.util.List;

public class WlanRun {
    static final String NOTEBOOK = "00000000-0000-0000-0000-000000000601";
    static final String UNCABLED = "00000000-0000-0000-0000-000000000605";

    static ScenarioNetwork network;
    static final List<Object[]> events = new ArrayList<>();

    static synchronized void event(String what) {
        events.add(new Object[] { System.currentTimeMillis() - network.start, what });
    }

    static String icmp(IcmpPaket packet) {
        return packet == null ? "null" : "ICMP " + packet.getIcmpType() + "/" + packet.getIcmpCode() + " from " + packet.getSender();
    }

    static void ping(String from, String target) {
        String label = "sendProbe " + target;
        event(label + " called");
        try {
            event(label + " returned " + icmp(network.system(from).holeICMP().sendProbe(target, 64, 1, 1)));
        } catch (Exception e) {
            event(label + " failed " + e.getClass().getSimpleName());
        }
    }

    public static void main(String[] args) throws Exception {
        network = ScenarioNetwork.read(args[0]);
        String story = args[1];
        long end = Long.parseLong(args[2]);
        network.start();
        Thread.sleep(500);
        switch (story) {
            case "pingWired":
                ping(NOTEBOOK, "192.168.1.13");
                break;
            case "pingWireless":
                ping(NOTEBOOK, "192.168.1.12");
                break;
            case "pingWithoutCable":
                ping(NOTEBOOK, "192.168.1.14");
                break;
            case "pingFromWithoutCable":
                ping(UNCABLED, "192.168.1.11");
                break;
            default:
                throw new IllegalArgumentException("unknown story " + story);
        }
        long rest = network.start + end - System.currentTimeMillis();
        if (rest > 0) Thread.sleep(rest);

        ScenarioNetwork.Json out = new ScenarioNetwork.Json();
        out.open('{');
        network.writeFrames(out);
        synchronized (WlanRun.class) {
            out.key("events").open('[');
            for (Object[] each : events) out.open('[').number((Long) each[0]).string((String) each[1]).close(']');
            out.close(']');
        }
        out.close('}');
        network.stop();
        ScenarioNetwork.write(args[3], out);
        System.exit(0);
    }
}