// Runs FILIUS's own reading of /dns/hosts (DNSServer.holeResourceRecords)
// on every case of a list and writes the records Java keeps — the reference
// for packages/fls/src/dnsHosts.ts. One case per line: a whole hosts file,
// ASCII with Java-style unicode escapes (backslash, u, four hex digits), so
// line breaks and odd spaces survive editors and hooks.
//
// Usage: java -cp filius.jar:lib/*:classes DnsHostsCases <cases txt> <output json>

import filius.hardware.knoten.Rechner;
import filius.software.dns.DNSServer;
import filius.software.dns.ResourceRecord;
import filius.software.system.Datei;
import filius.software.system.Dateisystem;
import filius.software.system.InternetKnotenBetriebssystem;

import java.io.FileOutputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class DnsHostsCases {

    public static void main(String[] args) throws Exception {
        List<Object> result = new ArrayList<>();
        for (String line : Files.readAllLines(Path.of(args[0]), StandardCharsets.US_ASCII)) {
            InternetKnotenBetriebssystem system = (InternetKnotenBetriebssystem) new Rechner().getSystemSoftware();
            Dateisystem fileSystem = system.getDateisystem();
            fileSystem.erstelleVerzeichnis(fileSystem.getRoot(), "dns");
            Datei hosts = new Datei();
            hosts.setName("hosts");
            hosts.setDateiInhalt(IpCheckCases.unescape(line));
            fileSystem.speicherDatei(fileSystem.holeRootPfad() + Dateisystem.FILE_SEPARATOR + "dns", hosts);
            DNSServer server = new DNSServer();
            server.setSystemSoftware(system);
            List<Object> records = new ArrayList<>();
            for (ResourceRecord record : server.holeResourceRecords()) {
                records.add(Arrays.asList(record.getDomainname(), record.getType(), record.getTtl(), record.getRdata()));
            }
            result.add(Arrays.asList(line, records));
        }
        try (FileOutputStream out = new FileOutputStream(args[1])) {
            out.write((FlsOracle.Json.write(result, "") + "\n").getBytes(StandardCharsets.UTF_8));
        }
        System.out.println("dns hosts cases: " + result.size());
        System.exit(0);
    }
}