lmserve

#!/usr/bin/env -S java --enable-native-access=ALL-UNNAMED --source 25 -cp ./zbo/lightmetal.jar:./lightmetal.jar

import lm.catalog.boundary.ModelCatalog;
import lm.configuration.control.ZCfg;
import lm.http.boundary.HttpAPI;
import lm.version.control.Version;

String name = MethodHandles.lookup().lookupClass().getName();
String version = "2026-06-10.1";

void main(String... args) throws Exception {
    IO.println(name + " " + version + " (lightmetal " + Version.VALUE + ")");
    if (args.length > 0 && args[0].equals("-help")) {
        IO.println("""
                Usage: %s [model-fragment] [-port <n>]
                  -help     Show this help
                  -version  Show version

                Reads model and port from ~/.lightmetal/app.properties when not given.
                """.formatted(name));
        return;
    }
    if (args.length > 0 && args[0].equals("-version")) {
        return;
    }
    ZCfg.load("lightmetal");

    String fragment = null;
    var port = ZCfg.integer("port", 8080);
    for (var i = 0; i < args.length; i++) {
        if (args[i].equals("-port") && i + 1 < args.length) {
            port = Integer.parseInt(args[++i]);
        } else if (!args[i].startsWith("-")) {
            fragment = args[i];
        }
    }

    var fileName = fragment != null ? matchModel(fragment) : ZCfg.string("model");
    if (fileName == null) {
        System.err.println(name + ": no model configured (set model=<file> in ~/.lightmetal/app.properties)");
        System.exit(1);
    }
    var modelPath = ModelCatalog.resolve(fileName);
    if (!Files.exists(modelPath)) {
        System.err.println(name + ": model not found at " + modelPath);
        System.exit(1);
    }
    HttpAPI.serve(modelPath, port);
}

String matchModel(String fragment) {
    var matches = ModelCatalog.search(fragment);
    if (matches.size() == 1) {
        return matches.getFirst();
    }
    if (matches.isEmpty()) {
        System.err.println(name + ": no model matches \"" + fragment + "\"");
    } else {
        System.err.println(name + ": " + matches.size() + " models match \"" + fragment + "\":");
        matches.forEach(m -> System.err.println("  " + m));
    }
    System.exit(1);
    return null;
}