import fs from "node:fs";
import child_process from "node:child_process";

type Properties = {
    "jar-file": string,
    "terminal"?: boolean,
    "minimum-mem"?: string,
    "maximum-mem"?: string
}

let jvm_properties: Properties = JSON.parse(fs.readFileSync("jvm-properties.json", { encoding: "utf8" }));

if (jvm_properties["jar-file"] === undefined) throw new Error("`jar-file` is a required option.");

if (jvm_properties["terminal"] === undefined) jvm_properties["terminal"] = false;
if (jvm_properties["minimum-mem"] === undefined) jvm_properties["minimum-mem"] = "1G";
if (jvm_properties["maximum-mem"] === undefined) jvm_properties["maximum-mem"] = "4G";

let subprocess = child_process.spawn(jvm_properties["terminal"] ? "java" : "javaw",
    [`-Xms${ jvm_properties["minimum-mem"] }`,
     `-Xmx${ jvm_properties["maximum-mem"] }`,
     "-jar", jvm_properties["jar-file"]],
    { stdio: "ignore", detached: true, windowsHide: !jvm_properties["terminal"] }
);

subprocess.unref();