import { ObjectFreeze } from "ext:core/primordials";
import { onRuntimeStart } from "ext:core/bootstrap";
import {
  op_process_cwd,
  op_runtime_info,
  op_sys_hostname,
  op_sys_loadavg,
  op_sys_os_release,
  op_sys_uptime,
} from "ext:core/ops";
import { result } from "ext:file/errors.js";

// Live initialization runs before guest modules, including after snapshot restore.
export const process: {
  pid: number;
  args: readonly string[];
  cwd(): string;
  hostname(): string;
  osRelease(): string;
  uptime(): number;
  loadavg(): [number, number, number];
} = {
  pid: undefined!,
  args: undefined!,
  cwd() {
    return result(op_process_cwd());
  },
  hostname() {
    return result(op_sys_hostname());
  },
  osRelease() {
    return result(op_sys_os_release());
  },
  uptime() {
    return result(op_sys_uptime());
  },
  loadavg() {
    return result(op_sys_loadavg());
  },
};

export const runtime: {
  os: "linux" | "macos" | "windows";
  arch: "x86_64" | "aarch64";
  version: string;
  v8: string;
} = {
  os: undefined!,
  arch: undefined!,
  version: undefined!,
  v8: undefined!,
};

onRuntimeStart(() => {
  const info = op_runtime_info();
  process.pid = info[0];
  process.args = ObjectFreeze(info[5]);
  runtime.os = info[1];
  runtime.arch = info[2];
  runtime.version = info[3];
  runtime.v8 = info[4];
  ObjectFreeze(process);
  ObjectFreeze(runtime);
});