import { exists } from "jsr:@std/fs";

/**
 * Return the path to Eve's configuration directory.
 *
 * The configuration directory is resolved in the following order:
 *   1. The value of the `XDG_CONFIG_HOME` environment variable.
 *   2. The value of the `HOME` environment variable, with `.config` appended.
 *
 * If the resolved path does not exist, create it.
 */
export async function getEveConfigHome(): Promise<string> {
  const xdgConfigHome = Deno.env.get("XDG_CONFIG_HOME") ??
    `${Deno.env.get("HOME")}/.config`;
  const storagePath = `${xdgConfigHome}/arx/Eve`;
  if (!(await exists(storagePath))) {
    await Deno.mkdir(storagePath, { recursive: true });
  }
  return storagePath;
}

/**
 * Return the path to the file in Eve's configuration directory.
 *
 * @param file The name of the file to return the path for.
 * @returns The path to the file in Eve's configuration directory.
 */
export async function getEveFilePath(file: string): Promise<string> {
  const storagePath = await getEveConfigHome();
  return `${storagePath}/${file}`;
}