import { readFile } from "node:fs/promises";

export interface PasswdEntry {
  name: string;
  password: string;
  uid: number;
  gid: number;
  gecos: string;
  directory: string;
  shell: string;
}
export function parsePasswd(content: string): PasswdEntry[] {
  const lines = content.split("\n");
  return lines
    .filter((line) => line.length > 0)
    .map((line, index) => {
      const values = line.split(":");
      if (values.length !== 7)
        throw new Error(
          `La línea ${index + 1} no tiene la cantidad correcta de partes`
        );
      const entry: PasswdEntry = {
        name: values[0],
        password: values[1],
        uid: parseInt(values[2]),
        gid: parseInt(values[3]),
        gecos: values[4],
        directory: values[5],
        shell: values[6],
      };
      return entry;
    });
}
export async function readPasswd(path: string): Promise<PasswdEntry[]> {
  const content = await readFile(path, "utf-8");
  return parsePasswd(content);
}