import path from "node:path";
import fs from "node:fs";
const fsPromises = fs.promises;
import { getAllFoldersUntilFolder } from "../fs-util/index.js";
export const getFolderPath = async (fileOrFolderPath: string) => {
  if (!fs.existsSync(fileOrFolderPath)) {
    return;
  }
  const stat = await fsPromises.stat(fileOrFolderPath);
  if (stat.isDirectory()) return fileOrFolderPath;
  return path.parse(fileOrFolderPath).dir;
};
export const getCommonAncestorMultiple = async (paths: string[]) => {
  if (paths.length <= 1) {
    console.log("not enough paths, minimum 2");
    return;
  }
  const firstPath = paths[0];
  const allFolders = getAllFoldersUntilFolder(firstPath);

  const uncommonIndex = allFolders.findIndex((pathUntilFolder) => {
    // NB: find a path that doesn't start with a chunk
    const isUncommon = !!paths.find(
      (p) =>
        !p.startsWith(pathUntilFolder === "/" ? "/" : `${pathUntilFolder}/`),
    );
    return isUncommon;
  });

  console.log({ paths, firstPath, allFolders, uncommonIndex });
  if (uncommonIndex === -1) {
    return getFolderPath(firstPath);
  }

  const commonAncestor = await getFolderPath(allFolders[uncommonIndex - 1]);
  return commonAncestor;
};