/* eslint-disable -- This file is vendored from https://github.com/getsentry/sentry-javascript/blob/9.4.0/packages/node/src/utils/module.ts */

import { posix, sep } from "node:path";
import { dirname } from "@sentry/core";

/** normalizes Windows paths */
function normalizeWindowsPath(path: string): string {
  return path
    .replace(/^[A-Z]:/, "") // remove Windows-style prefix
    .replace(/\\/g, "/"); // replace all `\` instances with `/`
}

/** Creates a function that gets the module name from a filename */
export function createGetModuleFromFilename(
  basePath: string = process.argv[1] ? dirname(process.argv[1]) : process.cwd(),
  isWindows: boolean = sep === "\\",
): (filename: string | undefined) => string | undefined {
  const normalizedBase = isWindows ? normalizeWindowsPath(basePath) : basePath;

  return (filename: string | undefined) => {
    if (!filename) {
      return;
    }

    const normalizedFilename = isWindows
      ? normalizeWindowsPath(filename)
      : filename;

     
    let { dir, base: file, ext } = posix.parse(normalizedFilename);

    if (ext === ".js" || ext === ".mjs" || ext === ".cjs") {
      file = file.slice(0, ext.length * -1);
    }

    // The file name might be URI-encoded which we want to decode to
    // the original file name.
    const decodedFile = decodeURIComponent(file);

    if (!dir) {
      // No dirname whatsoever
      dir = ".";
    }

    const n = dir.lastIndexOf("/node_modules");
    if (n > -1) {
      return `${dir.slice(n + 14).replace(/\//g, ".")}:${decodedFile}`;
    }

    // Let's see if it's a part of the main module
    // To be a part of main module, it has to share the same base
    if (dir.startsWith(normalizedBase)) {
      const moduleName = dir
        .slice(normalizedBase.length + 1)
        .replace(/\//g, ".");
      return moduleName ? `${moduleName}:${decodedFile}` : decodedFile;
    }

    return decodedFile;
  };
}