import { readFileSync } from 'node:fs';

export function getDepsCount(files: string[] = []): Record<string, Record<string, string[]>> {
  const map: Record<string, JSON> = {};
  const depsCounter: Record<string, Record<string, string[]>> = {};

  for (const file of files) {
    const content = JSON.parse(readFileSync(file).toString('utf-8'));
    map[file] = content;

    const deps = content.dependencies ?? {};
    const devDeps = content.devDependencies ?? {};

    const merged = { ...deps, ...devDeps };

    Object.keys(merged)
      .sort()
      .map((pkg) => {
        const pkgVersion = merged[pkg];
        if (!depsCounter[pkg]) {
          depsCounter[pkg] = { [pkgVersion]: [file] };
          return;
        }
        if (!depsCounter[pkg][pkgVersion]) {
          depsCounter[pkg][pkgVersion] = [file];
          return;
        }
        depsCounter[pkg][pkgVersion] = [...depsCounter[pkg][pkgVersion], file];
      });
  }
  return depsCounter;
}