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
}