<?php
namespace taskman;
use Exception;

class ConfigScanResult
{
  /*var array<string, string[]>*/
  public array $base_dir2files = array();

  function isEmpty() : bool
  {
    return empty($this->base_dir2files);
  }

  function count() : int
  {
    $total = 0;
    foreach($this->base_dir2files as $base_dir => $files)
      $total += count($files);
    return $total;
  }

  function apply(callable $fn)
  {
    foreach($this->base_dir2files as $base_dir => $files)
      $this->base_dir2files[$base_dir] = $fn($base_dir, $files);
  }

  function filter(callable $filter)
  {
    foreach($this->base_dir2files as $base_dir => $files)
      $this->base_dir2files[$base_dir] = array_filter($files, $filter);
  }

  function forEachFile(callable $fn)
  {
    foreach($this->base_dir2files as $base_dir => $files)
    {
      foreach($files as $file)
        $fn($base_dir, $file);
    }
  }

  function add(string $base_dir, string $file)
  {
    if(!isset($this->base_dir2files[$base_dir]))
      $this->base_dir2files[$base_dir] = array();

    $this->base_dir2files[$base_dir][] = $file;
  }

  //returns [[base_dir, file1], [base_dir, file2], ...]
  function getFlatArray() : array
  {
    $flat = [];
    foreach($this->base_dir2files as $base_dir => $files)
    {
      foreach($files as $file)
        $flat[] = [$base_dir, $file];
    }
    return $flat;
  }

  function getAllFiles() : array
  {
    $all_files = [];
    foreach($this->base_dir2files as $base_dir => $files)
      $all_files = array_merge($all_files, $files);

    return $all_files;
  }
}

function config_scan_files(
  array $base_dirs, 
  string $ext_filter = '.conf.js', 
  bool $verbose = false
  ) : ConfigScanResult
{
  $t = microtime(true);

  $result = new ConfigScanResult();

  foreach($base_dirs as $base_dir)
  {
    $result->base_dir2files[$base_dir] = 
      scan_files_rec(array($base_dir), array($ext_filter));
  }

  if($verbose)
    config_log("File scan: {$result->count()}, done " . round(microtime(true) - $t,2) . " sec.");

  return $result;
}