<?php
namespace taskman;
use Exception;

function config_get_tmp_build_path(ConfigGlobals $globals, string $file) : string
{
  $name = str_replace(":", "-", str_replace("\\", "-", str_replace("/", "-", normalize_path($file))));
  $name = ltrim($name, "-");
  return normalize_path($globals->build_dir . "/$name");
}

function config_map_base_dir(
  array $base_dirs, string $file, 
  bool $normalized = false, bool $strict = true
 ) : ?string
{
  if(!$normalized)
    $file = normalize_path($file);
  foreach($base_dirs as $dir)
    if(strpos($file, $dir) === 0)
      return $dir;
  if($strict)
    throw new Exception("File '$file' is not mapped to any base dir");
  return null;
}

function config_real_path(array $base_dirs, string $rel_path, bool $strict = true) : ?string
{
  foreach($base_dirs as $dir)
    if(is_file($dir . '/' . $rel_path))
      return $dir . '/' . $rel_path;
  if($strict)
    throw new Exception("No file for relative path '$rel_path'");
  return null;
}

function config_is_file(string $filename) : bool
{
  return (strrpos($filename, '.conf.js') === (strlen($filename) - 8));
}

function config_file2id(string $conf_dir, string $filename) : int
{
  $nfilename = config_make_path($conf_dir, $filename);
  return config_crc28($nfilename);
}

function config_file2strid(string $conf_dir, string $filename) : string
{
  $strid = config_make_path($conf_dir, $filename); 
  $fname_idx = strrpos($strid, "/");
  $fname_idx = strpos($strid, ".", $fname_idx);
  $strid = substr($strid, 0, $fname_idx);
  return "@".$strid;
}

function config_make_path(string $conf_dir, string $path) : string
{
  return ltrim(str_replace(normalize_path($conf_dir, true/*nix*/), 
                           '', 
                           normalize_path($path, true/*nix*/)), 
                '/');
}

function config_crc28(string $what) : int
{
  return crc32($what) & 0xFFFFFFF;
}

function config_get_module_includes(\JSM_Module $cm) : array
{
  $includes = array();
  foreach($cm->getIncludes() as $include => $_)
  {
    //maybe we should take .php includes into account as well?
    if(str_ends_with($include, ".php"))
      continue;
    $includes[] = $include;
  }
  return $includes;
}

function config_walk_fields(object $proto, callable $callback)
{
  if(!method_exists($proto, 'CLASS_FIELDS_PROPS'))
    return;

  foreach($proto->CLASS_FIELDS_PROPS() as $field => $tokens)
  {
    $value = $proto->$field;
    $callback($proto, $field, $value, $tokens);

    if(is_object($value))
      config_walk_fields($value, $callback);
    else if(is_array($value))
    {
      foreach($value as $num => $item)
      {
        if(is_object($item))
          config_walk_fields($item, $callback);
      }
    }
  }
}

function config_includes_map_find_text_origin(array $map, string $file, string $text) : array
{
  if(!isset($map[$file]))
    return array($file);

  $tpls = $map[$file];
  $tpls[] = $file;
  $res = array();
  foreach($tpls as $tpl)
  {
    $content = ensure_read($tpl);
    $content = i18n_decode_string($content);
    if(strpos($content, $text) !== FALSE)
      $res[] = $tpl;
  }

  return $res;
}

function config2json(object $conf, int $json_flags = 0) : string
{
  $arr = $conf->export(true); 
  $arr['class'] = get_class($conf);
  unset($arr['id']); // @phpstan-ignore-line
  unset($arr['strid']); // @phpstan-ignore-line
  $json = json_encode($arr, $json_flags);
  $json = str_replace(array('\\\\', '\\n', '\/'), array('\\', "\n", '/'), $json);
  return $json;
}