<?php
namespace taskman;
use Exception;

require_once(__DIR__ . '/task.inc.php');
require_once(__DIR__ . '/scan.inc.php');
require_once(__DIR__ . '/cache.inc.php');
require_once(__DIR__ . '/pack.inc.php');
require_once(__DIR__ . '/util.inc.php');
require_once(__DIR__ . '/msgpack.inc.php');

class ConfigGlobals
{
  public array $base_dirs = array();
  public ?string $worker_init_fn = null;
  public string $base_class = '\ConfBase';
  public string $build_dir;

  function __construct(array $base_dirs, string $build_dir, ?string $worker_init_fn = null)
  {
    $this->base_dirs = array_map(fn($path) => normalize_path($path), $base_dirs);
    $this->build_dir = $build_dir;
    $this->worker_init_fn = $worker_init_fn;
  }

  function initWorker(bool $is_master_proc)
  {
    $GLOBALS['CONFIG_GLOBALS'] = $this;

    if($this->worker_init_fn !== null)
    {
      $fn = $this->worker_init_fn;
      $fn($is_master_proc);
    }
  }
}

function config_log($msg)
{
  echo "[CFG] $msg\n";
}

function config_get_cache_path(ConfigGlobals $globals, string $file) : string
{
  return config_get_tmp_build_path($globals, $file . '.cacheb');
} 

function config_get_cache_payload_path(ConfigGlobals $globals, string $file) : string
{
  return config_get_tmp_build_path($globals, $file . '.pdata');
} 

function config_load(ConfigGlobals $globals, string $conf_path, ?string $conf_dir = null) : object
{
  $conf_dir ??= config_map_base_dir($globals->base_dirs, $conf_path);

  list($conf_id, $_) = config_ensure_header($conf_dir, $conf_path);
  if(!$conf_id)
    throw new Exception("Bad conf id: {$conf_id}");

  $pres = config_parse(array($conf_dir), $conf_path);
  if($pres->error !== 0)
    throw new Exception("Error({$pres->error}) while loading JSON from {$conf_path}:\n" . $pres->error_descr);

  return config_load_from_kv_array($globals, $conf_dir, $conf_path, $pres->parsed_arr, $conf_id); 
}

function config_load_from_kv_array(
  ConfigGlobals $globals, string $conf_dir, string $file, 
  array $arr, ?int $id = null) : object
{
  if(!isset($arr['class']) || !isset($arr['class'][0]))
    throw new Exception("Class is not set in file '$file'.");

  $id ??= config_file2id($conf_dir, $file);  

  $cnf = null;
  try
  {
    list($klass, $class_id, $norm_arr) = config_apply_class_normalization($arr);

    if(!class_exists($klass))
      throw new Exception("No such class '$klass'");
    $cnf = new $klass;   
    if(!is_a($cnf, $globals->base_class))
      throw new Exception("'$klass' is not subclass of '".ltrim($globals->base_class, '\\')."'");

    $cnf->import($norm_arr);
  }
  catch(Exception $e)
  {
    throw new Exception($e->getMessage() . " in file '{$file}'"/* . $e->getTraceAsString()*/);
  }
  
  $cnf->id = $id;
  $cnf->strid = config_file2strid($conf_dir, $file);

  return $cnf;
}

function config_bench_load(ConfigGlobals $globals, string $file)
{
  $base_dir = config_map_base_dir($globals->base_dirs, $file);

  list($conf_id, $_) = config_ensure_header($base_dir, $file);
  if(!$conf_id)
    throw new Exception("Bad conf id: {$conf_id}");
  $t = microtime(true);
  $parse_res = config_parse($globals->base_dirs, $file);
  if($parse_res->error !== 0)
    throw new Exception("Error({$parse_res->error}) while loading JSON from {$file}:\n" . $parse_res->error_descr);
  config_log("Parse: " . (microtime(true) - $t));
  $t = microtime(true);
  $config = config_load_from_kv_array($globals, $base_dir, $file, $parse_res->parsed_arr, $conf_id); 
  config_log("Load: " . (microtime(true) - $t));
}