<?php

namespace ERPHP;

class Hook
{
  /**
   * @var array<string, array<int, callable[]>> $actions
   */
  private static array $actions;

  /**
   * @var array<string, array<int, callable[]>> $filters
   */
  private static array $filters;

  /**
   * @param string $name
   * @param callable $function
   */
  public static function addAction(string $name, callable $function, int $priority = 10): void
  {
    self::$actions[$name][$priority][] = $function;
  }

  /**
   * @param string $name
   * @param array $parameters
   */
  public static function runAction(string $name, ...$parameters): void
  {
    $actions = self::$actions[$name] ?? [];

    foreach ($actions as $priority => $functions) {
      foreach ($functions as $function) {
        call_user_func_array($function, $parameters);
      }
    }
  }

  /**
   * @param string $name
   * @param callable $function
   */
  public static function addFilter(string $name, callable $function, int $priority = 10): void
  {
    self::$filters[$name][$priority][] = $function;
  }

  /**
   * @param string $name
   * @param mixed $value
   * @param array $parameters
   *
   * @return mixed
   */
  public static function applyFilter(string $name, mixed $value, ...$parameters): mixed
  {
    $filteredValue = $value;
    $filters = self::$filters[$name] ?? [];

    foreach ($filters as $priority => $functions) {
      foreach ($functions as $function) {
        $filteredValue = call_user_func_array($function, [$value, ...$parameters]);
      }
    }

    return $filteredValue;
  }
}