<?php
/*************************************************************
# 076 License

Copyright (c) テクニカル諏訪子

Permission is hereby granted to any person obtaining a copy of the software
Little Beast (the "Software") to use, modify, merge, copy, publish, distribute,
sublicense, and/or sell copies of the Software, subject to the following conditions:

    1. **Origin Attribution**:
       - You must not misrepresent the origin of the Software; you must not claim
         you created the original Software.
       - If the Software is used in a product, you must either:
         a. Provide clear attribution in the product's documentation, user interface,
            or other visible areas, **OR**
         b. Pay the original developers a fee they specify in writing.
    2. **Usage Restriction**:
       - The Software, or any derivative works, dependencies, or libraries
         incorporating it, must not be used for censorship or to suppress freedom of
         speech, expression, or creativity. Prohibited uses include, but are not
         limited to:
         - Censorship of so-called "hate speech", visuals, non-mainstream opinions,
           ideas, or objective reality.
         - Tools or systems designed to restrict access to information or
           artistic works.
    3. **Notice Preservation**:
       - This license and the above copyright notice must remain intact in all copies
         of the source code.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
namespace Std\Test\Helper;

/**
 * テスト用の偽物のサーバー（別のPHPプロセスで動かす）
 *
 * http-server.php（HTTP）とsmtp-server.php（SMTP）を127.0.0.1の空いているポートで起動する。
 * ネットワークに繋がっていなくてもCurl・Openprovider・Mailerをテスト出来る様に。
 *
 * 例：
 *   $srv = MockServer::start('http-server.php');
 *   $curl = new Curl($srv->url('/echo'));
 *   $srv->stop();
 */
class MockServer {
  public int $port;
  /** @var resource */
  private $proc;
  private array $pipes = [];

  private function __construct() {}

  /**
   * サーバーを起動する
   *
   * @param string $script  このディレクトリのスクリプト名
   * @param array $args  スクリプトに渡す追加の引数
   * @return self|null  起動出来なかった場合はnull（proc_openが無効等）
   */
  public static function start(string $script, array $args = []): ?self {
    if (!function_exists('proc_open')) return null;

    // 空いているポートを探す
    $probe = @stream_socket_server('tcp://127.0.0.1:0', $errno, $errstr);
    if (!$probe) return null;
    $port = (int)substr(strrchr(stream_socket_get_name($probe, false), ':'), 1);
    fclose($probe);

    $cmd = array_merge([PHP_BINARY, __DIR__.'/'.$script, (string)$port], array_map('strval', $args));
    $spec = [0 => ['pipe', 'r'], 1 => ['pipe', 'w'], 2 => ['pipe', 'w']];
    $proc = @proc_open($cmd, $spec, $pipes);
    if (!is_resource($proc)) return null;

    // 「ready」が出力されるまで待つ（起動に失敗したらfalse）
    $line = fgets($pipes[1]);
    if (trim((string)$line) !== 'ready') {
      proc_terminate($proc);
      proc_close($proc);
      return null;
    }

    $srv = new self();
    $srv->port = $port;
    $srv->proc = $proc;
    $srv->pipes = $pipes;
    return $srv;
  }

  /**
   * このサーバーのURL
   *
   * @param string $path  パス
   * @param string $host  127.0.0.1又はlocalhost（別のオリジンとして扱う為）
   * @return string
   */
  public function url(string $path = '/', string $host = '127.0.0.1'): string {
    return "http://{$host}:{$this->port}{$path}";
  }

  /**
   * サーバーを止める
   *
   * @return void
   */
  public function stop(): void {
    if (!is_resource($this->proc)) return;
    // 終了のリクエストを送る（Windowsではproc_terminateで子プロセスが残る事がある）
    $c = @stream_socket_client("tcp://127.0.0.1:{$this->port}", $errno, $errstr, 1);
    if ($c) {
      fwrite($c, "QUIT /__quit HTTP/1.0\r\n\r\n");
      fclose($c);
    }
    foreach ($this->pipes as $p) if (is_resource($p)) fclose($p);
    proc_terminate($this->proc);
    proc_close($this->proc);
  }

  public function __destruct() {
    $this->stop();
  }
}