<?php
namespace nulib\output\std;

use nulib\output\IMessenger;

/**
 * Class ProxyMessenger: un proxy vers ou un plusieurs instances de IMessenger
 *
 * NB: si cette classe est instanciée sans argument, elle agit comme
 * {@link NullMessenger}: elle envoie tous les messages vers /dev/null
 */
class ProxyMessenger implements _IMessenger {
  function __construct(?IMessenger ...$msgs) {
    foreach ($msgs as $msg) {
      if ($msg !== null) $this->msgs[] = $msg;
    }
  }

  /** @var _IMessenger[] */
  protected ?array $msgs = [];

  function isEmpty(): bool {
    return !$this->msgs;
  }

  function addMessenger(IMessenger $msg): self {
    $this->msgs[] = $msg;
    return $this;
  }

  function resetParams(?array $params=null): void {
    foreach ($this->msgs as $msg) {
      $msg->resetParams($params);
    }
  }

  function clone(?array $params=null): self {
    $clone = clone $this;
    foreach ($clone->msgs as &$msg) {
      $msg = $msg->clone($params);
    }; unset($msg);
    return $clone;
  }

  function section__afterFunc(): void {
    foreach ($this->msgs as $msg) {
      if ($msg instanceof _IMessenger) {
        $msg->section__afterFunc();
      }
    }
  }

  function section($content, ?callable $func=null, ?int $level=null): void {
    foreach ($this->msgs as $msg) {
      $msg->section($content, null, $level);
    }
    if ($func !== null) {
      try {
        $func($this);
      } finally {
        $this->section__afterFunc();
      }
    }
  }

  function title__getMarks(): array {
    $marks = [];
    foreach ($this->msgs as $key => $msg) {
      if ($msg instanceof _IMessenger) {
        $marks[$key] = $msg->title__getMarks();
      }
    }
    return $marks;
  }

  function title__beforeFunc(array $marks): void {
    foreach ($this->msgs as $key => $msg) {
      if ($msg instanceof _IMessenger) {
        $msg->title__beforeFunc($marks[$key]);
      }
    }
  }

  function title__afterFunc(array $marks): void {
    foreach ($this->msgs as $key => $msg) {
      if ($msg instanceof _IMessenger) {
        $msg->title__afterFunc($marks[$key]);
      }
    }
  }

  function title($content, ?callable $func=null, ?int $level=null): void {
    $marks = $this->title__getMarks();
    foreach ($this->msgs as $msg) {
      $msg->title($content, null, $level);
    }
    if ($func !== null) {
      try {
        $this->title__beforeFunc($marks);
        $func($this);
      } finally {
        $this->title__afterFunc($marks);
      }
    }
  }

  function desc($content, ?int $level=null): void {
    foreach ($this->msgs as $msg) {
      $msg->desc($content, $level);
    }
  }

  function action__getMarks(): array {
    $marks = [];
    foreach ($this->msgs as $key => $msg) {
      if ($msg instanceof _IMessenger) {
        $marks[$key] = $msg->action__getMarks();
      }
    }
    return $marks;
  }

  function action__beforeFunc(array $marks): void {
    foreach ($this->msgs as $key => $msg) {
      if ($msg instanceof _IMessenger) {
        $msg->action__beforeFunc($marks[$key]);
      }
    }
  }

  function action__afterFunc(array $marks, $result): void {
    foreach ($this->msgs as $key => $msg) {
      if ($msg instanceof _IMessenger) {
        $msg->action__afterFunc($marks[$key], $result);
      }
    }
  }

  function action($content, ?callable $func=null, ?int $level=null): void {
    $marks = $this->action__getMarks();
    foreach ($this->msgs as $msg) {
      $msg->action($content, null, $level);
    }
    if ($func !== null) {
      try {
        $result = null;
        $this->action__beforeFunc($marks);
        $result = $func($this);
      } finally {
        $this->action__afterFunc($marks, $result);
      }
    }
  }

  function step($content, ?int $level=null): void {
    foreach ($this->msgs as $msg) {
      $msg->step($content, $level);
    }
  }

  function asuccess($content=null, ?int $overrideLevel=null): void {
    foreach ($this->msgs as $msg) {
      $msg->asuccess($content, $overrideLevel);
    }
  }

  function afailure($content=null, ?int $overrideLevel=null): void {
    foreach ($this->msgs as $msg) {
      $msg->afailure($content, $overrideLevel);
    }
  }

  function adone($content=null, ?int $overrideLevel=null): void {
    foreach ($this->msgs as $msg) {
      $msg->adone($content, $overrideLevel);
    }
  }

  function aresult($result=null, ?int $overrideLevel=null): void {
    foreach ($this->msgs as $msg) {
      $msg->aresult($result, $overrideLevel);
    }
  }

  function print($content, ?int $level=null): void {
    foreach ($this->msgs as $msg) {
      $msg->print($content, $level);
    }
  }

  function info($content, ?int $level=null): void {
    foreach ($this->msgs as $msg) {
      $msg->info($content, $level);
    }
  }

  function note($content, ?int $level=null): void {
    foreach ($this->msgs as $msg) {
      $msg->note($content, $level);
    }
  }

  function warning($content, ?int $level=null): void {
    foreach ($this->msgs as $msg) {
      $msg->warning($content, $level);
    }
  }

  function error($content, ?int $level=null): void {
    foreach ($this->msgs as $msg) {
      $msg->error($content, $level);
    }
  }

  function end(bool $all=false): void {
    foreach ($this->msgs as $msg) {
      $msg->end($all);
    }
  }
}