<?php

namespace Nette\Templates;

use Nette\Forms\Form;
use Nette\String;
use InvalidStateException;


/**
 * Form macros
 *
 * @author Jan Marek
 * @license MIT
 */
class FormMacros extends \Nette\Object
{

	private static $form;



	public function __construct()
	{
		throw new InvalidStateException("Static class.");
	}



	public static function register()
	{
		LatteMacros::$defaultMacros["form"] = '<?php %Nette\Templates\FormMacros::macroBegin% ?>';
		LatteMacros::$defaultMacros["input"] = '<?php %Nette\Templates\FormMacros::macroInput% ?>';
		LatteMacros::$defaultMacros["label"] = '<?php %Nette\Templates\FormMacros::macroLabel% ?>';
		LatteMacros::$defaultMacros["errors"] = '<?php %Nette\Templates\FormMacros::macroErrors% ?>';
		LatteMacros::$defaultMacros["/form"] = '<?php Nette\Templates\FormMacros::end() ?>';
	}



	public static function macroBegin($content)
	{
		list($name, $modifiers) = self::fetchNameAndModifiers($content);
		return "\$formErrors = Nette\Templates\FormMacros::begin($name, \$control, $modifiers)->getErrors()";
	}



	public static function begin($form, $control, $modifiers = array())
	{
		if ($form instanceof Form) {
			self::$form = $form;
		} else {
			self::$form = $control[$form];
		}

		if (isset($modifiers["class"])) {
			self::$form->getElementPrototype()->class[] = $modifiers["class"];
		}

		self::$form->render("begin");

		return self::$form;
	}



	public static function end()
	{
		self::$form->render("end");
	}



	public static function macroInput($content)
	{
		list($name, $modifiers) = self::fetchNameAndModifiers($content);
		return "Nette\Templates\FormMacros::input($name, $modifiers)";
	}



	public static function input($name, $modifiers = array())
	{
		$input = self::$form[$name]->getControl();

		if (isset($modifiers["size"])) {
			$input->size($modifiers["size"]);
		}

		if (isset($modifiers["rows"])) {
			$input->rows($modifiers["rows"]);
		}

		if (isset($modifiers["cols"])) {
			$input->cols($modifiers["cols"]);
		}

		if (isset($modifiers["class"])) {
			$input->class[] = $modifiers["class"];
		}

		if (isset($modifiers["style"])) {
			$input->style($modifiers["style"]);
		}

		echo $input;
	}



	public static function macroLabel($content)
	{
		list($name, $modifiers) = self::fetchNameAndModifiers($content);
		return "Nette\Templates\FormMacros::label($name, $modifiers)";
	}



	public static function label($name, $modifiers = array())
	{
		$label = self::$form[$name]->getLabel();

		if (isset($modifiers["text"])) {
			$label->setText($modifiers["text"]);
		}

		if (isset($modifiers["class"])) {
			$label->class[] = $modifiers["class"];
		}

		if (isset($modifiers["style"])) {
			$label->style($modifiers["style"]);
		}

		echo $label;
	}



	public static function macroErrors($content) {
		return "Nette\Templates\FormMacros::errors()";
	}



	public static function errors() {
		if (self::$form->getErrors()) {
			echo "<ul class=\"errors\">\n";
			foreach (self::$form->getErrors() as $error) {
				echo "\t<li class=\"error\">". $error ."</li>\n";
			}
			echo "</ul>\n";
		}
	}



	private static function fetchNameAndModifiers($code)
	{
		$name = LatteFilter::fetchToken($code);
		$latte = new LatteMacros();
		$modifiers = $latte->formatArray($code);

		$name = String::startsWith($name, '$') ? $name : "'$name'";
		$modifiers = $modifiers ?: "array()";

		return array($name, $modifiers);
	}
}