<?php

class Qs_Form_Decorator_Label extends Zend_Form_Decorator_Label
{
    protected $_tagOptions = [];
    protected $_label;

    public function setLabel($label)
    {
        $this->_label = $label;
    }

    public function setOptions(array $options)
    {
        if (isset($options['options'])) {
            unset($options['options']);
        }
        foreach ($options as $key => $value) {
            $method = 'set' . ucfirst($key);
            if (method_exists($this, $method)) {
                $this->$method($value);
            } else {
                $this->_options[$key] = $value;
            }
        }
        return $this;
    }

    public function setTagOptions(array $options)
    {
        $this->_tagOptions = $options;
        return $this;
    }

    public function getTagOptions()
    {
        return $this->_tagOptions;
    }

    public function setTagOption($name, $value)
    {
        $this->_tagOptions[$name] = $value;
        return $this;
    }

    public function getTagOption($name)
    {
        if (array_key_exists($name, $this->_tagOptions)) {
            return $this->_tagOptions[$name];
        }
        return null;
    }

    public function getLabel()
    {
        if (null === $this->_label) {
            $this->_label = parent::getLabel();
        }
        return $this->_label;
    }

    public function render($content)
    {
        $element = $this->getElement();
        $view = $element->getView();
        if (null === $view) {
            return $content;
        }

        $label = $this->getLabel();
        $separator = $this->getSeparator();
        $placement = $this->getPlacement();
        $tag = $this->getTag();
        $id = $this->getId();
        $class = $this->getClass();
        $options = $this->getOptions();

        if ($element instanceof Zend_Form_Element_Captcha) {
            $options['id'] = $element->getId() . '-input';
        }

        if (empty($label) && empty($tag)) {
            return $content;
        }

        if (!empty($label)) {
            $options['class'] = $class;
            $label = $view->formLabel($element->getFullyQualifiedName(), trim($label), $options);
        } else {
            $label = '&nbsp;';
        }

        if (null !== $tag) {
            $decorator = new Zend_Form_Decorator_HtmlTag();
            $options = ['tag' => $tag, 'id' => $id . '-label'];
            $options = array_merge($options, $this->getTagOptions());
            $decorator->setOptions($options);

            $label = $decorator->render($label);
        }

        switch ($placement) {
            case self::APPEND:
                return $content . $separator . $label;
            case self::PREPEND:
                return $label . $separator . $content;
        }
    }
}