<?php

namespace App\WideSlide\Admin\Form;

use App\WideSlide;

class AbstractForm extends \Qs_Form
{
    protected function _initElements()
    {
        $config = \Qs_Application::getConfig('WideSlide')->toArray();

        $this->addElement('text', 'title', ['label' => 'Title', 'required' => true]);

        $resize = $config['image']['width'] . 'x' . $config['image']['height'] . $config['image']['resizeMethodAlias'];
        $validators = [
            ['IsImage', true],
            [
                'ImageSize',
                true,
                [
                    'minwidth'  => $config['image']['width'],
                    'minheight' => $config['image']['height'],
                ],
            ],
        ];
        $this->addElement(
            'extendedImage',
            'image',
            [
                'label'      => 'Image',
                'required'   => true,
                'resize'     => $resize,
                'validators' => $validators,
            ]
        );

        $this->addElement('textarea', 'description', ['label' => 'Description']);
        $description = $this->getElement('description');
        $lengthValidator = new \Qs_Validate_StringLength([
            'max'          => $config['descriptionMaxLength'],
            'elementLabel' => $description->getLabel(),
        ]);
        $description->addValidator($lengthValidator, true);
        $description->setDescription('Text space is limited to ' . $config['descriptionMaxLength'] . ' characters.');

        $this->_initLinkDisplayGroup();

        $this->addElement('checkbox', 'enabled', ['label' => 'Show on user end', 'decoration' => 'simple']);

        return $this;
    }

    /**
     * @return AbstractForm
     */
    protected function _initLinkDisplayGroup()
    {
        $groupElements = [];

        $this->addElement(
            'select',
            'linkType',
            [
                'label'        => 'Link Type',
                'multioptions' => ['none' => 'No Link', 'url' => 'URL', 'cms' => 'Site Page'],
            ]
        );
        $groupElements[] = 'linkType';

        $this->addElement(
            'text',
            'url',
            ['label' => 'URL', 'description' => 'Example: ' . constant('EXAMPLE_URL')]
        );
        if ($this->_getData('linkType') == WideSlide\AbstractObj::LINK_TYPE_URL) {
            $this->getElement('url')->addValidator('url');
        }
        $groupElements[] = 'url';

        $this->addElement(
            'select',
            'pageId',
            [
                'label'        => 'Site Page',
                'escapeLabel'  => false,
                'multioptions' => ['' => '- Select Page -'] + $this->_getPages4Select(),
            ]
        );
        $groupElements[] = 'pageId';

        $this->addElement('text', 'linkText', ['label' => 'Link Text']);
        $groupElements[] = 'linkText';

        $this->addDisplayGroup($groupElements, 'linkTypeGroup', ['legend' => 'Link']);

        if (($linkType = $this->_getData('linkType')) && WideSlide\AbstractObj::LINK_TYPE_NONE != $linkType) {
            if (WideSlide\AbstractObj::LINK_TYPE_URL == $linkType) {
                $this->getElement('url')->setRequired();
            } else {
                $this->getElement('pageId')->setRequired();
            }
            $this->getElement('linkText')->setRequired();
        }

        $groupElements = \Qs_Array::excludeValue($groupElements, 'linkType');
        $this->_addAsterisk($groupElements);
        $this->_addHiddenClass($groupElements);

        return $this;
    }

    /**
     * @return array|bool
     */
    protected function _getPages4Select()
    {
        $cmsObj = \App_Cms_Obj::getInstance();
        return $cmsObj->getPages4Select();
    }

    /**
     * @param array|string $elementsNames
     * @return AbstractForm
     */
    protected function _addAsterisk($elementsNames)
    {
        if (!is_array($elementsNames)) {
            $elementsNames = [$elementsNames];
        }

        foreach ($elementsNames as $elementName) {
            $element = $this->getElement($elementName);
            if (!$element->isRequired()) {
                $element->getDecorator('Label')->setOption('class', 'required');
            }
        }

        return $this;
    }

    /**
     * @param array|string $elementsNames
     * @return AbstractForm
     */
    protected function _addHiddenClass($elementsNames)
    {
        if (!is_array($elementsNames)) {
            $elementsNames = [$elementsNames];
        }

        foreach ($elementsNames as $elementName) {
            $element = $this->getElement($elementName);

            /** @var \Qs_Form_Decorator_Label $label */
            $label = $element->getDecorator('Label');
            $label->setTagOption('class', 'hidden');

            /** @var \Qs_Form_Decorator_HtmlTag $htmlTag */
            $htmlTag = $element->getDecorator('HtmlTag');
            $htmlTag->setOption('class', 'hidden');
        }

        return $this;
    }

    public function render(\Zend_View_Interface $view = null)
    {
        /** @var \Qs_Doc $doc */
        $doc = \Zend_Registry::get('doc');

        $doc->addScript('js/app/wideSlide/admin/form.js');

        $options = [
            'form'     => $this->getId(),
            'linkType' => $this->getElement('linkType')->getId(),
            'url'      => $this->getElement('url')->getId(),
            'pageId'   => $this->getElement('pageId')->getId(),
            'linkText' => $this->getElement('linkText')->getId(),
        ];
        $doc->addInitObject('App_WideSlide_Admin_Form', [$options], 'wideSlideFrom');

        return parent::render($view);
    }
}