<?php

class Qs_Form_Filter extends Qs_Form
{
    protected $_ajaxValidation = false;
    protected $_filterFields = [];
    protected $_filterQueryDescriptionFormat = 'Search will be done by %fields%.';
    protected $_descriptionPlaceholder = '%fields%';

    protected function _initElements()
    {
        $this->addElement(
            'text',
            'query',
            ['label' => 'Search', 'size' => 50, 'filters' => [new Zend_Filter_StringTrim()]]
        );
        $this->_setQueryDescription();

        return $this;
    }

    public function setOptions(array $options)
    {
        if (isset($options['filterFields'])) {
            $this->_filterFields = $options['filterFields'];
            unset($options['filterFields']);
        }
        if (isset($options['filterQueryDescriptionFormat'])) {
            $this->_filterQueryDescriptionFormat = $options['filterQueryDescriptionFormat'];
            unset($options['filterQueryDescriptionFormat']);
        }
        if (isset($options['descriptionPlaceholder'])) {
            $this->_descriptionPlaceholder = $options['descriptionPlaceholder'];
            unset($options['descriptionPlaceholder']);
        }
        return parent::setOptions($options);
    }

    protected function _setQueryDescription()
    {
        if (!empty($this->_filterFields)) {
            $description = $this->_filterQueryDescriptionFormat;
            if (false !== strpos($description, $this->_descriptionPlaceholder)) {
                $fields = '"' . Qs_Array::implodeLast('", "', '" or "', $this->_filterFields) . '"';
                $description = str_replace($this->_descriptionPlaceholder, $fields, $this->_filterQueryDescriptionFormat);
            }
            $this->getElement('query')->setDescription($description);
        }

        return $this;
    }

    public function addSearchButton()
    {
        return $this->addElement('submit', 'btnSearch', [
            'label'  => 'Search',
            'ignore' => true,
            'class'  => 'btn btn-primary',
        ]);
    }

    public function addResetButton()
    {
        $this->addElement(
            'submit',
            'btnReset',
            [
                'label'   => 'Reset',
                'ignore'  => true,
                'attribs' => [
                    'class'   => 'btn btn-light',
                    'onclick' => "document.location='" . constant('BASE_URL') . '/' . constant('CURRENT_PAGE') . "';",
                    'helper'  => 'formInputButton',
                ],
            ]
        );
        return $this;
    }

    public function addButtons()
    {
        $this->addSearchButton();
        $this->addResetButton();
        $this->addDisplayGroup(['btnSearch', 'btnReset'], 'submitGroup');
        return $this;
    }

    public function isSubmitted()
    {
        $method = $this->getMethod();
        if (0 == strcasecmp($_SERVER['REQUEST_METHOD'], $method)) {
            $formData = ($method == 'get') ? $_GET : $_POST;
            if (array_key_exists('__idItem', $this->_elements)) {
                if ($this->getElement('__idItem')->getValue() == Qs_Array::get($formData, '__idItem')) {
                    return true;
                }
            } else {
                /** @var Zend_Form_Element $element */
                foreach ($this->_elements as $element) {
                    if (array_key_exists($element->getName(), $formData)) {
                        return true;
                    }
                }
            }
        }

        return false;
    }
}