<?php

use Qs\Html;
use Qs\Html\SelectOption;

class Qs_View_Helper_FormSelect extends Zend_View_Helper_FormSelect
{
    protected $_escapeLabel = true;
    protected $_info;

    public function setEscapeLabel($flag)
    {
        $this->_escapeLabel = (bool) $flag;
        return $this;
    }

    public function getEscapeLabel()
    {
        return $this->_escapeLabel;
    }

    public function formSelect($name, $value = null, $attribs = null,
                               $options = null, $listsep = "<br />\n")
    {
        $info = $this->_getInfo($name, $value, $attribs, $options, $listsep);

        $name = $id = $value = $attribs = $options = $listsep = $disable = null;
        extract($info); // name, id, value, attribs, options, listsep, disable

        // force $value to array so we can compare multiple values to multiple
        // options; also ensure it's a string for comparison purposes.
        $value = array_map('strval', (array) $value);

        // check if element may have multiple values
        $multiple = '';

        if (substr($name, -2) == '[]') {
            // multiple implied by the name
            $multiple = ' multiple="multiple"';
        }

        if (isset($attribs['escapeLabel'])) {
            $this->setEscapeLabel($attribs['escapeLabel']);
            unset($attribs['escapeLabel']);
        }
        if (isset($attribs['multiple'])) {
            // Attribute set
            if ($attribs['multiple']) {
                // True attribute; set multiple attribute
                $multiple = ' multiple="multiple"';

                // Make sure name indicates multiple values are allowed
                if (!empty($multiple) && (substr($name, -2) != '[]')) {
                    $name .= '[]';
                }
            } else {
                // False attribute; ensure attribute not set
                $multiple = '';
            }
            unset($attribs['multiple']);
        }

        // now start building the XHTML.
        $disabled = '';
        if (true === $disable) {
            $disabled = ' disabled="disabled"';
        }

        // Build the surrounding select element first.
        $xhtml = '<select'
            . ' name="' . $this->view->escape($name) . '"'
            . ' id="' . $this->view->escape($id) . '"'
            . $multiple
            . $disabled
            . $this->_htmlAttribs($attribs)
            . ">\n    ";

        // build the list of options
        $list = [];
        foreach ((array) $options as $opt_value => $opt_label) {
            if (is_array($opt_label)) {
                $opt_disable = '';
                if (is_array($disable) && in_array($opt_value, $disable)) {
                    $opt_disable = ' disabled="disabled"';
                }
                $list[] = '<optgroup'
                    . $opt_disable
                    . ' label="' . $this->view->escape($opt_value) . '">';
                foreach ($opt_label as $val => $lab) {
                    $list[] = $this->_build($val, $lab, $value, $disable);
                }
                $list[] = '</optgroup>';
            } else {
                $list[] = $this->_build($opt_value, $opt_label, $value, $disable);
            }
        }

        // add the options to the xhtml and close the select
        $xhtml .= implode("\n    ", $list) . "\n</select>";

        return $xhtml;
    }

    protected function _build($value, $label, $selected, $disable, $optionClasses = [])
    {
        $attribs = [];
        if ($label instanceof SelectOption) {
            $attribs = $label->getAttribs();
            $label = $label->getLabel();
        }
        if (is_bool($disable)) {
            $disable = [];
        }
        $class = null;
        if (array_key_exists($value, $optionClasses)) {
            $class = $optionClasses[$value];
        }
        $attribs['value'] = $value;
        if ($class) {
            $attribs['class'] = $class;
        }
        if (in_array((string) $value, $selected)) {
            $attribs['selected'] = 'selected';
        }
        if (in_array($value, $disable)) {
            $attribs['disabled'] = 'disabled';
        }
        return Html::renderContainer('option', $this->escapeLabel($label), $attribs);
    }

    protected function escapeLabel($label)
    {
        if ($this->getEscapeLabel()) {
            return $this->view->escape($label);
        }
        return $label;
    }
}