<?php

/**
 * Class helper_plugin_data_aliastextbox
 *
 * Create a field with properties defined by given type alias
 * Mostly this is a single line input field, but for enum type a select field.
 */
class helper_plugin_data_aliastextbox extends helper_plugin_bureaucracy_field
{
    private $args;
    private $additional;

    /**
     * Arguments:
     *  - cmd
     *  - label
     *  - _typealias (optional)
     *  - ^ (optional)
     *
     * @param array $args The tokenized definition, only split at spaces
     */
    public function initialize($args)
    {
        $this->init($args);
        $n_args = [];
        $this->args = [];
        foreach ($args as $arg) {
            if ($arg[0] !== '_') {
                $n_args[] = $arg;
                continue;
            }
            $this->args[] = $arg;
        }
        $this->standardArgs($n_args);
    }

    /**
     * Prepare
     *
     * @param array $args data plugin related field arguments
     */
    private function prepareColumns($args)
    {
        /** @var helper_plugin_data $dthlp */
        $dthlp = plugin_load('helper', 'data');
        if (!$dthlp) msg('Loading the data helper failed. Make sure the data plugin is installed.', -1);

        foreach ($args as $arg) {
            $arg = $this->replaceTranslation($arg);
            $datatype = $dthlp->column($arg);
            if (is_array($datatype['type'])) {
                $datatype['basetype'] = $datatype['type']['type'];
                $datatype['enum'] = $datatype['type']['enum'];
                $datatype['type'] = $datatype['origtype'];
            } else {
                $datatype['basetype'] = $datatype['type'];
            }
        }
        $datatype['title'] = '@@DISPLAY@@';
        if (isset($datatype['enum'])) {
            $values = preg_split('/\s*,\s*/', $datatype['enum']);
            if (!$datatype['multi'] && $this->opt['optional']) array_unshift($values, '');
            $this->opt['args'] = $values;
            $this->additional = ($datatype['multi'] ? ['multiple' => 'multiple'] : []);
        } else {
            $classes = 'data_type_' . $datatype['type'] . ($datatype['multi'] ? 's' : '') . ' ' .
                'data_type_' . $datatype['basetype'] . ($datatype['multi'] ? 's' : '');
            $content = form_makeTextField('@@NAME@@', '@@VALUE@@', '@@DISPLAY@@', '@@ID@@', '@@CLASS@@ ' . $classes);

            $this->tpl = $content;
        }
        if (!isset($this->opt['display'])) {
            $this->opt['display'] = $this->opt['label'];
        }
    }

    /**
     * Render the field as XHTML
     *
     * Creates a single line input field or select field
     *
     * @params array     $params Additional HTML specific parameters
     * @params Doku_Form $form   The target Doku_Form object
     * @params int       $formid unique identifier of the form which contains this field
     */
    public function renderfield($params, Doku_Form $form, $formid)
    {
        $this->prepareColumns($this->args);

        if (isset($this->tpl)) {
            parent::renderfield($params, $form, $formid);
        } else {
            // Is an enum type, otherwise $this->tpl would be set in __construct
            $this->_handlePreload();
            if (!$form->_infieldset) {
                $form->startFieldset('');
            }
            if ($this->error) {
                $params['class'] = 'bureaucracy_error';
            }
            $params = array_merge($this->opt, $params);
            $params['value'] = preg_split('/\s*,\s*/', $params['value'], -1, PREG_SPLIT_NO_EMPTY);
            if (count($params['value']) === 0) {
                $params['value'] = $params['args'][0];
            }
            if (!isset($this->opt['optional'])) {
                $this->additional['required'] = 'required';
            }

            $form->addElement(call_user_func_array(
                'form_makeListboxField',
                $this->_parse_tpl(
                    [
                        '@@NAME@@[]',
                        $params['args'],
                        $params['value'],
                        '@@DISPLAY@@',
                        '',
                        '@@CLASS@@',
                        $this->additional
                    ],
                    $params
                )
            ));
        }
    }

    /**
     * Handle a post to the field
     *
     * Accepts and validates a posted value.
     *
     * @param string $value The passed value or array or null if none given
     * @param helper_plugin_bureaucracy_field[] $fields (reference) form fields (POST handled upto $this field)
     * @param int $index index number of field in form
     * @param int $formid unique identifier of the form which contains this field
     * @return bool Whether the passed value is valid
     */
    public function handlePost($value, &$fields, $index, $formid)
    {
        if (is_array($value)) {
            $value = implode(', ', $value);
        }

        return parent::handlePost($value, $fields, $index, $formid);
    }

    /**
     * Replace the translation placeholders
     *
     * @param string $string
     * @return string parsed string
     */
    private function replaceTranslation($string)
    {
        global $ID;
        global $conf;

        $lang = $conf['lang'];
        $trans = '';

        /** @var helper_plugin_translation $translationPlugin */
        $translationPlugin = plugin_load('helper', 'translation');
        if ($translationPlugin) {
            $trans = $translationPlugin->getLangPart($ID);
            $lang = $translationPlugin->realLC('');
        }

        $string = str_replace('@LANG@', $lang, $string);
        return str_replace('@TRANS@', $trans, $string);
    }
}