<?php

declare(strict_types=1);

namespace Lewp\Forms;

class Torunn
{

    private static $direct_inputs = [
        'input'
    ];

    private static $indirect_inputs = [
        'select'
    ];

    public static function fill(\DOMNode $form, array $data_array)
    {
        self::traverse($form, $data_array);
    }

    private static function traverse($node, array &$data, bool $recursive = true)
    {
        $children = $node->childNodes;
        $children_count = count($children);
        for ($i = 0; $i < $children_count; ++$i) {
            $child = $children[$i];

            if (in_array($child->tagName, self::$direct_inputs)) {
                self::fillDirectInput($child, array_shift($data) ?? '');
                continue;
                //$child->setAttribute('value', array_shift($data) ?? 'empty');
            }

            if ($child->tagName === 'select') {
                self::fillSelectElement($child, array_shift($data) ?? '');
                continue;
            }

            if ($recursive) {
                self::traverse($child, $data);
            }
        }
    }

    private static function fillDirectInput($node, $value)
    {
        if ($value === '') {
            return;
        }
        $node->setAttribute('value', $value);
    }

    private static function fillSelectElement($node, $value)
    {
        if ($value === '') {
            return;
        }
        $children = $node->childNodes;
        foreach ($children as $child) {
            if (($child->tagName === 'option')
                && ($child->getAttribute('value') === $value)
            ) {
                $child->setAttribute('selected', 'selected');
                return;
            }
        }
    }
}