<?php

namespace Kai\Product\Setup;

use Magento\Catalog\Model\Product;
use Magento\Catalog\Setup\CategorySetupFactory;
use Magento\Eav\Model\Entity\Attribute\ScopedAttributeInterface;
use Magento\Eav\Setup\EavSetupFactory;
use Magento\Framework\Setup\InstallDataInterface;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\ModuleDataSetupInterface;

class InstallData implements InstallDataInterface
{
    protected $eavSetupFactory;
    protected $attributeSetupFactory;

    public function __construct(
        \Magento\Eav\Setup\EavSetupFactory $eavSetupFactory,
        \Magento\Catalog\Setup\CategorySetupFactory $attributeSetupFactory)
    {
        $this->eavSetupFactory = $eavSetupFactory;
    }

    public function install(ModuleDataSetupInterface $setup, ModuleContextInterface $context)
    {
        $setup->startSetup();

        $eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);
        $eavSetup->addAttribute(
            Product::ENTITY,
            'kai_attribute',
            [
                'type' => 'varchar',
                'label' => 'Kai Attribute',
                'input' => 'text',
                'required' => false,
                'visible' => true,
                'user_defined' => true,
                'searchable' => false,
                'filterable' => false,
                'comparable' => false,
                'used_in_product_listing' => true,
                'apply_to' => '',
                'global' => ScopedAttributeInterface::SCOPE_GLOBAL,
                'group' => 'General',
            ]
        );

        $setup->endSetup();
    }
}