<?php
use MagentoFrameworkAppBootstrap;
include('app/bootstrap.php');

// add bootstrap
$bootstraps = Bootstrap::create(BP, $_SERVER);
$object_Manager = $bootstraps->getObjectManager();

$app_state = $object_Manager->get('MagentoFrameworkAppState');
$app_state->setAreaCode('frontend');

// get date
$today_date = date("m/d/Y");
$added_date = date('m/d/Y',strtotime("+17 day"));

$set_product = $object_Manager->create('MagentoCatalogModelProduct');

try{
    $set_product->setWebsiteIds(array(1));
    $set_product->setAttributeSetId(4);
    $set_product->setTypeId('simple');
    $set_product->setCreatedAt(strtotime('now'));
    // time of product creation
    $set_product->setName('Test Sample Products');
    // add Name of Product
    $set_product->setSku('add-sku-1');
    // add sku hear
    $set_product->setWeight(1.0000);
    // add weight of product
    $set_product->setStatus(1);
    $category_id= array('3,4');
    // add your catagory id
    $set_product->setCategoryIds($category_id);
    // Product Category
    $set_product->setTaxClassId(0);
    // type of tax class
    // (0 - none, 1 - default, 2 - taxable, 4 - shipping)
    $set_product->setVisibility(4);
    // catalog and search visibility
    $set_product->setManufacturer(28);
    // manufacturer id
    $set_product->setColor(24);
    //print_r($_product);die;
    $set_product->setNewsFromDate($today_date);
    // product set as new from
    $set_product->setNewsToDate($added_date);
    /* // add image path hear
    $set_product->setImage('/testimg/test.jpg');
    // add small image path hear
    $set_product->setSmallImage('/testimg/test1.jpg');
    // add Thumbnail image path hear
    $set_product->setThumbnail('/testimg/test2.jpg');
    // product set as new to
     */$set_product->setCountryOfManufacture('AF');
    // country of manufacture (2-letter country code)
    $set_product->setPrice(100.99) ;
    // price in form 100.99
    $set_product->setCost(88.33);
    // price in form 88.33
    $set_product->setSpecialPrice(99.85);
    // special price in form 99.85
    $set_product->setSpecialFromDate('06/1/2016');
    // special price from (MM-DD-YYYY)
    $set_product->setSpecialToDate('06/30/2018');
    // special price to (MM-DD-YYYY)
    $set_product->setMsrpEnabled(1);
    // enable MAP
    $set_product->setMsrpDisplayActualPriceType(1);
    // display actual price
    // (1 - on gesture, 2 - in cart, 3 - before order confirmation, 4 - use config)
    $set_product->setMsrp(99.99);
    // Manufacturer's Suggested Retail Price
    $set_product->setMetaTitle('test meta title 2');
    $set_product->setMetaKeyword('test meta keyword 2');
    $set_product->setMetaDescription('test meta description 2');
    $set_product->setDescription('This is a long description');
    $set_product->setShortDescription('This is a short description');
    $set_product->setStockData(
        array(
        'use_config_manage_stock' => 0,
        // checkbox for 'Use config settings'
        'manage_stock' => 1, // manage stock
        'min_sale_qty' => 1, // Shopping Cart Minimum Qty Allowed
        'max_sale_qty' => 2, // Shopping Cart Maximum Qty Allowed
        'is_in_stock' => 1, // Stock Availability of product
        'qty' => 100 // qty of product
        )
    );

    $obj = MagentoFrameworkAppObjectManager::getInstance();

    /** @var MagentoFrameworkFilesystem $filesystem */
    $filesystem = $obj->create('MagentoFrameworkFilesystem');
    /** @var MagentoFrameworkFilesystemDirectoryWriteInterface $mediaDirectory */
    $mediaDirectory = $filesystem->getDirectoryWrite(MagentoFrameworkAppFilesystemDirectoryList::MEDIA);
    $mediaPath = $mediaDirectory->getAbsolutePath();

    //Sample product id
    /* $productId = 1;
    $model = $obj->create('MagentoCatalogModelProduct');
    $product = $model->load($productId); */
    /* $mainImage = 'test.jpg';
    if ($mainImage) {
        $image_directory = $mediaPath.'testimg/'. $mainImage;
        if (file_exists($image_directory)) {
            $set_product->setMediaGallery(array('images' => array(), 'values' => array()))//media gallery initialization
                ->addImageToMediaGallery($image_directory, array('image', 'thumbnail', 'small_image'), false, false);//assigning image, thumb and small image to media gallery
        }
        else {
            $image_directory = $mediaPath.'testimg/'. 'test2.jpg';
            $set_product->setMediaGallery(array('images' => array(), 'values' => array()))//media gallery initialization
                ->addImageToMediaGallery($image_directory, array('image', 'thumbnail', 'small_image'), false, false);
        }
    } */
    $mainImage = $mediaPath.'testimg/test.jpg';
    $mainImage1 = $mediaPath.'testimg/test1.jpg';
    $mainImage2 = $mediaPath.'testimg/test2.jpg';
    $set_product->setImage(
                $mainImage
            )
            ->setSmallImage(
                $mainImage1
            )
            ->setThumbnail(
                $mainImage2
            )
            ->addImageToMediaGallery(
              $mainImage,
                null,
                false,
                false
            )->addImageToMediaGallery(
                $mainImage1,
                null,
                false,
                false
            )->addImageToMediaGallery(
                $mainImage2,
                null,
                false,
                false
            );
     $set_product->save();
    // get id of product
    $get_product_id = $set_product->getId();
    echo "Upload simple product id :: ".$get_product_id."n";
}
catch (Exception $e) {
    echo $e->getMessage();
}