<?php
namespace Shopkeeper\VendorNotes\Block\Adminhtml\Order\View;

use Magento\Backend\Block\Template;
use Magento\Sales\Model\Order;
use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Store\Model\ScopeInterface;

class VendorNotes extends Template
{
    protected $_order;
    protected $_scopeConfig;

    public function __construct(
        \Magento\Backend\Block\Template\Context $context,
        \Magento\Sales\Model\Order $order,
        ScopeConfigInterface $scopeConfig,
        array $data = []
    ) {
        $this->_order = $order;
        $this->_scopeConfig = $scopeConfig;
        parent::__construct($context, $data);
    }

    public function getOrder()
    {
        return $this->_order->load($this->getRequest()->getParam('order_id'));
    }

    public function getVendorNotes()
    {
        $order = $this->getOrder();
        $notes = [];
        $vendorConfigPaths = [
            'Thermo Fisher' => 'vendor_notes/general/thermo_fisher_note',
            'Orion' => 'vendor_notes/general/orion_note',
            'Nalgene' => 'vendor_notes/general/nalgene_note',
            'Thermo Fisher Parts' => 'vendor_notes/general/thermo_fisher_parts_note'
        ];

        foreach ($order->getAllItems() as $item) {
            $product = $item->getProduct();
            $vendorId = $product->getData('vendor');
            if ($vendorId) {
                $vendorLabel = $product->getAttributeText('vendor');
                if (isset($vendorConfigPaths[$vendorLabel])) {
                    $note = $this->_scopeConfig->getValue($vendorConfigPaths[$vendorLabel], ScopeInterface::SCOPE_STORE);
                    if ($note && !in_array($note, $notes)) {
                        $notes[] = $note;
                    }
                }
            }
        }

        return $notes;
    }
}