<?php
namespace Controllers;

use Libs\ResponseLib;
use Models\CategoryModel; 
use Models\ProductModel;
use Models\DescriptionModel; 
use Psr\Http\Message\ServerRequestInterface;
use Respect\Validation\Validator as v;
use Respect\Validation\Exceptions\ValidationException;

class ProductCreateController
{
    private ProductModel $productModel;
    private DescriptionModel $descriptionModel;

    public function __construct()
    {
        $this->productModel = new ProductModel();
        $this->descriptionModel = new DescriptionModel();
    }

    public function __invoke(ServerRequestInterface $request)
    {
        $body = json_decode((string)$request->getBody(), true) ?? [];

        try {
            v::key('company_id', v::intType()->positive())
            ->key('product_name', v::stringType()->notEmpty()->alnum(' '))
            ->key('product_price', v::number()->positive())
            ->key('category_id', v::intType()->positive())
            ->key('product_is_kitchen', v::optional(v::boolType()))
            ->assert($body);

        if (array_key_exists('description_text', $body)) {
            v::stringType()->notEmpty()->length(1, 70)->assert($body['description_text']);
        }

        } catch (ValidationException $e) {
            return ResponseLib::sendFail("Validation failed: " . $e->getFullMessage(), [], "E_VALIDATE")->withStatus(400);
        }

        $companyId = $body['company_id'];
        $productName = $body['product_name'];
        $productPrice = (float) $body['product_price'];
        $categoryId = $body['category_id'];
        $productIsKitchen = $body['product_is_kitchen'] ?? false;
        $descriptionText = $body['description_text'] ?? null;

        $productId = $this->productModel->createProduct(
            $productName,
            $productPrice,
            (int)$categoryId,
            (int)$companyId,
            $productIsKitchen
        );

        if (!$productId) {
            return ResponseLib::sendFail("Failed to Create Product", [], "E_DATABASE")->withStatus(402);
        }

        if ($descriptionText !== null) {
            $descriptionCreated = $this->descriptionModel->addDescription(
                (int)$productId,
                (int)$companyId,
                $descriptionText
            );

            if (!$descriptionCreated) {
                return ResponseLib::sendFail("Product created, but failed to create description.", [], "E_DATABASE")->withStatus(500);
            }
        }

        return ResponseLib::sendOk(['created' => true, 'product_id' => $productId]);
    }
}