<?php

namespace App\Controllers;

use App\Models\OrderModel;
use App\Models\ProductModel;
use CodeIgniter\Controller;
use CodeIgniter\HTTP\CLIRequest;
use CodeIgniter\HTTP\IncomingRequest;
use CodeIgniter\HTTP\RequestInterface;
use CodeIgniter\HTTP\ResponseInterface;
use Psr\Log\LoggerInterface;

class EcommerceController extends Controller
{
    /**
     * Instance of the main Request object.
     *
     * @var CLIRequest|IncomingRequest
     */
    protected $request;

    /**
     * An array of helpers to be loaded automatically upon
     * class instantiation. These helpers will be available
     * to all other controllers that extend BaseController.
     *
     * @var array
     */
    protected $helpers = ['Common'];

    /**
     * Be sure to declare properties for any property fetch you initialized.
     * The creation of dynamic property is deprecated in PHP 8.2.
     */
    // protected $session;

    /**
     * Constructor.
     */
    private $_session = null;
    private $_viewDatas = array();
    private $_orderModel = null;
    private $_productModel = null;
    public function initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)
    {
        parent::initController($request, $response, $logger);
        $this->_session = \Config\Services::session();
        $this->_viewDatas['title'] = '장바구니';
        $this->_viewDatas['session'] = $this->_session;
    }
    private function getOrderModel()
    {
        return $this->_orderModel = $this->_orderModel ?: new OrderModel(["product_uid", "quantity", "price", "status"]);
    }
    private function getProductModel()
    {
        return $this->_productModel = $this->_productModel ?: new ProductModel();
    }

    //주문
    private function addCart_validate()
    {
        //fieldData Rule 검사
        if (!$this->validate($this->_viewDatas['fieldRules'])) {
            throw new \Exception("{$this->_viewDatas['title']}의 검증 오류발생\n" . implode("\n", $this->validator->getErrors()));
        }
        //fieldData 적용
        $this->_viewDatas['fieldDatas'] = array();
        foreach ($this->_viewDatas['fields'] as $field) {
            $this->_viewDatas['fieldDatas'][$field] = $this->request->getVar($field);
        }
    }

    public function addCart()
    {
        $msg = "";
        try {
            $this->_viewDatas['fields'] = ["product_uid", "quantity", "price", "status"];
            $this->_viewDatas['fieldRules'] = $this->getOrderModel()->getFieldRules($this->_viewDatas['fields']);
            //Transaction 시작
            $this->getOrderModel()->transStart();
            //장바구니정보 검증
            $this->addCart_validate();
            //상품정보 가져오기
            $product = $this->getProductModel()->getEntity([$this->getProductModel()->getPrimaryKey() => $this->_viewDatas['fieldDatas']['product_uid']]);
            //재고수 비교
            if ($product->stock < $this->_viewDatas['fieldDatas']['quantity']) {
                throw new \Exception("구매수량이 너무 많습니다.\n구매수량:{$this->_viewDatas['fieldDatas']['quantity']}개, 남은 재고수량:{$product->stock}개");
            }
            //구매 금액 비교
            $price = $product->price * $this->_viewDatas['fieldDatas']['quantity'];
            if ($price != $this->_viewDatas['fieldDatas']['price']) {
                throw new \Exception("실 상품금액{$price} 와 구매금액{$this->_viewDatas['fieldDatas']['price']}이 서로 다릅니다.");
            }
            //상품명을 복사해서 구매한 상품명에 넣기
            $this->_viewDatas['fieldDatas'][$this->getOrderModel()->getTitleField()] = $product->getTitle();
            //주문추가
            $entity = $this->getOrderModel()->addCart($this->_viewDatas['fieldDatas']);
            //상품재고감소
            $product = $this->getProductModel()->addCart($product, $this->_viewDatas['fieldDatas']['quantity']);
            //주문정보 세션에 넣기
            $order_uids = $this->_session->get(SESSION_NAMES['CART']) ?: array();
            $this->_session->set(SESSION_NAMES['CART'], [...$order_uids, $entity->getPrimaryKey()]);
            //Transaction Commit
            $this->getOrderModel()->transComplete();
            $msg = sprintf(
                "%s\n 상품명:%s\n 상품갯수:%s개, 구매금액:%s원\n 장바구니에 담았습니다.",
                $this->_viewDatas['title'],
                $entity->getTitle(),
                $entity->quantity,
                number_format($entity->price)
            );
            return redirect()->to($this->_session->getFlashdata(SESSION_NAMES['RETURN_URL']));
        } catch (\Exception $e) {
            //Transaction Rollback
            $this->getOrderModel()->transRollback();
            log_message("error", $e->getMessage());
            $msg = sprintf(
                "%s에서 다음 오류로 인해 장바구니에 담기를 실패하였습니다.\n%s",
                $this->_viewDatas['title'],
                $e->getMessage()
            );
            return redirect()->to($this->_session->getFlashdata(SESSION_NAMES['RETURN_URL']));
        } finally {
            $this->_session->setFlashdata("return_message", $msg);
        }
    }

    //주문취소
    public function cancelCart($uid)
    {
        $msg = "";
        try {
            //주문정보 가져오기
            $entity = $this->getOrderModel()->getEntity([$this->getOrderModel()->getPrimaryKey() => $uid]);
            //Transaction 시작
            $this->getOrderModel()->transStart();
            //주문취소
            if (!$this->getOrderModel()->cancelCart($entity)) {
                log_message("error", __FUNCTION__ . "에서 호출:" . $this->getOrderModel()->getLastQuery());
                log_message("error", implode("\n", $this->getOrderModel()->errors()));
                throw new \Exception(__FUNCTION__ . " 오류 발생.\n" . var_export($this->getOrderModel()->errors(), true));
            }
            //상품정보 가져오기
            $product = $this->getProductModel()->getEntity([$this->getProductModel()->getPrimaryKey() => $entity->product_uid]);
            //상품반환
            $product = $this->getProductModel()->cancelCart($product, $entity->quantity);
            //주문정보 세션에서 빼기
            $order_uids = $this->_session->get(SESSION_NAMES['CART']) ?: array();
            $temps = array();
            foreach ($order_uids as $order_uid) {
                if ($order_uid != $entity->getPrimaryKey()) {
                    array_push($temps, $order_uid);
                }
            }
            $this->_session->set(SESSION_NAMES['CART'], $temps);
            //Transaction Commit
            $this->getOrderModel()->transComplete();
            $msg = "{$this->_viewDatas['title']}에서 {$entity->getTitle()} {$entity->quantity}개의 주문을 취소하였습니다.";
            return redirect()->to($this->_session->getFlashdata(SESSION_NAMES['RETURN_URL']));
        } catch (\Exception $e) {
            //Transaction Rollback
            $this->getOrderModel()->transRollback();
            $msg = sprintf(
                "%s에서 다음 오류로 인해 주문취소를 실패하였습니다.\n%s",
                $this->_viewDatas['title'],
                $e->getMessage()
            );
            log_message("error", $e->getMessage());
            return redirect()->to($this->_session->getFlashdata(SESSION_NAMES['RETURN_URL']));
        } finally {
            $this->_session->setFlashdata("return_message", $msg);
        }
    }
}