<?php

namespace App\Controllers\Admin;

use App\Entities\OrderEntity;
use App\Models\OrderModel;
use CodeIgniter\HTTP\RequestInterface;
use CodeIgniter\HTTP\ResponseInterface;
use Psr\Log\LoggerInterface;
use App\Models\ProductModel;

class OrderController extends AdminController
{
    private $_productModel = null;
    private $_product_uids = array();
    public function initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)
    {
        parent::initController($request, $response, $logger);
        $this->_className .= 'Order';
        $this->_model = new OrderModel();
        helper($this->_className);
        $this->_viewPath .= strtolower($this->_className);
        $this->_viewDatas['title'] = lang($this->_className . '.title');
        $this->_viewDatas['className'] = $this->_className;
    }
    //Porduct모델
    final protected function getProductModel(): ProductModel
    {
        return is_null($this->_productModel) ? new ProductModel() : $this->_productModel;
    }

    //Field별 Form Option용
    protected function getFieldFormOption(string $field): array
    {
        switch ($field) {
            case 'product_uid':
                $options = $this->_product_uids = $this->_product_uids ?: $this->getProductModel()->getFieldFormOptions([]);
                break;
            default:
                return parent::getFieldFormOption($field);
                break;
        }
        if (!is_array($options)) {
            throw new \Exception(__FUNCTION__ . "에서 {$this->_className}의 Field:{$field}의 FormOptionData가 array가 아닙니다.\n" . var_export($options, true));
        }
        return $options;
    }

    //구매상품검사
    protected function insert_process(): OrderEntity
    {
        //상품정보가져오기
        $product = $this->getProductModel()->getEntity([$this->getProductModel()->getPrimaryKey() => $this->_viewDatas['fieldDatas']['product_uid']]);
        if (!$this->_viewDatas['fieldDatas']['quantity']) {
            throw new \Exception("제품 구매수량을 확인해주세요");
        }
        if (!$this->_viewDatas['fieldDatas']['price']) {
            throw new \Exception("제품 구매금액을 확인해주세요");
        }
        if ($product->getStock() < $this->_viewDatas['fieldDatas']['quantity']) {
            throw new \Exception(sprintf(
                "%s의 재고수[%s]보다 많은 수량[%s]을 주문하셨습니다.\\n",
                $product->getTitle(),
                $product->getStock(),
                $this->_viewDatas['fieldDatas']['quantity']
            ));
        }
        //구매금액 = (판매가-할인가)*구매수량과 맞는지 다시 확인.
        // $calculated_price = ($product->getPrice() - $product->getSale()) * $quantity;
        $calculated_price = ($product->getPrice() - $product->getSale()) * $this->_viewDatas['fieldDatas']['quantity'];
        if ($this->_viewDatas['fieldDatas']['price'] != $calculated_price) {
            throw new \Exception(
                sprintf(
                    "%s상품의 구매금액[%s원]과 판매금액[%s원]이 맞지않습니다.",
                    $product->getTitle(),
                    number_format($this->_viewDatas['fieldDatas']['price']),
                    number_format($calculated_price)
                )
            );
        }
        //상품모델에서 Order에 담은 갯수만큼 재고에서 뺀다.
        $this->getProductModel()->decreaseStock($product, $this->_viewDatas['fieldDatas']['quantity']);
        return parent::insert_process();
    }

    //장바구니에 담기
    public function insert()
    {
        $msg = "";
        try {
            $this->_viewDatas['fields'] = $this->_model->getFields('insert');
            $this->_viewDatas['fieldRules'] = $this->_model->getFieldRules($this->_viewDatas['fields'], 'insert');
            $this->_viewDatas['fieldFilters'] = $this->_model->getFieldFilters();
            $this->insert_validate();
            //Transaction manully 시작
            $this->_model->transBegin();
            $this->insert_process();
            //Transaction manully Commit
            $this->_model->transCommit();
            $msg = sprintf(
                "%s에서 상품 %s개를 장바구니에 담았습니다.",
                $this->_viewDatas['title'],
                $this->_viewDatas['fieldDatas']['quantity']
            );
            return redirect()->to($this->_session->getFlashdata(SESSION_NAMES['RETURN_URL']));
        } catch (\Exception $e) {
            //Transaction manully Rollback
            $this->_model->transRollback();
            $msg = sprintf(
                "%s에서 다음 오류로 인해 장바구니에 담기를 실패하였습니다.\n%s",
                $this->_viewDatas['title'],
                $e->getMessage()
            );
            log_message("error", $e->getMessage());
            log_message("error", var_export($this->_viewDatas['fieldDatas'], true));
            return redirect()->to($this->_session->getFlashdata(SESSION_NAMES['RETURN_URL']));
        } finally {
            $this->_session->setFlashdata("return_message", $msg);
        }
    }


    //View관련
    protected function view_process($entity)
    {
        $this->_viewDatas['user'] = $this->getUserModel()->getEntity([$this->getUserModel()->getPrimaryKey() => $entity->getUser_uid()]);
        $this->_viewDatas['product'] = $this->getProductModel()->getEntity([$this->getProductModel()->getPrimaryKey() => $entity->getProduct_uid()]);
        return $entity;
    }
}