<?php
declare(strict_types=1);

namespace CakeProducts\Controller;

use Cake\Log\Log;
use Cake\Utility\Hash;
use CheeseCake\Controller\Traits\OverrideTableTrait;
use function BenTools\CartesianProduct\combinations;

/**
 * ProductSkus Controller
 *
 * @property \CakeProducts\Model\Table\ProductSkusTable $ProductSkus
 */
class ProductSkusController extends AppController
{
    use OverrideTableTrait;

    /**
     * @return void
     */
    public function initialize(): void
    {
        parent::initialize(); // TODO: Change the autogenerated stub
//        $this->_defaultTable = 'CakeProducts.ProductSkus';
//        $this->_tableConfigKey = 'CakeProducts.ProductSkus.table';
    }

    /**
     * Index method
     *
     * @return \Cake\Http\Response|null|void Renders view
     */
    public function index()
    {
        $query = $this->ProductSkus->find()
            ->contain(['Products']);
        $productSkus = $this->paginate($query);

        $this->set(compact('productSkus'));
    }

    /**
     * View method
     *
     * @param string|null $id Product Skus id.
     * @return \Cake\Http\Response|null|void Renders view
     * @throws \Cake\Datasource\Exception\RecordNotFoundException When record not found.
     */
    public function view($id = null)
    {
        $productSku = $this->ProductSkus->get($id, contain: [
            'Products',
            'ProductSkuVariantValues',
            'ProductSkuVariantValues.ProductVariants',
            'ProductSkuVariantValues.ProductVariants.ProductCategoryVariants',
            'ProductSkuVariantValues.ProductCategoryVariantOptions',
        ]);
        $this->set(compact('productSku'));
    }

    /**
     * Add method
     *
     * @return \Cake\Http\Response|null|void Redirects on successful add, renders view otherwise.
     */
    public function add($productId = null)
    {
        $toGetCartesianProductsFrom = [];
        $productSkus = [];
        $table = $this->getTable();

        $product = $table->Products->get($productId, contain: [
            'ProductSkus',
            'ProductSkus.ProductSkuVariantValues',
            'ProductVariants',
            'ProductVariants.ProductCategoryVariants',
            'ProductVariants.ProductCategoryVariants.ProductCategoryVariantOptions',
        ]);
        $existingProductSkus = Hash::combine($product->product_skus ?? [], '{n}.id', '{n}');
        $existingProductSkusForMapping = Hash::combine($product->product_skus ?? [], '{n}.id', '{n}.product_sku_variant_values');
        $existingSkusForCartesianComparison = [];
        foreach ($existingProductSkusForMapping as $existingProductSkuId => $existingProductSku) {
            $existingSkusForCartesianComparison[$existingProductSkuId] = Hash::combine($existingProductSku, '{n}.product_variant_id', '{n}.product_category_variant_option_id');
        }
        $productVariants = isset($product->product_variants) ? $product->product_variants : [];
//        dd($productVariants);
        $productVariantsMapping = Hash::combine($productVariants, '{n}.product_category_variant.id', '{n}.id');
        $productCategoryVariants = Hash::extract($productVariants, '{n}.product_category_variant');
//        dd($productCategoryVariants);
        $optionMapping = Hash::combine($productCategoryVariants, '{n}.product_category_variant_options.{n}.id', '{n}.product_category_variant_options.{n}.variant_value');
//        dd($optionMapping);

        $variantNameMapping = Hash::combine($productCategoryVariants, '{n}.id', '{n}.name');
//        dd($variantNameMapping);

        foreach ($productCategoryVariants as $productCategoryVariant) {
            $options = Hash::extract($productCategoryVariant['product_category_variant_options'] ?? [], '{n}.id');
            $toGetCartesianProductsFrom[$productVariantsMapping[$productCategoryVariant['id']]] = $options;
        }
//        dd($toGetCartesianProductsFrom);

        $numSkusToAdd = count(combinations($toGetCartesianProductsFrom));
        for ($i = 0; $i < $numSkusToAdd; $i++) {
            $productSkus[$i] = $this->getTable()->newEmptyEntity();
        }
        $this->set(compact(
            'product',
            'productSkus',
            'productCategoryVariants',
            'productVariantsMapping',
            'toGetCartesianProductsFrom',
            'optionMapping',
            'variantNameMapping',
            'numSkusToAdd',
            'existingProductSkus',
            'existingSkusForCartesianComparison'
        ));

        if ($this->request->is('post')) {
            $postedSkus = $this->request->getData();
            $saveOptions = [
                'fields' => [
                    'product_id',
                    'sku',
                    'barcode',
                    'price',
                    'cost',
                    'product_sku_variant_values',
                    'created',
                    'modified',
                    'enabled',
                ],
                'associated' => [
                    'ProductSkuVariantValues' => [
                        'fields' => [
                            'product_variant_id',
                            'product_category_variant_option_id',
                        ],
                    ],
                ],
            ];
            $finalPostData = [];
            $postedSkus = Hash::insert($postedSkus, '{n}.product_id', $productId);

            foreach ($postedSkus as $postedSkuCnt => $postedSku) {
                if (!isset($postedSku['sku']) || !$postedSku['sku']) {
                    unset($productSkus[$postedSkuCnt]);

                    continue;
                }
                $finalPostData[$postedSkuCnt] = $postedSku;
            }
            if (!$productSkus || !$postedSkus) {
                $this->Flash->error('Nothing to save! Add at least one SKU next time.');

                return;
            }
//            dd($finalPostData);
            $productSkus = $table->patchEntities($productSkus, $finalPostData, $saveOptions);
            $errors = [];
            $successes = [];
            foreach ($productSkus as $productSkuToSave) {
//                dd($productSkuToSave);

                if (!$table->save($productSkuToSave, $saveOptions)) {
                    Log::debug(print_r('$productSkuToSave->getErrors()', true));
                    Log::debug(print_r($productSkuToSave->getErrors(), true));
                    dd($productSkuToSave->getErrors());
                    continue;
                }
                $successes[] = $productSkuToSave;
            }

            if ($successes) {
                $this->Flash->success(__(count($successes) . ' New SKUs have been saved.'));

                return $this->redirect(['action' => 'index']);
            }

            $this->Flash->error(__('The product SKU(s) could not be saved. Please, try again.'));
        }
        $this->set(compact(
            'productSkus'
        ));
    }

    /**
     * Edit method
     *
     * @param string|null $id Product Skus id.
     * @return \Cake\Http\Response|null|void Redirects on successful edit, renders view otherwise.
     * @throws \Cake\Datasource\Exception\RecordNotFoundException When record not found.
     */
    public function edit($id = null)
    {
        $productSku = $this->ProductSkus->get($id, contain: []);
        if ($this->request->is(['patch', 'post', 'put'])) {
            $postData = $this->request->getData();
            $saveOptions = [
                'associated' => [],
            ];
            //            Log::debug(print_r('$postData', true));
//            Log::debug(print_r($postData, true));
//            Log::debug(print_r('$saveOptions', true));
//            Log::debug(print_r($saveOptions, true));
            $productSku = $this->ProductSkus->patchEntity($productSku, $postData, $saveOptions);
            if ($this->ProductSkus->save($productSku)) {
                $this->Flash->success(__('The product skus has been saved.'));

                return $this->redirect(['action' => 'index']);
            }
            Log::debug(print_r('$productSku->getErrors() next - failed in productSkus/edit', true));
            Log::debug(print_r($productSku->getErrors(), true));
            $this->Flash->error(__('The product skus could not be saved. Please, try again.'));
        }
        $products = $this->ProductSkus->Products->find('list', limit: 200)->all();
        $this->set(compact('productSku', 'products'));
    }

    /**
     * Delete method
     *
     * @param string|null $id Product Skus id.
     * @return \Cake\Http\Response|null Redirects to index.
     * @throws \Cake\Datasource\Exception\RecordNotFoundException When record not found.
     */
    public function delete($id = null)
    {
        $this->request->allowMethod(['post', 'delete']);
        $productSku = $this->ProductSkus->get($id);
        if ($this->ProductSkus->delete($productSku)) {
            $this->Flash->success(__('The product skus has been deleted.'));
        } else {
            $this->Flash->error(__('The product skus could not be deleted. Please, try again.'));
        }

        return $this->redirect(['action' => 'index']);
    }
}