<?php

namespace App\Endpoint\Api\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Store\Store;
use App\Models\{ProductSku, ProductSpu};
use App\Helpers\Paginator;
use App\Models\Store\ProductSku as StoreProductSku;
use App\Endpoint\Api\Http\Resources\{StoreResource, StoreProductSkuResource, StoreProductSpuResource};
use App\Endpoint\Api\Http\Resources\ProductFeatureResource;
use App\Events\ProductSkuViewed;

class StoreController extends Controller
{
    public function index(Request $request)
    {
        $query = Store::effective()->sort();
        if ($request->filled('title')) {
            $query->where('title', 'like', '%'.$request->input('title').'%');
        }

        $list = $query->simplePaginate($request->input('per_page', 10));

        return StoreResource::collection($list);
    }

    public function show($id)
    {
        $info = Store::findOrFail($id);

        return StoreResource::make($info);
    }

    public function productSpus($id, Request $request)
    {
        $store = Store::findOrFail($id);

        $input = $request->all();

        if ($request->isNotFilled('sort')) {
            $input['sort'] = '-id';
        }

        // $spuIds = StoreProductSku::where('store_id', $store->id)->where('status', 1)->pluck('product_spu_id')->toArray();
        // $spuIds = array_unique($spuIds);
        // $spuIds = array_values($spuIds);

        $list = $store->productSpus()
            ->with(['specs'])
            ->filter($input)
            ->wherePivot('status', 1)
            ->groupBy('store_product_skus.spu_id')
            ->simplePaginate(Paginator::resolvePerPage('per_page', 20, 50));

        return StoreProductSpuResource::collection($list);
    }

    public function productSpu($store, $id, Request $request)
    {
        $store = Store::findOrFail($store);

        $user = $request->user();
        $spu = $store->productSpus()->with(['specs', 'features'])->findOrFail($id);

        $sku = $store->productSkus()->where('product_spu_id', $spu->id)->first();
        if (!$sku) {
            throw new BizException('商品sku未上架');
        }
        // 主商品的规格
        $spuSpecs = [];

        if (count($original = (array) $sku->specs) > 0) {
            $skus = $spu->skus()->get(['id', 'specs', 'stock', 'release_at']);

            $mapSkus = $skus->mapWithKeys(function ($item) {
                $key = implode('_', $item->specs) ?: $item->id;

                return [$key => $item];
            });

            foreach ($spu->specs as $spec) {
                $spuSpecItems = [];

                foreach ($spec->items as $value) {
                    // 根据当前 SKU 的规格，组装可能出现的其它规格组合
                    $jSpecs = $original;
                    $jSpecs[$spec->id] = $value['name'];

                    $key = implode('_', $jSpecs);
                    $mapSku = $mapSkus->get($key);
                    if ($mapSku) {
                        $spuSpecItems[] = [
                            'name' => $value['name'],
                            'selected' => $sku->is($mapSku),
                            'sku_id' => (int) $mapSku?->id,
                            'sku_stock' => (int) $mapSku?->saleable_stock,
                        ];
                    }

                }

                $spuSpecs[] = [
                    'name' => $spec->name,
                    'items' => $spuSpecItems,
                ];
            }
        }

        ProductSkuViewed::dispatch($user, $sku, now());

        // 是否收藏商品
        $isCollected = (bool) $user?->skuFavorites()->where('sku_id', $sku->id)->exists();

        return response()->json([
            'spu_specs' => $spuSpecs,
            'sku' => StoreProductSkuResource::make($sku),
            'is_collected' => $isCollected,
            'features' => ProductFeatureResource::collection($spu->features),
            'is_pre_sale' => !!$spu->is_pre_sale
        ]);
    }

    public function productSkus($id, Request $request)
    {
        $store = Store::findOrFail($id);
        $query = $store->productSkus()
            ->select(['product_skus.id', 'product_skus.specs', 'product_skus.name', 'product_skus.cover', 'product_skus.sell_price', 'product_skus.vip_price', 'product_skus.market_price', 'store_product_skus.amount'])
            ->filter($request->all())
            ->when($request->filled('id'), function ($q) use ($request) {
                $id = explode(',', $request->input('id'));
                $q->whereIn('product_skus.id', $id);
            })
            ->wherePivot('status', 1);

        if ($request->input('per_page') == -1) {
            $list = $query->get();
        } else {
            $list = $query->simplePaginate(Paginator::resolvePerPage('per_page', 20, 50));
        }
        return StoreProductSkuResource::collection($list);
    }

    public function productSku($store, $id, Request $request)
    {
        $store = Store::findOrFail($store);
        $sku = $store->productSkus()->findOrFail($id);

        return StoreProductSkuResource::make($sku);
    }
}