<?php

namespace App\Http\Controllers\Dashboard\Compilation;

use App\Http\Controllers\Controller as ExController;
use App\Models\Category;
use App\Models\Compilation;
use App\Models\Product;
use Illuminate\Http\Request;

use App\Http\Requests\Dashboard\Compilation\Store as StoreRequest;
use App\Http\Requests\Dashboard\Compilation\Update as UpdateRequest;

use App\Jobs\Dashboard\Compilation\Store as StoreJob;
use App\Jobs\Dashboard\Compilation\Update as UpdateJob;

class Controller extends ExController
{

    protected $products;
    protected $compilation;
    protected $categories;

    /**
     * Controller constructor.
     * @param Product $product
     * @param Compilation $compilation
     * @param Category $category
     */
    public function __construct(Product $product, Compilation $compilation, Category $category)
    {
        $this->products = $product;
        $this->compilation = $compilation;
        $this->categories = $category;
    }

    /**
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View
     * @throws \Illuminate\Auth\Access\AuthorizationException
     */
    public function index()
    {
        $this->authorize('view', 'compilations');
        $compilations = Compilation::orderBy('position', 'asc')->get();
        return view('dashboard.compilations.index', compact('compilations'));
    }

    public function store(StoreRequest $request)
    {
        if ($request->isMethod('get')) {
            $this->authorize('create', 'compilations');

            $categories = $this->categoryOptions();
            return view('dashboard.compilations.store', compact('categories'));
        }

        $this->dispatchSync(new StoreJob($request));

        $this->success(trans('admin.messages.created'));
        return response()->json([
            'status' => true
        ]);
    }

    /**
     * @param Compilation $compilation
     * @param UpdateRequest $request
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\Http\JsonResponse|\Illuminate\View\View
     * @throws \Illuminate\Auth\Access\AuthorizationException
     */
    public function update(Compilation $compilation, UpdateRequest $request)
    {
        if ($request->isMethod('get')) {
//            $this->authorize('content-manager');

            $this->authorize('update', 'compilations');

            $products = $compilation->dashboardProducts()
                ->select('products.id', 'products.name', 'products.poster')
                ->get();

            foreach ($products as $product) {
                $product->poster = $product->getPoster();
                $product->name = $product->name['ru'];
            }

            $compilation->setRelation('products', $products);

            $categories = $this->categoryOptions();


            return view('dashboard.compilations.update', compact('compilation', 'categories'));
        }

        $this->dispatchSync(new UpdateJob($request, $compilation));

        $this->info(trans('admin.messages.updated'));
        return response()->json([
            'status' => true
        ]);
    }

    /**
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function search(Request $request)
    {
        $query = trim((string) $request->name);
        $categoryId = (int) $request->get('category_id');

        $product = $this->products
            ->newQuery()
            ->whereNull('child_id')
            ->when($categoryId > 0, function ($builder) use ($categoryId) {
                $categoryIds = $this->categoryIdsWithChildren($categoryId);

                if (empty($categoryIds)) {
                    $builder->whereRaw('1 = 0');
                    return;
                }

                $builder->whereHas('categories', function ($category) use ($categoryIds) {
                    $category->whereIn('categories.id', $categoryIds);
                });
            })
            ->when($query !== '', function ($builder) use ($query) {
                $builder->where(function ($search) use ($query) {
                    $search
                        ->where('name->ru', 'like', '%' . $query . '%')
                        ->orWhere('name->uz', 'like', '%' . $query . '%')
                        ->orWhere('article_number', 'like', '%' . $query . '%');
                });
            })
            ->orderBy('id', 'desc')
            ->limit(30)
            ->get()
            ->map(function ($product) {
            return [
                'id' => $product->id,
                'poster' => $product->getPoster(),
                'name' => $product->name['ru']
            ];
        });

        return response()->json([
            'status' => true,
            'products' => $product
        ]);
    }

    private function categoryIdsWithChildren(int $categoryId): array
    {
        if (!Category::whereKey($categoryId)->exists()) {
            return [];
        }

        return $this->collectCategoryIds($categoryId);
    }

    private function collectCategoryIds(int $categoryId, array $visited = []): array
    {
        if (in_array($categoryId, $visited, true)) {
            return [];
        }

        $visited[] = $categoryId;
        $ids = [$categoryId];

        $children = Category::where('parent_id', $categoryId)
            ->orderBy('position')
            ->pluck('id');

        foreach ($children as $childId) {
            $ids = array_merge($ids, $this->collectCategoryIds((int) $childId, $visited));
        }

        return array_values(array_unique($ids));
    }

    private function categoryOptions($parentId = null, string $prefix = '')
    {
        return Category::select('id', 'name', 'parent_id')
            ->when($parentId === null, function ($query) {
                $query->whereNull('parent_id');
            }, function ($query) use ($parentId) {
                $query->where('parent_id', $parentId);
            })
            ->orderBy('position')
            ->get()
            ->flatMap(function (Category $category) use ($prefix) {
                $ru = $category->name['ru'] ?? $category->name['uz'] ?? '';
                $uz = $category->name['uz'] ?? $ru;

                return collect([[
                    'id' => $category->id,
                    'name' => [
                        'ru' => $prefix . $ru,
                        'uz' => $prefix . $uz,
                    ],
                ]])->merge($this->categoryOptions($category->id, $prefix . '- '));
            })
            ->values();
    }

    /**
     * @param Compilation $compilation
     * @return \Illuminate\Http\RedirectResponse
     * @throws \Exception
     */
    public function delete(Compilation $compilation)
    {
        $this->authorize('delete', 'compilations');
        $compilation->delete();
        $this->info(trans('admin.messages.updated'));
        return redirect()->back();
    }
}