<?php

namespace App\Http\Controllers\Woo;

use App\Http\Controllers\Controller;
use App\Models\WooProduct;
use App\Models\WooStore;
use App\Services\Woo\CatalogSyncService;
use App\Services\Woo\CatalogWriteService;
use App\Services\Woo\ProductMediaService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;
use Illuminate\View\View;

class ProductController extends Controller
{
    public function __construct(
        private CatalogWriteService $write,
        private CatalogSyncService $sync,
        private ProductMediaService $media,
    ) {}

    public function index(Request $request): View
    {
        $user = $request->user();
        $search = trim((string) $request->query('q', ''));
        $storeFilter = $request->query('store');
        $statusFilter = $request->query('status');

        $storeIds = WooStore::query()->where('user_id', $user->id)->pluck('id');

        $products = WooProduct::query()
            ->whereIn('woo_store_id', $storeIds)
            ->when($storeFilter, fn ($q) => $q->where('woo_store_id', $storeFilter))
            ->when($statusFilter, fn ($q) => $q->where('status', $statusFilter))
            ->when($search !== '', function ($query) use ($search) {
                $like = '%'.$search.'%';
                $query->where(function ($inner) use ($like) {
                    $inner->where('name', 'like', $like)
                        ->orWhere('sku', 'like', $like);
                });
            })
            ->with('store')
            ->latest('updated_at')
            ->paginate(20)
            ->withQueryString();

        $stores = WooStore::query()->where('user_id', $user->id)->orderBy('site_name')->get();

        return view('woo.products.index', compact('products', 'stores', 'search', 'storeFilter', 'statusFilter'));
    }

    public function create(Request $request): View
    {
        $stores = $this->activeStores($request);

        return view('woo.products.form', [
            'product' => new WooProduct(['status' => WooProduct::STATUS_DRAFT]),
            'stores' => $stores,
            'categories' => collect(),
        ]);
    }

    public function store(Request $request): RedirectResponse
    {
        $validated = $this->validateProduct($request);
        $store = $this->authorizedStore($request, (int) $validated['woo_store_id']);
        $validated['images'] = $this->media->buildImagesFromRequest($request, $store);

        $this->write->createProduct($store, $validated);

        return redirect()->route('woo.products.index', ['store' => $store->id])
            ->with('success', 'Product saved.');
    }

    public function edit(Request $request, WooProduct $product): View
    {
        $product->load('store');
        abort_if($product->store?->user_id !== $request->user()->id, 403);

        $stores = $this->activeStores($request);
        $categories = $product->store
            ? $product->store->categories()->orderBy('name')->get()
            : collect();

        return view('woo.products.form', compact('product', 'stores', 'categories'));
    }

    public function update(Request $request, WooProduct $product): RedirectResponse
    {
        $product->load('store');
        abort_if($product->store?->user_id !== $request->user()->id, 403);

        $validated = $this->validateProduct($request, $product);
        $validated['images'] = $this->media->buildImagesFromRequest($request, $product->store);
        $this->write->updateProduct($product, $validated);

        return redirect()->route('woo.products.index', ['store' => $product->woo_store_id])
            ->with('success', 'Product updated.');
    }

    public function sync(Request $request): RedirectResponse
    {
        $validated = $request->validate([
            'store' => ['required', 'integer'],
        ]);

        $store = $this->authorizedStore($request, (int) $validated['store']);
        $counts = $this->sync->syncAll($store);

        return back()->with('success', sprintf(
            'Synced %d categories and %d products from %s.',
            $counts['categories'],
            $counts['products'],
            $store->site_name ?? $store->site_url,
        ));
    }

    /** @return array<string, mixed> */
    private function validateProduct(Request $request, ?WooProduct $product = null): array
    {
        return $request->validate([
            'woo_store_id' => ['required', 'integer'],
            'name' => ['required', 'string', 'max:255'],
            'sku' => ['nullable', 'string', 'max:120'],
            'status' => ['required', Rule::in(array_keys(WooProduct::STATUSES))],
            'regular_price' => ['nullable', 'numeric', 'min:0'],
            'sale_price' => ['nullable', 'numeric', 'min:0'],
            'manage_stock' => ['sometimes', 'boolean'],
            'stock_quantity' => ['nullable', 'integer', 'min:0'],
            'short_description' => ['nullable', 'string', 'max:5000'],
            'description' => ['nullable', 'string', 'max:20000'],
            'category_external_ids' => ['nullable', 'array'],
            'category_external_ids.*' => ['integer', 'min:1'],
            'product_images' => ['nullable', 'string'],
            'featured_image_upload' => ['nullable', 'image', 'max:10240'],
            'featured_image_src' => ['nullable', 'url', 'max:2000'],
            'featured_image_alt' => ['nullable', 'string', 'max:255'],
            'gallery_uploads' => ['nullable', 'array'],
            'gallery_uploads.*' => ['image', 'max:10240'],
            'gallery_image_srcs' => ['nullable', 'array'],
            'gallery_image_srcs.*' => ['url', 'max:2000'],
        ]);
    }

    private function authorizedStore(Request $request, int $storeId): WooStore
    {
        return WooStore::query()
            ->where('user_id', $request->user()->id)
            ->whereKey($storeId)
            ->where('status', WooStore::STATUS_ACTIVE)
            ->firstOrFail();
    }

    /** @return \Illuminate\Support\Collection<int, WooStore> */
    private function activeStores(Request $request)
    {
        return WooStore::query()
            ->where('user_id', $request->user()->id)
            ->where('status', WooStore::STATUS_ACTIVE)
            ->orderBy('site_name')
            ->get();
    }
}