<?php

namespace App\Http\Controllers\Woo;

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

class ProductController extends Controller
{
    use ResolvesWooContext;

    public function __construct(
        private CatalogWriteService $write,
        private CatalogSyncService $sync,
        private ProductMediaService $media,
        private SubscriptionService $subscriptions,
    ) {}

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

        $products = WooProduct::query()
            ->when($store, fn ($q) => $q->where('woo_store_id', $store->id))
            ->when(! $store, fn ($q) => $q->whereRaw('1 = 0'))
            ->when($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();

        return view('woo.products.index', [
            'products' => $products,
            'currentStore' => $store,
            'search' => $search,
            'statusFilter' => $statusFilter,
            'productCount' => $this->subscriptions->productCount($user),
            'productLimit' => $this->subscriptions->isPro($user) ? null : (int) config('woo.free.max_products', 20),
        ]);
    }

    public function create(Request $request): View|RedirectResponse
    {
        $user = $this->accountUser($request);
        $store = $this->currentStoreOrFail($request);

        if (! $this->subscriptions->canCreateProduct($user)) {
            return redirect()->route('woo.pro.index')
                ->with('upsell', 'You have reached the free plan limit of '.(int) config('woo.free.max_products', 20).' products. Upgrade to Pro for unlimited products.');
        }

        return view('woo.products.form', [
            'product' => new WooProduct(['status' => WooProduct::STATUS_DRAFT, 'woo_store_id' => $store->id]),
            'currentStore' => $store,
            'categories' => $store->categories()->orderBy('name')->get(),
        ]);
    }

    public function store(Request $request): RedirectResponse
    {
        $user = $this->accountUser($request);
        $store = $this->currentStoreOrFail($request);

        if (! $this->subscriptions->canCreateProduct($user)) {
            return redirect()->route('woo.pro.index')
                ->with('upsell', 'You have reached the free plan limit of '.(int) config('woo.free.max_products', 20).' products. Upgrade to Pro for unlimited products.');
        }

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

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

        return redirect()->route('woo.products.index')
            ->with('success', 'Product saved.');
    }

    public function edit(Request $request, WooProduct $product): View
    {
        $store = $this->currentStoreOrFail($request);
        abort_if($product->woo_store_id !== $store->id, 404);

        return view('woo.products.form', [
            'product' => $product,
            'currentStore' => $store,
            'categories' => $store->categories()->orderBy('name')->get(),
        ]);
    }

    public function update(Request $request, WooProduct $product): RedirectResponse
    {
        $store = $this->currentStoreOrFail($request);
        abort_if($product->woo_store_id !== $store->id, 404);

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

        return redirect()->route('woo.products.index')
            ->with('success', 'Product updated.');
    }

    public function sync(Request $request): RedirectResponse
    {
        $store = $this->currentStoreOrFail($request);
        $user = $this->accountUser($request);
        $counts = $this->sync->syncAll($store, $user);

        $message = sprintf(
            'Synced %d categories and %d products from %s.',
            $counts['categories'],
            $counts['products'],
            $store->site_name ?? $store->site_url,
        );

        if (! $this->subscriptions->isPro($user) && $this->subscriptions->productCount($user) >= (int) config('woo.free.max_products', 20)) {
            $message .= ' Free plan is limited to '.(int) config('woo.free.max_products', 20).' products — upgrade to Pro to sync your full catalog.';
        }

        return back()->with('success', $message);
    }

    /** @return array<string, mixed> */
    private function validateProduct(Request $request, $store, ?WooProduct $product = null): array
    {
        return array_merge($request->validate([
            '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'],
        ]), [
            'woo_store_id' => $store->id,
        ]);
    }
}