<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Category;
use App\Models\Product;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Str;
use Illuminate\View\View;

class ProductController extends Controller
{
    /**
     * Display a listing of products.
     */
    public function index(Request $request): View
    {
        $tab = $request->query('tab', 'all');
        $query = Product::with(['category', 'makerworldCollection'])->latest();

        if ($tab === 'published') {
            $query->where(function ($q) {
                $q->where('status', 'published')
                    ->orWhereNull('status');
            });
        } elseif ($tab === 'draft') {
            $query->where('status', 'draft');
        } elseif ($tab === 'makerworld') {
            $query->whereNotNull('makerworld_id');
        }

        if ($request->filled('q')) {
            $q = $request->input('q');
            $query->where(function ($w) use ($q) {
                $w->where('name', 'like', "%{$q}%")
                    ->orWhere('description', 'like', "%{$q}%")
                    ->orWhere('makerworld_id', 'like', "%{$q}%");
            });
        }

        if ($request->filled('category_id')) {
            $query->where('category_id', $request->input('category_id'));
        }

        $totalAll = Product::count();
        $totalPublished = Product::where('status', 'published')->orWhereNull('status')->count();
        $totalDraft = Product::where('status', 'draft')->count();
        $totalMakerWorld = Product::whereNotNull('makerworld_id')->count();

        $products = $query->paginate(20)->withQueryString();
        $categories = Category::all();

        return view('admin.products.index', compact(
            'products',
            'categories',
            'tab',
            'totalAll',
            'totalPublished',
            'totalDraft',
            'totalMakerWorld'
        ));
    }

    /**
     * Show the form for creating a new product.
     */
    public function create(): View
    {
        $categories = Category::all();

        return view('admin.products.create', compact('categories'));
    }

    /**
     * Store a newly created product in storage.
     */
    public function store(Request $request): RedirectResponse
    {
        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'category_id' => 'required|exists:categories,id',
            'base_price' => 'required|numeric|min:0.01',
            'short_description' => 'nullable|string|max:500',
            'description' => 'required|string',
            'image_url' => 'nullable|string|max:2048',
            'gallery_images' => 'nullable|array',
            'gallery_images.*' => 'nullable|string|max:2048',
            'dimensions' => 'nullable|string|max:100',
            'weight_grams' => 'nullable|integer|min:0',
            'print_time_hours' => 'nullable|numeric|min:0',
            'is_featured' => 'nullable|boolean',
            'is_active' => 'nullable|boolean',
        ]);

        $validated['slug'] = Str::slug($validated['name']);
        $validated['is_featured'] = $request->boolean('is_featured');
        $validated['is_active'] = $request->boolean('is_active');
        $validated['gallery_images'] = $this->cleanGalleryImages($request->input('gallery_images', []), $validated['image_url'] ?? null);
        $validated['available_materials'] = ['pla', 'petg', 'silk', 'tpu'];
        $validated['available_colors'] = [
            'Zon Geel (Pikachu)', 'Vurig Rood (Charizard)', 'Hemelsblauw (Squirtle)',
            'Muntgroen (Bulbasaur)', 'Spooky Paars (Gengar)', 'Koper Zijdeglans',
            'Regenboog Multi-Color', 'Mat Zwart', 'Sneeuwwit',
        ];

        Product::create($validated);

        return redirect()->route('admin.products.index')
            ->with('success', "Product '{$validated['name']}' is succesvol aangemaakt!");
    }

    /**
     * Show the form for editing the specified product.
     */
    public function edit(Product $product): View
    {
        $categories = Category::all();

        return view('admin.products.edit', compact('product', 'categories'));
    }

    /**
     * Update the specified product in storage.
     */
    public function update(Request $request, Product $product): RedirectResponse
    {
        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'category_id' => 'required|exists:categories,id',
            'base_price' => 'required|numeric|min:0.01',
            'short_description' => 'nullable|string|max:500',
            'description' => 'required|string',
            'image_url' => 'nullable|string|max:2048',
            'gallery_images' => 'nullable|array',
            'gallery_images.*' => 'nullable|string|max:2048',
            'dimensions' => 'nullable|string|max:100',
            'weight_grams' => 'nullable|integer|min:0',
            'print_time_hours' => 'nullable|numeric|min:0',
            'is_featured' => 'nullable|boolean',
            'is_active' => 'nullable|boolean',
        ]);

        $validated['is_featured'] = $request->boolean('is_featured');
        $validated['is_active'] = $request->boolean('is_active');
        $validated['gallery_images'] = $this->cleanGalleryImages($request->input('gallery_images', []), $validated['image_url'] ?? null);

        $product->update($validated);

        return redirect()->route('admin.products.index')
            ->with('success', "Product '{$product->name}' is succesvol bijgewerkt!");
    }

    /**
     * Handle image upload for product gallery / cover.
     */
    public function uploadImage(Request $request): JsonResponse
    {
        $request->validate([
            'image' => 'required|image|mimes:jpeg,png,jpg,webp,gif|max:8192',
        ]);

        $path = $request->file('image')->store('products', 'public');
        $url = '/storage/'.$path;

        return response()->json([
            'success' => true,
            'url' => $url,
        ]);
    }

    /**
     * Sanitize and filter gallery images.
     *
     * @param  array<int, mixed>  $images
     * @return array<int, string>
     */
    protected function cleanGalleryImages(array $images, ?string $coverUrl = null): array
    {
        $clean = [];
        foreach ($images as $img) {
            $img = trim((string) $img);
            if ($img !== '' && $img !== $coverUrl && ! in_array($img, $clean, true)) {
                $clean[] = $img;
            }
        }

        return $clean;
    }

    /**
     * Remove the specified product from storage.
     */
    public function destroy(Product $product): RedirectResponse
    {
        $name = $product->name;
        $product->delete();

        return redirect()->route('admin.products.index')
            ->with('success', "Product '{$name}' is verwijderd.");
    }
}