<?php

namespace App\Http\Controllers\Admin;

use App\DataTables\ProductsDataTable;
use App\Http\Controllers\Controller;
use App\Models\Category;
use App\Models\Product;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\Rule;

class ProductController extends Controller
{
    public function __construct()
    {
        $this->middleware('permission:manage products');
    }

    public function index(ProductsDataTable $dataTable)
    {
        $categories = Category::doesntHave('children')
            ->where('type', Product::class)
            ->select('id', 'name')
            ->get();

        return $dataTable->render('admin.products.index', compact('categories'));
    }

    public function create(Request $request)
    {
        $request->validate([
            'category' => ['required', Rule::exists('categories', 'id')->where(function ($query) {
                return $query->where('type', Product::class);
            })],
        ]);

        $category = Category::findOrFail($request->category);

        if ($category->children()->count()) {
            return redirect()->route('admin.products.selectCategory');
        }

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

    public function edit(Product $product)
    {
        if ($product->categories()->count() == 0) {
            return redirect()->route('admin.products.selectCategory', ['product' => $product->id]);
        }

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

    public function destroy(Product $product)
    {
        DB::transaction(function () use ($product) {
            $product->categories()->detach();
            $product->comments()->delete();
            $product->favorites()->delete();
            $product->images()->delete();
            $product->delete();
        });

        $this->doneMessage("{$product->name} حذف شد");

        return back();
    }

    public function selectCategory(Request $request)
    {
        $request->validate(['product' => 'nullable|exists:products,id']);

        $categories = Category::select('id', 'name', 'slug')
            ->withCount('activeChildren')
            ->whereNull('parent_id')
            ->where('type', Product::class)
            ->get();

        $product = null;

        if ($request->product) {
            $product = Product::findOrFail($request->product);
        }

        return view('admin.products.select-category', compact('categories', 'product'));
    }
}