<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Category;
use App\Services\CategoryService;
use Illuminate\Http\Request;
use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;

class CategoryController extends Controller
{
    public function index(Request $request)
    {
        $query = Category::query();

        if ($request->has('active')) {
            $query->where('active', (int) $request->active);
        }

        if ($request->boolean('select_only')) {
            $query->where('show_in_select', 1);
        }

        if ($request->filled('search')) {
            $query->where('name', 'like', '%' . $request->search . '%');
        }

        $categories = $query
            ->orderBy('sort_order')
            ->orderBy('id')
            ->get();

        return response()->json($categories);
    }

    public function store(Request $request)
    {
        $name = trim((string) $request->input('name'));

        if ($name === '') {
            throw new UnprocessableEntityHttpException('نام دسته‌بندی الزامی است');
        }

        if (Category::where('name', $name)->exists()) {
            throw new UnprocessableEntityHttpException('این دسته‌بندی قبلا ثبت شده است');
        }

        $maxOrder = (int) Category::max('sort_order');

        $category = Category::create([
            'name' => $name,
            'active' => $request->has('active') ? (int) $request->active : 1,
            'show_in_filter' => $request->has('show_in_filter') ? (int) $request->show_in_filter : 1,
            'show_in_select' => $request->has('show_in_select') ? (int) $request->show_in_select : 1,
            'sort_order' => $maxOrder + 1,
        ]);

        return response()->json($category);
    }

    public function update(Request $request, $id)
    {
        $category = Category::findOrFail($id);

        if ($request->has('name')) {
            $name = trim((string) $request->input('name'));
            if ($name === '') {
                throw new UnprocessableEntityHttpException('نام دسته‌بندی الزامی است');
            }
            if (Category::where('name', $name)->where('id', '!=', $id)->exists()) {
                throw new UnprocessableEntityHttpException('این نام قبلا ثبت شده است');
            }
            $category->name = $name;
        }

        foreach (['active', 'show_in_filter', 'show_in_select', 'sort_order'] as $field) {
            if ($request->has($field)) {
                $category->{$field} = $field === 'sort_order'
                    ? (int) $request->input($field)
                    : (int) $request->input($field);
            }
        }

        $category->save();

        return response()->json($category);
    }

    public function syncFromProducts(CategoryService $categoryService)
    {
        $created = $categoryService->syncFromProducts();

        return response()->json([
            'message' => $created > 0
                ? "{$created} دسته‌بندی از محصولات اضافه شد"
                : 'دسته‌بندی جدیدی برای افزودن نبود',
            'created' => $created,
            'items' => Category::query()->orderBy('sort_order')->orderBy('id')->get(),
        ]);
    }

    /** تب فیلتر اپ کاربر */
    public function clientIndex(Request $request)
    {
        $query = Category::query()
            ->where('active', 1)
            ->where('show_in_filter', 1);

        if ($request->filled('search')) {
            $query->where('name', 'like', '%' . $request->search . '%');
        }

        $categories = $query
            ->orderBy('sort_order')
            ->orderBy('id')
            ->get(['id', 'name', 'sort_order']);

        return response()->json($categories);
    }

    public function changeActive($id, $active)
    {
        $active = (int) $active;

        if (! in_array($active, [0, 1], true)) {
            throw new UnprocessableEntityHttpException('وضعیت active نامعتبر است');
        }

        $category = Category::findOrFail($id);
        $category->active = $active;
        $category->save();

        return response()->json([
            'message' => $active ? 'نمایش محصولات این دسته فعال شد' : 'نمایش محصولات این دسته غیرفعال شد',
            'data' => $category,
        ]);
    }
}