<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Http\Requests\Admin\StoreCategoryRequest;
use App\Models\Category;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class CategoryController extends Controller
{
    public function index(Request $request): JsonResponse
    {
        $query = Category::query()->orderByDesc('sort_order')->orderBy('id');

        if ($type = $request->query('type')) {
            $query->where('type', $type);
        }

        if ($keyword = trim((string) $request->query('keyword', ''))) {
            $query->where(function ($q) use ($keyword) {
                $q->where('name', 'like', '%' . $keyword . '%')
                  ->orWhere('slug', 'like', '%' . $keyword . '%')
                  ->orWhere('description', 'like', '%' . $keyword . '%');
            });
        }

        $items = $query->get()->map(fn (Category $category) => $this->format($category))->values()->all();

        return response()->json([
            'code' => 0,
            'message' => 'ok',
            'data' => [
                'items' => $items,
            ],
        ]);
    }

    public function store(StoreCategoryRequest $request): JsonResponse
    {
        $category = Category::query()->create([
            'type' => $request->validated('type'),
            'name' => $request->validated('name'),
            'slug' => $request->validated('slug'),
            'description' => $request->validated('description', ''),
            'sort_order' => (int) $request->validated('sort_order', 0),
        ]);

        return response()->json([
            'code' => 0,
            'message' => 'category created',
            'data' => $this->format($category),
        ], 201);
    }

    public function update(StoreCategoryRequest $request, int $id): JsonResponse
    {
        $category = Category::query()->find($id);
        if (!$category) {
            return response()->json([
                'code' => 404,
                'message' => 'category not found',
                'data' => null,
            ], 404);
        }

        $category->fill([
            'type' => $request->validated('type'),
            'name' => $request->validated('name'),
            'slug' => $request->validated('slug'),
            'description' => $request->validated('description', ''),
            'sort_order' => (int) $request->validated('sort_order', 0),
        ]);
        $category->save();

        return response()->json([
            'code' => 0,
            'message' => 'category updated',
            'data' => $this->format($category),
        ]);
    }

    public function destroy(int $id): JsonResponse
    {
        $category = Category::query()->find($id);
        if (!$category) {
            return response()->json([
                'code' => 404,
                'message' => 'category not found',
                'data' => null,
            ], 404);
        }

        $category->packages()->detach();
        $category->delete();

        return response()->json([
            'code' => 0,
            'message' => 'category deleted',
            'data' => null,
        ]);
    }

    private function format(Category $category): array
    {
        return [
            'id' => $category->id,
            'type' => $category->type,
            'name' => $category->name,
            'slug' => $category->slug,
            'description' => $category->description,
            'sort_order' => (int) $category->sort_order,
            'package_count' => $category->packages()->count(),
            'created_at' => optional($category->created_at)->toAtomString(),
            'updated_at' => optional($category->updated_at)->toAtomString(),
        ];
    }
}