<?php

namespace App\Http\Controllers;

use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Cache;

/**
 * @group 通用接口
 */
class EnumController extends Controller
{
    /**
     * 获取枚举数据
     *
     * @queryParam enum string required 枚举类名称,例如:UserType,OrderStatus等 Example: UserType
     *
     * @response 200 {
     *     "items": [
     *       {
     *         "label": "普通用户",
     *         "value": 1
     *       },
     *       {
     *         "label": "VIP用户",
     *         "value": 2
     *       }
     *     ],
     *     "message": "",
     *     "code": 0
     * }
     *
     * @response 400 {
     *     "items": [],
     *     "message": "枚举名称不能为空",
     *     "code": 400
     * }
     *
     * @response 404 {
     *     "items": [],
     *     "message": "枚举类不存在",
     *     "code": 404
     * }
     */
    public function getEnumData(Request $request): JsonResponse
    {
        $enumName = $request->input('enum');

        if (empty($enumName)) {
            return response()->json([
                'items' => [],
                'message' => '枚举名称不能为空',
                'code' => 400
            ]);
        }

        // 从Memcached缓存获取数据
        $cacheKey = "enum:{$enumName}";
        $enumData = Cache::get($cacheKey);

        if (!$enumData) {
            // 构造完整的枚举类名
            $enumClass = "App\\Enums\\{$enumName}";
            // 检查类是否存在
            if (!class_exists($enumClass)) {
                return response()->json([
                    'items' => [],
                    'message' => "枚举类 {$enumName} 不存在",
                    'code' => 404
                ]);
            }
            // 缓存不存在，获取枚举数据并转换格式
            $rawData = $enumClass::all();
            $items = [];
            foreach ($rawData as $value => $label) {
                $items[] = [
                    'label' => $label,
                    'value' => $value
                ];
            }

            // 存入Memcached缓存,设置过期时间为1天
            Cache::put($cacheKey, $items, 86400);
            $enumData = $items;
        }

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