<?php

namespace App\Module\AppGame\Tools;

use App\Module\AppGame\Events\ProtobufResponseEvent;
use Google\Protobuf\Internal\Message;
use Illuminate\Support\Facades\Event;
use Uraus\Kku\Response;


/**
 * protobuf 助手函数
 *
 */
class Protobuf
{

    /**
     * 进行 Response返回类型处理
     * @param Response $response
     * @return \Illuminate\Contracts\Routing\ResponseFactory|\Illuminate\Foundation\Application|\Illuminate\Http\JsonResponse|\Illuminate\Http\Response|object
     */
    public static function response(Response $response)
    {
        $httpRequest = request();
        // 触发 ProtobufResponse 返回前事件
        Event::dispatch(new ProtobufResponseEvent($response));

        // 根据请求的 Accept 头决定响应格式
        $acceptHeader = $httpRequest->header('Accept');
        $contentType = $httpRequest->header('Content-Type');
        $ContentTypeBase64 = $httpRequest->header('Content-Type-Base64', 0);
        $ContentTypeBin = $httpRequest->header('Content-Type-Bin', 0);
        $forceJson = $httpRequest->header('Force-Json', 0);

        // 记录响应信息，便于调试
        \Illuminate\Support\Facades\Log::debug('Proto响应信息', [
            'Accept' => $acceptHeader,
            'Content-Type' => $contentType,
            'Content-Type-Base64' => $ContentTypeBase64,
            'Content-Type-Bin' => $ContentTypeBin,
            'Force-Json' => $forceJson,
            'response_size' => strlen($response->serializeToString()),
            'response_json_size' => strlen($response->serializeToJsonString())
        ]);
        \Illuminate\Support\Facades\Log::debug('Proto响应信息-json', json_decode($response->serializeToJsonString(),true));
        // 强制返回JSON格式（用于调试或客户端不支持二进制解析时）
        if ($forceJson) {
            return response()->json(
                self::protobufToArray($response)
            )->header('Content-Type', 'application/json');
        }

        // 返回Base64编码的Protobuf数据
        if ($ContentTypeBase64) {
            $base64Data = base64_encode($response->serializeToString());
            return response($base64Data)
                ->header('Content-Type', 'text/plain');
        }

        // 返回JSON格式（当客户端请求JSON或发送JSON请求时）
        if ($ContentTypeBin == 0) {
            if (stripos($acceptHeader, 'json') !== false || stripos($contentType, 'json') !== false) {
                return response()->json(
                    self::protobufToArray($response)
                );
            }
        }

        // 返回二进制Protobuf格式（默认）
        $binaryData = $response->serializeToString();
        return response($binaryData)
            ->header('Content-Type', 'application/x-protobuf');
    }

    /**
     * 将 Protobuf 消息对象转换为数组
     * @param Message $message Protobuf 消息对象
     * @return array
     */
    protected static function protobufToArray(Message $message): array
    {
        $json = $message->serializeToJsonString();
        return json_decode($json, true);
    }

}