<?php

namespace App\Services\Smm;
use App\Services\Contracts\SmmPlatformInterface;
use Carbon\Carbon;
use Illuminate\Http\Request;
use \Facebook\Facebook;
use Illuminate\Support\Facades\Session;


use \Facebook\Exceptions\FacebookResponseException;
use \Facebook\Exceptions\FacebookSDKException;

class FacebookService implements SmmPlatformInterface
{
    public $fb = null;
    public $pageAccessToken = null;

    // 构造函数，传入配置信息
    public $configData = [];

    public function __construct($configData) {
        $this->configData = $configData;
        $this->fb = new Facebook([
            'app_id' => env('SSM_FACEBOOK_APP_ID'), // 替换为您的App ID
            'app_secret' => env('SSM_FACEBOOK_APP_SECRET'), // 替换为您的App Secret
            'default_graph_version' => 'v19.0', // 使用当前版本
        ]);
        //$this->pageAccessToken = $pageAccessToken;
    }

    /*
     * OAuth 2.0 授权登录
     * 返回授权地址：https://example.com/fb-callback.php
     */
    public function login()
    {
        session_start();
        // 实现Facebook登录逻辑
        $helper = $this->fb->getRedirectLoginHelper();
        $permissions = [
            'publish_video',
            'pages_manage_cta',
            'pages_show_list',
            'business_management',
            'pages_read_engagement',
            'pages_manage_metadata',
            'pages_read_user_content',
            'pages_manage_ads',
            'pages_manage_posts',
            'pages_manage_engagement',
        ];

        $loginUrl = $helper->getLoginUrl(env('DIST_SITE_URL').'/dist/callback/facebook', $permissions);

        return ['status'=>true, 'data' => ['url'=>$loginUrl]];
    }

    /*
     * OAuth 2.0 授权回调
     * 授权成功后，得到access_token，refresh_token等信息, 保存到数据库中
     * 授权成功后，返回回调需要的数据
     */


    public function loginCallback(Request $request)
    {
        $helper = $this->fb->getRedirectLoginHelper();

        if (isset($_GET['state'])) {
            // 由于session的原因，这里需要重新设置state
            $helper->getPersistentDataHandler()->set('state', $_GET['state']);
        }
        try {
            $accessToken = $helper->getAccessToken();
        } catch (Facebook\Exceptions\FacebookResponseException $e) {
            return ['status' => false, 'data' => 'Graph API错误：' . $e->getMessage()];
        } catch (Facebook\Exceptions\FacebookSDKException $e) {
            return ['status' => false, 'data' => 'SDK错误：' . $e->getMessage()];
        }
        if (isset($accessToken)) {
            // 可选：将短期令牌转换为长期令牌（有效期约60天）
            $oAuth2Client = $this->fb->getOAuth2Client();
            $longLivedAccessToken = $oAuth2Client->getLongLivedAccessToken($accessToken);
            $useriInfo = $this->getFacebookUser($longLivedAccessToken->getValue());
            if ($useriInfo['status'] == false) {
                return ['status' => false, 'data' => $useriInfo['data']];
            }
            $expiresAt = $longLivedAccessToken->getExpiresAt();
            //DateTime转 carbon
            if ($expiresAt != null) {
                $expiresAt = $expiresAt->format('Y-m-d H:i:s');
            } else {
                $expiresAt = Carbon::now()->addDays(60)->format('Y-m-d H:i:s');
            }
            //$expiresAt = $expiresAt->format('Y-m-d H:i:s');
            //保存到数据库中
            return ['status' => true, 'data' => ['accessToken' => $longLivedAccessToken->getValue(),'accessToken_expiresAt'=>$expiresAt,'userName'=>$useriInfo['data']['name'],'userId'=>$useriInfo['data']['id']]];
        } else {
            return ['status' => false, 'data' => '无法获取访问令牌'];
        }
    }

    /*
     * 发布图片，可以发多个图片
     * $imagePath = ['/path/to/image1.jpg','/path/to/image2.jpg'];
     */
    public function postImage($message,$imagePaths,$accessToken) {
        // 获取pageAccessToken
        $info = $this->getAccountsInfo($accessToken);
        if ($info['status'] == false) {
            return ['status' => false, 'data' => $info['data']];
        }

        try {
            $requestContent = [];
            $responseContent = [];
            $postIds = [];
            foreach ($info['data'] as $value) {
                $mediaIds  = [];
                $pageId = $value['id'];
                // 第一步：上传每张图片，获取 media_id
                foreach ($imagePaths as $imagePath){
                    //dd($imagePath);
                    $pageAccessToken = $value['pageAccessToken'];
                    $postData = [
                        'source' => $this->fb->fileToUpload($imagePath), // 上传图片文件
                      //  'source' => $imagePath, // 上传图片文件
                        'published' => false,                    // 添加描述
                    ];
                    $postUrl = '/'.$pageId.'/photos';

                    $response = $this->fb->post(
                        $postUrl,
                        $postData,
                        $pageAccessToken
                    );
                    $requestContent[] = ['postUrl'=>$postUrl,'data'=>$postData,'pageAccessToken'=>$pageAccessToken];
                    $responseContent[] = $response->getDecodedBody();
                    $mediaIds[] = $response->getDecodedBody()['id'];
                }

                // 第二步：发布帖子，附加多个 media_id
                $attachedMedia = array_map(function($id) {
                    return ['media_fbid' => $id];
                }, $mediaIds);

                $feedParams = [
                    'message' => $message,
                    'attached_media' => json_encode($attachedMedia)
                ];

                $postUrl = '/'.$pageId.'/feed';

                $response = $this->fb->post(
                    $postUrl,
                    $feedParams, $pageAccessToken
                );
                $requestContent[] = ['postUrl'=>$postUrl,'data'=>$feedParams,'pageAccessToken'=>$pageAccessToken];
                $responseContent[] = $response->getDecodedBody();
                $postIds[] = $response->getDecodedBody()['id'];
            }
            return ['status' => true, 'data' => ['responseIds' => $postIds,'requestContent'=>$requestContent,'responseContent'=>$responseContent]];
        } catch (Facebook\Exceptions\FacebookResponseException $e) {
            $errorMsg  = 'Graph API错误：' . $e->getMessage();
        } catch (Facebook\Exceptions\FacebookSDKException $e) {
            $errorMsg = 'SDK错误：' . $e->getMessage();
        }
        return ['status'=>false,'data' => $errorMsg];
    }


    /*
     * 发布视频，只能发一个视频
     */
    public function postVideo($message,$videoPath,$accessToken) {
        $info = $this->getAccountsInfo($accessToken);
        if ($info['status'] == false) {
            return ['status' => false, 'data' => $info['data']];
        }
        try {
            $postIds = [];
            $requestContent = [];
            $responseContent = [];
            foreach ($info['data'] as $value) {
                $pageId = $value['id'];
                $pageAccessToken = $value['pageAccessToken'];
                $data = [
                    'source' => $this->fb->fileToUpload($videoPath), // 上传图片文件
                    'description' => $message,                     // 添加描述
                ];
                $response = $this->fb->post(
                    '/'.$pageId.'/videos',
                    $data,
                    $pageAccessToken
                );
                $requestContent[] = ['url'=>'/'.$pageId.'/videos','data'=>$data,'pageAccessToken'=>$pageAccessToken];
                $responseContent[] = $response->getDecodedBody();
                $postIds[] = $response->getDecodedBody()['id'];
                //第二步：发布帖子，附加 media_id
            }
            return ['status' => true, 'data' => ['responseIds' => $postIds,'requestContent'=>$requestContent,'responseContent'=>$responseContent]];
        } catch (Facebook\Exceptions\FacebookResponseException $e) {
            $errorMsg = 'Graph API错误：' . $e->getMessage();
        } catch (Facebook\Exceptions\FacebookSDKException $e) {
            $errorMsg = 'SDK错误：' . $e->getMessage();
        }
        return ['status'=>false,'data' => $errorMsg];
    }

    public function getComments($postId) {

    }

    public function replyToComment($commentId) {

    }

    public function deleteComment($commentId) {

    }


    /**
     * 获取Facebook用户信息
     * @param string $accessToken
     * @return array [
     *     'name' => string,
     *     'id' => string,
     *     'error' => string|null
     * ]
     */
    public function getFacebookUser($accessToken)
    {
        try {
            // 验证并设置访问令牌
            $this->fb->setDefaultAccessToken($accessToken);
            // 发送请求获取用户信息
            $response = $this->fb->get('/me?fields=name,id');
            $userNode = $response->getGraphUser();
            return [
                'status' => true,
                'data' => [
                    'name' => $userNode->getName(),
                    'id' => $userNode->getId(),
                ]
            ];
        } catch (FacebookResponseException $e) {
            // API 响应错误处理
            $errorMsg = 'Graph API Error: ' . $e->getMessage();
        } catch (FacebookSDKException $e) {
            // SDK 错误处理
            $errorMsg = 'SDK Error: ' . $e->getMessage();
        } catch (Exception $e) {
            // 其他错误处理
            $errorMsg = 'General Error: ' . $e->getMessage();
        }
        return [
            'status' => false,
            'data' => $errorMsg
        ];
    }


    public function getAccountsInfo($accessToken) {
        try {
            // 验证并设置访问令牌
            $this->fb->setDefaultAccessToken($accessToken);
            // 发送请求获取用户信息
            $response = $this->fb->get('/me/accounts');
            $userNode = $response->getDecodedBody();
            if ($userNode['data'] == [] || $userNode['data'] == null || $userNode['data'] == '') {
                return [
                    'status' => false,
                    'data' => '没有获取到任何账号信息'
                ];
            }
            $data = [];
            foreach ($userNode['data'] as $value) {
                $data[] = [
                    'id' => $value['id'],
                    'name' => $value['name'],
                    'pageAccessToken' => $value['access_token'],
                ];
            }
            return [
                'status'=>true,
                'data' => $data
            ];
        } catch (FacebookResponseException $e) {
            // API 响应错误处理
            $errorMsg = 'Graph API Error: ' . $e->getMessage();
        } catch (FacebookSDKException $e) {
            // SDK 错误处理
            $errorMsg = 'SDK Error: ' . $e->getMessage();
        } catch (Exception $e) {
            // 其他错误处理
            $errorMsg = 'General Error: ' . $e->getMessage();
        }
        return [
            'status'=>false,
            'data' => $errorMsg
        ];
    }

}