<?php

namespace app\common\service;

/**
 * 腾讯云IM服务类
 * Class TencentImService
 * @package app\common\service
 */
class TencentImService
{
    private $sdkAppId;
    private $secretKey;
    private $adminIdentifier = 'administrator'; // 管理员账号
    
    public function __construct()
    {
        $config = config('project.trtc');
        $this->sdkAppId = $config['sdkAppId'];
        $this->secretKey = $config['secretKey'];
        
        \think\facade\Log::info('TencentImService初始化 - sdkAppId: ' . $this->sdkAppId . ', secretKey长度: ' . strlen($this->secretKey));
    }
    
    /**
     * @notes 生成UserSig（使用腾讯云官方算法）
     * @param string $userId
     * @param int $expire
     * @return string|false
     */
    private function generateUserSig(string $userId, int $expire = 86400)
    {
        try {
            $api = new TLSSigAPIv2($this->sdkAppId, $this->secretKey);
            $userSig = $api->genUserSig($userId, $expire);
            
            \think\facade\Log::info('UserSig生成成功 - userId: ' . $userId . ', sig长度: ' . strlen($userSig));
            
            return $userSig;
        } catch (\Exception $e) {
            \think\facade\Log::error('生成UserSig失败: ' . $e->getMessage());
            return false;
        }
    }
    
    /**
     * @notes 导入单个账号到IM
     * @param string $userId 用户ID
     * @param string $nick 昵称（可选）
     * @param string $faceUrl 头像URL（可选）
     * @return array|false
     */
    public function importAccount(string $userId, string $nick = '', string $faceUrl = '')
    {
        try {
            \think\facade\Log::info('开始导入IM账号 - userId: ' . $userId . ', nick: ' . $nick . ', sdkAppId: ' . $this->sdkAppId);
            
            // 生成管理员UserSig
            $adminUserSig = $this->generateUserSig($this->adminIdentifier);
            
            if (!$adminUserSig) {
                throw new \Exception('生成管理员UserSig失败');
            }
            
            \think\facade\Log::info('管理员UserSig生成成功');
            
            // 构建请求URL
            $random = rand(0, 4294967295);
            $url = sprintf(
                'https://console.tim.qq.com/v4/im_open_login_svc/account_import?sdkappid=%s&identifier=%s&usersig=%s&random=%s&contenttype=json',
                $this->sdkAppId,
                $this->adminIdentifier,
                urlencode($adminUserSig),
                $random
            );
            
            \think\facade\Log::info('请求URL构建完成');
            
            // 构建请求体
            $data = [
                'UserID' => $userId
            ];
            
            if ($nick) {
                $data['Nick'] = $nick;
            }
            
            if ($faceUrl) {
                $data['FaceUrl'] = $faceUrl;
            }
            
            \think\facade\Log::info('请求数据: ' . json_encode($data, JSON_UNESCAPED_UNICODE));
            
            // 发送请求
            $result = $this->httpPost($url, json_encode($data));
            
            \think\facade\Log::info('HTTP响应: ' . substr($result, 0, 500));
            
            if (!$result) {
                throw new \Exception('请求失败：无响应');
            }
            
            $response = json_decode($result, true);
            
            if (!$response) {
                throw new \Exception('响应解析失败：' . substr($result, 0, 200));
            }
            
            \think\facade\Log::info('响应解析成功: ' . json_encode($response, JSON_UNESCAPED_UNICODE));
            
            // 检查响应状态
            if ($response['ActionStatus'] !== 'OK') {
                $errorMsg = sprintf(
                    '导入账号失败 - ErrorCode: %s, ErrorInfo: %s',
                    $response['ErrorCode'] ?? 'unknown',
                    $response['ErrorInfo'] ?? '未知错误'
                );
                throw new \Exception($errorMsg);
            }
            
            return [
                'success' => true,
                'userId' => $userId,
                'message' => '账号导入成功'
            ];
            
        } catch (\Exception $e) {
            $errorMsg = sprintf(
                '导入IM账号失败 - userId: %s, error: %s',
                $userId,
                $e->getMessage()
            );
            \think\facade\Log::error($errorMsg);
            
            return [
                'success' => false,
                'userId' => $userId,
                'message' => $e->getMessage()
            ];
        }
    }
    
    /**
     * @notes 批量导入账号
     * @param array $accounts 账号列表 [['userId' => 'xxx', 'nick' => 'xxx', 'faceUrl' => 'xxx'], ...]
     * @return array
     */
    public function batchImportAccounts(array $accounts): array
    {
        $results = [];
        
        foreach ($accounts as $account) {
            $userId = $account['userId'] ?? '';
            $nick = $account['nick'] ?? '';
            $faceUrl = $account['faceUrl'] ?? '';
            
            if (!$userId) {
                continue;
            }
            
            $result = $this->importAccount($userId, $nick, $faceUrl);
            $results[] = $result;
        }
        
        return $results;
    }
    
    /**
     * @notes 删除账号
     * @param array $userIds 用户ID列表
     * @return array|false
     */
    public function deleteAccounts(array $userIds)
    {
        try {
            // 生成管理员UserSig
            $adminUserSig = $this->generateUserSig($this->adminIdentifier);
            
            if (!$adminUserSig) {
                throw new \Exception('生成管理员UserSig失败');
            }
            
            // 构建请求URL
            $random = rand(0, 4294967295);
            $url = sprintf(
                'https://console.tim.qq.com/v4/im_open_login_svc/account_delete?sdkappid=%s&identifier=%s&usersig=%s&random=%s&contenttype=json',
                $this->sdkAppId,
                $this->adminIdentifier,
                urlencode($adminUserSig),
                $random
            );
            
            // 构建请求体
            $data = [
                'DeleteItem' => array_map(function($userId) {
                    return ['UserID' => $userId];
                }, $userIds)
            ];
            
            // 发送请求
            $result = $this->httpPost($url, json_encode($data));
            
            if (!$result) {
                throw new \Exception('请求失败');
            }
            
            $response = json_decode($result, true);
            
            if (!$response) {
                throw new \Exception('响应解析失败');
            }
            
            // 检查响应状态
            if ($response['ActionStatus'] !== 'OK') {
                throw new \Exception($response['ErrorInfo'] ?? '删除账号失败');
            }
            
            return [
                'success' => true,
                'message' => '账号删除成功'
            ];
            
        } catch (\Exception $e) {
            \think\facade\Log::error('删除IM账号失败', [
                'userIds' => $userIds,
                'error' => $e->getMessage()
            ]);
            
            return [
                'success' => false,
                'message' => $e->getMessage()
            ];
        }
    }
    
    /**
     * 拉取单聊（C2C）漫游消息
     * @see https://cloud.tencent.com/document/product/269/2739
     *
     * @param string $operatorAccount 会话一方 UserID（如 doctor_1）
     * @param string $peerAccount     会话另一方 UserID（如 patient_2）
     * @return array{success:bool,msgList:array,complete:int,lastMsgKey:?string,lastMsgTime:?int,error:string,rawErrorCode:int}
     */
    public function adminGetRoamMsg(
        string $operatorAccount,
        string $peerAccount,
        int $maxCnt = 100,
        int $minTime = 0,
        int $maxTime = 4294967295,
        ?string $lastMsgKey = null,
        ?int $lastMsgTime = null
    ): array {
        $empty = [
            'success' => false,
            'msgList' => [],
            'complete' => 1,
            'lastMsgKey' => null,
            'lastMsgTime' => null,
            'error' => '',
            'rawErrorCode' => 0,
        ];
        try {
            $adminUserSig = $this->generateUserSig($this->adminIdentifier);
            if (!$adminUserSig) {
                $empty['error'] = '生成管理员UserSig失败';
                return $empty;
            }
            $random = rand(0, 4294967295);
            $url = sprintf(
                'https://console.tim.qq.com/v4/openim/admin_getroammsg?sdkappid=%s&identifier=%s&usersig=%s&random=%s&contenttype=json',
                $this->sdkAppId,
                $this->adminIdentifier,
                urlencode($adminUserSig),
                $random
            );
            $data = [
                'Operator_Account' => $operatorAccount,
                'Peer_Account' => $peerAccount,
                'MaxCnt' => $maxCnt,
                'MinTime' => $minTime,
                'MaxTime' => $maxTime,
            ];
            if ($lastMsgKey !== null && $lastMsgKey !== '') {
                $data['LastMsgKey'] = $lastMsgKey;
            }
            if ($lastMsgTime !== null && $lastMsgTime > 0) {
                $data['LastMsgTime'] = $lastMsgTime;
            }
            $result = $this->httpPost($url, json_encode($data), 30);
            if (!$result) {
                $empty['error'] = 'IM接口无响应';
                return $empty;
            }
            $response = json_decode($result, true);
            if (!$response) {
                $empty['error'] = 'IM响应解析失败';
                return $empty;
            }
            $code = (int)($response['ErrorCode'] ?? -1);
            $empty['rawErrorCode'] = $code;
            if (($response['ActionStatus'] ?? '') !== 'OK') {
                $empty['error'] = $response['ErrorInfo'] ?? ('ErrorCode ' . $code);
                return $empty;
            }
            $msgList = $response['MsgList'] ?? [];
            if (!is_array($msgList)) {
                $msgList = [];
            }
            return [
                'success' => true,
                'msgList' => $msgList,
                'complete' => (int)($response['Complete'] ?? 1),
                'lastMsgKey' => $response['LastMsgKey'] ?? null,
                'lastMsgTime' => isset($response['LastMsgTime']) ? (int)$response['LastMsgTime'] : null,
                'error' => '',
                'rawErrorCode' => $code,
            ];
        } catch (\Exception $e) {
            $empty['error'] = $e->getMessage();
            return $empty;
        }
    }

    /**
     * @notes 发送HTTP POST请求
     * @param string $url
     * @param string $data
     * @return string|false
     */
    private function httpPost(string $url, string $data, int $timeout = 10)
    {
        $ch = curl_init();
        
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Content-Type: application/json',
            'Content-Length: ' . strlen($data)
        ]);
        
        $result = curl_exec($ch);
        $error = curl_error($ch);
        
        curl_close($ch);
        
        if ($error) {
            \think\facade\Log::error('HTTP请求失败', [
                'url' => $url,
                'error' => $error
            ]);
            return false;
        }
        
        return $result;
    }
}