<?php

if (!defined('IN_ONLINE')) {
    exit('Access Denied');
}

/**
 * Description of dms_edoc
 *
 * @author Administrator
 */
class dms_edoc {
    private static $cachedToken = null;
    private static $tokenExpiryTime = 0;
    private static $oceanMapping = [
                'P'      => 'PKL',
                'QO'     => 'QOF',
                'Z'      => '',
                'S'      => 'ISF',
                'H'      => 'HBL',
                'CON'    => 'CON',
                'M'      => 'MBL',
                'O'      => 'DOR',
                'PU'     => '',
                'C'      => 'CRD',
                'F'      => 'FRL',
                'D'      => 'OTH',
                'RUT'    => 'INS',
                'CNEEA'  => '',
                'MF1'    => 'CMS',
                'CNEEV'  => '',
                'A'      => 'ARN',
                'COO'    => 'COO',
                'I'      => 'CIV',
                'V'      => '',
                'B'      => 'OTH',
                'CRD'    => 'CUD',
                'BC'     => 'BCF',
                'DCIV'   => 'CIV',
                'DPKGLIST' => 'PKL',
                'TIV'    => 'DBN',
                'MIV'    => '',
                'DA'     => 'DLA',
                'CPV'    => '',
                'BE'     => 'BOE',
                'Q'      => 'QOF',
                'SO'     => 'SSO',
                'WCR'    => 'WCR',
                'DG'     => 'DGC',
                'PL-LEN' => '',
                'CCO'    => 'CCO',
                'DN'     => 'DBN',
                'NPRS'   => 'NPS',
                'SOP'    => 'SOP',
                'TD'     => 'TAX',
                'BI'     => 'BIS',
                'CRL'    => 'CUR',
                'PRF'    => 'PRF',
                'SCIV'   => 'SCV',
                'JC'     => 'PNL',
                'TELEX'  => 'TLX',
                'CN'     => 'CRN',
                'DGD'    => 'DGC',
                'CPS'    => 'CPS',
                'SPIV'   => 'SIV',
                'CSI'    => 'CSI',
                'MSTY'   => 'DGC',
                'CLP'    => 'CLP',
                'DD'     => 'DND',
                'PA'     => 'PAL',
                'JS'     => 'IBI',
                'TCR'    => 'TCR',
                'T'      => '',
                'OFT'    => 'OFT',
                'CM'     => 'PCD',
                'DUT'    => 'DUT',
                'EIR'    => 'EIR',
                'MS'     => 'BMS',
                'ECLR'   => 'ECL',
                'CPA'    => 'CPA',
                'SOC'    => 'SOC',
                'CP'     => 'CPG',
                'PSJS'   => 'FRL',
                'CI'     => 'SIV',
                'CPC'    => 'CPC',
                'DBL'    => 'DBL',
                'PNL'    => 'PNL',
                'POD'    => 'POD',
                'MD'     => 'DES',
                'SWB'    => 'HBL',
                'SC'     => 'SCC',
                'TO'     => 'TSO',
                'WO'     => 'TSO',
                'DR'     => 'DKR',
                'RM'     => '',
                'FCR'    => 'FCR',
                'BS'     => 'BSL',
                'TM'     => '',
                'FCLP'   => 'CLP',
                'SRD'    => 'SRD',
                'SLI'    => 'SLI',
                'SSI'    => 'SSI',
                'VGM'    => 'VGM',
                'SLG'    => 'SLG',
                'ICLR'   => 'ICL',
            ];

    private static $airMapping = [
            'M'        => 'MBL',
            'H'        => 'HBL',
            'S'        => 'ISF',
            'DG'       => 'DGC',
            'CRL'      => 'CUR',
            'O'        => 'DOR',
            'D'        => 'OTH',
            'TD'       => 'TAX',
            'T'        => 'CRD',
            'C'        => '',
            'SOP'      => 'SOP',
            'CCO'      => 'CCO',
            'A'        => 'ARN',
            'MF'       => '',
            'F'        => 'FRL',
            'BE'       => 'BOE',
            'NPRS'     => 'NPS',
            'FCR'      => 'FCR',
            'VGM'      => 'VGM',
            'CON'      => 'CON',
            'JS'       => 'IBI',
            'HB'       => 'HBL',
            'SPIV'     => 'SIV',
            'WCR'      => 'WCR',
            'APRHB'    => 'HBL',
            'B'        => 'OTH',
            'TCR'      => 'TCR',
            'CLP'      => 'CLP',
            'MAB'      => 'MBL',
            'DAB'      => 'DBL',
            'TELEX'    => 'TLX',
            'I'        => 'o',
            'P'        => 'PKL',
            'SLG'      => 'SLG',
            'QO'       => 'QOF',
            'SC'       => 'SCC',
            'CPV'      => 'PRF',
            'SO'       => 'SSO',
            'FCLP'     => 'CLP',
            'PNL'      => 'dg',
            'TM'       => '',
            'MSTY'     => 'DGC',
            'POD'      => 'POD',
            'DR'       => 'DKR',
            'RM'       => '',
            'DBL'      => 'DBL',
            'CSI'      => 'CSI',
            'ICLR'     => 'ICL',
            'ECLR'     => 'ECL',
            'MD'       => 'DES',
            'CP'       => 'CPG',
            'CPS'      => 'CPS',
            'CPA'      => 'CPA',
            'CPC'      => 'CPC',
            'TO'       => 'TSO',
            'SCIV'     => 'SCV',
            'PR'       => 'PRF',
            'DA'       => 'DLA',
            'MS'       => 'BMS',
            'DGD'      => 'DGC',
            'PLLEN'    => '',
            'SLI'      => 'SLI',
            'MIV'      => '',
            'PSJS'     => 'FRL',
            'TIV'      => 'DBN',
            'DPKGLIST' => 'PKL',
            'DCIV'     => 'CIV',
            'BC'       => 'BCF',
            'SWB'      => 'HBL',
            'SSI'      => 'SSI',
            'BI'       => 'BIS',
            'JC'       => 'PNL',
            'AL'       => 'ALL',
            'BS'       => 'BSL',
            'WO'       => 'TSO',
            'PA'       => 'PAL',
        ];       
    /**
     * 获取文件List
    */
    public static function getEdocFile($hbol,$docTypes,$oceanAir){
        try {
            $result = null;

            //old code => Doc_Code
            $mapping = $oceanAir == "ocean" ? self::$oceanMapping : self::$airMapping;
            $resultDocTypes = array_values(array_filter(
                array_map(
                    fn($type) => $mapping[$type] ?? null,
                    $docTypes
                ),
                fn($mapped) => !empty($mapped) // 过滤 null 和空字符串
            ));

            $data = [
                'fromStation' => '',
                'hbol'        => $hbol,
                'docTypes'    => $resultDocTypes
            ];
            // $data = [
            //     'fromStation' => '',
            //     'hbol'        => 'ABCNA1008776',
            //     'docTypes'    => ["WO"]
            // ];

            $accessTokenUrl = 'http://dms.kln.com/keycloak/realms/dsms-realm/protocol/openid-connect/token';
            //prod 账号
            $grant_type = 'client_credentials';
            $client_id = 'online';
            $client_secret = 'ouuRZ8QbIrcqKZi0NBJLt7PUEiRr5uXd';
            $accessToken = dms_edoc::getAccessToken($accessTokenUrl,$grant_type,$client_id,$client_secret);
            if ($accessToken === null) {
                throw new Exception("Failed to obtain access token");
            }

            $New_Dms_Url = 'http://dms.kln.com/edoc/documents/fileList'; 
            $result = dms_edoc::CURLClient($New_Dms_Url,$accessToken,$data);
        } catch (Exception $e) {
            error_log("Error getEdocFile: " . $e->getMessage());
        }
        return $result;
        
    }

    /**
     * 下载文件byoutId 
    */
    public static function downloadEdocFile($outId,$display_name){
        try {
            $result = null;
            $data = ['outId' => $outId];

            $accessTokenUrl = 'http://dms.kln.com/keycloak/realms/dsms-realm/protocol/openid-connect/token';
            //prod 账号
            $grant_type = 'client_credentials';
            $client_id = 'online';
            $client_secret = 'ouuRZ8QbIrcqKZi0NBJLt7PUEiRr5uXd';
            $accessToken = dms_edoc::getAccessToken($accessTokenUrl,$grant_type,$client_id,$client_secret);
            if ($accessToken === null) {
                throw new Exception("Failed to obtain access token");
            }

            $New_Dms_Url = 'http://dms.kln.com/storagesrv/files/download/edoc/downloadByOutId'; 
            dms_edoc::CURLClientDownload($New_Dms_Url,$accessToken,$data,$display_name);
        } catch (Exception $e) {
            error_log("Error getEdocFile: " . $e->getMessage());
        }
    }

    public static function getAccessToken($accessTokenUrl,$grant_type,$client_id,$client_secret){
        //还是需要这个，如果在一个请求里多次调用这个方法的话,就可以用缓存的
        if (self::$cachedToken !== null && time() * 1000 < self::$tokenExpiryTime) {
            return self::$cachedToken;
        }

        $postData = http_build_query([
            'grant_type' => $grant_type,
            'client_id' => $client_id,
            'client_secret' => $client_secret
        ]);

        $headers = [
            'Content-Type: application/x-www-form-urlencoded',
            'Accept: application/json'
        ];

        $curlInit = curl_init();

        curl_setopt_array($curlInit, [
            CURLOPT_URL            => $accessTokenUrl,
            CURLOPT_POST           => true,
            CURLOPT_POSTFIELDS     => $postData,
            CURLOPT_HTTPHEADER     => $headers,
            CURLOPT_RETURNTRANSFER => true,  // 关键！返回字符串而不是输出
            CURLOPT_SSL_VERIFYPEER => false, // 生产环境建议开启
            CURLOPT_TIMEOUT        => 30,
            CURLOPT_HEADER         => false,  // 不返回 header
        ]);

        $response = curl_exec($curlInit);
        $httpCode = curl_getinfo($curlInit, CURLINFO_HTTP_CODE);

        // 关闭 cURL
        curl_close($curlInit);

        // 解析响应
        if ($httpCode === 200) {
            $jsonResponse = json_decode($response, true);
            if (isset($jsonResponse['access_token'])) {
                self::$cachedToken = $jsonResponse['access_token'];
                $expiresIn = isset($jsonResponse['expires_in']) ?
                    $jsonResponse['expires_in'] * 1000 : 600 * 1000;
                self::$tokenExpiryTime = (time() * 1000) + $expiresIn - 300000;
                return self::$cachedToken;
            } 
        }
        //如果是这里返回,说明Token请求失败
        self::$cachedToken = null;
        self::$tokenExpiryTime = 0; 
        return null;
    }

    /**
     * 使用 cURL 获取文件list
    */
    public static function CURLClient($url,$accessToken,$data){
        $headers = [
            'Authorization: Bearer ' . $accessToken,
            'Content-Type: application/json',
            'Accept: ' . 'application/json'
        ];
        //$url = 'http://dsms-alb-internet-facing-449737170.ap-southeast-1.elb.amazonaws.com/edoc/documents/fileList';
        //$url = 'http://dms.kln.com/edoc/documents/fileList';
        // 将数据编码为 JSON
        $jsonData = json_encode($data);
        try {
            $curlInit = curl_init();

            curl_setopt_array($curlInit, [
                CURLOPT_URL            => $url,
                CURLOPT_POST           => true,
                CURLOPT_POSTFIELDS     => $jsonData,
                CURLOPT_HTTPHEADER     => $headers,
                CURLOPT_RETURNTRANSFER => true,  // 关键！返回字符串而不是输出
                CURLOPT_SSL_VERIFYPEER => false, // 生产环境建议开启
                CURLOPT_TIMEOUT        => 30,
                CURLOPT_HEADER         => false,  // 不返回 header
            ]);

            $response = curl_exec($curlInit);
            // 检查是否有错误
            if ($response === false) {
                $error = curl_error($curlInit);
                error_log("cURL 请求失败: " . $error);
                throw new Exception("cURL 请求失败: " . $error);
            }
            // 获取 HTTP 状态码
            $httpCode = curl_getinfo($curlInit, CURLINFO_HTTP_CODE);
            // 关闭 cURL
            curl_close($curlInit);
            // 解析响应
            $result = json_decode($response, true);
            if ($httpCode == 200 && isset($result['data'])) {
                return json_encode($result['data'], JSON_UNESCAPED_UNICODE);
            }
        } catch (Exception $e) {
            error_log($e->getMessage());
        }
        return null;
    }

    /**
     * 使用 cURL 下载文件
    */
    public static function CURLClientDownload($url,$accessToken,$data,$filename){
        $headers = [
            'Authorization: Bearer ' . $accessToken,
            'Content-Type: application/json'
        ];
        // 将数据编码为 JSON
        $jsonData = json_encode($data);
        try {
            $curlInit = curl_init();

            curl_setopt_array($curlInit, [
                CURLOPT_URL            => $url,
                CURLOPT_POST           => true,
                CURLOPT_POSTFIELDS     => $jsonData,
                CURLOPT_HTTPHEADER     => $headers,
                CURLOPT_RETURNTRANSFER => true,  // 关键！返回字符串而不是输出
                CURLOPT_SSL_VERIFYPEER => false, // 生产环境建议开启
                CURLOPT_TIMEOUT        => 30,
                CURLOPT_HEADER         => false,  // 不返回 header
            ]);

            $response = curl_exec($curlInit);
            // 检查是否有错误
            if ($response === false) {
                $error = curl_error($curlInit);
                error_log("cURL 请求失败: " . $error);
                throw new Exception("cURL 请求失败: " . $error);
            }
            // 获取 HTTP 状态码
            $httpCode = curl_getinfo($curlInit, CURLINFO_HTTP_CODE);
            // 关闭 cURL
            curl_close($curlInit);

            // 判断响应是否是 JSON（通常是错误信息）
            $isJson = false;
            $jsonResponse = json_decode($response, true);

            if (json_last_error() === JSON_ERROR_NONE && isset($jsonResponse['status'])) {
                $isJson = true;
            }

            if ($isJson) {
                // 是错误响应
                if ($jsonResponse['status'] === 'FAILED') {
                    // 是 DMS 返回的错误
                    http_response_code(404);
                    header('Content-Type: application/json; charset=utf-8');
                    echo json_encode([
                        'error' => $jsonResponse['message'] ?? 'Document not found',
                        'code'  => $jsonResponse['code'] ?? 'download_error'
                    ], JSON_UNESCAPED_UNICODE);
                    return;
                }
            } else {
                // 直接当作 ZIP 下载
                while (ob_get_level()) ob_end_clean();
                //header("Content-Type: application/pdf");
                header("Content-type:" . common::getContentType($filename));
                header("Content-Length: " . strlen($response));
                header("Content-Disposition: attachment; filename=\"" . rawurlencode($filename) . "\"; filename*=UTF-8''" . rawurlencode($filename));
                header("Cache-Control: no-cache, must-revalidate");
                header("Pragma: public");

                echo $response;
                exit;
            }
        } catch (Exception $e) {
            error_log($e->getMessage());
        }
    }
}
?>