'use strict'
/**
 * Copyright (c) 2017~2019, OBCon Inc.
 * All rights reserved.
 */

/**
 * @file
 * @copyright 2017~2019, OBCon Inc.
 * @author gye hyun james kim [pnuskgh@gmail.com]
 */

//--- https://www.npmjs.com/package/request
//--- https://github.com/request/request/blob/master/request.js
let request = require('request');
let xml2js = require('xml2js');

//--- ThingPlug에서 전달되는 데이터의 최대 크기는 65 bytes 임
//--- 전송 가능한 HTTP 수신 대상의 갯수는 4개임
//--- 사용하는 곳
//---     modules/thingplugs/view.js
class ThingPlug {
    constructor() {
    }

    exs(code) {                                             //--- Execute Status (장치 제어 상태 정보)
        let msg = '';
        switch (code) {
        case 1: msg = 'INITIATED'; break;
        case 2: msg = 'PENDING'; break;
        case 3: msg = 'FINISHED'; break;
        case 4: msg = 'CANCELLING'; break;
        case 5: msg = 'CANCELLED'; break;
        case 6: msg = 'STATUS_NON_CANCELLABLE'; break;
        }
        return msg;
    }

    exr(code) {
        let msg = '';
        switch (code) {
        case  0: msg = 'STATUS_REQUEST_SUCCEED'; break;
        case  1: msg = 'STATUS_REQUEST_UNSUPPORTED'; break;
        case  2: msg = 'STATUS_REQUEST_DENIED'; break;
        case  3: msg = 'STATUS_CANCELLATION_DENIED'; break;
        case  4: msg = 'STATUS_INTERNAL_ERROR'; break;
        case  5: msg = 'STATUS_INVALID_ARGUMENTS'; break;
        case  6: msg = 'STATUS_RESOURCES_EXCEEDED'; break;
        case  7: msg = 'STATUS_FILE_TRANSFER_FAILED'; break;
        case  8: msg = 'STATUS_FILE_TRANSFER_SERVER_AUTHENTICATION_FAILURE'; break;
        case  9: msg = 'STATUS_UNSUPPORTED_PROTOCOL'; break;
        case 10: msg = 'STATUS_UPLOAD_FAILED'; break;
        case 11: msg = 'STATUS_FILE_TRANSFER_FAILED_MULTICAST_GROUP_UNABLE_JOIN'; break;
        case 12: msg = 'STATUS_FILE_TRANSFER_FAILED_SERVER_CONTACT_FAILED'; break;
        case 13: msg = 'STATUS_FILE_TRANSFER_FAILED_FILE_ACCESS_FAILED'; break;
        case 14: msg = 'STATUS_FILE_TRANSFER_FAILED_DOWNLOAD_INCOMPLETE'; break;
        case 15: msg = 'STATUS_FILE_TRANSFER_FAILED_FILE_CORRUPTED'; break;
        case 16: msg = 'STATUS_FILE_TRANSFER_FILE_AUTHENTICATION_FAILURE'; break;
        case 17: msg = 'STATUS_FILE_TRANSFER_FAILED'; break;
        case 18: msg = 'STATUS_FILE_TRANSFER_SERVER_AUTHENTICATION_FAILURE'; break;
        case 19: msg = 'STATUS_FILE_TRANSFER_WINDOW_EXCEEDED'; break;
        case 20: msg = 'STATUS_INVALID_UUID_FORMAT'; break;
        case 21: msg = 'STATUS_UNKNOWN_EXECUTION_ENVIRONMENT'; break;
        case 22: msg = 'STATUS_DISABLED_EXECUTION_ENVIRONMENT'; break;
        case 23: msg = 'STATUS_EXECUTION_ENVIRONMENT_MISMATCH'; break;
        case 24: msg = 'STATUS_DUPLICATE_DEPLOYMENT_UNIT'; break;
        case 25: msg = 'STATUS_SYSTEM_RESOURCES_EXCEEDED'; break;
        case 26: msg = 'STATUS_UNKNOWN_DEPLOYMENT_UNIT'; break;
        case 27: msg = 'STATUS_INVALID_DEPLOYMENT_UNIT_STATE'; break;
        case 28: msg = 'STATUS_INVALID_DEPLOYMENT_UNIT_UPDATE_DOWNGRADE_DISALLOWED'; break;
        case 29: msg = 'STATUS_INVALID_DEPLOYMENT_UNIT_UPDATE_UPGRADE_DISALLOWED'; break;
        case 30: msg = 'STATUS_INVALID_DEPLOYMENT_UNIT_UPDATE_VERSION_EXISTS'; break;
        case 31: msg = 'STATUS_DEVICE_MANAGEMENT_TIME_OUT'; break;
        case 32: msg = 'STATUS_NW_SVR_TRANSFER_FAILED'; break;
        }
        return msg;
    }

    ltid2eui(ltid) {
        return ltid.substr(8);
    }
    
    _getThingPlugInfo(site, device) {
        if (config.ThingPlug.apply == 'device') {
            if ((device != null) && (device.appEUI != '') && (device.uKey != '')) {
                return {
                    appEUI: security.decrypt(device.appEUI),
                    uKey: security.decrypt(device.uKey)
                };
            }
        }

        if ((config.ThingPlug.apply == 'site') || (config.ThingPlug.apply == 'device')) {
            if ((site.appEUI != '') && (site.uKey != '')) {
                return {
                    appEUI: security.decrypt(site.appEUI),
                    uKey: security.decrypt(site.uKey)
                };
            }
        }

        return {
            appEUI: security.decrypt(config.ThingPlug.appEUI),
            uKey: security.decrypt(config.ThingPlug.uKey)
        };
    }

    eui2ltid(site, device, eui) {
        let info = this._getThingPlugInfo(site, device);
        return info.appEUI.substr(8) + eui;
    }

    stringToHex(str) {
        const buf = Buffer.from(str, 'utf8');
        return buf.toString('hex');
    }

    hexToString(str) {
        const buf = new Buffer(str, 'hex');
        return buf.toString('utf8');
    }
    
    _getServerUrl() {
        return config.ThingPlug.protocol + '://' + config.ThingPlug.host + ':' + config.ThingPlug.port;
    }

    randomInt (low, high) {
        return Math.floor(Math.random() * (high - low + 1) + low);
    }

    getOptions(site, device, path, isJson=true, randomSeq = '000001') {
        let info = this._getThingPlugInfo(site, device);

        randomSeq = this.randomInt(100000, 999999)
        let options = {
            uri: this._getServerUrl() + path,
            headers: {
                'X-M2M-RI': info.appEUI + '_' + randomSeq,
                'X-M2M-Origin': info.appEUI,
                'ukey': info.uKey
            }
        };

        if (isJson) {
            options.headers.Accept = 'application/json';
        } else {
            options.headers.Accept = 'application/xml';
        }
        return options;
    }

    isJsonRequest(options) {
        return options.headers.Accept == 'application/json';
    }

    // getUserKey(callback) {
    //     //--- To-Do : Site별 설정 적용
    //     let options = {
    //         uri: this._getServerUrl() + '/ThingPlug?division=user&function=login',
    //         headers: {
    //             'Accept': 'application/json',
    //             'user_id': config.ThingPlug.userid,
    //             'password': security.decrypt(config.ThingPlug.passwd)
    //         }
    //     };
        
    //     request.put(options, function (error, response, body) {
    //         if (!error && response.statusCode == 200) {
    //             let resp = JSON.parse(body);
    //             if (resp.result_code == '200') {
    //                 callback({ code: 0, msg: 'normal'} , { uKey: resp.userVO.uKey }, body);
    //             } else {
    //                 callback({ code: 2, msg: 'error'} , null, body);
    //             }
    //         } else {
    //             logger.error('interfaces/thing_plug.js :: error : ' + JSON.stringify(error));
    //             logger.error('interfaces/thing_plug.js :: response: ' + JSON.stringify(response));
    //             callback({ code: 1, msg: 'error' }, null, null);
    //         }
    //     });
    // }

    //--- response.total_list_count     : 전체 갯수
    //--- response.deviceSearchAPIList  : Device 정보 배열
    getDeviceList(site, device, startIndex = 1, callback) {
        let options = this.getOptions(site, device, '/ThingPlug?division=searchDevice&function=myDevice&' + 
                                      'startIndex=' + startIndex + '&countPerPage=1000');
        request.get(options, function (error, response, body) {
            // console.log('body', body);
            if (!error && response.statusCode == 200) {
                let resp = JSON.parse(body);
                if (resp.result_code == '200') {
                    callback({ code: 0, msg: 'normal'} , {  
                        total: resp.total_list_count,
                        devices: resp.deviceSearchAPIList
                    }, body);
                } else {
                    callback({ code: 2, msg: 'error'} , null, body);
                }
            } else {
                logger.error('interfaces/thing_plug.js :: error : ' + JSON.stringify(error));
                logger.error('interfaces/thing_plug.js :: response: ' + JSON.stringify(response));
                callback({ code: 1, msg: 'error' }, null, null);
            }
        });
    }

    getDevice(site, device, ltid, callback) {
        let info = this._getThingPlugInfo(site, device);
        let options = this.getOptions(site, device, '/' + info.appEUI + 
                                      '/' + config.ThingPlug.appVersion + 
                                      '/node-' + ltid);

        request.get(options, function (error, response, body) {
            // console.log('body', body);
            if (!error && response.statusCode == 200) {
                let resp = JSON.parse(body);
                callback({ code: 0, msg: 'normal'} , resp, body);
            } else {
                logger.error('interfaces/thing_plug.js :: error : ' + JSON.stringify(error));
                logger.error('interfaces/thing_plug.js :: response: ' + JSON.stringify(response));
                callback({ code: 1, msg: 'error' }, null, null);
            }
        });
    }

    //--- response.cin.con (Hex로 저장되어 있음)
    getLatestData(site, device, ltid, callback) {
        let info = this._getThingPlugInfo(site, device);
        let options = this.getOptions(site, device, '/' + info.appEUI + 
                                      '/' + config.ThingPlug.appVersion + 
                                      '/remoteCSE-' + ltid + '/container-LoRa/latest');

        request.get(options, function (error, response, body) {
            console.log('body', body);
            if (!error && response.statusCode == 200) {
                let resp = JSON.parse(body);
                callback({ code: 0, msg: 'normal'} , resp, body);
            } else {
                logger.error('interfaces/thing_plug.js :: error : ' + JSON.stringify(error));
                logger.error('interfaces/thing_plug.js :: response: ' + JSON.stringify(response));
                callback({ code: 1, msg: 'error' }, null, null);
            }
        });

    }

    //---   execInc : exin.ri
    // <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    // <m2m:mgc xmlns:m2m="http://www.onem2m.org/xml/protocols" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    //     <ty>12</ty>
    //     <ri>MC00000000000001489571</ri>
    //     <rn>00000592702c1ffffe4f1640_extDevMgmt</rn>
    //     <pi>CB00000000000000000656</pi>
    //     <ct>2019-04-05T11:14:49+09:00</ct>
    //     <lt>2019-04-05T11:14:49+09:00</lt>
    //     <cmt>extDevMgmt</cmt>
    //     <exe>false</exe>
    //     <ext>ND00000000000000372613</ext>
    //     <m2m:exin>
    //         <ty>8</ty>
    //         <ri>EI00000000000364925833</ri>
    //         <rn>EI00000000000364925833</rn>
    //         <pi>MC00000000000001489571</pi>
    //         <ct>2019-04-09T18:43:00+09:00</ct>
    //         <lt>2019-04-09T18:43:00+09:00</lt>
    //         <et>2019-04-10T18:43:00+09:00</et>
    //         <exs>2</exs>
    //         <ext>ND00000000000000372613</ext>
    //         <exra>01020304</exra>
    //     </m2m:exin>
    // </m2m:mgc>
    deviceControl(site, device, ltid, data, callback) {
        let info = this._getThingPlugInfo(site, device);
        let options = this.getOptions(site, device, '/' + info.appEUI + 
                                      '/' + config.ThingPlug.appVersion + 
                                      '/mgmtCmd-' + ltid + '_extDevMgmt', false);
        options.headers['Content-Type'] = 'application/xml';
        options.body = '<?xml version="1.0" encoding="UTF-8"?>'
                     + '<m2m:mgc'
                     + '    xmlns:m2m="http://www.onem2m.org/xml/protocols"'
                     + '    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">'
                     + '    <exe>true</exe>'
                     + '    <exra>' + this.stringToHex(data) + '</exra>'      //--- Hex로 표시할 것
                     + '</m2m:mgc>';
        // options.json = true;
        // console.log(options);
        request.put(options, function (error, response, body) {
            // console.log('body', body);
            if (!error && response.statusCode == 200) {
                xml2js.parseString(body, function (err, result) {
                    if (err) {
                        logger.error('interfaces/thing_plug.js :: err : ' + JSON.stringify(err));
                        callback({ code: 2, msg: 'error' }, null, body);
                        return;
                    }

                    callback({ code: 0, msg: 'normal'} , result, body);
                });
            } else {
                logger.error('interfaces/thing_plug.js :: error : ' + JSON.stringify(error));
                //--- response.statusCode : 404 - Not Found
                logger.error('interfaces/thing_plug.js :: response: ' + JSON.stringify(response));
                callback({ code: 1, msg: 'error' }, null, null);
            }
        }); 
    }

    //--- 001_ThingPlug_API_Document_v1_7.pdf의 43 페이지 참조
    //---   exs = 3 : 처리됨
    //---   exr = 0 : 정상
    getControlResult(site, device, ltid, execIns, callback) {
        let info = this._getThingPlugInfo(site, device);
        let options = this.getOptions(site, device, '/' + info.appEUI + 
                                      '/' + config.ThingPlug.appVersion + 
                                      '/mgmtCmd-' + ltid + '_extDevMgmt/execInstance-' + execIns);
        request.get(options, function (error, response, body) {
            console.log('body', body);
            if (!error && response.statusCode == 200) {
                let resp = JSON.parse(body);
                callback({ code: 0, msg: 'normal'} , resp, body);
            } else {
                logger.error('interfaces/thing_plug.js :: error : ' + JSON.stringify(error));
                logger.error('interfaces/thing_plug.js :: response: ' + JSON.stringify(response));
                callback({ code: 1, msg: 'error' }, null, null);
            }
        });
    }

    subCreate(site, device, ltid, callback) {
        let info = this._getThingPlugInfo(site, device);
        let options = this.getOptions(site, device, '/' + info.appEUI + 
                                      '/' + config.ThingPlug.appVersion + 
                                      '/remoteCSE-' + ltid + '/container-LoRa', false);
        options.headers['X-M2M-NM'] = config.ThingPlug.conSubName;
        options.headers['Content-Type'] = 'application/vnd.onem2m-res+xml;ty=23';

        let protocol = (config.ThingPlug.appServer.startsWith('http://')) ? 'HTTP':'HTTP';
        options.body = '<?xml version="1.0" encoding="UTF-8"?>'
                     + '<m2m:sub'
                     + '    xmlns:m2m="http://www.onem2m.org/xml/protocols"'
                     + '    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">'
                     + '    <enc>'
                     + '         <rss>1</rss>'
                     + '    </enc>'
                     + `    <nu>${protocol}|${config.ThingPlug.appServer}</nu>`
                     + '    <nct>2</nct>'
                     + '</m2m:sub>';
        console.log(options);
        request.post(options, function (error, response, body) {
            console.log('body', body);
            // console.log('response', response);
            console.log('response.statusCode', response.statusCode);            //--- 201 코드가 반환 된다.
            if (response.statusCode == 404) {
                callback({ code: 3, msg: '모뎀이 없음' }, null, body);
                return;
            }

            if (!error && response.complete == true) {
                xml2js.parseString(body, function (err, result) {
                    if (err) {
                        logger.error('interfaces/thing_plug.js :: err : ' + JSON.stringify(err));
                        callback({ code: 2, msg: 'error' }, null, body);
                        return;
                    }

                    // console.log(result);
                    // console.log(JSON.stringify(result.ThingPlug.user));
                    callback({ code: 0, msg: 'normal'} , result, body);
                });
            } else {
                logger.error('interfaces/thing_plug.js :: error : ' + JSON.stringify(error));
                logger.error('interfaces/thing_plug.js :: response: ' + JSON.stringify(response));
                callback({ code: 1, msg: 'error' }, null, null);
            }
        });           
    }

    //--- response.sub.nu[0]
    subRetrieve(site, device, ltid, callback) {
        let info = this._getThingPlugInfo(site, device);
        let options = this.getOptions(site, device, '/' + info.appEUI + 
                                      '/' + config.ThingPlug.appVersion + 
                                      '/remoteCSE-' + ltid + '/container-LoRa/subscription-' + config.ThingPlug.conSubName);

        request.get(options, function (error, response, body) {
            if (!error && response.statusCode == 200) {
                let resp = JSON.parse(body);
                callback({ code: 0, msg: 'normal'} , resp, body);
            } else {
                logger.error('interfaces/thing_plug.js :: error : ' + JSON.stringify(error));
                logger.error('interfaces/thing_plug.js :: response: ' + JSON.stringify(response));
                callback({ code: 1, msg: 'error' }, null, null);
            }
        });
    }

    //--- To-Do : 테스트를 하지 않음
    subUpdate(site, device, ltid, callback) {
        logger.info('interfaces/thing_plug.js :: Start subUpdate');
        let info = this._getThingPlugInfo(site, device);
        let options = this.getOptions(site, device, '/' + info.appEUI + 
                                      '/' + config.ThingPlug.appVersion + 
                                      '/remoteCSE-' + ltid + '/container-LoRa/subscription-' + config.ThingPlug.conSubName, false);

        options.headers['X-M2M-NM'] = config.ThingPlug.conSubName;
        options.headers['Content-Type'] = 'application/vnd.onem2m-res+xml;ty=23';

        let protocol = (config.ThingPlug.appServer.startsWith('http://')) ? 'HTTP':'HTTP';
        options.body = '<?xml version="1.0" encoding="UTF-8"?>'
                     + '<m2m:sub'
                     + '    xmlns:m2m="http://www.onem2m.org/xml/protocols"'
                     + '    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">'
                     + '    <enc>'
                     + '         <rss>1</rss>'
                     + '    </enc>'
                     + `    <nu>${protocol}|${config.ThingPlug.appServer}</nu>`
                     + '    <nct>2</nct>'
                     + '</m2m:sub>';
        console.log(options);
        request.put(options, function (error, response, body) {
            console.log('body', body);
            console.log('response.statusCode', response.statusCode);
            if (!error && response.complete == true) {
                xml2js.parseString(body, function (err, result) {
                    if (err) {
                        logger.error('interfaces/thing_plug.js :: err : ' + JSON.stringify(err));
                        callback({ code: 2, msg: 'error' }, null, body);
                        return;
                    }

                    callback({ code: 0, msg: 'normal'} , result, body);
                });
            } else {
                logger.error('interfaces/thing_plug.js :: error : ' + JSON.stringify(error));
                logger.error('interfaces/thing_plug.js :: response: ' + JSON.stringify(response));
                callback({ code: 1, msg: 'error' }, null, null);
            }
        }); 
    }

    subDelete(site, device, ltid, callback) {
        logger.info('interfaces/thing_plug.js :: Start subDelete');
        let info = this._getThingPlugInfo(site, device);
        let options = this.getOptions(site, device, '/' + info.appEUI + 
                                      '/' + config.ThingPlug.appVersion + 
                                      '/remoteCSE-' + ltid + '/container-LoRa/subscription-' + config.ThingPlug.conSubName, false);

        request.del(options, function (error, response, body) {
            if (!error && response.statusCode == 200) {
                xml2js.parseString(body, function (err, result) {
                    if (err) {
                        logger.error('err : ' + JSON.stringify(err));
                        callback({ code: 2, msg: 'error' }, null, body);
                        return;
                    }

                    callback({ code: 0, msg: 'normal'} , result, body);
                });
            } else {
                logger.error('interfaces/thing_plug.js :: error : ' + JSON.stringify(error));
                logger.error('interfaces/thing_plug.js :: response: ' + JSON.stringify(response));
                callback({ code: 1, msg: 'error' }, null, null);
            }
        });  
    }
}

module.exports = ThingPlug;