var winston = require('winston');
  var soap = require('soap');

  var crypto = require('crypto');
  var strftime = require('strftime');

  var fs = require("fs");

  var http = require("http");

  var url = require("url");

  var mongoClient = require('mongodb').MongoClient;
  var moment = require('moment');

  
  process.chdir(__dirname);

  
  var max_retry = 10;
  var sleep_before_retry = 5000;
  
  var config;
  var callbackReport;
  var aaa;
  var logger;
  var options;

  var mongodb;

  
  function start(_config, _callbackReport, options) {
      config = _config;
      callbackReport = _callbackReport
  
      if (options && options.aaa) {
              aaa = options.aaa;
      }
  
      if (options && options.logger) {
          logger = options.logger;
      } else {
          logger = new winston.Logger({
              transports: [
                new (winston.transports.Console)()
              ]
          });
      }

  
      initMongoClient();
  }
  
  function initMongoClient() {
      if (!config || !config.mongodb || !config.mongodb.url) {
          return;
      }
  
      try {
          var url = config.mongodb.url;
  
          mongoClient.connect(url, function(err, db) {
              if (err) {
                  logger.warn('Failed to connect to mongodb', {err: err});
                  return;
              }
              mongodb = db;
              logger.info('MongoDB connected');
          });
      }
      catch(err) {
          logger.warn('Exception when connecting to mongodb', {err: err, url: url});
      }
  }
  
  function insertTaskToMongoDb(task) {
      if (!isMongoReady()) { return; }
  
      task.supplier = config.globals.gateway_name;
      task.rc = '68';
  
      try {
          mongodb.collection(config.mongodb.collection).insertOne(task);
      }
      catch(err) {
          //logger.warn('Exception when inserting document to mongodb', {err: err, task: task});
      }
  }
  
  function pushResponseToMongoDb(task, response, rc) {
      if (!isMongoReady()) { return; }

      try {

          if (!response.ts) {
              response.ts = strftime('%Y-%m-%d %H:%M:%S', new Date());
          }

          mongodb.collection(config.mongodb.collection).updateOne(
              {requestId: task.requestId},
              {
                  $set: {
                      lastResponse: response,
                      supplier: config.globals.gateway_name,
                      rc: rc
                  },
                  $push: {
                      responses: response
                  }
              },
              function(err, result) {
                  if (err) {
                      logger.warn('Error when pushing response to mongodb', {err: err, task: task, response: response});
                      return;
                  }
              }
          );
      }
      catch(err) {
          logger.warn('Exception when pushing response to mongodb', {err: err, task: task, response: response});
      }
  }
  
  function isMongoReady() {
      if (!config.mongodb) { return; }
      if (!config.mongodb.collection) { return; }
      if (!mongodb) { return; }
  
      return true;

  }
  
  function topupRequest(task, retry) {

      task.ts = moment(task.timestamp, 'YYYYMMDDHHmmss').format('YYYY-MM-DD HH:mm:ss');
      task.ts_date = moment(task.timestamp, 'YYYYMMDDHHmmss').format('YYYY-MM-DD');
  
      insertTaskToMongoDb(task);

      saldoCheck(billpayment, task);
  }
  
  function saldoCheck(callback, task) {
  
      var params = {
          userName: config.h2h_out.userid,
          productCode: '00000' ,
          terminal: 'H2HIPN10',
          transactionType: '61',

          reff: Math.ceil( Math.random() * 99999999 ),

          timeStamp: strftime('%Y-%m-%d %H:%M:%S', new Date())

      }

      params.signature = createSignatureForSaldoCheck(params, config.h2h_out.password);

      soap.createClient(config.h2h_out.partner, function(err, soapClient) {

  
          if (err) {

  
              var errorMessage = 'Error creating soap client for saldoCheck: ' + err;
  
              logger.warn(errorMessage, {err: err});
              callbackReport(task.requestId, '40', errorMessage);

              pushResponseToMongoDb(task, {supplier: config.globals.gateway_name, raw: errorMessage}, '40');

              return;

          }

          logger.info('Requesting to service', {url: config.h2h_out.partner, params: params});
          soapClient.apih2h.apih2hPort.saldoCheck({ inputSaldo: params }, function(err, result) {
  
              logger.verbose(
                  'Got saldoCheck response',
                  {
                      lastEndpoint: soapClient.lastEndpoint,
                      lastRequest: soapClient.lastRequest,
                      lastMessage: soapClient.lastMessage,
                      lastResponse: soapClient.lastResponse,
                  }
              );
  
              if (err) {

                  var errorMessage = 'Error requesting saldoCheck: ' + err;
  
                  logger.warn(errorMessage, {err: err});
                  callbackReport(task.requestId, '40', errorMessage);

                  pushResponseToMongoDb(task, {supplier: config.globals.gateway_name, raw: errorMessage}, '40');

              }

              var balance;
              logger.verbose('saldoCheck result', {result: result});

              try {
                  balance = result.outputParameter.bit61.$value;
              }
              catch(e) {
                  balance = 'UNKNOWN';
              }

  
              if (task) {
                  callback(task, balance);
              }
          });

      });

  
  }
  
  function billpayment(task, balance) {

      var terminalSuffix = Math.ceil( Math.random() * 20 ) + 10;

      var remoteProduct = task.remoteProduct.split(',');

      var params = {

          userName: config.h2h_out.userid,
          productCode: remoteProduct[0] ,

          terminal: 'H2HIPN' + terminalSuffix,

          transactionType: '50',
          billNumber: createBillNumber(task.destination),
          amount: remoteProduct[1],
          bit61: createBillNumber(task.destination),
          reff: task.requestId,

          timeStamp: strftime('%Y-%m-%d %H:%M:%S', new Date())

      }

      var signature = createSignature(params, config.h2h_out.password);
      params.signature = signature;

      soap.createClient(config.h2h_out.partner, function(err, soapClient) {

          var _params = {
              userName: params.userName,
              signature: params.signature,
              productCode: params.productCode,
              terminal: params.terminal,
              transactionType: params.transactionType,
              billNumber: params.billNumber,
              amount: params.amount,
              bit61: params.bit61,
              reff: params.reff,
              timeStamp: params.timeStamp
          }
  
          logger.info('Requesting to service', {url: config.h2h_out.partner, params: _params});
  
          soapClient.apih2h.apih2hPort.billpayment({ inputCheck: _params }, function(err, result) {

              logger.verbose(
                  'Got response',
                  {
                      lastEndpoint: soapClient.lastEndpoint,
                      lastRequest: soapClient.lastRequest,
                      lastMessage: soapClient.lastMessage,
                      lastResponse: soapClient.lastResponse,
                  }
              );

              if (err) {

                  var errorMessage = 'Error requesting service: ' + err;
  
                  logger.warn(errorMessage, {err: err});
                  callbackReport(task.requestId, '68', errorMessage);

                  pushResponseToMongoDb(task, {supplier: config.globals.gateway_name, raw: soapClient.lastResponse}, '68');

                  return;
              }

              topupResponseHandler(task, result, balance, soapClient.lastResponse);

          });
      });
  }

  function topupResponseHandler(task, response, balance, rawResponse) {

      var st24rc = '68';
      var st24message = response.outputParameter.resultDesc.$value;

      var resultCode = parseInt(response.outputParameter.resultCode.$value);
      var bit39 = parseInt(response.outputParameter.bit39.$value);

      var sn = '';

      if ( resultCode == 1 ) {

          // product disabled
          st24rc = '13';
      }

      else if ( resultCode == 2 ) {

          // prodcode disable
          st24rc = '13';
      }

      else if ( resultCode == 3 ) {

          // duplicate reff
          st24rc = '55';
      }

      else if ( resultCode == 4 ) {

          // not enough balance
          st24rc = '40';
      }

      else if ( resultCode == 5 ) {

          // username blocked
          st24rc = '40';
      }

      else if ( resultCode == 6 ) {

          // not exists username
          st24rc = '40';
      }

      else if ( resultCode == 11 ) {

          // invalid request
          st24rc = '40'
      }

      else if ( resultCode == 12 ) {

          // no route to host
          st24rc = '40'
      }

      else if ( resultCode == 13 ) {

          // invalid signature
          st24rc = '40'
      }

      else if ( bit39 == 6 ) {

          st24rc = '40';
          st24message = 'Error Transaksi ditolak karena terjadi error di H2H dengan response code diluar daftar ini. Silahkan hubungi H2H';
      }

      else if ( bit39 == 12 ) {

          st24rc = '40';
          st24message = 'Invalid Transaction Transaksi ditolak karena flow transaksi tidak valid';
      }

      else if ( bit39 == 13 ) {

          st24rc = '13';
          st24message = 'Invalid voucher nominal';
      }

      else if ( bit39 == 14 ) {

          st24rc = '14';
          st24message = 'MSISDN tidak ditemukan';
      }

      else if ( bit39 == 30 ) {

          st24rc = '40';
          st24message = 'Format Error';
      }

      else if ( bit39 == 31 ) {

          st24rc = '40';
          st24message = 'Kode bank tidak terdaftar';
      }

      else if ( bit39 == 63 ) {

          st24rc = '40';
          st24message = 'Reversal denied';
      }

      else if ( bit39 == 68 ) {

          st24rc = '68';
          st24message = 'Transaksi sedang dalam proses';
      }

      else if ( bit39 == 69 ) {

          st24rc = '68';
          st24message = 'Respon Ok lebih dari 24 detik';
      }

      else if ( bit39 == 70 ) {

          st24rc = '13';
          st24message = 'Voucher out of stock';
      }

      else if ( bit39 == 79 ) {

          st24rc = '14';
          st24message = 'Phone number is blocked by Telkomsel';
      }

      else if ( bit39 == 81 ) {

          st24rc = '14';
          st24message = 'Phone number is expired';
      }

      else if ( bit39 == 89 ) {

          st24rc = '40';
          st24message = 'Link to billing provider is down';
      }

      else if ( bit39 == 91 ) {

          st24rc = '40';
          st24message = 'Database problem';
      }

      else if ( bit39 == 92 ) {

          st24rc = '40';
          st24message = 'Unable to route transaction';
      }

      else if ( bit39 == 94 ) {

          st24rc = '40';
          st24message = 'Duplicate reversal request';
      }

      else if ( resultCode == 0 && bit39 == 0) {

          try {
              sn = response.outputParameter.bit61.$value.substring(43);
          }

          catch(e) {

              sn = '';
          }
  
          st24message = 'SN=' + sn + '; ' + st24message;
          st24rc = '00';
      }

      var message =
          response.outputParameter.resultCode.$value
          + " " + response.outputParameter.resultDesc.$value

          + "; BIT39: " + response.outputParameter.bit39.$value

          ;

      if (response.outputParameter.resultDesc.$value != st24message) {
          var message = message + " " + st24message;
      }

      message = message + ' -- Prev Balance: ' + balance;

      var parsedResponse = {

          productCode: response.outputParameter.productCode.$value,
          terminal: response.outputParameter.terminal.$value,
          transactionType: response.outputParameter.transactionType.$value,
          billNumber: response.outputParameter.billNumber.$value,
          amount: response.outputParameter.amount.$value,
          bit61: response.outputParameter.bit61.$value,
          reff: response.outputParameter.reff.$value,
          timeStamp: response.outputParameter.timeStamp.$value,
          resultCode: response.outputParameter.resultCode.$value,
          resultDesc: response.outputParameter.resultDesc.$value,
          bit39: response.outputParameter.bit39.$value,

          prevBalance: balance,

          sn: sn,
          st24message: st24message,

      }

      var combinedMessage = '';
  
      Object.keys(parsedResponse).forEach(function(key,index) {

          combinedMessage += key + ': ' + parsedResponse[key] + '; '

      });
      combinedMessage = combinedMessage.trim();
  
      parsedResponse.MESSAGE = combinedMessage;

      logger.info('Got result: ' + message, {response: response});

      callbackReport(task.requestId, st24rc, st24message + ' -- Prev Balance: ' + balance);

      pushResponseToMongoDb(task, {supplier: config.globals.gateway_name, raw: rawResponse, parsed: parsedResponse}, st24rc);

  }

  function createSignature(params, password) {

      var passwordHash = crypto.createHash('sha256').update(password).digest().toString('hex');

      var plain =

          params.userName

          + passwordHash

          + params.productCode
          + params.terminal
          + params.transactionType
          + params.billNumber
          + params.amount
          + params.reff
          + params.timeStamp;

      return crypto.createHash('sha1').update(plain).digest().toString('hex');

  }

  function createSignatureForSaldoCheck(params, password) {
      var passwordHash = crypto.createHash('sha256').update(password).digest().toString('hex');
      var plain =
          params.userName
          + passwordHash
          + params.productCode
          + params.terminal
          + params.transactionType
          + params.reff
          + params.timeStamp;
  
      return crypto.createHash('sha1').update(plain).digest().toString('hex');
  }

  function createBillNumber(destination) {
      return ("0000000000000" + destination).slice(-13);

  }
  
  exports.start = start;
  exports.topupRequest = topupRequest;

  exports.createSignature = createSignature;
  exports.createBillNumber = createBillNumber;