import FWCore.ParameterSet.Config as cms
import os

source = cms.Source("EmptySource")
_generator = cms.EDFilter("SherpaGeneratorFilter",
  maxEventsToPrint = cms.int32(0),
  filterEfficiency = cms.untracked.double(1.0),
  crossSection = cms.untracked.double(-1),
  SherpaProcess = cms.string('WJetsToLNu_inclusive_slc7_amd64_gcc700'),
  SherpackLocation = cms.string('/cvmfs/cms.cern.ch/phys_generator/gridpacks/slc7_amd64_gcc700/13TeV/sherpa/2.2.11'),
  SherpackChecksum = cms.string('67636f1541fcc3341c9a20cb50df04e5'),
  FetchSherpack = cms.bool(True),
  SherpaPath = cms.string('./'),
  SherpaPathPiece = cms.string('./'),
  SherpaResultDir = cms.string('Result'),
  SherpaDefaultWeight = cms.double(1.0),
  SherpaParameters = cms.PSet(parameterSets = cms.vstring(
                             "MPI_Cross_Sections",
                             "Run"),
                              MPI_Cross_Sections = cms.vstring(
				" MPIs in Sherpa, Model = Amisic:",
				" semihard xsec = 39.7532 mb,",
				" non-diffractive xsec = 17.0318 mb with nd factor = 0.3142."
                                                  ),
                              Run = cms.vstring(
				" (run){",
				" EVENTS 10K; ERROR 0.99;",
				" MAX_PROPER_LIFETIME: 10.0",
				" HEPMC_TREE_LIKE: 1",
				" HEPMC_USE_NAMED_WEIGHTS=1",
				" PRETTY_PRINT: Off",
				" OVERWEIGHT_THRESHOLD: 10",
				" MC@NLO:",
				" HPSMODE: 0",
				" FSF:=1.; RSF:=1.; QSF:=1.;",
				" SCALES STRICT_METS{FSF*MU_F2}{RSF*MU_R2}{QSF*MU_Q2};",
				" SCALE_VARIATIONS 0.25,0.25 0.25,1. 1.,0.25 1.,1. 1.,4. 4.,1. 4.,4.;",
				" OL_PARAMETERS=ew_scheme 2 ew_renorm_scheme 1",
				" ASSOCIATED_CONTRIBUTIONS_VARIATIONS=EW EW|LO1 EW|LO1|LO2 EW|LO1|LO2|LO3;",
				" EW_SCHEME=3",
				" GF=1.166397e-5",
				" METS_BBAR_MODE=5",
				" # Shower improvements",
				" NLO_SUBTRACTION_SCHEME=2;",
				" NJET:=4; LJET:=2,3,4; QCUT:=20.;",
				" ME_SIGNAL_GENERATOR Comix Amegic LOOPGEN;",
				" OL_PREFIX=/cvmfs/cms.cern.ch/slc7_amd64_gcc700/external/openloops/2.1.2-82e96d2ec79444a634a9212a94577ce5",
				" EVENT_GENERATION_MODE PartiallyUnweighted;",
				" LOOPGEN:=OpenLoops;",
				" # speed and neg weight fraction improvements",
				" PP_RS_SCALE VAR{sqr(sqrt(H_T2)-PPerp(p[2])-PPerp(p[3])+MPerp(p[2]+p[3]))/4};",
				" NLO_CSS_PSMODE 1;",
				" BEAM_1 2212; BEAM_ENERGY_1 = 6500.;",
				" BEAM_2 2212; BEAM_ENERGY_2 = 6500.;",
				" PDF_LIBRARY LHAPDFSherpa;",
				" PDF_SET NNPDF30_nnlo_as_0118;",
				" PDF_VARIATIONS NNPDF30_nnlo_as_0118[all];",
				"}(run)",
				" (processes){",
				" Process 93 93 -> 90 91 93{NJET};",
				" Order (*,2); CKKW sqr(QCUT/E_CMS);",
				" Associated_Contributions EW|LO1|LO2|LO3 {LJET};",
				" Enhance_Function VAR{max(pow(sqrt(H_T2)-PPerp(p[2])-PPerp(p[3]),2),PPerp2(p[2]+p[3]))/400.0} {3,4,5,6,7}",
				" NLO_QCD_Mode MC@NLO {LJET};",
				" ME_Generator Amegic {LJET};",
				" RS_ME_Generator Comix {LJET};",
				" Loop_Generator LOOPGEN {LJET};",
				" Max_N_Quarks 4 {6,7};",
				" Max_Epsilon 0.01 {6,7};",
				" Integration_Error 0.99 {3,4,5,6,7};",
				" End process;",
				"}(processes)",
				" (selector){",
				" Mass 11 -12 1. E_CMS",
				" Mass 13 -14 1. E_CMS",
				" Mass -11 12 1. E_CMS",
				" Mass -13 14 1. E_CMS",
				" Mass -15 16 1. E_CMS",
				" Mass 15 -16 1. E_CMS",
				"}(selector)"
                                                  ),
                             )
)

from GeneratorInterface.Core.ExternalGeneratorFilter import ExternalGeneratorFilter
generator = ExternalGeneratorFilter(_generator)
ProductionFilterSequence = cms.Sequence(generator)