# -*- coding: utf-8 -*-

#For use with W+2jets at NLO w/ FxFx merging
#A. Wisecarver, 14.12.2017
#Produces LHE files that are then immediately hadronized/PS’d by Pythia to produce GEN output
#(i.e. both externalLHEProducer then generator modules)
#qCut parameters based on Apichart’s 2015 W+jets measurement

import FWCore.ParameterSet.Config as cms

externalLHEProducer = cms.EDProducer("ExternalLHEProducer",
    args = cms.vstring('/afs/cern.ch/work/a/awisecar/MadGraph5Gen/CMSSW_8_0_20/src/Gridpacks/wellnu2j_5f_NLO_FXFX_as_0108_slc6_amd64_gcc481_CMSSW_7_1_30_tarball.tar.xz'),    
    nEvents = cms.untracked.uint32(5000),
    numberOfParameters = cms.uint32(1),
    outputFile = cms.string('cmsgrid_final.lhe'),
    scriptName = cms.FileInPath('GeneratorInterface/LHEInterface/data/run_generic_tarball_cvmfs.sh')
)
#Link to datacards:
#https://github.com/cms-sw/genproductions/tree/354d938586a1d54e8220f0b84629a81fa72e9b51/bin/MadGraph5_aMCatNLO/cards/production/13TeV/WJToLNu_NLO

from Configuration.Generator.Pythia8CommonSettings_cfi import *
from Configuration.Generator.Pythia8CUEP8M1Settings_cfi import *
from Configuration.Generator.Pythia8aMCatNLOSettings_cfi import *

generator = cms.EDFilter("Pythia8HadronizerFilter",
    maxEventsToPrint = cms.untracked.int32(1),
    pythiaPylistVerbosity = cms.untracked.int32(1),
    filterEfficiency = cms.untracked.double(1.0),
    pythiaHepMCVerbosity = cms.untracked.bool(False),
    comEnergy = cms.double(13000.),
    PythiaParameters = cms.PSet(
        pythia8CommonSettingsBlock,
        pythia8CUEP8M1SettingsBlock,
        pythia8aMCatNLOSettingsBlock,
        processParameters = cms.vstring(
            'JetMatching:setMad = off',
            'JetMatching:scheme = 1',
            'JetMatching:merge = on',
            'JetMatching:jetAlgorithm = 2',
            'JetMatching:etaJetMax = 999.',
            'JetMatching:coneRadius = 1.',
            'JetMatching:slowJetPower = 1',
            'JetMatching:qCut = 30.', #this is the actual merging scale
            'JetMatching:doFxFx = on',
            'JetMatching:qCutME = 10.',#this must match the ptj cut in the lhe generation step
            'JetMatching:nQmatch = 5', #4 corresponds to 4-flavour scheme (no matching of b-quarks), 5 for 5-flavour scheme
            'JetMatching:nJetMax = 2', #number of partons in born matrix element for highest multiplicity
            'TimeShower:mMaxGamma = 4.0',
        ),
        parameterSets = cms.vstring('pythia8CommonSettings',
                                    'pythia8CUEP8M1Settings',
                                    'pythia8aMCatNLOSettings',
                                    'processParameters',
                                    )
    )
)