#!/usr/bin/env python

"""

This program will launch a minimization job to the local PBS server. The

convention followed is to strip the suffix from the topology file and use

that as the prefix for all other output files. This program will append

".prod.xxxxx" for each file name, respectively. All trajectories are NetCDF

"""

from pbsjob import PBS_Script

import amber_simulations as am_sim

from optparse import OptionParser, OptionGroup

import os, sys

class ProductionError(Exception): pass

usage = '%prog [options] <prmtop> <inpcrd> [<cpin>]'

parser = OptionParser(usage=usage)

group = OptionGroup(parser, 'Timing Options',

'These options control how long the simulation is run')

group.add_option('--nstlim', dest='nstlim', default=50000, type='int',

help='Number of MD steps to run. Default 50000')

group.add_option('--print-frequency', dest='print_frequency', default=1000,

type='int', help='How frequently to print energies to ' +

'mdout, coordinates to trajectory, and 1/10th of the ' +

'frequency to print a restart file. Default 1000')

group.add_option('--dt', dest='dt', default=0.002, type='float',

help='Time step in fs. Default %default')

group.add_option('--cuda', dest='cuda', default=False, action='store_true',

help='Run this on pmemd.CUDA')

parser.add_option_group(group)

group = OptionGroup(parser, 'Temperature/Pressure Control',

'These options control the barostat and thermostat options')

group.add_option('--temp', dest='temp0', type='float', default=300.0,

help='Final target temperature. Default 300.0')

group.add_option('--thermostat', dest='thermostat', default='berendsen',

help="Thermostat to use. Allowed values are 'berendsen' " +

"and 'langevin'. Default 'berendsen'.")

group.add_option('--t-couple', dest='t_couple', default=10.0, type='float',

help='Temperature coupling parameter (tautp for berendsen, ' +

'gamma_ln for langevin). Default 10.0')

group.add_option('--barostat', dest='barostat', default='none',

help="Barostat to use. Allowed values are 'berendsen' and " +

"'none'. Default 'none'.")

group.add_option('--p-couple', dest='p_couple', default=10.0, type='float',

help='Pressure coupling parameter (taup). Default 10.0')

parser.add_option_group(group)

group = OptionGroup(parser, 'Implicit Solvent Options',

'These are the implicit solvation options')

group.add_option('--igb', dest='igb', default=5, type='int',

help='GB model to run for non-periodic systems. Must be ' +

'1, 2, 5, 7, or 8. Default 5')

parser.add_option_group(group)

group = OptionGroup(parser, 'Restraint Options',

'These options control cartesian restraints to be applied')

group.add_option('--restrain', dest='rst_wt', default=0, type='float',

help='Restraint weight to put on restraint mask. 0 means ' +

'no restraint. Default 0.')

group.add_option('--restraint-mask', dest='rst_mask', default='@CA,C,O,N',

help='Restraint mask for restrained minimization. Default ' +

'"@CA,C,O,N"')

parser.add_option_group(group)

group = OptionGroup(parser, 'Constant pH Options', 'These options control ' +

'the constant pH MD settings if a CPIN is provided')

group.add_option('--constpH', dest='solvph', default=7.0, type='float',

help='pH value to run constant pH simulation. Default 7.0.')

group.add_option('--ntcnstph', dest='ntcnstph', default=5, type='int',

help='Frequency of protonation change attempts. Default ' +

'every 5 time steps.')

group.add_option('--ntrelax', dest='ntrelax', default=500, type='int',

help='The number of steps to relax explicit solvent after ' +

'a protonation change. Default 500.')

parser.add_option_group(group)

group = OptionGroup(parser, 'File Naming Options', 'These options control ' +

'the file names generated by the simulation')

group.add_option('--label', dest='label', default='prod',

help='Label to apply after the prefix to output files. ' +

'Default "prod".')

parser.add_option_group(group)

group = OptionGroup(parser, 'PBS Options', 'These are the options given to ' +

'the scheduler when the job is submitted or the jobfile ' +

'is written')

group.add_option('--nproc', dest='nproc', default='1',

help='Number of processors to use. Fields are ,-delimited ' +

'and must fit into the processor-count format required by ' +

'the local PBS configuration')

group.add_option('--walltime', dest='walltime', default='30:00',

help='How long to ask PBS for resources. Default 30:00')

group.add_option('--name', dest='job_name', default=None,

help='Name to give to PBS job. None will give a random ' +

'Final Fantasy character name.')

group.add_option('--delay', dest='jobid', default=None,

help='If present, will delay the present job until after ' +

'the give job ID is complete successfully')

group.add_option('--force', dest='ask', default=True, action='store_false',

help='Do not ask confirmation before submitting.')

group.add_option('--ask', dest='ask', action='store_true',

help='Ask confirmation before submitting. Overrides ' +

'previous --force. Default behavior.')

group.add_option('--print-jobfile', dest='jobfile', default=None,

help='Print the PBS jobfile instead of submitting it ' +

'directly to the queue. Providing no name will bypass this ' +

'step.')

group.add_option('--pbs-nproc', dest='pbs_nproc', default=None,

help='In the case that --nproc is not applicable to allowed' +

' resource requests, this will be used for PBS instead.')

group.add_option('--queue', dest='pbs_queue', default=None,

help='To override the default queue in ~/.pbsdefaults')

group.add_option('--pbs-template', dest='pbs_template',

default=os.path.join(os.getenv('HOME'), '.pbsdefaults'),

help='PBS template file to use for job. Defaults to ' +

'~/.pbsdefaults')

group.add_option('--no-pbs', dest='pbs', default=True, action='store_false',

help='Just run using os.system(), not via PBS')

parser.add_option_group(group)

(opt, args) = parser.parse_args()

if not len(args) in [2,3]:

print >> sys.stderr, 'Bad command-line arguments!'

parser.print_help()

sys.exit(1)

amsys = am_sim.AmberSystem(args[0], args[1])

if not amsys.periodic() and not opt.igb in [1,2,5,7,8]:

raise ProductionError('Bad igb value (%d)' % opt.igb)

if opt.nstlim < 0:

raise ProductionError('Bad nstlim value (%d)' % opt.nstlim)

if len(args) == 2:

prod_input = am_sim.Production(amsys, nstlim=opt.nstlim, igb=opt.igb,

restrained=bool(opt.rst_wt),rst_wt=opt.rst_wt,

rst_mask=opt.rst_mask, temp0=opt.temp0,

thermostat=opt.thermostat,

thermostat_param=opt.t_couple,

barostat=opt.barostat,

barostat_param=opt.p_couple,

ntpr=opt.print_frequency,

ntwx=opt.print_frequency,

ntwr=opt.print_frequency * 10, dt=opt.dt)

else:

prod_input = am_sim.ConstantpH(amsys, nstlim=opt.nstlim, igb=opt.igb,

restrained=bool(opt.rst_wt),rst_wt=opt.rst_wt,

rst_mask=opt.rst_mask, temp0=opt.temp0,

thermostat=opt.thermostat,

thermostat_param=opt.t_couple,

barostat=opt.barostat,

barostat_param=opt.p_couple,

ntpr=opt.print_frequency,

ntwx=opt.print_frequency,

ntwr=opt.print_frequency * 10,

ntcnstph=opt.ntcnstph, ntrelax=opt.ntrelax,

solvph=opt.solvph, dt=opt.dt)

# Get the prefix

prefix = os.path.splitext(args[0])[0]

# Print the mdin file

prod_input.write_mdin('%s.%s.mdin' % (prefix, opt.label))

# Get the MPI command (mpiexec -n $NPROC, for example)

mpi_cmd = am_sim.get_mpi_cmd()

# Determine if we're doing parallel simulations

nproc = opt.nproc.split(',')

nproc = [int(i) for i in nproc]

parallel = False

for n in nproc:

if n > 1: parallel = True

# Set up the command string

if parallel:

if len(args) == 2:

if opt.cuda: prog_str = '%s pmemd.cuda.MPI -O' % mpi_cmd

else: prog_str = '%s pmemd.MPI -O ' % mpi_cmd

else: prog_str = '%s sander.MPI -O ' % mpi_cmd

else:

if len(args) == 2:

if opt.cuda: 'pmemd.cuda -O'

else: prog_str = 'pmemd -O '

else: prog_str = 'sander -O'

if opt.pbs:

# Make the PBS_Script instance

pbs_job = PBS_Script(template=opt.pbs_template)

# Change the queue if desired

if opt.pbs_queue: pbs_job.queue = opt.pbs_queue

# Set the PBS job name

pbs_job.set_name(opt.job_name)

# Determine processor count

nproc = opt.nproc.split(',')

nproc = [int(i) for i in nproc]

if not opt.pbs_nproc: pbs_nproc = nproc[:]

else:

pbs_nproc = opt.pbs_nproc.split(',')

pbs_nproc = [int(i) for i in pbs_nproc]

pbs_job.set_proc_count(pbs_nproc)

# Set walltime

pbs_job.set_walltime(opt.walltime)

cmd_str = ("%s -i %s.%s.mdin -p %s -c %s -r %s.%s.rst7 -o %s.%s." +

"mdout -inf %s.%s.mdinfo -x %s.%s.nc -suffix %s") % (prog_str,

prefix, opt.label, args[0], args[1], prefix, opt.label, prefix,

opt.label, prefix, opt.label, prefix, opt.label, prefix)

if opt.rst_wt:

cmd_str += " -ref %s" % args[1]

if len(args) == 3:

cmd_str += " -cpin %s -cpout %s.%s.cpout -cprestrt %s.%s.cpin" % (args[2],

prefix, opt.label, prefix, opt.label)

pbs_job.add_command(cmd_str)

# If we just want to print the jobfile

if opt.jobfile:

pbs_job.print_submit(opt.jobfile)

elif opt.ask:

pbs_job.submit_ask(after_job=opt.jobid)

else:

pbs_job.submit(after_job=opt.jobid)

else:

cmd_str = ("%s -i %s.%s.mdin -p %s -c %s -r %s.%s.rst7 -o %s.%s." +

"mdout -inf %s.%s.mdinfo -x %s.%s.nc -suffix %s") % (prog_str,

prefix, opt.label, args[0], args[1], prefix, opt.label, prefix,

opt.label, prefix, opt.label, prefix, opt.label, prefix)

if opt.rst_wt:

cmd_str += " -ref %s" % args[1]

if len(args) == 3:

cmd_str += " -cpin %s -cpout %s.%s.cpout -cprestrt %s.%s.cpin" % (args[2],

prefix, opt.label, prefix, opt.label)

os.system(cmd_str)