#! /usr/bin/env python
import os
import random
import sys

# This script helps you to prepare and submit CMSSW
# MC generation jobs to the SPRACE cluster. It submits
# only ONE job per CONDOR cluster.

# Get parameters from command line
if len(sys.argv) != 4:  # the program name and the config file
	# stop the program and print an error message
	sys.exit("Usage: sprace_ALPGEN_submit.py <config file> <executable name> <grid name>")

# Set parameters to the job
###############################################
configargname = sys.argv[1]
executableargname = sys.argv[2]
gridargname = sys.argv[3]
dryrun = 0
###############################################

if dryrun != 0:
	print "*** DRY RUN *** (change to dryrun = 0 to really run)"
	
# Getting the label
################################################
f = open(configargname,'r')
f.readline()
secondline = f.readline()
f.close()
label = secondline.split()[0]
taskname = label

# Prepare working directory 
################################################
pwd = os.getcwd()
workingdir = pwd+"/"+taskname+"_dir"
if not os.path.exists(workingdir):
	os.mkdir(workingdir)

# Make a nice random seed
################################################
os.system("uuidgen > seedfile")
seedfile = open("seedfile",'r')
myseed = seedfile.readline()
seedfile.close()
os.system("\\rm seedfile")
random.seed(myseed)

# Generate the task.
################################################                                            

# Prepare the input scripts
rundir = workingdir
submitname = rundir+"/"+taskname+".src"
shellname = rundir+"/"+taskname+".sh"
configname = rundir+"/"+taskname+".input"
gridname = rundir+"/"+taskname+".grid2"

# Prepare the executable
executablename = rundir+"/"+taskname+"_exe"

# The submit file
submitfile = open(submitname,'w')
submitfile.write("universe       = vanilla\n")
submitfile.write("executable     = "+shellname+"\n")
submitfile.write("initialdir     = "+rundir+"\n")
submitfile.write("output         = "+rundir+"/STDOUT\n")
submitfile.write("error          = "+rundir+"/STDERR\n")
submitfile.write("log            = "+rundir+"/LOGFILE\n")
submitfile.write("queue\n")
submitfile.close()

# The shell file
shellfile = open(shellname,'w')
shellfile.write("#!/bin/bash\n")
shellfile.write(executablename+" < "+configname+"\n")
shellfile.close()

# Copy the executable to the right place
os.system("cp "+executableargname+" "+executablename)
# The Alpgen config file
os.system("cp "+configargname+" "+configname)
# The Alpgen grid file
os.system("cp "+gridargname+" "+gridname)

# Create and submit the task.
################################################   
if dryrun != 0:
	os.system("echo condor_submit "+submitname)
else:
	os.system("echo condor_submit "+submitname)
	os.system("chmod +x "+shellname)
	os.system("condor_submit "+submitname)