#!/usr/bin/env python

import subprocess
import tempfile
import os
import shutil
import sys

# This script is called by ACEDB Pick_me_to_call records.
# It copies the file to a temporary file in the current working directory, 
# and then runs the appropriate viewer. After viewing, the 
# temporary file is deleted.  
# $ACE_Viewer is the name of the program. 
# $1 is the file for the program to use.

""" ensure that there are enough command line arguments to parse """
if len(sys.argv) < 2:
    print("Missing FILE parameter");
    print("");
    print("Usage: acePSviewer.py  FILE");
    exit();

""" get the FILE to open (the first command line argument) """
file_in = sys.argv[1]

if not os.path.exists(file_in):
    print "File \"" + file_in + "\" not found!"

#Choose a .pdf viewer
if os.environ.get("ACE_PS_COMMAND"):
    ACE_PS_COMMAND = os.environ.get("ACE_PS_COMMAND")
else:
    os.putenv("ACE_PS_COMMAND", "gv")
    ACE_PS_COMMAND = "gv"

#print 'ACE_PS_COMMAND: ' + ACE_PS_COMMAND
print "Copying " + file_in

temp_file = tempfile.mkstemp("acedb_", ".ps")

if temp_file and len(temp_file) > 1:
    shutil.copyfile(file_in, temp_file[1])
    subprocess.call([ACE_PS_COMMAND, temp_file[1]])
    os.remove(temp_file[1])
else:
    print "Error creating temp file"