# python/Obit script to relabel the headers in VLSS images to J2000
# Arguments:
# 1) Name of Image to be updated
# 2) name of text file to copy to history

import sys, Obit, Image, History, OSystem, OErr

# Init Obit
err=OErr.OErr()
ObitSys=OSystem.OSystem ("Copyright", 1, 100, 0, [], 1, ["."], 1, 0, err)
OErr.printErrMsg(err, "Error with Obit startup")

inFile   = sys.argv[1]  # Get file name to update
textFile = sys.argv[2]  # Get file name of new text
inImage  = Image.newPFImage("Input image", inFile, 0, True, err)
OErr.printErr(err)

# Out with the old
inImage.Open(Image.READWRITE, err)
inHistory  = History.History("inhistory",  inImage.List, err)
inHistory.Open(History.READWRITE, err)
#inHistory.Stalin (1,10000,err)
inHistory.Zap (err)
#inHistory.Close(err)
inImage.Close(err)

# in with the new
inHistory  = History.History("inhistory",  inImage.List, err)
OErr.printErr(err)
inHistory.Open(History.READWRITE, err)
inHistory.TimeStamp(" Start Obit "+ObitSys.pgmName,err)

# Open text file
fd = open(textFile,"r")
recno = -1;
line = fd.readline().replace('\n',' ')

while line:
    #print line
    inHistory.WriteRec (recno, line, err)
    line = fd.readline().replace('\n',' ')

inHistory.Close(err)
fd.close()

outHistory  = History.History("inhistory",  inImage.List, err)
History. PCopy2Header (inHistory, outHistory, err)