import os

from stsci.tools import teal
from stsci.tools import parseinput

import stwcs
from stwcs.wcsutil import headerlet

__taskname__ = __name__.split('.')[-1] # needed for help string
__package__ = headerlet.__name__
__version__ = stwcs.__version__
#
#### Interfaces used by TEAL
#
def getHelpAsString(docstring=False):
    """
    return useful help from a file in the script directory called __taskname__.help
    """
    install_dir = os.path.dirname(__file__)
    htmlfile = os.path.join(install_dir,'htmlhelp',__taskname__+'.html')
    helpfile = os.path.join(install_dir,__taskname__+'.help')
    if docstring or (not docstring and not os.path.exists(htmlfile)):
        helpString = __taskname__+' Version '+__version__+'\n\n'
        if os.path.exists(helpfile):
            helpString += teal.getHelpFileAsString(__taskname__,__file__)
        else:
            helpString += eval('.'.join([__package__,__taskname__,'__doc__']))
    else:
        helpString = 'file://'+htmlfile

    return helpString

def run(configObj=None):

    if configObj['hdrname'] == '' and configObj['hdrext'] is None and \
        configObj['distname'] == '':
        print '='*60
        print 'ERROR:'
        print '    No valid "hdrname", "hdrext" or "distname" parameter value provided!'
        print '    Please restart this task and provide a value for one of these parameters.'
        print '='*60
        return
    filename = parseinput.parseinput(configObj['filename'])[0]
    # Call function with properly interpreted input parameters
    # Syntax: delete_headerlet(filename, hdrname=None, hdrext=None, distname=None)
    headerlet.delete_headerlet(filename,
                                hdrname = configObj['hdrname'],
                                hdrext = configObj['hdrext'],
                                distname = configObj['distname'],
                                logging = configObj['logging'])