import sys
import os
import casac
import string
import inspect
import pdb

from parameter_check import *

def tget(taskname=None, outfile=''):
	""" Get last input values from file on disk for a specified task: 

	taskname -- Name of task
		default: <unset>; example: taskname='bandpass'
		<Options: type tasklist() for the complete list>
	outfile -- Output file for the task inputs
		default: taskname.last then taskname.saved
		example: outfile=taskname.orion

	"""
        try:
		a=inspect.stack()
		stacklevel=0
		for k in range(len(a)):
			if (string.find(a[k][1], 'ipython console') > 0):
				stacklevel=k
				break
		myf=sys._getframe(stacklevel).f_globals
		if taskname==None: taskname=myf['taskname']
		myf['taskname']=taskname
		myf['taskname']=taskname
                if type(taskname)!=str:
                        taskname=taskname.__name__
		       	myf['taskname']=taskname
                        myf['taskname']=taskname
                parameter_checktype(['taskname','outfile'],[taskname,outfile],[str,str])
                parameter_checkmenu('taskname',taskname,['sdcal','sdfit','sdplot','sdstat'])
                parameter_checkmenu('taskname',taskname,['accum','almasimmos','bandpass','blcal','clean','clearplot','clrstat','concat','contsub','correct','deconvolve','exportfits','exportuvfits','feather','flagautocorr','flagdata','flagxy','fluxscale','fringecal','ft','gaincal','imhead','immoments','importvla','importasdm','importfits','importuvfits','clearcal','invert','listhistory','listobs','makemask','mosaic','mosaicmem','plotants','plotcal','plotxy','pointcal','regridimage','sdcal','sdfit','sdlist','sdplot','sdstat','smooth','setjy','split','uvmodelfit','viewer','browsetable','restore','initial'])

                ###Check if task exists by checking if task_defaults is defined
                if (myf.has_key(taskname+'_defaults') == False):
                        raise TypeError, "task %s is not defined " %taskname
                if taskname==None: taskname=myf['taskname']
                myf['taskname']=taskname
                f=zip(myf[taskname].func_code.co_varnames,myf[taskname].func_defaults)
                for j in range(len(f)):
                        k=f[j][0]
			stst = myf[k]
			if ( type(stst) == str ):
				sex = k+"='"+stst+"'"
			else:
				sex = k+"="+str(stst)
			exec(sex)
		if outfile=='':
			outfile=taskname+'.last'
			try:
				taskparameterfile=open(outfile,'r')
			except:
				outfile=taskname+'.saved'
				try:
					taskparameterfile=open(outfile,'r')
				except:
					print "ERROR - no taskname.last or .saved"
					return
		
			taskparameterfile.close()
		execfile(outfile)
		# Put the task parameters back into the global namespace
                f=zip(myf[taskname].func_code.co_varnames,myf[taskname].func_defaults)
                for j in range(len(f)):
                        k=f[j][0]
                        myf[k] = eval(k)
		print "Restored parameters from file "+outfile
        except TypeError, e:
                print "tget --error: ", e