#!/usr/bin/env python
#
# This script scans the FatesHistoryInterfaceMod.F90 file
# to list out all the variables that are default inactive.
# We use this to re-populate the AllVars regression test
# primarily.  Note flags to filter-in variables
# that are included in hydro, nitrogen or phosphorus
# active runs



import sys
import os
import argparse
import code  # For development: code.interact(local=locals())

def main():
    
    parser = argparse.ArgumentParser(description='Parse command line arguments to this script.')

    parser.add_argument('--f', '--input', dest='fnamein', type=str, help="Path to FatesHistoryInterfaceMod.F90", required=True)
    parser.add_argument('-hydro-active', action='store_true')
    parser.add_argument('-nitr-active', action='store_true')
    parser.add_argument('-phos-active', action='store_true')
    
    args = parser.parse_args()

    # Load up the pft names if they are there
    inactive_list = []
    file_obj = open(args.fnamein, "r")
    contents = file_obj.read()
    cont_split = contents.split('\n')

    hydro_excl = False
    nitr_excl = False
    phos_excl = False

    print('\n\nINACTIVE HISTORY VARIABLES: \n-------------------------------\n')

    
    for line_num,line_str in enumerate(cont_split):

        # Check to see if we encountered an exlusion flag

        if(not(args.hydro_active) and ('hydro_active_if' in line_str) ):
            if(hydro_excl):
                hydro_excl=False
            else:
                hydro_excl=True

        if(not(args.nitr_active) and ('nitrogen_active_if' in line_str) ):
            if(nitr_excl):
                nitr_excl=False
            else:
                nitr_excl=True

        if(not(args.phos_active) and ('phosphorus_active_if' in line_str) ):
            if(phos_excl):
                phos_excl=False
            else:
                phos_excl=True


        if(not(hydro_excl or nitr_excl or phos_excl)):
                
                
            if ('inactive' in line_str):
                # Work backwards until we find "vname"
                not_found = True
                srch_num = line_num
                count = 0
                while(not_found):
                    srch_num = srch_num-1
                    count = count+1
                    if('vname' in cont_split[srch_num]):
                        #print(cont_split[srch_num])
                        print('\'{}\','.format(cont_split[srch_num].split('\'')[1]))
                        not_found = False
                    
                    if(count>3):
                        not_found = False

    
    print('\n-------------------------------\n')
    
# =======================================================================================
# This is the actual call to main

if __name__ == "__main__":
    main()