''' Ensure variable is defined '''
try:
    DR_GROUP_ID
except NameError:
    def initialize_globals():
        global DR_GROUP_ID  # Create global variable when not defined
        global drg          # Create a data recording group variable
        DR_GROUP_ID = 0
        drg = []            # Initialize variable as an empty array
    initialize_globals()


def add_dr_group():
    global DR_GROUP_ID
    global drg
    group_name = "helios"
    drg.append( trick.DRBinary(group_name) )
    drg[DR_GROUP_ID].set_freq(trick.sim_services.DR_Always)
    drg[DR_GROUP_ID].single_prec_only = False
    drg[DR_GROUP_ID].enable()
    drg[DR_GROUP_ID].set_cycle(1.0)

    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.JD")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.declination")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.hour_angle")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.local_sidereal_time")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.observer_latitude")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.observer_longitude")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.observer_offset_from_UTC")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.right_ascension")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.sidereal_time_at_Greenwich")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.solar_azimuth")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.solar_elevation")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.local_time.day")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.local_time.hour")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.local_time.min")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.local_time.month")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.local_time.sec")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.local_time.year")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.utc.day")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.utc.hour")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.utc.min")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.utc.month")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.utc.sec")
    drg[DR_GROUP_ID].add_variable("sun_predictor.sun.utc.year")

    drg[DR_GROUP_ID].thisown = 0
    trick_data_record.drd.add_group( drg[DR_GROUP_ID], trick.DR_Buffer )
add_dr_group()


"""
add 1 to DR_GROUP_ID, THIS SETS DR_GROUP_ID UP
FOR THE NEXT DATA RECORDING FILE
"""
def increment_group_id():
    global DR_GROUP_ID
    DR_GROUP_ID += 1
increment_group_id()