def main():

    the_dictionary = {}
    new_list = []
    depot_list = []
    dest_id = []
    horiz_dist = []
    bearing = []
    new_dictionary = []
    longitude = []
    latitude = []
    final_list = []

    dictionary_list = observatory_read_csv()
    depot_dictionary_list = depot_read_csv()

    for line in dictionary_list:
        depot_ID = line[1:]
        if depot_ID[0][0] == "D":
            new_list.append(depot_ID)

    new_list.sort()

    for line in depot_dictionary_list:
        lat_lon = line[0:][0:]
        depot_list.append(lat_lon)

    depot_list.sort()

    for line in new_list:
        dest_id.append(line[0])
        horiz_dist.append(line[1])
        bearing.append(line[2])

    dest_id.pop(-1)
    horiz_dist.pop(-1)
    bearing.pop(-1)

    for line in depot_list:
        latitude.append(line[1])
        longitude.append(line[2])

    longitude.pop(-1)
    latitude.pop(-1)

    final_list = [dest_id, horiz_dist, bearing, latitude, longitude]

    def get_values():
        d = float(final_list[1][0])
        brng = float(final_list[2][0])
        lat1 = float(final_list[3][0])
        lon1 = float(final_list[4][0])
        get_lat_lon(lat1, lon1, d, brng)
    get_values()


def get_lat_lon(lat1, lon1, d, brng):
    R = 6371.0 #Radius of the Earth

    lat1 = math.radians(lat1)
    lon1 = math.radians(lon1)
    brng = math.radians(brng)

    lat2 = math.asin( math.sin(lat1)*math.cos(d/R) + math.cos(lat1)*math.sin(d/R)*math.cos(brng))
    lon2 = lon1 + math.atan2(math.sin(brng)*math.sin(d/R)*math.cos(lat1), math.cos(d/R)-math.sin(lat1)*math.sin(lat2))

    lat2 = math.degrees(lat2)
    lon2 = math.degrees(lon2)

    return lat2, lon2






def depot_read_csv():
    my_data = open("depot_data.csv", 'rU', newline='')
    csv_data = csv.reader(my_data)
    depot_dictionary_list = list(csv_data)
    my_data.close()

    return depot_dictionary_list

def observatory_read_csv():

    my_data = open("observatory_data.csv", 'rU', newline='')
    csv_data = csv.reader(my_data)
    dictionary_list = list(csv_data)
    my_data.close()

    return dictionary_list

main()