# -----------------
# Copyright © 2022 ACK Cyfronet AGH, Poland.
# -----------------
#
# Sample function created for demonstration of creating custom applications functionality
# See also https://docs.cyfronet.pl/display/ISDOC/Creating+Custom+Applications

import numpy as np
import matplotlib.pyplot as plt

def main(numbers_file, multiplier):
    """
    Example Python application that reads the given numbers_file and multiplies
    the content (numbers) by the supplied multiplier
    Arguments:
        numbers_file: path to input file of type 'text_data'
        multiplier: number by which the array of numbers is multiplied
    Returns:
        A file named 'multiplied_numbers_plot.png' containing a plot of multiplied 
        numbers.
    """

    numbers = np.genfromtxt(numbers_file, comments="#", delimiter=",", unpack=False)
    numbers = numbers[~np.isnan(numbers)]
    numbers = np.array(numbers).flatten()
    multiplied_numbers = numbers * multiplier
    plt.figure()
    plt.plot(multiplied_numbers)
    plt.savefig('multiplied_numbers_plot.png')