# Introduction to Programming, functions, 25.11.2024
print("Welcome!")

# functions.py, this file contains
# the definitions of all our own functions
# kinda like a toolkit!

# define a function show_text()
# => run this code, if somebody
# happened to call this function
# somewhere else
def show_text():
    print("Welcome to our app!")
    print("-------------------")
    print("Please follow instructions.")
    print()


# another function: combine_text
# three parameters: first name, surname and age
def combine_text(first, last, age):
    print(f"Welcome: {first} {last}")
    print(f"You are {age} years old.")


# define a function that returns data
# => remember to save the result into a variable
def get_year():
    result = 2024
    return result


# define a function that determines if number
# is odd or even
def get_even_number_text(number):
    if number % 2 == 0:
        return "Even"
    else:
        return "Odd"


# define a function that counts
# days within hours and returns the result
def hours_to_days(hours):
    result = hours // 24
    return result


# define a function that reverses a string
# this is a handy way to hide the weird
# Python way which reverses the string
def reverse_string(text):
    return text[::-1]


# define a function that checks if the given
# text is a palindrome or not
# (text is identical also when reversed)
def check_palindrome(text):
    reversed_text = reverse_string(text)

    # check if text is identical also while reversed,
    # return a boolean
    if text == reversed_text:
        return True
    else:
        return False


# define a function that checks if the given
# order code follows the needed pattern
# exactly 10 characters long, first letter is T
def check_order(code):
    result = True

    # condition 1: length has to be exactly 10
    if len(code) != 10:
        result = False

    # condition 2: first letter has to be T
    if code[0] != "T":
        result = False

    return result


# define a helper function that prints
# the content of a list for us
def show_list(data):

    # loop through the list and print content
    for word in data:
        print(f"{word}")


# define a helper function
# that calculates the average of any
# given numeric list
def get_list_average(numbers):
    total = sum(numbers)
    amount = len(numbers)

    # calculate average and round
    result = total / amount
    result = round(result, 1)
    return result


###########################################
# ACTUAL CODE FILES AFTER THIS

from functions import *

# call our own function from functions.py
show_text()

print()

# call our own function with parameters
combine_text("John", "Doe", 31)

# NEW FILE

from functions import *

# call a function that returns a value
year = get_year()
print(year)

# NEW FILE

from functions import *

# ask the number from user
value = input("Give a number:\n")
value = int(value)

# use our own function to decide if number is odd/even
result = get_even_number_text(value)
print(result)

# NEW FILE

from functions import *

# reverse the text from user
text = input("Give a text:\n")
result = reverse_string(text)
print(result)

# NEW FILE

from functions import *

# ask the hours from user and convert
# them into number of days
hours = input("How many hours?\n")
hours = int(hours)

days = hours_to_days(hours)
print(f"{days} days in total.")

# NEW FILE

from functions import *

text = input("Give a word:\n")

# use our own function to check
# if this text is palindrome or not
result = check_palindrome(text)

# check the boolean that
# our functions returns
if result:
    print("Palindrome!")
else:
    print("Not a palindrome...")

# NEW FILE

from functions import *

# ask user for an order code
text = input("Give an order code:\n")

# use our function to check if the code
# has the required features (validation function)
result = check_order(text)

# interpret the result
if result:
    print("Code OK!")
else:
    print("Code not OK...")

# NEW FILE

from functions import *

# some list data
cities = ["Rovaniemi", "Helsinki", "Oulu", "Stockholm"]

# call our own helper function that prints the contents of a list
show_list(cities)

# NEW FILE

from functions import *

# three different lists for calculating the averages
values = [5, 6, 8, 3, 4, 7, 8, 6]
grades = [0, 3, 2, 5, 4, 3, 4, 5, 3, 4]
temperatures = [-5.6, -3.2, -11.8, -7.8]

# use our own helper function for all three lists separately
average = get_list_average(values)
print(f"Average: {average}")

average = get_list_average(grades)
print(f"Average: {average}")

average = get_list_average(temperatures)
print(f"Average: {average}")