import math

# coding workshop 30.9.2021!
print("Welcome!")

# when it comes to fractions, you can just let Python do the calculations
fraction = 4 / 3
result = 100 * fraction

# coding workshop 30.9.2021!
print("Welcome!")

# when it comes to fractions, you can just let Python do the calculations
fraction = 4 / 3
result = 100 * fraction

# you can ask this from user
# just remember to convert it to integer or float (int or float)
radius = 15

# V    =  4/3  ·    π    ·      r^3
volume = (4/3) * math.pi * math.pow(radius, 3)

# NEW FILE, tips for exercise 3.7

choice = input("Letter or parcel? (l/p):")

total_cost = 0
weight = input("Give the weight (grams):")
weight = int(weight)

if choice == 'l':
    print("User chose letter!")
    # here we should program the logic
    # when sending a letter!
    total_cost = total_cost + 0.5

    # here you can make if/elif/else -statements
    # for the weight classes (less than 200, 200-500 and 500+)

elif choice == 'p':
    print("User chose parcel!")
    # and here the logic user sends a parcel!

    # here you can make if/elif/else -statements
    # for the weight classes (less than 200, 200-500 and 500+)
else:
    print("Incorrect selection.")

print("Thank you for using our application!")

# NEW FILE

from datetime import datetime

# A BIGGER EXAMPLE, WHEN BOOLEANS ARE REALLY HELPFUL
# typically the case is that you have multiple conditions
# that are connected to each other or are otherwise complex

# this boolean keeps track of if the whether is good or not
# we assume it's good in the beginning
# the subsequent if-statements will try to prove this
# weather statement WRONG! :)
good_weather = True

# let's get current time (hour only)
now = datetime.now()
current_hour = now.strftime('%H')
current_hour = int(current_hour)

# we could ask these from user as well
temperature = 5
humidity = 88
wind_speed = 5
sun_goes_down_at = 20
sun_rises = 7

# OUR APPLICATION'S LOGIC:
# bad weather has temperature less than 10
# bad weather has humidity more than 80
# bad weather has wind speed more than 2.5
# bad weather, in this case, is when there is dark outside
# => if before midnight, is it between 20-24 or over midnight => before 7

# the easy conditions, temperature, humidity and wind_speed
# (just easy number comparisons!):
if temperature < 10:
    good_weather = False

if humidity > 80:
    good_weather = False

if wind_speed > 2.5:
    good_weather = False

# this is the tricky if-statement
# is the current hour between 20 and 24
if sun_goes_down_at < current_hour < 24:
    good_weather = False
else:
    # before morning
    if current_hour < sun_rises:
        good_weather = False

# HERE'S SOME CODE THAT DOESN'T WORK, BUT GIVES YOU AN IDEA
# WHY THIS GETS A BIT TOO DIFFICULT TO DO WITHOUT BOOLEANS

# ....so, how to check the current_hour in two separate occasions =>
# if it's before midnight, or if after midnight, is it before the morning?
# if temperature < 10 and humidity > 80 and wind_speed > 2.5 and
#     (current_hour > sun_goes_down_at ....? HOW TO EVEN DO THIS????
#     print("Bad weather!")

# but since we actually use a boolean, the last condition
# is fairly simple :)
if good_weather:
    print("Good weather!")
else:
    print("Bad weather!")