import math

# functions go here...
def make_statement(statement, decoration, lines):
    """Creates headings (3 lines), subheadings (2 lines) and
    emphasised text / mini-headings (1 line).  Only use emoji for
    single line statements"""

    middle = f"{decoration * 3} {statement} {decoration * 3}"
    top_bottom = decoration * len(middle)

    if lines == 1:
        print(middle)
    elif lines == 2:
        print(middle)
        print(top_bottom)

    else:
        print(top_bottom)
        print(middle)
        print(top_bottom)
def yes_no(question):

    """Checks that users enter yes / y or no / n to a question"""

    while True:
        response = input(question).lower()

        if response == "yes" or response == "y":
            return "yes"
        elif response == "no" or response == "n":
            return "no"
        else:
            print("Please enter yes (y) or no (n).\n")
# Functions go here
def string_check(question, valid_ans_list, num_letters):
    """Checks that users enter the full word
    or the 'n' letter/s of a word from a list of valid responses"""

    while True:

        response = input(question).lower()

        for item in valid_ans_list:
            if response == item:
                return item

            elif response == item[:num_letters]:
                return item
        print(f"Please choose an option from the list {valid_ans_list}")
# Functions go here
def int_check(question, low, high ):


    error = f"Oops - please enter an number that is higher or equal to {low} and lower or equal to {high} ."


    while True:

       try:
           response = float(input(question))

           if low <= response and high >= response:
                return response


           else:
               print(error)

       except ValueError:
           print(error)

want_instructions = yes_no("Do you want to read the instructions? (type 'exit' to quit): ")
if want_instructions == "yes" or want_instructions == "y":
    make_statement("Instructions", "=", 3)
    print()
    make_statement("Pick either area or perimeter, then choose your shape and input the sizes of the sides!", "-", 2)
    print()
    make_statement("The calculator will find the area or perimeter as well as showing you what equation it used", "!",
                   1)
    shape_list = ['circle', 'square', 'rectangle', 'parralelogram']

    shape_select = string_check("Pick a shape: ", shape_list, 1)
    print(f"You chose {shape_select}")

    if shape_select == shape_list[0]:
        radius = int_check("Enter radius: ", 0.1, 100)

        circumfrence = 2 * math.pi * radius
        area = math.pi * radius * radius
        print(f"Circumference: {circumfrence:.2f} ")
        print(f"Area: {area:.2f} ")
    elif shape_select == shape_list[1]:
        length = int_check("enter the size of your side: ", 0.1, 100)
        area = (length * length)
        perimeter = (length + length + length + length)

        print(f"The area of the square is: {area}")
        print(f"The perimeter of the square is: {perimeter}")
    elif shape_select == shape_list[2]:
        first_length = int_check("enter the size of your first side: ", 0.1, 100)
        second_length = int_check("enter the size of your second side: ", 0.1, 100)
        area = (first_length * second_length)
        perimeter = (first_length + first_length + second_length + second_length)
        print(f"The area of the square is: {area}")
        print(f"The perimeter of the square is: {perimeter}")
    elif shape_select == shape_list[3]:
        length = int_check("enter the size of your side: ", 0.1, 100)
        height = int_check("enter the height of your shape: ", 0.1, 100)
        area = (length * height)
        perimeter = (length + length + length + length)

        print(f"The area of the parralelogram is: {area}")
        print(f"The perimeter of the parralelogram is: {perimeter}")
    else:
        print("Please choose an option from the list")

elif want_instructions == "no" or want_instructions == "n":
    print("you chose no")
elif want_instructions == "exit" or want_instructions == "e":
        break
else:
    print("please enter yes or no")
shape_list = ['circle', 'square', 'rectangle', 'parralelogram']

shape_select = string_check("Pick a shape: ", shape_list, 1)
print(f"You chose {shape_select}")

if shape_select == shape_list[0]:
    radius = int_check("Enter radius: ",0.1,100)

    circumfrence = 2 * math.pi * radius
    area = math.pi * radius * radius
    print(f"Circumference: {circumfrence:.2f} ")
    print(f"Area: {area:.2f} ")
elif shape_select == shape_list[1]:
    length = int_check("enter the size of your side: ",0.1,100)
    area = (length * length)
    perimeter = (length + length + length + length)

    print(f"The area of the square is: {area}")
    print(f"The perimeter of the square is: {perimeter}")
elif shape_select == shape_list[2]:
    first_length = int_check("enter the size of your first side: ",0.1,100)
    second_length = int_check("enter the size of your second side: ",0.1,100)
    area = (first_length * second_length)
    perimeter = (first_length + first_length + second_length + second_length)
    print(f"The area of the square is: {area}")
    print(f"The perimeter of the square is: {perimeter}")
elif shape_select == shape_list[3]:
    length = int_check("enter the size of your side: ",0.1,100)
    height = int_check("enter the height of your shape: ",0.1,100)
    area = (length * height)
    perimeter = (length + length + length + length)

    print(f"The area of the parralelogram is: {area}")
    print(f"The perimeter of the parralelogram is: {perimeter}")
else:
    print("Please choose an option from the list")