import pandas
import random


# Functions go here
def make_statement(statement, decoration):
    """Emphasises headings by adding decoration at the start and
    and end"""

    return f"{decoration * 3} {statement} {decoration * 3}"


def string_check(question, valid_answers=('yes', 'no'),
                 num_letters=1):
    """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_answers:

            # check if the response is the entire word
            if response == item:
                return item

            # check if it's the first letter
            elif response == item[:num_letters]:
                return item

        print(f"Please choose an option from {valid_answers}")


def instructions():
    print(make_statement("Instructions", "ℹ️"))

    print('''
    
For each ticket holder enter ...
-Their name
-Their age
-The payment method (cash / credit)
    
The program will record the ticket sale and calculate the 
ticket cost (and the profit).
    
Once you have either sold all of the tickets or entered the 
exit code ('xxx'), the program will display the ticket 
sales information and write the data to a text file.

It will also choose one lucky ticket holder who wins the 
draw (their ticket is free).

    ''')


def not_blank(question):
    """Checks that a user response is not blank"""

    while True:
        response = input(question)

        if response != "":
            return response

        print("Sorry, this can't be blank. Please try again.\n")


def int_check(question):
    """Checks users enter an integer"""

    error = "Oops - please enter an integer."

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

        # check for the exit code
        if response == "xxx":
            return response

        try:
            # Change the response to an integer and check that its more than zero
            response = int(response)

            if response > 0:
                return response
            else:
                print(error)

        except ValueError:
            print(error)


def currency(x):
    """Formats numbers as currency ($#, ##)"""
    return "${:.2f}".format(x)


# Main routine goes here

# Initialise ticket numbers
MAX_TICKETS = 5
tickets_sold = 0

# initialise variables / non-default options for string checker
payment_ans = ('cash', 'credit')

# Ticket price list
CHILD_PRICE = 7.50
ADULT_PRICE = 10.50
SENIOR_PRICE = 6.50

# Credit card surcharge (currently 5%)
CREDIT_SURCHARGE = 0.05

# lists to hold all ticket details
all_names = []
all_ticket_costs = []
all_surcharges = []

mini_movie_dict = {
    'Name': all_names,
    'Ticket Price': all_ticket_costs,
    'Surcharge': all_surcharges
}

# program main heading
print(make_statement("Mini-Movie Fundraiser Program", "🍿"))

# Ask user if they want to see instructions
# display if necessary
print()
want_instructions = string_check("Do you want instructions? ")

if want_instructions == "yes":
    instructions()

print()

# loop to get name, age and payment details
while tickets_sold < MAX_TICKETS:
    # ask user for their name (and check if exit code)
    print()
    name = not_blank("Name: ")

    # if name is exit code, break out of loop
    if name == "xxx":
        break

        # Ask for their age and check it's between 12 and 120
    age = int_check("Age: ")

    # Output error message / success message
    if age < 12:
        print(f"{name} is too young")
        continue

    # Child ticket price is $7.50
    elif age < 16:
        ticket_price = CHILD_PRICE

    # Adult ticket ($10.50)
    elif age < 65:
        ticket_price = ADULT_PRICE

    # Senior citizen ticket ($6.50)
    elif age < 121:
        ticket_price = SENIOR_PRICE

    elif age > 120:
        print(f"{name} is too old")
        continue

    # ask user for payment method (cash / credit / ca / cr)
    pay_method = string_check("Payment method: ", payment_ans, 2)

    if pay_method == "cash":
        surcharge = 0

    # if by paying by credit, calculate surcharge
    else:
        surcharge = ticket_price * CREDIT_SURCHARGE

    # add name, ticket cost and surcharge to
    all_names.append(name)
    all_ticket_costs.append(ticket_price)
    all_surcharges.append(surcharge)

    tickets_sold += 1

# End of ticket loop!

# create dataframe / table from dictionary
mini_movie_frame = pandas.DataFrame(mini_movie_dict)

# Calculate the total payable and profit for each ticket
mini_movie_frame['Total'] = mini_movie_frame['Ticket Price'] + mini_movie_frame['Surcharge']
mini_movie_frame['Profit'] = mini_movie_frame['Ticket Price'] - 5

# Work out total paid and total profit...
total_paid = mini_movie_frame['Total'].sum()
total_profit = mini_movie_frame['Profit'].sum()

# choose random winner...
winner = random.choice(all_names)

# find index of winner (ie: position in list)
winner_index = all_names.index(winner)

# retrieve Total won
ticket_won = mini_movie_frame.at[winner_index, 'Total']
profit_won = mini_movie_frame.at[winner_index, 'Profit']

# Currency Formatting (uses currency function)
add_dollars = ['Ticket Price', 'Surcharge', 'Total', 'Profit']
for var_item in add_dollars:
    mini_movie_frame[var_item] = mini_movie_frame[var_item].apply(currency)

# Output movie frame without index
mini_movie_string = mini_movie_frame.to_string(index=False)

total_paid_string = f"Total Paid: ${total_paid:.2f}"
total_profit_string = f"Total profit: ${total_profit:.2f}"

adjusted_explanation = (f"We have given away a ticket worth ${ticket_won:.2f} which \n"
                        f"means our sales have decreased by ${ticket_won:.2f} and our \n"
                        f"profit decreased by ${profit_won:.2f}.")

# winner announcement
lucky_winner_string = (f"The lucky winner is {winner}. "
                       f"Their ticket worth ${ticket_won:.2f} is free!")
final_total_paid_string = f"Total Paid: ${total_paid - ticket_won:.2f}"
final_profit_string = f"Total profit: ${total_profit - profit_won:.2f}"

if tickets_sold == MAX_TICKETS:
    num_sold_string = make_statement(f"You have sold all the tickets "
                                     f"(ie: {MAX_TICKETS} tickets", "-")
else:
    num_sold_string = make_statement(f"You have sold {tickets_sold} / "
                                     f"{MAX_TICKETS} tickets.", "-")

# Additional strings / Headings
heading_string = make_statement("Mini Movie Fundraiser", "=")
tickets_details_heading = make_statement("Ticket Details", "-")
raffle_heading = make_statement("--- Raffle Winner ---", "-")
adjusted_sales_heading = make_statement("Adjusted Sales & Profit",
                                        "-")
adjusted_explanation = (f"We have given away a ticket worth ${ticket_won:.2f} which \n"
                        f"means our sales have decreased by ${ticket_won:.2f} and our \n"
                        f"profit decreased by ${profit_won:.2f}.")

# List of strings to be outputted / written to file
to_write = [heading_string, "\n",
            tickets_details_heading,
            mini_movie_string, "\n",
            total_paid_string,
            total_profit_string, "\n",
            raffle_heading,
            lucky_winner_string, "\n",
            adjusted_sales_heading,
            adjusted_explanation, "\n",
            final_total_paid_string,
            final_profit_string, "\n",
            num_sold_string]

# Print area
print()
for item in to_write:
    print(item)

# create file to hold data (add .txt extension)
file_name = "MMF_ticket_details"
write_to = "{}.txt".format(file_name)

text_file = open(write_to, "w+")

# write the item to file
for item in to_write:
    text_file.write(item)
    text_file.write("\n")