#Purpose: Write a program that prompts users to pick either a seat or a #price.
#Mark sold seats by changing the price to 0. When a user specifies a seat, #make sure it is available.
#When a user specifies a price, find any seat with that price.

import csv
print("Welcome to TickeTron!")

# Format the text file
seats = open("tickets.txt", 'r')
seatsRead = open("tickets.txt", 'r').read()

# Convert the reader data into a formatted table/2d list (lines 18 to 24)
reader = csv.reader(seats)
seatsList = []
for row in list(reader):
    newRow = []
    # Add each seat into the row as an int
    for seat in row[0].split(" "):
        newRow.append(int(seat))
    # Add the row to the table
    seatsList.append(newRow)

# Convert a row index to an ascii row letter (EX: 0 -> A, 1 -> B, ...)
def rowToLetter(row):
    return chr(97+row)

# Convert a ascii row letter to a row index (EX: A -> 0, B -> 1, ...)
def letterToRow(letter):
    return ord(letter.lower())-97

# Get the seat price from the table with the highest number of digits
def getLongestSeatLength():
    largest = len(str(seatsList[0][0]))
    for row in seatsList:
        for seat in row:
            if len(str(seat)) > largest:
                largest = len(str(seat))
    return largest

# Print a table populated with the formatted text file
def printSeats():
    longest = getLongestSeatLength()
    numbers = "   "
    # Calculate the columns header for the table (1 2 3 4 5 6 7 8 9)
    for i in range(len(seatsList[0])):
        padding = longest-1
        numbers += " "*padding + str(i) + " "
    print(f"n{numbers}")

    for row in range(len(seatsList)):
        # Print the row header (A B C D E F G H I)
        print(chr(65+row) + "  ", end="")
        # Calculate the position of each seat in the table
        for seat in seatsList[row]:
            padding = longest-len(str(seat))
            print(" "*padding + str(seat), "", end="")
        print()
    print()

print("Here is a listing of all available seats:")

printSeats()

# Check if a seat is available for purchase (seat price is not zero in seatsList)
def seatAvailable(row, col):
    return seatsList[row][col] != 0

def purchaseSeat(seat, cost=-1):
    row = letterToRow(seat[0])
    col = int(seat[1])
    # Only run next lines if the seat is available and the price is equal to the required price
    if seatAvailable(row, col) and (cost == -1 or seatsList[row][col] == cost):
        print("Your seat is now at %s%d!" % (rowToLetter(row).upper(), col))
        seatsList[row][col] = 0
        printSeats()
        return True
    # Print an error if the seat is not available
    elif not seatAvailable(row, col):
        print("That seat is unavailable. Please try again.")
        return False
    # Print an error if the requested seat does not have the required price
    else:
        print("Seat %s%d is not worth $%d. Please try again." % (rowToLetter(row).upper(), col, cost))
        return False

def findSeat(seatsList):
    selection1 = " "
    # Continue asking the user to purchase a seat until selection1 is not empty
    while (selection1 != ""):
        selection1 = str(input("Would you like to purchase a specific seat? "))
        if selection1.lower() == "y" or selection1.lower() == "yes":
            seat = str(input("Please enter the specific seat you wish to purchase: "))
            # If the purchase is not successful, ask the user again
            if len(seat) > 2:
                print("Sorry, it seems you have entered an incorrect input.")
                continue
            if not purchaseSeat(seat):
                selection1 = " "
        elif selection1.lower() == "n" or selection1.lower() == "no":
            selection2 = str(input("Would you like to purchase a seat for a specific price? "))
            if selection2 == "y" or selection2 == "yes":
                price = int(input("Please enter the price you would like to pay: ").replace("$", ""))
                seat = str(input("Please enter the specific seat you wish to purchase: "))
                # If the purchase if not successful, ask the user again
                if not purchaseSeat(seat, price):
                    selection1 = " "
            else:
                selection1 = ""

findSeat(seatsList)
print("Very well, ending the program.")

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