# PredictingChatbot.py
#
# Description: This Predicting Chatbot asks the user for their name and age
#              and predicts how old the user will be in x years.
#
# Author: AL
# Date: Feb. 2024

# Welcome and introduce the user to this Predicting Chatbot
print("Welcome to the Predicting Chatbot!")
print("This Bot predicts how old you will be in x years.")

# Ask the user for their name and age
print("Please, enter ... ")
name = input("\tyour name (letters): ")
age = input("\tyour age (an integer): ")

# Validate the name and the age
if name.isalpha():
    if age.isdigit():
        # Convert age from str to int
        age = int(age)
        
        # Ask the user for the number of years in the future for the prediction
        numYears = input("\tthe number of years (x) for the prediction: ")

        if numYears.isdigit():
            # Convert numYears from str to int
            numYears = int(numYears)
            
            # Predict how old the user will be in 13 years.
            print(f'\nDear {name}:')
            print(f'In {numYears} years, you will be {age+numYears} years old.')
        else:
            print(f'You entered an invalid number of years: {numYears}.')            
    else:
        print(f'You entered an invalid age: {age}.')
else:
    print(f'You entered an invalid name: {name}.')
    
print("Bye!")