using PersonalityGenerator;

var isFinishedSession = false;

void GenerateTraits()
{
    // Prompt the user to enter traits they want to prioritize.
    Console.WriteLine("You can prioritize one or more traits to be above 8 by entering them.");
    Console.Write("Enter traits separated by commas (e.g., Outgoing, Nice), or press Enter to generate a random personality: ");
    
    // Read the user input and trim any leading or trailing whitespace.
    var prioritizedTraitsInput = Console.ReadLine()?.Trim();
    
    // Initialize a dictionary with predefined traits and their initial values set to 0.
    var traits = new Dictionary<string, int>
    {
        { "Outgoing", 0 },
        { "Nice", 0 },
        { "Playful", 0 },
        { "Neat", 0 },
        { "Active", 0 }
    };

    // Process the prioritized traits input:
    // 1. Split the input string by commas.
    // 2. Trim whitespace from each resulting trait.
    // 3. Filter out any empty or invalid traits (traits that are not in the predefined list).
    var prioritizedTraits = new HashSet<string>(prioritizedTraitsInput.Split(',')
        .Select(t => t.Trim()).Where(t => !string.IsNullOrEmpty(t) && traits.ContainsKey(t)));

    // Check if there are any prioritized traits provided by the user.
    if (prioritizedTraits.Count > 0)
    {
        // Assign values to the prioritized traits.
        TraitGenerator.AssignPrioritizedTraits(traits, prioritizedTraits);
    }
    else
    {
        // If no prioritized traits are provided, assign random values to all traits.
        TraitGenerator.AssignRandomTraits(traits);
    }

    // Display the generated personality traits.
    TraitGenerator.DisplayPersonality(traits);

    // Mark the session as finished.
    isFinishedSession = true;

    // Re-enter the session manager to allow for another session or to exit.
    SessionManager();
}

// Retrieves user input from the console with a given prompt.
string? GetUserInput(string prompt)
{
    Console.WriteLine(prompt);
    var input = Console.ReadLine();

    return input;
}

// Manages the personality generator session. It checks if a previous session is finished
// and prompts the user to either generate a new personality or exit the application.
void SessionManager()
{
    // Greet the user at the start of a new session only if the previous session wasn't finished.
    if (!isFinishedSession)
        Console.WriteLine("Welcome to the Sim Personality Generator!");

    // Define a message to prompt the user about generating a personality.
    // The message differs slightly if a previous session was already finished.
    var message = "Would you like to generate a random personality? [y/n]";
    if (isFinishedSession)
        message = "Would you like to generate a new personality? [y/n]";

    // Retrieve the user's input through a prompt specified by 'message'.
    var input = GetUserInput(message);

    // Convert the input to lowercase to handle user input in a case-insensitive manner.
    switch (input?.ToLower())
    {
        case "y":
            // Reset the session status if the previous session was finished.
            if (isFinishedSession)
                isFinishedSession = false;

            // Clear the console to provide a clean interface for generating a new personality.
            Console.Clear();

            // Generate a new set of personality traits
            GenerateTraits();
            break;

        default:
            // If the user enters anything other than 'y', terminate the application gracefully.
            Environment.Exit(Environment.ExitCode);
            break;
    }
}

SessionManager();