/*
|__________________________________________________________________________________________________________________________________|
-METHS- [Text Analyzer Program]

Summary:

- Methods -
- Overloading -
- Optional Parameters -

Goal: Write a program that will analyze text.

Instructions: Write a function that will take a string parameter with "Hello" as the default value for the optional parameter.

This function will count the number of words in the string.
    - Assume that a word is identified by a single space character.
    - The return is the count of words.

Overload the above function by allowing it to take an array of strings:
    - There must be two separate functions.

Write a function that will count the number of vowels in a string:
    - The return is the count of vowels, case-insensitive.

Create a menu system similar to the sample output:
    - When at the bottom of each menu level, continue to perform the same operation until the user inputs the escape sequence. i.e. -1
|__________________________________________________________________________________________________________________________________|
*/


using System; // Spin up .NET libraries
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Meths_Text_Analyzer
{
    class Program                           // Default Class named Program
    {
        static void Main(string[] args)     // Enter Main:
        {

            bool currently_Counting = true; // Setup a bool for the while loop default condition below:

            while (currently_Counting)      // While currently_Counting bool is true, run the code below:

            {

                Console.WriteLine("\nChoose from the following:"); // Setup Menu Options to user:
                Console.WriteLine("1. Word counting.");
                Console.WriteLine("2. Vowel counting.");
                Console.WriteLine("3. Exit");
                Console.Write("Enter your selection: ");

                int user_Input = int.Parse(Console.ReadLine());    // Declare an int based on user input named user_Input.

                switch (user_Input)                                // Switch to test a single expression againt multiple conditions for purposes of filling out menu options:
                {
                    case 1: // (1. Word counting.) Condition for Word Counter Menu chosen:

                        Console.WriteLine("\nChoose from the following:");          // Menu Options to user for Word Counter Menu:
                        Console.WriteLine("1. Count the words in one sentence.");
                        Console.WriteLine("2. Count the words in a paragraph.");
                        Console.WriteLine("3. Parent menu.");
                        Console.Write("Enter your selection: ");

                        user_Input = int.Parse(Console.ReadLine());                 // Update user_Input to the new user choice for case evaluation.

                        switch (user_Input)                                         // Switch statement based on user_Input
                        {
                            case 1: // (1. Count the words in one setence.) Condition for counting the words in one sentence:

                                Console.WriteLine("Enter a sentence: (type q to quit, or type d for default):");
                                Console.WriteLine(Word_Counter(Console.ReadLine()));                // Call the Word_Counter method, which splits the string and returns the count as an int into the Console.
                                break;

                            case 2: // (1. Count the words in one paragraph.) Condition for counting the words in one paragraph:

                                Console.WriteLine("Enter a paragraph (q to quit):");

                                Console.WriteLine(Word_Counter(ReadParagraph().Split()));           // Call the overloaded Method Word_Counter, which takes the words of the paragraph and places them into an array of strings.
                                break;
                        }

                        break;

                    case 2: // (2. Vowel counting.) Condition for vowel counting menu chosen:

                        Console.WriteLine("\n1. Count the vowels in one sentence.");
                        Console.WriteLine("2. Count the vowels in one paragraph.");
                        Console.WriteLine("3. Exit.");
                        Console.Write("Enter your selection: ");

                        user_Input = int.Parse(Console.ReadLine());                                 // Update user_Input to the new user choice for evaluation.

                        switch (user_Input)                                                         // Another switch statement which evaluates user_Input
                        {
                            case 1:

                                Console.WriteLine("Enter a sentence:");
                                Console.WriteLine(Vowel_Count(Console.ReadLine()));                 // Call the Vowel_Count method
                                break;

                            case 2:

                                Console.WriteLine("Enter a paragraph (type q to quit):");
                                Console.WriteLine(Vowel_Count(ReadParagraph()));                    // Call the Vowel_Count Method and pass ReadParagraph Method into it.
                                break;
                        }

                        break;

                    default:
                        currently_Counting = false; // Pass the bool into the default.
                        break;
                }
            }
        }

        static int Word_Counter(string input = "Hello") // Method named Word_Counter which returns int and takes string named input which is set to "Hello" by default
        {
            return input.Split().Length;                // Split the input string string into an array of length word count which returns the length of the array/# of words.
        }

        static int Word_Counter(string[] input)         // Method named Word_Counter which returns the Length of the string
        {
            return input.Length;
        }

        static int Vowel_Count(string input)            // Method named Vowel_Count which returns int and takes a string named input. If the string contains a vowel, it splits the array.
        {

            return System.Text.RegularExpressions.Regex.Split(input, "[AaEeIiOoUu]").Length - 1; // This splits the string using Regex funtion, and trims the length

        }

        static string ReadParagraph()                   // Method
        {
            string result = System.String.Empty;        // Large string which is returned
            string input;                               // Current line which is being read
            bool can_Continue = true;                   // Setup a bool to allow the Paragraph parser to continue


            do
            {
                input = Console.ReadLine().Trim();     // Check for "q" user input to quit forming the paragraph.
                if (input == "q")                      // If we find q
                    can_Continue = false;              // Set can_Continue to false
                else
                    result += " " + input;             // Add the string to the result if q isn't found.
            } while (can_Continue);                    // The code runs when can_Continue is set to true.

            return result.Trim();                      // Trim function ensures we trim off whitespace on lines for the result string.
        }
    }
}