using System;

using System.Collections.Generic;

using System.Text.RegularExpressions;

​

class Program

{

    static void Main()

    {

        DiagnosticWorkflow workflow = new DiagnosticWorkflow();

        workflow.Start();

    }

}

​

class Appointment

{

    public int Id { get; set; }

    public string PatientName { get; set; }

    public string TestType { get; set; }

    public DateTime Date { get; set; }

    public string Status { get; set; } = "Scheduled";

    public string Finding { get; set; }

    public string ImageFileName { get; set; }

    public string ReportDeliveryMethod { get; set; }

​

    // Blood test parameters

    public float? Hemoglobin { get; set; }

    public float? WBC { get; set; }

    public float? RBC { get; set; }

}

​

class DiagnosticWorkflow

{

    List<Appointment> appointments = new List<Appointment>();

    int counter = 1;

​

    public void Start()

    {

        Console.WriteLine("=== Diagnostic Workflow System ===");

​

        while (true)

        {

            Console.WriteLine("\n1. Schedule Test");

            Console.WriteLine("2. Complete Diagnostic Report");

            Console.WriteLine("3. View All Appointments");

            Console.WriteLine("4. Exit");

            Console.Write("Choose an option: ");

            string choice = Console.ReadLine();

​

            switch (choice)

            {

                case "1":

                    ScheduleTest();

                    break;

                case "2":

                    CompleteAppointment();

                    break;

                case "3":

                    ViewAppointments();

                    break;

                case "4":

                    Console.WriteLine("Exiting...");

                    return;

                default:

                    Console.WriteLine("Invalid option.");

                    break;

            }

        }

    }

​

    void ScheduleTest()

    {

        Console.Write("Enter patient name: ");

        string name = Console.ReadLine();

        while (string.IsNullOrWhiteSpace(name) || !Regex.IsMatch(name, @"^[A-Za-z\s]+$"))

        {

            Console.Write("Invalid name. Use alphabets only: ");

            name = Console.ReadLine();

        }

​

        Console.WriteLine("Select Test Type:\n1. Blood Test\n2. Imaging Test (MRI, CT, etc.)");

        string testChoice = Console.ReadLine();

        string testType = "";

        if (testChoice == "1")

            testType = "Blood Test";

        else if (testChoice == "2")

            testType = "Imaging Test";

        else

        {

            Console.WriteLine("Invalid choice. Test not scheduled.");

            return;

        }

​

        Console.Write("Enter appointment date (yyyy-mm-dd): ");

        string dateInput = Console.ReadLine();

        DateTime date;

        while (!DateTime.TryParse(dateInput, out date) || date.Date < DateTime.Today)

        {

            Console.Write("Invalid or past date. Enter again (yyyy-mm-dd): ");

            dateInput = Console.ReadLine();

        }

​

        Appointment appt = new Appointment

        {

            Id = counter++,

            PatientName = name,

            TestType = testType,

            Date = date

        };

​

        appointments.Add(appt);

        Console.WriteLine($"{testType} scheduled with ID: {appt.Id}");

    }

​

    void CompleteAppointment()

    {

        Console.Write("Enter appointment ID to complete: ");

        int id;

        while (!int.TryParse(Console.ReadLine(), out id))

        {

            Console.Write("Invalid ID. Enter numeric: ");

        }

​

        Appointment appt = appointments.Find(a => a.Id == id);

        if (appt == null)

        {

            Console.WriteLine("Appointment not found.");

            return;

        }

​

        if (appt.Status == "Completed")

        {

            Console.WriteLine("Already completed.");

            return;

        }

​

        Console.Write("Enter findings: ");

        string finding = Console.ReadLine();

        while (string.IsNullOrWhiteSpace(finding))

        {

            Console.Write("Finding cannot be empty: ");

            finding = Console.ReadLine();

        }

        appt.Finding = finding;

​

        if (appt.TestType == "Imaging Test")

        {

            Console.Write("Enter image file name (.jpg/.jpeg/.png): ");

            string file = Console.ReadLine();

            while (string.IsNullOrWhiteSpace(file) || !Regex.IsMatch(file, @"\.(jpg|jpeg|png)$", RegexOptions.IgnoreCase))

            {

                Console.Write("Invalid image file name: ");

                file = Console.ReadLine();

            }

            appt.ImageFileName = file;

        }

        else if (appt.TestType == "Blood Test")

        {

            appt.Hemoglobin = ReadFloat("Enter Hemoglobin value (g/dL): ");

            appt.WBC = ReadFloat("Enter WBC count (10^9/L): ");

            appt.RBC = ReadFloat("Enter RBC count (10^12/L): ");

        }

​

        Console.WriteLine("Select report delivery: 1. Printed Copy  2. Patient Portal");

        string method = Console.ReadLine();

        while (method != "1" && method != "2")

        {

            Console.Write("Invalid choice. Select 1 or 2: ");

            method = Console.ReadLine();

        }

        appt.ReportDeliveryMethod = method == "1" ? "Printed Copy" : "Patient Portal";

​

        appt.Status = "Completed";

​

        // Print report

        Console.WriteLine("\n--- Diagnostic Report ---");

        Console.WriteLine($"ID: {appt.Id}");

        Console.WriteLine($"Patient: {appt.PatientName}");

        Console.WriteLine($"Type: {appt.TestType}");

        Console.WriteLine($"Date: {appt.Date:yyyy-MM-dd}");

        Console.WriteLine($"Finding: {appt.Finding}");

        if (appt.TestType == "Imaging Test")

        {

            Console.WriteLine($"Image File: {appt.ImageFileName}");

        }

        else

        {

            Console.WriteLine($"Hemoglobin: {appt.Hemoglobin} g/dL");

            Console.WriteLine($"WBC: {appt.WBC} x10^9/L");

            Console.WriteLine($"RBC: {appt.RBC} x10^12/L");

        }

        Console.WriteLine($"Delivery: {appt.ReportDeliveryMethod}");

        Console.WriteLine($"Status: {appt.Status}");

    }

​

    float ReadFloat(string prompt)

    {

        float value;

        Console.Write(prompt);

        while (!float.TryParse(Console.ReadLine(), out value))

        {

            Console.Write("Invalid input. Enter numeric value: ");

        }

        return value;

    }

​

    void ViewAppointments()

    {

        Console.WriteLine("\n--- Appointments ---");

        if (appointments.Count == 0)

        {

            Console.WriteLine("No appointments found.");

            return;

        }

​

        foreach (var a in appointments)

        {

            Console.WriteLine($"ID: {a.Id}, Patient: {a.PatientName}, Date: {a.Date:yyyy-MM-dd}, Type: {a.TestType}, Status: {a.Status}");

        }

    }

}