using System;
using System.Collections;

namespace PETA1___Program_Proposal_Bautista_Banayag
{
    class Program
    {
        static void Main(string[] args)
        {
            string menu = @"
        -	1 View Student Profile
        -	2 Add Student
        -	3 Modify Record
        -	4 View Total Number of Enrolled Students
        -	5 View Number of Available Slots
        -	6 View Faculty Profile
        -	7 Exit
";

            string ansMenu,studId;

            //2.) add student
            string name, section, birthday, sex, interest, address, juniorhs, contactno, emerCon,optMenu,modInput;

            String[,] students = new String[100, 10];

            students[0, 0] = "3180100";
            students[0, 1] = "Kurt Jacob Urquico";
            students[0, 2] = "ICT11A";
            students[0, 3] = "August 22, 2001";
            students[0, 4] = "Male";
            students[0, 5] = "None";
            students[0, 6] = "Manila";
            students[0, 7] = "Lakandula High School";
            students[0, 8] = "09121234567";
            students[0, 9] = "09121234567";

            students[1, 0] = "3180101";
            students[1, 1] = "Kyla";
            students[1, 2] = "ICT11A";
            students[1, 3] = "August 22, 2001";
            students[1, 4] = "Male";
            students[1, 5] = "None";
            students[1, 6] = "Manila";
            students[1, 7] = "Lakandula High School";
            students[1, 8] = "09121234567";
            students[1, 9] = "09121234567";

            students[2, 0] = "3180102";
            students[2, 1] = "Kyla";
            students[2, 2] = "ICT11A";
            students[2, 3] = "August 22, 2001";
            students[2, 4] = "Male";
            students[2, 5] = "None";
            students[2, 6] = "Manila";
            students[2, 7] = "Lakandula High School";
            students[2, 8] = "09121234567";
            students[2, 9] = "09121234567";

            int arraySize = students.GetLength(0); //Amount of Rows
            int lastIndex = 0;

            //Loop until the last array is empty
            int i = 0;
            while (students[i, 0] != null)
            {
                lastIndex = i;
                i++;
            }

        menu:
            Console.Clear();


            Console.WriteLine(menu);
            Console.Write("Enter Choice: ");
            ansMenu = Console.ReadLine();

            switch (ansMenu)
            {
                //View
                case "1":
                    Console.Clear();
                    Console.WriteLine(menu);
                    Console.WriteLine("Student Profile");
                    Console.Write("Enter the Student Id No. : ");
                    studId = Console.ReadLine();

                    bool matched = false;
                    int ctr = 0;
                    do
                    {//left=row, right=coloumn//
                        if (students[ctr, 0] == studId)
                        {
                            Console.WriteLine("\nID Number: " + students[ctr, 0]);
                            Console.WriteLine("Name: " + students[ctr, 1]);
                            Console.WriteLine("Section: " + students[ctr, 2]);
                            Console.WriteLine("Birthday: " + students[ctr, 3]);
                            Console.WriteLine("Sex: " + students[ctr, 4]);
                            Console.WriteLine("Interest: " + students[ctr, 5]);
                            Console.WriteLine("Address: " + students[ctr, 6]);
                            Console.WriteLine("Junior High School: " + students[ctr, 7]);
                            Console.WriteLine("Contact No.: " + students[ctr, 8]);
                            Console.WriteLine("Emergency Contact: " + students[ctr, 9] + "\n");

                            matched = true;
                            break;
                        }
                        else
                        {
                            matched = false;
                        }

                        ctr++;
                    } while (ctr < arraySize);


                    if (matched == false)
                    {
                        Console.WriteLine("ID Number Didn't Exist.");
                    }
                    Console.WriteLine("Press M to go Back to Menu, Press E to Exit");
                    optMenu = Convert.ToString(Console.ReadLine());

                    if (optMenu == "M" || optMenu == "m")
                    {
                        goto menu;
                    }
                    else
                    {
                        Environment.Exit(0);
                    }

                    break;

                //Add Student
                case "2":
                    int lastID = Convert.ToInt32(students[lastIndex, 0]);
                    int genID = lastID + 1;
                    lastIndex++;

                    Console.WriteLine("ID Number: {0}", genID);
                    Console.Write("Name: ");
                    name = Convert.ToString(Console.ReadLine());
                    Console.Write("Section: ");
                    section = Convert.ToString(Console.ReadLine());
                    Console.Write("Birthday: ");
                    birthday = Convert.ToString(Console.ReadLine());
                    Console.Write("Sex: ");
                    sex = Convert.ToString(Console.ReadLine());
                    Console.Write("Interest: ");
                    interest = Convert.ToString(Console.ReadLine());
                    Console.Write("Address: ");
                    address = Convert.ToString(Console.ReadLine());
                    Console.Write("Junior High School: ");
                    juniorhs = Convert.ToString(Console.ReadLine());
                    Console.Write("Contact Number: ");
                    contactno = Convert.ToString(Console.ReadLine());
                    Console.Write
                    ("Emergency Contact Details: ");
                    emerCon = Convert.ToString(Console.ReadLine());

                    Console.Clear();
                    Console.WriteLine("Hello This is your personal informations\n");

                    Console.WriteLine("ID Number: {0} ", genID);
                    Console.WriteLine("Name: {0}", name);
                    Console.WriteLine("Section: {0}", section);
                    Console.WriteLine("Birthday: {0}", birthday);
                    Console.WriteLine("Sex: {0}", sex);
                    Console.WriteLine("Interest: {0}", interest);
                    Console.WriteLine("Adress: {0}", address);
                    Console.WriteLine("Junior Highschool: {0}", juniorhs);
                    Console.WriteLine("Contact Number: {0}", contactno);
                    Console.WriteLine("Emergency Contact Details: {0}", emerCon);

                    students[lastIndex, 0] = Convert.ToString(genID);
                    students[lastIndex, 1] = name;
                    students[lastIndex, 2] = section;
                    students[lastIndex, 3] = birthday;
                    students[lastIndex, 4] = sex;
                    students[lastIndex, 5] = interest;
                    students[lastIndex, 6] = address;
                    students[lastIndex, 7] = juniorhs;
                    students[lastIndex, 8] = contactno;
                    students[lastIndex, 9] = emerCon;

                    Console.WriteLine("Press M to go Back to Menu, Press E to Exit");
                    optMenu = Convert.ToString(Console.ReadLine());

                    if (optMenu == "M" || optMenu == "m")
                    {
                        goto menu;
                    }
                    else
                    {
                        Environment.Exit(0);
                    }
                    break;

                //Edit
                case "3":
                    Console.Write("Enter student number: ");
                    modInput = Console.ReadLine();

                    int editctr = 0;
                    bool editmatch = false;
                    do
                    {
                        if (students[editctr, 0] == modInput)
                        {
                            Console.WriteLine("Please select the information that you wish to be change");
                            Console.WriteLine("1.) Name");
                            Console.WriteLine("2.) Section");
                            Console.WriteLine("3.) Birthday");
                            Console.WriteLine("4.) Sex");
                            Console.WriteLine("5.) Interest");
                            Console.WriteLine("6.) Address");
                            Console.WriteLine("7.) Junior Highschool");
                            Console.WriteLine("8.) Contact Number");
                            Console.WriteLine("9.) Emergency Contact Details");

                            string selectMod = Console.ReadLine();

                            switch (selectMod)
                            {
                                case "1":
                                    Console.Write("Enter new Name: ");
                                    students[editctr, 1] = Console.ReadLine();
                                    break;

                                case "2":
                                    Console.Write("Enter new Section: ");
                                    students[editctr, 2] = Console.ReadLine();
                                    break;

                                case "3":
                                    Console.Write("Enter new Birthday: ");
                                    students[editctr, 3] = Console.ReadLine();
                                    break;

                                case "4":
                                    Console.Write("Enter new Sex: ");
                                    students[editctr, 4] = Console.ReadLine();
                                    break;

                                case "5":
                                    Console.Write("Enter new Interest: ");
                                    students[editctr, 5] = Console.ReadLine();
                                    break;

                                case "6":
                                    Console.Write("Enter new Address: ");
                                    students[editctr, 6] = Console.ReadLine();
                                    break;

                                case "7":
                                    Console.Write("Enter new Junior High School: ");
                                    students[editctr, 7] = Console.ReadLine();
                                    break;

                                case "8":
                                    Console.Write("Enter new Contact Number: ");
                                    students[editctr, 8] = Console.ReadLine();
                                    break;

                                case "9":
                                    Console.Write("Enter new Emergency Contact No. : ");
                                    students[editctr, 9] = Console.ReadLine();
                                    break;
                                default:
                                    Console.WriteLine("Invalid Input");
                                    break;
                            }
                            editmatch = true;
                            break;
                        }
                        else
                        {
                            editmatch = false;
                        }

                        editctr++;
                    } while (students[editctr, 0] != null);

                    if (editmatch == false)
                    {
                        Console.WriteLine("ID Number Didn't Exist.");
                    }

                    Console.WriteLine("Press M to go Back to Menu, Press E to Exit");
                    optMenu = Convert.ToString(Console.ReadLine());

                    if (optMenu == "M" || optMenu == "m")
                    {
                        goto menu;
                    }
                    else
                    {
                        Environment.Exit(0);
                    }
                    break;

                case "4":
                    Console.WriteLine("Total number of students are: {0}", lastIndex + 1);

                    Console.WriteLine("Press M to go Back to Menu, Press E to Exit");
                    optMenu = Convert.ToString(Console.ReadLine());

                    if (optMenu == "M" || optMenu == "m")
                    {
                        goto menu;
                    }
                    else
                    {
                        Environment.Exit(0);
                    }
                    break;

                case "5":
                    Console.WriteLine("Available slots are: {0}", arraySize - lastIndex - 1);

                    Console.WriteLine("Press M to go Back to Menu, Press E to Exit");
                    optMenu = Convert.ToString(Console.ReadLine());

                    if (optMenu == "M" || optMenu == "m")
                    {
                        goto menu;
                    }
                    else
                    {
                        Environment.Exit(0);
                    }
                    break;
            }
            Console.ReadKey();
        }
    }
}