#include <iostream>

using namespace std;

char selection,marathon_type;
const int full_marathon =10000, half_marathon =5000, seats =20, row =5, column =4;
int seat_to_book, seat_to_vacate, gross_profit, seat_to_change;

void main_menu()
{
        //display menu
    cout << "========================"<< endl;
    cout << "    THEATRE BOOKING     "<< endl;
    cout << "========================"<< endl;
    cout << "1. View available seats"<< endl;
    cout << "2. Book seat"<< endl;
    cout << "3. Vacate seat"<< endl;
    cout << "4. Change marathon type"<< endl;
    cout << "5. Calculate gross profit"<< endl;
    cout << "6. Quit program"<< endl;
}

void print_seats()
{
    int seats [5][4] = {{1,2,3,4},{5,6,7,8},{9,10,11,12},{13,14,15,16},{17,18,19,20}};

        for (int row = 0; row < 5; row++)
        {
           for (int column=0; column<4; column++)
            {
            cout << seats[row][column] << " ";
            }
            cout << endl;
        }
}

void marathon_selection()
{
    //selects the marathon type
    cout << "F - Full Marathon" << endl;
    cout << "H - Half Marathon" << endl;
    cin >> marathon_type;

    switch(toupper(marathon_type))
    {
        case 'F':
        gross_profit += full_marathon;
        cout << "=========================" << endl;
        cout << "Seat Booking Confirmation" << endl;
        cout << "=========================" << endl;
        cout << "Seat No: " << seat_to_book << endl;
        cout << "Marathon Type: Full Marathon" << endl;
        cout << "Cost: Ksh " << full_marathon << endl;
        break;

        case 'H':
        gross_profit += half_marathon;
        cout << "=========================" << endl;
        cout << "Seat Booking Confirmation" << endl;
        cout << "=========================" << endl;
        cout << "Seat No: " << seat_to_book << endl;
        cout << "Marathon Type: Half Marathon" << endl;
        cout << "Cost: Ksh " << half_marathon << endl;
        break;

    }
    main_menu();
    return;
}

 void vacate_seats()
 {
     int seat_to_vacate;
     int array[20];
     cout << "Vacate seat number: ";
     cin >> seat_to_vacate;
     seat_to_vacate--;
     for (int i = seat_to_vacate; i < seats; i++)
     {
         int temp = array[i];
         array[i] = array[i+1];
         array[i+1] = temp;
     }
     for (int i = 0; i < seats - 1; i ++)
    {
         cout << array[i]<< " ";
     }
 }

void book_seats()
{
    //booking seats
    do
    {
        cout << "Enter the seat number to book: ";
        cin >> seat_to_book;
        while (seat_to_book >0 && seat_to_book <= 20)
        {
            cout << "Select the type of marathon you want: " << endl;
            marathon_selection();
            return;
        }
    }
    while (true);
}

void change_marathon_type()
{
    char marathon_to_change;
    cout << "Enter the seat number you want to change the Marathon Type: ";
    cin >> seat_to_change;
    cout << "1. Full Marathon to Half Marathon" << endl;
    cout << "2. Half Marathon to Full Marathon" << endl;
    cin >> marathon_type;

    if (marathon_type == '1')
    {
        gross_profit-=half_marathon;
        cout << "Successfully changed from Full Marathon to Half Marathon" << endl;
        cout << "Price: " << half_marathon << endl;
    }
    else
    {
        gross_profit+=half_marathon;
        cout << "Successfully changed from Half Marathon to Full Marathon:" << endl;
        cout << "Price: " << endl;
    }

}

int DisplayGrossProfit()
{
    if (gross_profit != 0)
    {
        cout << "The Gross Profit is Ksh: " << gross_profit << endl;
    }
    else
    { cout << "You have not sold out any tickets. The Gross profit is Ksh: 0 " << endl;

    }
}

int main ()
{

  do
    {
        main_menu();
        cin >> selection;

      switch (selection)
      {
          case '1':
          print_seats();
          break;

          case '2':
          book_seats();
          break;

          case '3':
          vacate_seats();
          break;

          case '4':
          change_marathon_type();
          break;

          case '5':
          DisplayGrossProfit();
          break;

          case '6':
          return 0;

          default:
          cout << "Please choose a valid Option!" << endl;
      }
    }
  while (true);
  cout << "Exitting. Thank You for using the Program" << endl;

  return 0;
}