#include <iostream>
#include <cstdlib>
#include <cstring>
#include <vector>
#include <ctime>
#include <conio.h>
#include <Windows.h>
using namespace std;


//*************************DATA****************
class coord
{public:
      int x,y;
};

void game_over();
void start();
void game();
int lung = 0;
int difficulty;
char space[20][70];
coord element[100], gandac, dir;


// ********************** FUNCTIONS**************


void wait ( int ms )
{
  clock_t endwait;
  endwait = clock () + ms * CLOCKS_PER_SEC /1000;
  while (clock() < endwait) {}
}

void set_screen()
{
     int i,j;
     for(i=0;i<20;i++)
        for(j=0;j<70;j++)
            space[i][j] = 0;
}
void set_new_bug()
{
     srand( (unsigned)time( NULL ) );
     do {
     gandac.x = rand() % 70;
     gandac.y = rand() % 20;
     } while (space[gandac.y][gandac.x] != 0);
     space[gandac.y][gandac.x] = '&';
}
void mananca()
{
    if((element[lung].x + dir.x)>=70 || (element[lung].x + dir.x) < 0 || (element[lung].y + dir.y) >=20 || (element[lung].y + dir.y) < 0 )
            game_over();
    if ( space[ element[lung].y + dir.y][ element[lung].x + dir.x] == 0 );
     else if ( space[element[lung].y + dir.y][element[lung].x + dir.x] == '&')
     {
          lung += 1;
          element[lung].x = gandac.x;
          element[lung].y = gandac.y;
          set_new_bug();
     }
     else game_over();
}

void misca()
{
     set_screen();
     int i;
     for(i=0;i<lung;i++)
     {
          element[i].x = element[i+1].x;
          element[i].y = element[i+1].y;

          }
     element[lung].x += dir.x;
     element[lung].y += dir.y;
     for(i=0;i<=lung;i++)
          space[element[i].y][element[i].x] = '*';
     space[gandac.y][gandac.x] = '&';
}



void display()
{
    system("cls");
    int i,j;
    cout << "           SCORE : " << lung << endl;
    cout << "|";
    for(j=0;j<70;j++)
        cout << "-";
    cout << "|" << endl;

    for(i=0;i<20;i++)
    {
        cout << "|";
        for(j=0;j<70;j++)
            cout << space[i][j];
        cout << "|" << endl;
    }

    cout << "|";
    for(j=0;j<70;j++)
    cout << "-";
    cout << "|";
}

void game_over()
{
     system("cls");
     cout <<"         GAME OVER!       " << endl << " Ati vrea sa reincercati?(Y/N)";
     char c;
     cin >> c;
     if (c == 'y' || c == 'Y')
     {
            start();
            system("cls");
     }
     else
     exit(1);

}


void start()
{
     cout << "Va rugam stati o dificultate intre 1 si 10:" << endl;
    cin >> difficulty;
    if(difficulty > 10 || difficulty < 1)
           {
            MessageBox(NULL, "Dificultatea introdusa este incorecta", "Eroare", 0);
            system("cls");
            start();
           }
    else game();

}

void game()
{
     char c;
    dir.x = 1;
    dir.y = 0;
    lung = 0;
    element[0].x = 35;
    element[0].y = 10;
    space[10][35] = '*';
     srand( (unsigned)time( NULL ) );
     gandac.x = rand() % 70;
     gandac.y = rand() % 20;
     space[gandac.y][gandac.x] = '&';
     while(lung < 100)
     {
           display();
           misca();
           mananca();
           wait (100 * (11 - difficulty));
           if(_kbhit())
           {
               c = getch();
               if( c == 80)
               {
                   dir.x = 0;
                   dir.y = 1;
               }
               else if( c == 75)
               {
                   dir.x = -1;
                   dir.y = 0;
               }
               else if( c == 77)
               {
                   dir.x = 1;
                   dir.y = 0;
               }
               else if( c == 72)
               {
                   dir.x = 0;
                   dir.y = -1;
               }
               else if ( c == 13 )
                    exit(1);
           }
     }

}

//**************************MAIN***************************************
int main()
{

    cout << "Bine ati venit la jocul de rama!" << endl ;
    start();


    cout << endl;
    system("pause");
    return 0;
}