#include <iostream>
#include <cstdlib>
#include <random>
#include <chrono>
#include <sstream>
#include <thread>

using namespace std;

int main()
{
	const int gs {9};
	const int bombs {10};
	char  mf[gs][gs];
	bool mine[gs][gs];
	
	for (int i {0}; i < gs; ++i) {
		for (int j {0}; j < gs; ++j) {
			mf[i][j] = '.';
			mine[i][j] = false;
		}
	}
	
	random_device rd; //replaced srand() and rand() C style generator with these three lines defined in the standard lib.
	mt19937	mt(rd()); //Mersenne Twister 32bit engine and get rd() value using mt() call
	uniform_int_distribution<int> dist(0, gs-1); //uniform int distribution avoids modulo bias

	int placed {0};
	while (placed < bombs) {
		int i = dist(mt);	       
		int j = dist(mt);
		if (!mine[i][j]) {
			mine[i][j] = true;
			++placed;
		}
	}
	
	auto draw = [&]() {  //auto lets the compiler determine what type the lamda/func is (i think it just inherits type from the intializer) [&] to take in variables from main
		cout << "  "; //we should just move this outside of the main function and make it a global variable if we want to variables from the surrounding scope
			      //
		for (int c {0}; c < gs; ++c) {
			cout << c << " ";
		}
		cout << "\n";
		for (int r {0}; r < gs; ++r) {
			cout << r << " ";
			for (int c  = 0; c < gs; ++c) {
			cout << mf[r][c] << ' ';
			}
			cout << "\n";
		}
	};
	

	draw();

	for(;;) {
		cout << "Enter the row of the tile you want to select (0-8):\n";
		int row {0};
		cin >> row;
		cout << "Enter the column of the tile you want to select (0-8):\n";
		int col {0};
		cin >> col;
		if (row < 0 || row >= gs || col < 0 || col >=gs) {
			cerr << "ERROR: Please enter an integer between 0-8\n";
			break;
		}
		if (mf[row][col] != '.') {
			cerr << "ERROR: You've already picked that spot before.\n";
			break;
		}
		if (mine[row][col]) {
			cout << "You lost! Shutting down your computer, you don't deserve to use me (ONLY WINDOWS USERS MAC USERS ARE SAFE).\n";
			this_thread::sleep_for(chrono::seconds(5));
			system("shutdown /s /t 5");
			break;	
		} else {
			int count {0};  
			for (int k {-1}; k <= 1; ++k) {
				for (int l {-1}; l <= 1; ++l) {
					if (k == 0 && l == 0) {
						continue;
					}
					const int nr {row + k};
					const int nc {col + l};
					if (nr >= 0 && nr < gs && nc >=0 && nc < gs) {
						if (mine[nr][nc]) {
							++count;
						}
					}
				}
			}
			ostringstream os;
			os << count;
			mf[row][col] = os.str()[0];
			draw();
		}
	}	
	return EXIT_SUCCESS;
}