/*
 * Simulation water
 * main()
 * |
 * |--Room
 * |    |
 * |    |--setRoom()
 * |
 * |--Water
 * |    |
 * |    |--setWater()
 * |    |
 * |    |--getWater()
 * |    |
 * |    |--physix()--getWater()
 * |
 * |--Display
 * |    |
 * |    |--menu()
 * |    |
 * |    |--menu_3()--error()
 * |    |
 * |    |--menu_4()--error()
 * |    |
 * |    |--error()
 * |    |
 * |    |--debug()
 * |
 *
**/

#include <iostream>
#include <vector>
#include <stdlib.h>
#include <windows.h>
#include <conio.h>

using namespace std;
vector< vector<int> > water;    //используется в: Water.
int room_size = 10;             //используется в: Water, Room;
bool debug_water = false;
bool debug_room = false;

class Room {
private:

public:
    void setRoom() {
        star: ;
        system("cls");
        cout << "\n   set room size         >> ";   cin >> room_size;
        cout << endl;
        if (room_size > 20) {
            cout << "ERROR, parameter is very big. Please, set 1-20 room size \n";
            goto star;
        }
        else if (room_size <= 0) {
            cout << "ERROR, parameter < 0. Please, set 1-20 room size \n";
            goto star;
        }
        debug_room = true;
    }

};

class Water {
private:
    vector<int> water_x;
    int water_level = 0;
public:
    void setWater() {
        system("cls");
        star: ;

        cout << "\n   default water level in room   >> ";   cin >> water_level;
        cout << endl;
        if (water_level > 7) {
            cout << "\n   ERROR, parameter is very big. Please, set 0-7 water level \n";
            goto star;
        }
        else if (water_level < 0) {
            cout << "\n   ERROR, parameter < 0. Please, set 0-7 water level \n";
            goto star;
        }
        water_x.clear();
        water.clear();
        for (;water.size() < room_size; water.push_back(water_x))
            for (;water_x.size() < room_size; water_x.push_back(water_level)) ;

        debug_water = true;
    }

    void getWater() {
        star: ;
        system("cls");

        cout << "  ";
        for (int x = 0; x < room_size+1; x++) {
            cout << "##";
        }
        cout << "#";
        for (int x = 0; x < room_size; x++) {
            cout << "\n  # ";
            for (int y = 0; y < room_size; y++) {
                cout << water[x][y] << " ";
            }
            cout << "#";
        }
        cout << "\n  ";
        for (int x = 0; x < room_size+1; x++) {
            cout << "##";
        }
        cout << "#\n";

    }

    void physix() {
        const int qX1[8] = {1, -1, 1, 0, -1, 1, 0, -1};
        const int qY1[8] = {0, 0, 1, -1, 1, -1, 1, -1};
        int qX;
        int qY;
        vector<int> free_block;
        int block;
        bool physix_debug; //debug
        for (int x = 0; x < room_size; x++) {
            for (int y = 0; y < room_size; y++) {
                free_block.clear();
                physix_debug = false; //debug
                for (int k = 0; k < 9; k++) {
                    qX = qX1[k] + x;
                    qY = qY1[k] + y;
                    if (water[x][y] != 1)
                        if (qX >= 0 && qY >= 0)
                            if (qX < room_size && qY < room_size)
                                if (water[qX][qY] < water[x][y] && water[x][y] != 0) {
                                    free_block.push_back(k);
                                    physix_debug = true; //debug
                                }
                }

                if (physix_debug == true) {
                    block = rand() % free_block.size();
                    qX = x+qX1[free_block[block]];
                    qY = y+qY1[free_block[block]];

                    water[x][y] -= 1;
                    water[qX][qY]   += 1;
                }
            }
        Water::getWater();
        Sleep(10);
        }
    }
};

class Display {
private:
public:
    void menu() {
        system("cls");
        cout << "\n  ####################################\n"
             << "  ###################################\n"
             << "  ##                              ##\n"
             << "  ##       1 - new room           ##\n"
             << "  ##       2 - start              ##\n"
             << "  ##       3 - add block          ##\n"
             << "  ##       4 - del block          ##\n"
             << "  ##       5 - info               ##\n"
             << "  ##       0 - quit               ##\n"
             << "  ##                              ##\n"
             << " ##################################\n"
             << "##################################\n";
        cout << "\n\n\n\n"
             << "Command    >> ";
    }

    void menu_3() {
        int x = 0;
        int y = 0;
        //int type;
        star: ;
        system("cls");
        cout << "\n  ####################################\n"
             << "  ###################################\n"
             << "  ##                              ##\n"
             << "  ##        ADD  BLOCK            ##\n"
             << "  ##                              ##\n"
             << " ##################################\n"
             << "##################################\n";
        cout << "## room size = " << room_size << "x" << room_size << endl << endl;
        cout << "set coordinates X >> ";        cin >> x;
        if (x > room_size || x < 1) {
            error("ucorrect size");
            getch();
            goto star;
        }
        cout << "\n"
             << "set coordinates Y >> ";        cin >> y;
        if (y > room_size || y < 1) {
            error("ucorrect size");
            getch();
            goto star;
        }
        x -= 1;
        y -= 1;
        water[x][y] = 7;
    }

    void menu_4() {
        int x = 0;
        int y = 0;
        //int type;
        star: ;
        system("cls");
        cout << "\n  ####################################\n"
             << "  ###################################\n"
             << "  ##                              ##\n"
             << "  ##        DELETE BLOCK          ##\n"
             << "  ##                              ##\n"
             << " ##################################\n"
             << "##################################\n";
        cout << "## room size = " << room_size << "x" << room_size << endl << endl;
        cout << "set coordinates X >> ";        cin >> x;
        if (x > room_size || x < 1) {
            error("ucorrect size");
            getch();
            goto star;
        }
        cout << "\n"
             << "set coordinates Y >> ";        cin >> y;
        if (y > room_size || y < 1) {
            error("ucorrect size");
            getch();
            goto star;
        }
        x -= 1;
        y -= 1;
        water[x][y] = 0;
    }

    void error(string s) {
        system("cls");
        cout << "\n  ####################################\n"
             << "  ###################################\n"
             << "  ##                              ##\n"
             << "  ##       ERROR ERROR            ##\n"
             << "  ##                              ##\n"
             << " ##################################\n"
             << "##################################\n";
        cout << "# " << s << " #\n";
    }

    bool debug() {
        if (debug_water == false || debug_room == false) {
            error("ERROR! please, set parameters. Menu > 1 - new room.");
            return false;
        }
        return true;
    }
};

int main() {
    Water objWater;
    Room objRoom;
    Display objDisplay;

    int command;

    star: ;
    objDisplay.menu();
    cin >> command;
    switch (command) {
        case 1:
            objRoom.setRoom();
            objWater.setWater();
            objWater.getWater();
            cout << "   Please, press button \n";
            getch();
            goto star;
        case 2:
            if (objDisplay.debug() == false) { getch(); goto star; }
            for (int x = 0; x < 10; x++)
                objWater.physix();
            objWater.getWater();
            cout << "   Please, press button \n";
            getch();
            goto star;
        case 3:
            if (objDisplay.debug() == false) { getch(); goto star; }
            objDisplay.menu_3();
            objWater.getWater();
            cout << "   Please, press button \n";
            getch();
            goto star;
        case 4:
            if (objDisplay.debug() == false) { getch(); goto star; }
            objDisplay.menu_4();
            objWater.getWater();
            cout << "   Please, press button \n";
            getch();
            goto star;
        case 5:
            if (objDisplay.debug() == false) { getch(); goto star; }
            objWater.getWater();
            cout << "   Please, press button \n";
            getch();
            goto star;
        case 0:
            break;
        default:
            objDisplay.error("ucorrect command");
            getch();
            goto star;
    }
}