Board.cpp

//
// Created by vb-jakub on 19.05.24.
//

#include "Board.h"
#include <algorithm>
#include <iomanip>
#include <iostream>

Board::Board(SnakeModel & snakeRef, int height, int width) : snake(snakeRef){
    this->height=height;
    this->width=width;
    board.resize(width*height,{false,false});
    gamestate=RUNNING;
    isFood=false;
    switch (snake.getGameMode()){
        case EASY: setFood(); break;
        case NORMAL: setNormalMap(); setFood(); break;
        case HARD: setHardMap(); setFood(); break;
        case DEBUG: setDebugMap(); break;
    }
}

void Board::setNormalMap() {
    for(int row=3; row<height-3; ++row) {
        board[row*width+width/2-1].hasWall=true;
        board[row*width+width/2].hasWall=true;
    }
    for(int col=3; col<width-3; ++col) {
        board[(height/2-1)*width+col].hasWall=true;
        board[(height/2)*width+col].hasWall=true;
    }
}

void Board::setHardMap() {
    for(int col=4; col<width-4; ++col) {
        board[3*width+col].hasWall=true;
        board[4*width+col].hasWall=true;
        board[(height-5)*width+col].hasWall=true;
        board[(height-4)*width+col].hasWall=true;
    }
}

void Board::setDebugMap() {
    isFood=true;
    board[width].hasFood=true;
    for(int colNr=0; colNr<width; ++colNr)
        board[2*width+colNr].hasWall=true;
}

void Board::setFood() {
    while(!isFood){
        int randRow=rand() %height;
        int randCol=rand() %width;
        if(!board[randRow*width+randCol].hasWall and snake.getSnakeInfo(randRow,randCol)==' '){
                board[randRow*width+randCol].hasFood=true;
                isFood=true;
            }
    }
}

void Board::update() {
    if(updateGameState()==RUNNING) {
        snake.moveSnake();
        std::pair<int, int> headPosition=snake.getHeadPosition();
        if(isOnBoard(headPosition.first,headPosition.second) and board[headPosition.first*width+headPosition.second].hasFood){
            snake.reduceSnakeTail(true);
            board[headPosition.first*width+headPosition.second].hasFood=false;
            isFood=false;
            setFood();
        }else snake.reduceSnakeTail(false);
        if(!isOnBoard(headPosition.first, headPosition.second) or board[headPosition.first*width+headPosition.second].hasWall)
            gamestate=FINISHED_LOSS;
        if(snake.getSnakeInfo(headPosition.first, headPosition.second)=='x')
            gamestate=FINISHED_LOSS;
    }
}

// RUNNING         - the game isn't yet finished
// FINISHED_WIN    - snake is on all fields on board without fields with walls
// FINISHED_LOSS   - snake hit a wall, snake go outside the board or snake bite itself
GameState Board::updateGameState() const {
    if(gamestate==FINISHED_LOSS) return FINISHED_LOSS;
    auto fieldsAmount=std::count_if(board.begin(),board.end(),[](Field board) {return !board.hasWall;});
    if(fieldsAmount==snake.getSnakeLength()) return FINISHED_WIN;
    return RUNNING;
}

//if the field is outside board        - return '#' character
//if the field has wall                - return 'W' character
//if the field has food                - return 'F' character
//if the field hasn't wall or food     - return '_' character
char Board::getFieldInfo(int row, int col) const {
    if(!isOnBoard(row,col)) return '#';
    if(board[row*width+col].hasWall) return 'W';
    if(board[row*width+col].hasFood) return 'F';
    return '_';
}

//display board as a string of 4 characters in square brackets:
//-first character inform us that the field has wall, if it is, will display 'W'
//-second character inform us that the field has food, if it is, will display 'F'
//-third character inform us that on the field is snake head, if it is, will display 'H'
//-fourth character inform us that on the field is snake tail, if it is, will display 'T'
//display also numbers of cols and rows
void Board::debug_display() const {
    std::cout << " ";
    for(int colNr=0; colNr<width; ++colNr)
        std::cout << "    " << std::setw(2) << colNr;
    std::cout << std::endl;
    for(int rowNr=0; rowNr<height; ++rowNr) {
        std::cout << std::setw(2) << std::right << rowNr <<" ";
        for(int colNr=0; colNr<width; ++colNr) {
            std::cout << "[";
            if(board[rowNr*width+colNr].hasWall) std::cout << 'W';
            else std::cout << ".";
            if(board[rowNr*width+colNr].hasFood) std::cout << 'F';
            else std::cout << ".";
            if(snake.getSnakeInfo(rowNr,colNr)=='H') std::cout << 'H';
            else std::cout << ".";
            if(snake.getSnakeInfo(rowNr,colNr)=='B' or snake.getSnakeInfo(rowNr,colNr)=='T') std::cout << 'T';
            else std::cout << ".";
            std::cout << "]";
        }
        std::cout << std::endl;
    }
}