SnakeBotDifficulties.txt

//ZIGZAG

bool SnakeClient::_bot()
{
    Directions dir = _direction;
    if (_FIELD_HEIGHT % 2 &&
        (_homeDots[0].x() == _FIELD_WIDTH - 1 &&
        (_homeDots[0].y() == _FIELD_HEIGHT - 1 ||
        _homeDots[0].y() == 0)))
        _isDown = !_isDown;
    if (!(_FIELD_HEIGHT % 2) &&
       (_homeDots[0].x() == 0 &&
       (_homeDots[0].y() == _FIELD_HEIGHT - 1 ||
       _homeDots[0].y() == 0)))
        _isDown = !_isDown;
    if ((dir == down || dir == up) && _homeDots[0].x() == 0)
        dir = right;
    else if ((dir == down || dir == up) && _homeDots[0].x() == _FIELD_WIDTH - 1)
        dir = left;
    else if (dir == right &&
             (_homeDots[0].x() == 0 || _homeDots[0].x() == _FIELD_WIDTH - 1))
    {
        if (_homeDots[0].y() == _FIELD_HEIGHT - 1)
            dir = up;
        else if (_homeDots[0].y() == 0)
            dir = down;
        else if (_homeDots[0].y() % 2)
            dir = _isDown ? up : down;
        else
            dir = _isDown ? down : up;
    }
    else if (dir == left &&
             (_homeDots[0].x() == 0 || _homeDots[0].x() == _FIELD_WIDTH - 1))
    {
        if (_homeDots[0].y() == _FIELD_HEIGHT - 1)
            dir = up;
        else if (_homeDots[0].y() == 0)
            dir = down;
        else if (_homeDots[0].y() % 2)
            dir = _isDown ? down : up;
        else
            dir = _isDown ? up : down;
    }
    if (dir != _direction)
    {
        _direction = dir;
        return true;
    }
    else
        return false;
}

//SNAIL

bool SnakeClient::_bot()
{
    Directions dir = _direction;
    if (dir == right && _homeDots[0].x() == _FIELD_WIDTH - 1 - _homeDots[0].y())
        dir = down;
    if (dir == down && _homeDots[0].x() == _homeDots[0].y())
        dir = left;
    if (dir == left && _homeDots[0].y() == _FIELD_HEIGHT - 1 - _homeDots[0].x())
        dir = up;
    if (dir == up && _homeDots[0].x() ==  _homeDots[0].y() - 1)
        dir = right;
    if (dir != _direction)
    {
        _direction = dir;
        return true;
    }
    else
        return false;
}


//ALMOST CLEVER SNAKE
bool SnakeClient::_checkMove(Directions tmp)
{
    if (tmp == up && _homeDots[0].y() == 0)
        return false;
    if (tmp == down && _homeDots[0].y() == _FIELD_HEIGHT - 1)
        return false;
    if (tmp == left && _homeDots[0].x() == 0)
        return false;
    if (tmp == right && _homeDots[0].x() == _FIELD_WIDTH - 1)
        return false;
    if (tmp == right)
    {
        QPoint p(_homeDots[0].x() + 1, _homeDots[0].y());
        for (size_t i = 1; i < _homeDots.size(); i++)
            if (p == _homeDots[i])
                return false;
        for (auto snake : _enemiesDots)
            for (size_t i = 0; i < snake.size(); i++)
                if (p == snake[i])
                    return false;
    }
    if (tmp == left)
    {
        QPoint p(_homeDots[0].x() - 1, _homeDots[0].y());
        for (size_t i = 1; i < _homeDots.size(); i++)
            if (p == _homeDots[i])
                return false;
        for (auto snake : _enemiesDots)
            for (size_t i = 0; i < snake.size(); i++)
                if (p == snake[i])
                    return false;
    }
    if (tmp == up)
    {
        QPoint p(_homeDots[0].x(), _homeDots[0].y() - 1);
        for (size_t i = 1; i < _homeDots.size(); i++)
            if (p == _homeDots[i])
                return false;
        for (auto snake : _enemiesDots)
            for (size_t i = 0; i < snake.size(); i++)
                if (p == snake[i])
                    return false;
    }
    if (tmp == down)
    {
        QPoint p(_homeDots[0].x(), _homeDots[0].y() + 1);
        for (size_t i = 1; i < _homeDots.size(); i++)
            if (p == _homeDots[i])
                return false;
        for (auto snake : _enemiesDots)
            for (size_t i = 0; i < snake.size(); i++)
                if (p == snake[i])
                    return false;
    }
    return true;
}

bool SnakeClient::_bot()
{
    Directions dir;
    size_t length = abs(_homeDots[0].x() - _fruits[0].x()) + abs(_homeDots[0].y() - _fruits[0].y());
    QPoint goal = _fruits[0];
    for (size_t i = 1; i < _fruits.size(); i++)
    {
        if (length > abs(_homeDots[0].x() - _fruits[i].x()) + abs(_homeDots[0].y() - _fruits[i].y()))
        {
            goal = _fruits[i];
            length = abs(_homeDots[0].x() - _fruits[i].x()) + abs(_homeDots[0].y() - _fruits[i].y());
        }
    }
    if (_homeDots[0].x() == goal.x())
    {
        dir = (_homeDots[0].y() > goal.y() ? up : down);
        if (!_checkMove(dir))
        {
            if (_checkMove(left))
                dir = left;
            else if (_checkMove(dir == down ? up : down))
                dir = (dir == down ? up : down);
            else if (_checkMove(right))
                dir = right;
        }
    }
    else if (_homeDots[0].y() == goal.y())
    {
        dir = (_homeDots[0].x() > goal.x() ? left : right);
        if (!_checkMove(dir))
        {
            if (_checkMove(up))
                dir = up;
            else if (_checkMove(dir == left ? right : left))
                dir = (dir == left ? right : left);
            else if (_checkMove(down))
                dir = down;
        }
    }
    else
    {
        dir = (_homeDots[0].x() > goal.x() ? left : right);
        if (!_checkMove(dir))
        {
            Directions tmp = _homeDots[0].y() > goal.y() ? up : down;
            if (_checkMove(tmp))
                dir = tmp;
            else if (_checkMove(tmp == up ? down : up))
                dir = (tmp == up ? down : up);
            else if (_checkMove(dir == left ? right : left))
                dir = (dir == left ? right : left);
        }
    }
    if (!_checkMove(dir))
        return false;
    else if (dir != _direction)
    {
        _direction = dir;
        return true;
    }
    else
        return false;
}


// VERY CLEVER SNAKE
bool SnakeClient::_checkMove(Directions tmp)
{
    if (tmp == up && _homeDots[0].y() == 0)
        return false;
    if (tmp == down && _homeDots[0].y() == _FIELD_HEIGHT - 1)
        return false;
    if (tmp == left && _homeDots[0].x() == 0)
        return false;
    if (tmp == right && _homeDots[0].x() == _FIELD_WIDTH - 1)
        return false;
    if (tmp == right)
    {
        QPoint p(_homeDots[0].x() + 1, _homeDots[0].y());
        for (size_t i = 1; i < _homeDots.size(); i++)
            if (p == _homeDots[i])
                return false;
    }
    if (tmp == left)
    {
        QPoint p(_homeDots[0].x() - 1, _homeDots[0].y());
        for (size_t i = 1; i < _homeDots.size(); i++)
            if (p == _homeDots[i])
                return false;
    }
    if (tmp == up)
    {
        QPoint p(_homeDots[0].x(), _homeDots[0].y() - 1);
        for (size_t i = 1; i < _homeDots.size(); i++)
            if (p == _homeDots[i])
                return false;
    }
    if (tmp == down)
    {
        QPoint p(_homeDots[0].x(), _homeDots[0].y() + 1);
        for (size_t i = 1; i < _homeDots.size(); i++)
            if (p == _homeDots[i])
                return false;
    }
    return true;
}

bool SnakeClient::_bot()
{
    Directions dir;
    size_t length = abs(_homeDots[0].x() - _fruits[0].x()) + abs(_homeDots[0].y() - _fruits[0].y());
    QPoint goal = _fruits[0];
    for (size_t i = 1; i < _fruits.size(); i++)
    {
        if (length > abs(_homeDots[0].x() - _fruits[i].x()) + abs(_homeDots[0].y() - _fruits[i].y()))
        {
            goal = _fruits[i];
            length = abs(_homeDots[0].x() - _fruits[i].x()) + abs(_homeDots[0].y() - _fruits[i].y());
        }
    }
    if (_homeDots[0].x() == goal.x())
    {
        dir = (_homeDots[0].y() > goal.y() ? up : down);
        if (!_checkMove(dir))
        {
            if (_checkMove(left))
                dir = left;
            else if (_checkMove(dir == down ? up : down))
                dir = (dir == down ? up : down);
            else if (_checkMove(right))
                dir = right;
        }
    }
    else if (_homeDots[0].y() == goal.y())
    {
        dir = (_homeDots[0].x() > goal.x() ? left : right);
        if (!_checkMove(dir))
        {
            if (_checkMove(up))
                dir = up;
            else if (_checkMove(dir == left ? right : left))
                dir = (dir == left ? right : left);
            else if (_checkMove(down))
                dir = down;
        }
    }
    else
    {
        dir = (_homeDots[0].x() > goal.x() ? left : right);
        if (!_checkMove(dir))
        {
            Directions tmp = _homeDots[0].y() > goal.y() ? up : down;
            if (_checkMove(tmp))
                dir = tmp;
            else if (_checkMove(tmp == up ? down : up))
                dir = (tmp == up ? down : up);
            else if (_checkMove(dir == left ? right : left))
                dir = (dir == left ? right : left);
        }
    }
    if (!_checkMove(dir))
        return false;
    else if (dir != _direction)
    {
        _direction = dir;
        return true;
    }
    else
        return false;
}