#pragma once

class CCellID
{
    // Attributes
public:
    int row, col;

    // Operations
public:
    explicit CCellID(int nRow = -1, int nCol = -1) : row(nRow), col(nCol) {}

    int IsValid() const { return (row >= 0 && col >= 0); }
    int operator==(const CCellID& rhs) const { return (row == rhs.row && col == rhs.col); }
    int operator!=(const CCellID& rhs) const { return !operator==(rhs); }
};

class CCellRange
{
public:

    CCellRange(int nMinRow = -1, int nMinCol = -1, int nMaxRow = -1, int nMaxCol = -1)
    {
        Set(nMinRow, nMinCol, nMaxRow, nMaxCol);
    }

    void Set(int nMinRow = -1, int nMinCol = -1, int nMaxRow = -1, int nMaxCol = -1);

    int  IsValid() const;
    int  InRange(int row, int col) const;
    int  InRange(const CCellID& cellID) const;
    int  Count() { return (m_nMaxRow - m_nMinRow + 1) * (m_nMaxCol - m_nMinCol + 1); }

    CCellID  GetTopLeft() const;
    CCellRange  Intersect(const CCellRange& rhs) const;

    int GetMinRow() const { return m_nMinRow; }
    void SetMinRow(int minRow) { m_nMinRow = minRow; }

    int GetMinCol() const { return m_nMinCol; }
    void SetMinCol(int minCol) { m_nMinCol = minCol; }

    int GetMaxRow() const { return m_nMaxRow; }
    void SetMaxRow(int maxRow) { m_nMaxRow = maxRow; }

    int GetMaxCol() const { return m_nMaxCol; }
    void SetMaxCol(int maxCol) { m_nMaxCol = maxCol; }

    int GetRowSpan() const { return m_nMaxRow - m_nMinRow + 1; }
    int GetColSpan() const { return m_nMaxCol - m_nMinCol + 1; }

    void operator=(const CCellRange& rhs);
    int  operator==(const CCellRange& rhs);
    int  operator!=(const CCellRange& rhs);

protected:
    int m_nMinRow;
    int m_nMinCol;
    int m_nMaxRow;
    int m_nMaxCol;
};

inline void CCellRange::Set(int minRow, int minCol, int maxRow, int maxCol)
{
    m_nMinRow = minRow;
    m_nMinCol = minCol;
    m_nMaxRow = maxRow;
    m_nMaxCol = maxCol;
}

inline void CCellRange::operator=(const CCellRange& rhs)
{
    if (this != &rhs) Set(rhs.m_nMinRow, rhs.m_nMinCol, rhs.m_nMaxRow, rhs.m_nMaxCol);
}

inline int CCellRange::operator==(const CCellRange& rhs)
{
    return ((m_nMinRow == rhs.m_nMinRow) && (m_nMinCol == rhs.m_nMinCol) &&
        (m_nMaxRow == rhs.m_nMaxRow) && (m_nMaxCol == rhs.m_nMaxCol));
}

inline int CCellRange::operator!=(const CCellRange& rhs)
{
    return !operator==(rhs);
}

inline int CCellRange::IsValid() const
{
    return (m_nMinRow >= 0 && m_nMinCol >= 0 && m_nMaxRow >= 0 && m_nMaxCol >= 0 &&
        m_nMinRow <= m_nMaxRow && m_nMinCol <= m_nMaxCol);
}

inline int CCellRange::InRange(int row, int col) const
{
    return (row >= m_nMinRow && row <= m_nMaxRow && col >= m_nMinCol && col <= m_nMaxCol);
}

inline int CCellRange::InRange(const CCellID& cellID) const
{
    return InRange(cellID.row, cellID.col);
}

inline CCellID CCellRange::GetTopLeft() const
{
    return CCellID(m_nMinRow, m_nMinCol);
}

inline CCellRange CCellRange::Intersect(const CCellRange& rhs) const
{
    return CCellRange(max(m_nMinRow, rhs.m_nMinRow), max(m_nMinCol, rhs.m_nMinCol),
        min(m_nMaxRow, rhs.m_nMaxRow), min(m_nMaxCol, rhs.m_nMaxCol));
}