namespace QWERTYkez.ExcelProcessor;

/// <summary>
/// Предоставляет типобезопасное представление высоты строки в Excel с поддержкой различных единиц измерения.
/// </summary>
public readonly struct RowHeight(double points)
{
    const double POINTS_PER_INCH = 72.0;
    const double INCH_PER_CM = 1.0 / 2.54;
    const double POINTS_PER_CM = POINTS_PER_INCH * INCH_PER_CM; // ≈ 28.3464566929
    const double POINTS_PER_MM = POINTS_PER_CM / 10.0;          // ≈ 2.83464566929

    const double DXA_PER_POINT = 20.0;   // 1 point = 20 dxa
    const double POINTS_PER_DXA = 1.0 / DXA_PER_POINT;

    /// <summary>Высота в пунктах (points).</summary>
    public double Points { get; } = points;

    public static RowHeight FromPoints(double points) => new(points);
    public static RowHeight FromInch(double inch) => new(inch * POINTS_PER_INCH);
    public static RowHeight FromDXA(double dxa) => new(dxa * POINTS_PER_DXA);
    public static RowHeight FromCM(double cm) => new(cm * POINTS_PER_CM);
    public static RowHeight FromMM(double mm) => new(mm * POINTS_PER_MM);

    public double Inch => Points / POINTS_PER_INCH;
    public double DXA => Points / POINTS_PER_DXA;
    public double CM => Points / POINTS_PER_CM;
    public double MM => Points / POINTS_PER_MM;
}