using Fake.Application;

namespace Oms.Application.Shared;

/// <summary>
/// 开放接口件重尺单位换算为系统内部单位（kg / cm）。
/// </summary>
public static class OpenApiMeasureUnitConverter
{
    public static decimal ToKilograms(decimal weight, string? weightUnit)
    {
        var unit = string.IsNullOrWhiteSpace(weightUnit) ? "KG" : weightUnit.Trim().ToUpperInvariant();
        return unit switch
        {
            "KG" or "KGS" or "KILOGRAM" or "KILOGRAMS" => weight,
            "G" or "GRAM" or "GRAMS" => weight / 1000m,
            "LB" or "LBS" or "POUND" or "POUNDS" => weight * 0.45359237m,
            _ => throw new BusinessException($"不支持的重量单位：{weightUnit}")
        };
    }

    public static decimal ToCentimeters(decimal length, string? lengthUnit)
    {
        var unit = string.IsNullOrWhiteSpace(lengthUnit) ? "CM" : lengthUnit.Trim().ToUpperInvariant();
        return unit switch
        {
            "CM" or "CMS" or "CENTIMETER" or "CENTIMETERS" => length,
            "MM" or "MILLIMETER" or "MILLIMETERS" => length / 10m,
            "M" or "METER" or "METERS" => length * 100m,
            "IN" or "INCH" or "INCHES" => length * 2.54m,
            _ => throw new BusinessException($"不支持的长度单位：{lengthUnit}")
        };
    }
}