Working with Units and Amounts

using System;
using TypedUnits;

namespace StandardUnits
{
    public static class SIUnitTypes
    {
        public static readonly UnitType Length = new UnitType("metre");
        public static readonly UnitType Mass = new UnitType("kilogram");
        public static readonly UnitType Time = new UnitType("second");
        public static readonly UnitType ElectricCurrent = new UnitType("ampere");
        public static readonly UnitType ThermodynamicTemperature = new UnitType("kelvin");
        public static readonly UnitType AmountOfSubstance = new UnitType("mole");
        public static readonly UnitType LuminousIntensity = new UnitType("candela");
    }

    [UnitDefinitionClass]
    public static class LengthUnits
    {
        public static readonly Unit Meter = new Unit("meter", "m", SIUnitTypes.Length);
        public static readonly Unit MilliMeter = new Unit("millimeter", "mm", 0.001 * Meter);
        public static readonly Unit CentiMeter = new Unit("centimeter", "cm", 0.01 * Meter);
        public static readonly Unit DeciMeter = new Unit("decimeter", "dm", 0.1 * Meter);
        public static readonly Unit DecaMeter = new Unit("decameter", "Dm", 10.0 * Meter);
        public static readonly Unit HectoMeter = new Unit("hectometer", "Hm", 100.0 * Meter);
        public static readonly Unit KiloMeter = new Unit("kilometer", "km", 1000.0 * Meter);

        public static readonly Unit Inch = new Unit("inch", "in", 0.0254 * Meter);
        public static readonly Unit Foot = new Unit("foot", "ft", 12.0 * Inch);
        public static readonly Unit Yard = new Unit("yard", "yd", 36.0 * Inch);
        public static readonly Unit Mile = new Unit("mile", "mi", 5280.0 * Foot);
        public static readonly Unit NauticalMile = new Unit("nautical mile", "nmi", 1852.0 * Meter);

        public static readonly Unit LightYear = new Unit("light-year", "ly", 9460730472580800.0 * Meter);
    }

    [UnitDefinitionClass]
    public static class SurfaceUnits
    {
        public static readonly Unit Meter2 = new Unit("meter²", "m²", LengthUnits.Meter.Power(2));
        public static readonly Unit Are = new Unit("are", "are", 100.0 * Meter2);
        public static readonly Unit HectAre = new Unit("hectare", "ha", 10000.0 * Meter2);
        public static readonly Unit KiloMeter2 = new Unit("kilometer²", "Km²", LengthUnits.KiloMeter.Power(2));
    }

    [UnitDefinitionClass]
    public static class VolumeUnits
    {
        public static readonly Unit Liter = new Unit("liter", "L", LengthUnits.DeciMeter.Power(3));
        public static readonly Unit MilliLiter = new Unit("milliliter", "mL", 0.001 * Liter);
        public static readonly Unit CentiLiter = new Unit("centiliter", "cL", 0.01 * Liter);
        public static readonly Unit DeciLiter = new Unit("deciliter", "dL", 0.1 * Liter);
        public static readonly Unit Meter3 = new Unit("meter³", "m³", LengthUnits.Meter.Power(3));
    }

    [UnitDefinitionClass]
    public static class TimeUnits
    {
        public static readonly Unit Second = new Unit("second", "s", SIUnitTypes.Time);
        public static readonly Unit MicroSecond = new Unit("microsecond", "μs", 0.000001 * Second);
        public static readonly Unit MilliSecond = new Unit("millisecond", "ms", 0.001 * Second);
        public static readonly Unit Minute = new Unit("minute", "min", 60.0 * Second);
        public static readonly Unit Hour = new Unit("hour", "h", 3600.0 * Second);
        public static readonly Unit Day = new Unit("day", "d", 24.0 * Hour);
    }

    [UnitDefinitionClass]
    public static class SpeedUnits
    {
        public static readonly Unit MeterPerSecond = new Unit("meter/second", "m/s", LengthUnits.Meter / TimeUnits.Second);
        public static readonly Unit KilometerPerHour = new Unit("kilometer/hour", "km/h", LengthUnits.KiloMeter / TimeUnits.Hour);
        public static readonly Unit MilePerHour = new Unit("mile/hour", "mi/h", LengthUnits.Mile / TimeUnits.Hour);
        public static readonly Unit Knot = new Unit("knot", "kn", 1.852 * SpeedUnits.KilometerPerHour);
    }

    [UnitDefinitionClass]
    public static class MassUnits
    {
        public static readonly Unit KiloGram = new Unit("kilogram", "Kg", SIUnitTypes.Mass);
        public static readonly Unit Gram = new Unit("gram", "g", 0.001 * KiloGram);
        public static readonly Unit MilliGram = new Unit("milligram", "mg", 0.001 * Gram);
        public static readonly Unit Ton = new Unit("ton", "ton", 1000.0 * KiloGram);
    }

    [UnitDefinitionClass]
    public static class ForceUnits
    {
        public static readonly Unit Newton = new Unit("newton", "N", LengthUnits.Meter * MassUnits.KiloGram * TimeUnits.Second.Power(-2));
    }

    [UnitDefinitionClass]
    public static class ElectricUnits
    {
        public static readonly Unit Ampere = new Unit("ampere", "amp", SIUnitTypes.ElectricCurrent);
        public static readonly Unit Coulomb = new Unit("coulomb", "C", TimeUnits.Second * Ampere);
        public static readonly Unit Volt = new Unit("volt", "V", EnergyUnits.Watt / Ampere);
        public static readonly Unit Ohm = new Unit("ohm", "Ω", Volt / Ampere);
        public static readonly Unit Farad = new Unit("farad", "F", Coulomb / Volt);
    }

    [UnitDefinitionClass]
    public static class EnergyUnits
    {
        public static readonly Unit Joule = new Unit("joule", "J", LengthUnits.Meter.Power(2) * MassUnits.KiloGram * TimeUnits.Second.Power(-2));
        public static readonly Unit KiloJoule = new Unit("kilojoule", "kJ", 1000.0 * Joule);
        public static readonly Unit MegaJoule = new Unit("megajoule", "MJ", 1000000.0 * Joule);
        public static readonly Unit GigaJoule = new Unit("gigajoule", "GJ", 1000000000.0 * Joule);

        public static readonly Unit Watt = new Unit("watt", "W", Joule / TimeUnits.Second);
        public static readonly Unit KiloWatt = new Unit("kilowatt", "kW", 1000.0 * Watt);
        public static readonly Unit MegaWatt = new Unit("megawatt", "MW", 1000000.0 * Watt);

        public static readonly Unit WattSecond = new Unit("watt-second", "Wsec", Watt * TimeUnits.Second);
        public static readonly Unit WattHour = new Unit("watt-hour", "Wh", Watt * TimeUnits.Hour);
        public static readonly Unit KiloWattHour = new Unit("kilowatt-hour", "kWh", 1000.0 * WattHour);

        public static readonly Unit Calorie = new Unit("calorie", "cal", 4.1868 * Joule);
        public static readonly Unit KiloCalorie = new Unit("kilocalorie", "kcal", 1000.0 * Calorie);

        public static readonly Unit HorsePower = new Unit("horsepower", "hp", 0.73549875 * KiloWatt);
    }

    [UnitDefinitionClass, UnitConversionClass]
    public static class TemperatureUnits
    {
        public static readonly Unit Kelvin = new Unit("Kelvin", "K", SIUnitTypes.ThermodynamicTemperature);
        public static readonly Unit DegreeCelcius = new Unit("degree celcius", "°C", new UnitType("celcius temperature"));
        public static readonly Unit DegreeFahrenheit = new Unit("degree fahrenheit", "°F", new UnitType("fahrenheit temperature"));

        #region Conversion functions

        public static void RegisterConversions()
        {
            // Register conversion functions:

            // Convert Celcius to Fahrenheit:
            UnitManager.RegisterConversion(DegreeCelcius, DegreeFahrenheit, delegate(Amount amount)
            {
                return new Amount(amount.Value * 9.0 / 5.0 + 32.0, DegreeFahrenheit);
            }
            );

            // Convert Fahrenheit to Celcius:
            UnitManager.RegisterConversion(DegreeFahrenheit, DegreeCelcius, delegate(Amount amount)
            {
                return new Amount((amount.Value - 32.0) / 9.0 * 5.0, DegreeCelcius);
            }
            );

            // Convert Celcius to Kelvin:
            UnitManager.RegisterConversion(DegreeCelcius, Kelvin, delegate(Amount amount)
            {
                return new Amount(amount.Value + 273.15, Kelvin);
            }
            );

            // Convert Kelvin to Celcius:
            UnitManager.RegisterConversion(Kelvin, DegreeCelcius, delegate(Amount amount)
            {
                return new Amount(amount.Value - 273.15, DegreeCelcius);
            }
            );

            // Convert Fahrenheit to Kelvin:
            UnitManager.RegisterConversion(DegreeFahrenheit, Kelvin, delegate(Amount amount)
            {
                return amount.ConvertedTo(DegreeCelcius).ConvertedTo(Kelvin);
            }
            );

            // Convert Kelvin to Fahrenheit:
            UnitManager.RegisterConversion(Kelvin, DegreeFahrenheit, delegate(Amount amount)
            {
                return amount.ConvertedTo(DegreeCelcius).ConvertedTo(DegreeFahrenheit);
            }
            );
        }

        #endregion Conversion functions
    }

    [UnitDefinitionClass]
    public static class PressureUnits
    {
        public static readonly Unit Pascal = new Unit("pascal", "Pa", ForceUnits.Newton * LengthUnits.Meter.Power(-2));
        public static readonly Unit HectoPascal = new Unit("hectopascal", "hPa", 100.0 * Pascal);
        public static readonly Unit KiloPascal = new Unit("kilopascal", "KPa", 1000.0 * Pascal);
        public static readonly Unit Bar = new Unit("bar", "bar", 100000.0 * Pascal);
        public static readonly Unit MilliBar = new Unit("millibar", "mbar", 0.001 * Bar);
        public static readonly Unit Atmosphere = new Unit("atmosphere", "atm", 101325.0 * Pascal);
    }

    [UnitDefinitionClass]
    public static class FrequencyUnits
    {
        public static readonly Unit Hertz = new Unit("Hertz", "hz", TimeUnits.Second.Power(-1));
        public static readonly Unit MegaHerts = new Unit("MegaHertz", "Mhz", 1000000.0 * Hertz);
        public static readonly Unit RPM = new Unit("Rounds per minute", "rpm", TimeUnits.Minute.Power(-1));
    }

    [UnitDefinitionClass]
    public static class AmountOfSubstanceUnits
    {
        public static readonly Unit Mole = new Unit("mole", "mol", SIUnitTypes.AmountOfSubstance);
    }

    public static class LuminousIntensityUnits
    {
        public static readonly Unit Candela = new Unit("candela", "cd", SIUnitTypes.LuminousIntensity);
    }
}