/*
 * Author: Andrey Pokidov
 * License: Apache-2.0
 * Date: 1 Feb 2019
 */

namespace BGC
{
    public static class AngleFP64
    {
        public static double ToRadians(double angle, AngleUnit unit)
        {
            if (unit == AngleUnit.DEGREES)
            {
                return angle * DegreeFP64.RADIANS_IN_DEGREE;
            }

            if (unit == AngleUnit.TURNS)
            {
                return angle * RadianFP64.TWO_PI;
            }

            return angle;
        }

        public static double ToDegrees(double angle, AngleUnit unit)
        {
            if (unit == AngleUnit.RADIANS)
            {
                return angle * RadianFP64.DEGREES_IN_RADIAN;
            }

            if (unit == AngleUnit.TURNS)
            {
                return angle * 360.0;
            }

            return angle;
        }

        public static double ToTurns(double angle, AngleUnit unit)
        {
            if (unit == AngleUnit.RADIANS)
            {
                return angle * RadianFP64.TURNS_IN_RADIAN;
            }

            if (unit == AngleUnit.DEGREES)
            {
                return angle * DegreeFP64.TURNS_IN_DEGREE;
            }

            return angle;
        }

        public static double GetFullCircle(AngleUnit unit)
        {
            if (unit == AngleUnit.DEGREES)
            {
                return 360.0;
            }

            if (unit == AngleUnit.TURNS)
            {
                return 1.0;
            }

            return RadianFP64.TWO_PI;
        }
    
        public static double GetHalfCircle(AngleUnit unit)
        {
            if (unit == AngleUnit.DEGREES)
            {
                return 180.0;
            }

            if (unit == AngleUnit.TURNS)
            {
                return 0.5;
            }

            return RadianFP64.PI;
        }
    
        public static double GetQuarterCircle(AngleUnit unit)
        {
            if (unit == AngleUnit.DEGREES)
            {
                return 90.0;
            }

            if (unit == AngleUnit.TURNS)
            {
                return 0.25;
            }

            return RadianFP64.HALF_OF_PI;
        }

        public static double Normalize(double angle, AngleUnit unit, AngleRange range)
        {
            if (unit == AngleUnit.DEGREES)
            {
                return DegreeFP64.Normalize(angle, range);
            }

            if (unit == AngleUnit.TURNS)
            {
                return TurnFP64.Normalize(angle, range);
            }

            return RadianFP64.Normalize(angle, range);
        }
    }
}