using System.Collections.Generic;

namespace OpenNest.Shapes
{
    public static class PipeSizes
    {
        public readonly record struct Entry(string Label, double OuterDiameter);

        public static IReadOnlyList<Entry> All { get; } = new[]
        {
            new Entry("1/8",    0.405),
            new Entry("1/4",    0.540),
            new Entry("3/8",    0.675),
            new Entry("1/2",    0.840),
            new Entry("3/4",    1.050),
            new Entry("1",      1.315),
            new Entry("1 1/4",  1.660),
            new Entry("1 1/2",  1.900),
            new Entry("2",      2.375),
            new Entry("2 1/2",  2.875),
            new Entry("3",      3.500),
            new Entry("3 1/2",  4.000),
            new Entry("4",      4.500),
            new Entry("4 1/2",  5.000),
            new Entry("5",      5.563),
            new Entry("6",      6.625),
            new Entry("7",      7.625),
            new Entry("8",      8.625),
            new Entry("9",      9.625),
            new Entry("10",    10.750),
            new Entry("11",    11.750),
            new Entry("12",    12.750),
            new Entry("14",    14.000),
            new Entry("16",    16.000),
            new Entry("18",    18.000),
            new Entry("20",    20.000),
            new Entry("24",    24.000),
            new Entry("26",    26.000),
            new Entry("28",    28.000),
            new Entry("30",    30.000),
            new Entry("32",    32.000),
            new Entry("34",    34.000),
            new Entry("36",    36.000),
            new Entry("42",    42.000),
            new Entry("48",    48.000),
        };

        public static bool TryGetOD(string label, out double outerDiameter)
        {
            foreach (var entry in All)
            {
                if (entry.Label == label)
                {
                    outerDiameter = entry.OuterDiameter;
                    return true;
                }
            }

            outerDiameter = 0;
            return false;
        }

        /// <summary>
        /// Returns all pipe sizes whose outer diameter is less than or equal to <paramref name="maxOD"/>.
        /// The bound is inclusive.
        /// </summary>
        public static IEnumerable<Entry> GetFittingSizes(double maxOD)
        {
            foreach (var entry in All)
            {
                if (entry.OuterDiameter <= maxOD)
                {
                    yield return entry;
                }
            }
        }
    }
}