using System.Collections.Generic;
using Azimuth;

namespace Glass.PerformanceTests
{
    public static class Scenarios
    {
        public const int Width = 300;
        public const int NarrowWidth = 60;
        public const int VisibleLines = 3;

        public static string NameFor(string textName, string constraint, SpriteFontDefinition font,
            Operation operation)
        {
            return $"{textName}, {constraint}, {SampleFonts.Describe(font)}: {operation}";
        }

        public static void AddEach(List<Scenario> scenarios, string textName, string constraint, Workload workload,
            params Operation[] operations)
        {
            foreach (Operation operation in operations)
            {
                scenarios.Add(new Scenario(NameFor(textName, constraint, workload.Font, operation), workload,
                    operation));
            }
        }

        /// <summary>
        /// Every scenario, in a fixed order so an index names the same one in every process.
        /// </summary>
        public static List<Scenario> BuildAll()
        {
            SpriteFontDefinition font = SampleFonts.Philosopher18;
            string wide = $"{Width}px";
            var returnMe = new List<Scenario>();

            AddEach(returnMe, "label", "unbounded", new Workload(font, Texts.Label),
                Operation.MeasureWidth, Operation.CalculateSize);
            AddEach(returnMe, "label", wide, new Workload(font, Texts.Label, maxWidth: Width),
                Operation.PlaceGlyphs);

            AddEach(returnMe, "tiny label", "unbounded", new Workload(font, Texts.TinyLabel),
                Operation.MeasureWidth, Operation.CalculateSize);

            AddEach(returnMe, "CJK label", "unbounded", new Workload(font, Texts.CjkLabel),
                Operation.MeasureWidth, Operation.CalculateSize);

            AddEach(returnMe, "1 KB prose", wide, new Workload(font, Texts.Prose, maxWidth: Width),
                Operation.CalculateSize, Operation.PlaceGlyphs);
            AddEach(returnMe, "1 KB prose", wide,
                new Workload(SampleFonts.LiberationSans16, Texts.Prose, maxWidth: Width),
                Operation.CalculateSize, Operation.PlaceGlyphs);
            AddEach(returnMe, "1 KB prose", $"{NarrowWidth}px", new Workload(font, Texts.Prose, maxWidth: NarrowWidth),
                Operation.CalculateSize, Operation.PlaceGlyphs);

            Scalar visibleHeight = VisibleLines * font.LineHeight;
            AddEach(returnMe, "1 KB prose", $"{Width}px x {VisibleLines} lines, ellipsis",
                new Workload(font, Texts.Prose, maxWidth: Width, maxHeight: visibleHeight,
                    overflow: TextOverflow.Ellipsis),
                Operation.CalculateSize, Operation.PlaceGlyphs);

            AddEach(returnMe, "20 KB document", wide, new Workload(font, Texts.Document, maxWidth: Width),
                Operation.CalculateSize, Operation.PlaceGlyphs);

            AddEach(returnMe, "512-char hex run", "unbounded", new Workload(font, Texts.HexRun),
                Operation.MeasureWidth);
            AddEach(returnMe, "512-char hex run", wide, new Workload(font, Texts.HexRun, maxWidth: Width),
                Operation.CalculateSize, Operation.PlaceGlyphs);

            AddEach(returnMe, "CJK prose", "unbounded", new Workload(font, Texts.CjkProse),
                Operation.MeasureWidth);
            AddEach(returnMe, "CJK prose", wide, new Workload(font, Texts.CjkProse, maxWidth: Width),
                Operation.CalculateSize, Operation.PlaceGlyphs);

            AddEach(returnMe, "1 KB numbers", wide, new Workload(font, Texts.Numbers, maxWidth: Width),
                Operation.CalculateSize, Operation.PlaceGlyphs);

            return returnMe;
        }
    }
}