#region Setup
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using ChartForgeX.Core;
using ChartForgeX.Primitives;
using ChartForgeX.Rendering;
using ChartForgeX.Themes;
using ChartForgeX.Topology;
using ChartForgeX.Typography;
using ChartForgeX.VisualArtifacts;
using ChartForgeX.VisualBlocks;

var mode = VisualThemeMode.Dark;
var theme = VisualTheme.Graphite();
var model = DumbbellEndpointRecipe.Create("endpoint-markers", mode);
var context = new VisualRenderContext(
    new VisualLayoutOptions(new VisualSize(800, 440)), theme, mode,
    new VisualFrame("Service capacity before and after", "Independent endpoint shapes, sizes and colors preserve source order", showLegend: null, showSurface: false));
var prepared = model.Prepare(context);
File.WriteAllText("visual.svg", prepared.ToSvg());
File.WriteAllBytes("visual.png", prepared.ToPng());
File.WriteAllText("visual.html", prepared.ToArtifact("example", VisualArtifactKind.Chart).ToHtmlPage());
#endregion

/// <summary>Compares service capacity with independent Start and End glyphs on either physical orientation.</summary>
public static class DumbbellEndpointRecipe {
    /// <summary>Creates source-ordered pairs; marker presentation never sorts or replaces the two endpoint values.</summary>
    public static Chart Create(string variant = "endpoint-markers", VisualThemeMode mode = VisualThemeMode.Light) {
        if (variant is not ("horizontal" or "compact-horizontal" or "endpoint-markers" or "compact-endpoint-markers"))
            throw new ArgumentOutOfRangeException(nameof(variant));
        var colors = VisualTheme.Graphite().Resolve(mode);
        var capacity = ChartSeries.CreateDumbbell(new ChartSeriesId("capacity"), "Start / End capacity", new[] {
            new ChartDumbbell(1, 32, 44), new ChartDumbbell(2, 58, 38), new ChartDumbbell(3, 51, 72),
            new ChartDumbbell(4, 43, 67), new ChartDumbbell(5, 81, 58)
        }).WithObservationIds(new[] { "standard", "express", "premium", "bulk", "return" }.Select(id => new ChartObservationId(id)))
            .ConfigureDumbbell(options => {
                options.StartMarker.Shape = ChartMarkerShape.Circle; options.StartMarker.Radius = 4;
                options.StartMarker.Fill = colors.Palette[1];
                options.EndMarker.Shape = ChartMarkerShape.Diamond; options.EndMarker.Radius = 8;
                options.EndMarker.Fill = colors.Palette[0]; options.EndMarker.Stroke = colors.Surface; options.EndMarker.StrokeWidth = 1;
            });
        var chart = Chart.Create().WithXLabels("Standard", "Express", "Premium", "Bulk", "Return")
            .WithLegend(true).WithDataLabels(false).AddSeries(capacity)
            .WithValueFormat(ChartValueFormat.Number("0", CultureInfo.InvariantCulture));
        if (variant.EndsWith("horizontal", StringComparison.Ordinal)) {
            chart.Options.DumbbellOrientation = ChartOrientation.Horizontal;
            chart.WithXAxis("Capacity").WithYAxis("Service");
        } else chart.WithXAxis("Service").WithYAxis("Capacity");
        return chart;
    }
}