#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 = ChordRecipe.Create("color-dimension", mode);
var context = new VisualRenderContext(
    new VisualLayoutOptions(new VisualSize(800, 440)), theme, mode,
    new VisualFrame("Transfer volume and latency", "Illustrative latency colors flows; transfer counts retain their weights", 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>Directed team transfers retain parallel, reciprocal, self and zero-valued flow identities.</summary>
public static class ChordRecipe {
    public static Chart Create(string variant = "wide", VisualThemeMode mode = VisualThemeMode.Light) {
        var configured = variant == "options";
        var transfers = ChartSeries.CreateChord(new ChartSeriesId("transfer-source"), "Transfers", new[] {
            new ChartNode("north", "North"), new ChartNode("south", "South"),
            new ChartNode("north-support", configured ? "Support" : "Services"), new ChartNode("south-support", "Support")
        }, new[] {
            new ChartFlowLink("north-south", "north", "south", 18), new ChartFlowLink("south-north", "south", "north", 7),
            new ChartFlowLink("north-standard", "north", "north-support", 12), new ChartFlowLink("north-priority", "north", "north-support", 5),
            new ChartFlowLink("support-south", "north-support", "south", 9), new ChartFlowLink("south-support", "south", "south-support", 14),
            new ChartFlowLink("support-return", "south-support", "north", 4), new ChartFlowLink("support-internal", "south-support", "south-support", 3),
            new ChartFlowLink("zero-transfer", "north-support", "south-support", 0)
        });
        var chart = Chart.Create().AddSeries(transfers);
        if (configured) {
            chart.ConfigureChord(options => {
                options.StartAngleDegrees = -120; options.SweepAngleDegrees = 300;
                options.NodeGapDegrees = 5; options.NodeThicknessRatio = .09; options.RibbonOpacity = .45;
                options.LabelContent = ChartChordLabelContent.LabelAndTotals;
            });
            transfers.WithNodeState("north-support", ChartSeriesState.Warning)
                .WithFlowStyle("north-priority", new ChartFlowStyle(fill: ChartColor.FromHex("#AF6B24"), fillOpacity: .7,
                    fillPattern: ChartFillPattern.DiagonalForward, stroke: ChartColor.FromHex("#764415"), strokeWidth: 1))
                .WithFlowState("north-priority", ChartSeriesState.Warning).WithFlowStyle("support-internal", new ChartFlowStyle(strokeWidth: 1));
        }
        if (variant is "color-dimension" or "compact-color-dimension") {
            // Illustrative measurements color the existing transfers; they are not additional flow weights.
            var latency = new double?[] { 180, 95, 125, 40, 0, null, 65, 110, 210 };
            transfers.ReplaceFlowData(transfers.Nodes, transfers.FlowLinks.Select((flow, index) =>
                new ChartFlowLink(flow.Id, flow.SourceId, flow.TargetId, flow.Value, latency[index])));
            transfers.ShowInLegend = false;
            chart.WithLegend(true).ConfigureLabels(labels => labels.NoData = "Not sampled").ConfigureChord(options => {
                options.ColorScale = ChartColorScale.Sequential(new[] {
                    new ChartColorStop(0, ChartColor.FromHex("#2166AC")), new ChartColorStop(50, ChartColor.FromHex("#67A9CF")),
                    new ChartColorStop(150, ChartColor.FromHex("#D9A441")), new ChartColorStop(240, ChartColor.FromHex("#B2182B"))
                }).WithCaptions(new[] { new ChartColorScaleCaption(50, "Prompt"), new ChartColorScaleCaption(100, "Expected"), new ChartColorScaleCaption(200, "Delayed") });
                options.ColorDimension.Name = "Illustrative latency";
                options.ColorDimension.ValueFormat = ChartValueFormat.Number("0 'ms'", CultureInfo.InvariantCulture);
                options.ColorDimension.LegendStyle = ChartColorLegendStyle.Gradient;
            });
        }
        return chart;
    }
}