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;

// Optional exact gallery typography; copy the gallery's fonts directory beside this program.
FontRegistry.Register("CFX Proof Carlito", "fonts/Carlito-Regular.ttf", 400);
FontRegistry.Register("CFX Proof Carlito", "fonts/Carlito-Bold.ttf", 700);
var mode = VisualThemeMode.Dark;
var theme = VisualTheme.Graphite();
var model = ProgressRingRecipe.Create("wide", mode);
var context = new VisualRenderContext(
    new VisualLayoutOptions(new VisualSize(800, 440)), theme, mode,
    new VisualFrame("Completion by delivery stage", "Explore the data, then download the chart", showLegend: null, showSurface: false), FontSpec.FromFamily("CFX Proof Carlito"));
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());

/// <summary>Delivery-stage completion values rendered as independent progress rings.</summary>
public static class ProgressRingRecipe {
    /// <summary>Creates stage completion rings; the options variant adjusts their radius and stroke.</summary>
    public static Chart Create(string variant = "wide", VisualThemeMode mode = VisualThemeMode.Light) {
        if (variant is not ("wide" or "compact" or "sparse" or "options" or "compact-options"))
            throw new ArgumentOutOfRangeException(nameof(variant));
        var points = (variant == "sparse" ? new[] { 1, 3, 6 } : Enumerable.Range(1, 6))
            .Select(index => new ChartPoint(index, 20 + index * 7 % 29));
        var completion = new ChartSeries(new ChartSeriesId("completion"), "Completion", ChartSeriesKind.ProgressRing, points);
        var chart = Chart.Create().WithXLabels("Received", "Qualified", "Reviewed", "Verified", "Approved", "Complete")
            .AddSeries(completion).WithProgressRingCenterLabel()
            .WithValueFormat(ChartValueFormat.Number("0.##", System.Globalization.CultureInfo.InvariantCulture));
        if (variant == "options") chart.WithRadialProgressRadiusScale(.85).WithRadialProgressStrokeScale(1.2);
        return chart;
    }
}