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.Light;
var theme = VisualTheme.Graphite();
var model = FunnelRecipe.Create("compact", mode);
var context = new VisualRenderContext(
    new VisualLayoutOptions(new VisualSize(360, 360)), theme, mode,
    new VisualFrame("Requests from receipt to completion", "The same data in a compact view", 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());

/// <summary>Builds an ordered request funnel as proportional stages or a cone.</summary>
public static class FunnelRecipe {
    /// <summary>Creates the selected funnel example, preserving zero-valued completion stages.</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" or "cone-vertical" or "stage-bars-horizontal"))
            throw new ArgumentOutOfRangeException(nameof(variant));
        var chart = Chart.Create().WithDataLabels();
        if (variant is "options" or "compact-options" or "cone-vertical" or "stage-bars-horizontal") {
            var requests = new ChartSeries(new ChartSeriesId("requests"), "Requests", ChartSeriesKind.Funnel, new[] {
                new ChartPoint(1, 100), new ChartPoint(2, 75), new ChartPoint(3, 25), new ChartPoint(4, 0)
            });
            chart.WithXLabels("Received", "Reviewed", "Qualified", "Completed").AddSeries(requests)
                .ConfigureFunnel(options => {
                    options.Form = variant == "stage-bars-horizontal" ? ChartFunnelForm.StageBars : ChartFunnelForm.Cone;
                    options.Orientation = variant == "cone-vertical" ? ChartOrientation.Vertical : ChartOrientation.Horizontal;
                });
        }
        else {
            var requests = new ChartSeries(new ChartSeriesId("requests"), "Requests", ChartSeriesKind.Funnel, new[] {
                new ChartPoint(1, 120), new ChartPoint(2, 95), new ChartPoint(3, 74), new ChartPoint(4, 41)
            });
            chart.WithXLabels("Received", "Qualified", "Reviewed", "Completed").AddSeries(requests);
        }
        return chart.WithValueFormat(ChartValueFormat.Number("0.##", CultureInfo.InvariantCulture));
    }
}