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.Light;
var theme = VisualTheme.Graphite();
var model = ChartGridRecipe.Create("wide", mode);
var context = new VisualRenderContext(
    new VisualLayoutOptions(new VisualSize(960, 700)), theme, mode,
    new VisualFrame("Requests and capacity", "Three panels share the same axis domains", showLegend: true, 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>A three-panel comparison with shared Cartesian axes.</summary>
public static class ChartGridRecipe {
    public static ChartGrid Create(string variant = "wide", VisualThemeMode mode = VisualThemeMode.Light) {
        var observations = Enumerable.Range(1, 6).Select(index => new ChartPoint(index, 20 + index * 7 % 29)).ToArray();
        var requests = Chart.Create().WithTitle("Observed requests").WithXLabels("Mon", "Tue", "Wed", "Thu", "Fri", "Sat")
            .AddSeries(ChartSeries.CreateLine(new ChartSeriesId("requests"), "Requests", observations))
            .WithValueFormat(ChartValueFormat.Number("0.##", CultureInfo.InvariantCulture));
        var reviewed = Chart.Create().WithTitle("Reviewed requests").WithXLabels("North", "South", "East", "West", "Central", "Online")
            .AddSeries(ChartSeries.CreateBar(new ChartSeriesId("orders"), "Orders", observations))
            .WithValueFormat(ChartValueFormat.Number("0.##", CultureInfo.InvariantCulture));
        var capacity = Chart.Create().WithTitle("Capacity used").WithXLabels("Mon", "Tue", "Wed", "Thu", "Fri", "Sat")
            .AddSeries(ChartSeries.CreateArea(new ChartSeriesId("used-capacity"), "Used capacity", observations))
            .WithValueFormat(ChartValueFormat.Number("0.##", CultureInfo.InvariantCulture));
        return ChartGrid.Create().WithColumns(2).WithGap(16).WithPanelSize(640, 400)
            .Add(requests).Add(reviewed).Add(capacity, 2).WithSharedAxes();
    }
}