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 = ScatterColorDimensionRecipe.Create("compact-gradient-color-legend", mode);
var context = new VisualRenderContext(
    new VisualLayoutOptions(new VisualSize(360, 360)), theme, mode,
    new VisualFrame("Temperature by workload", "A continuous key retains every authored color anchor", 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>Formats a temperature color dimension independently from processing time.</summary>
public static class ScatterColorDimensionRecipe {
    /// <summary>Creates the selected example without choosing a renderer or export backend.</summary>
    public static Chart Create(string variant = "color-dimension", VisualThemeMode mode = VisualThemeMode.Light) {
        if (variant is not ("color-dimension" or "compact-color-dimension" or "gradient-color-legend" or "compact-gradient-color-legend" or "swatch-color-legend" or "compact-swatch-color-legend")) throw new ArgumentOutOfRangeException(nameof(variant));
        return ColorDimension(variant, mode);
    }

    private static Chart ColorDimension(string variant, VisualThemeMode mode) {
        var colors = VisualTheme.Graphite().Resolve(mode);
        var gradient = variant is "gradient-color-legend" or "compact-gradient-color-legend";
        var swatches = variant is "swatch-color-legend" or "compact-swatch-color-legend";
        var minutes = new[] { 18d, 30, 24, 44, 32 };
        var temperatures = new double?[] { -12, 0, null, 2.5, 22.5 };
        var recorded = ChartSeries.CreateScatter(new ChartSeriesId("recorded-batches"), "Recorded batches", temperatures.Select((value, index) =>
            new ChartPoint((index + 1) * 16, minutes[index]).WithColorValue(value)));
        recorded.WithColorScale(TemperatureScale().WithNoDataColor(colors.Border)).ConfigureColorDimension(options => {
            options.Name = "Temperature";
            options.ValueFormat = ChartValueFormat.Number("0.0 '°C'", CultureInfo.GetCultureInfo("pl-PL"));
            options.LegendStyle = gradient ? ChartColorLegendStyle.Gradient : swatches ? ChartColorLegendStyle.Swatches : ChartColorLegendStyle.Auto;
        });
        return NumericAxes().ConfigureLabels(labels => labels.NoData = "Not sampled")
            .WithValueFormat(ChartValueFormat.Number("0.0 'min'", CultureInfo.InvariantCulture)).AddSeries(recorded);
    }

    private static Chart NumericAxes() => Chart.Create().WithXAxis("Batch size (items)").WithYAxis("Processing time (minutes)")
        .WithXAxisBounds(0, 100).WithYAxisBounds(0, 60).WithDataLabels(false);

    private static ChartColorScale TemperatureScale() => ChartColorScale.Diverging(new[] {
        new ChartColorStop(-20, ChartColor.FromHex("#2166AC")), new ChartColorStop(-3, ChartColor.FromHex("#67A9CF"))
    }, new ChartColorStop(0, ChartColor.FromHex("#D1D5DB")), new[] {
        new ChartColorStop(5, ChartColor.FromHex("#D9A441")), new ChartColorStop(40, ChartColor.FromHex("#B2182B"))
    }).WithLabels("Cold", "Freezing", "Warm");
}