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 = TopologyRecipe.Create("expanded", mode);
var context = new VisualRenderContext(
    new VisualLayoutOptions(new VisualSize(960, 600)), theme, mode,
    new VisualFrame("Service request topology", "Groups, status, details and routed links", 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.Topology).ToHtmlPage());

/// <summary>Creates a service topology or an atlas of the available node shapes.</summary>
public static class TopologyRecipe {
    /// <summary>Creates the diagram model for an expanded, compact or shape-atlas view.</summary>
    /// <param name="variant">Use wide, expanded or compact for the service topology, or shapes for the shape atlas.</param>
    /// <param name="mode">The rendering mode; diagram colors are resolved when the model is prepared.</param>
    public static TopologyChart Create(string variant = "wide", VisualThemeMode mode = VisualThemeMode.Light) {
        if (variant is not ("wide" or "expanded" or "compact" or "shapes"))
            throw new ArgumentOutOfRangeException(nameof(variant), variant, "Use wide, expanded, compact or shapes.");

        var atlas = variant == "shapes";
        var chart = TopologyChart.Create();
        chart.Id = atlas ? "shape-atlas" : "service-topology";
        chart.DefaultRenderOptions = new TopologyRenderOptions {
            FitContentToViewport = true,
            WrapNodeLabels = true,
            IncludeLegend = true,
            IncludeGroupStatusDots = true
        };

        if (atlas) {
            var shapes = Enum.GetValues<TopologyNodeShape>();
            for (var index = 0; index < shapes.Length; index++) {
                chart.Nodes.Add(new TopologyNode {
                    Id = "shape-" + index,
                    Label = shapes[index].ToString(),
                    X = 24 + index % 5 * 160,
                    Y = 24 + index / 5 * 120,
                    Width = 132,
                    Height = 86,
                    Shape = shapes[index],
                    PreserveDisplayModeSize = true,
                    ShowStatusBadge = false
                });
            }
            return chart;
        }

        chart.Groups.Add(new TopologyGroup {
            Id = "primary", Label = "Primary region", X = 0, Y = 0, Width = 340, Height = 300,
            Status = TopologyHealthStatus.Healthy
        });
        chart.Groups.Add(new TopologyGroup {
            Id = "secondary", Label = "Secondary region", X = 390, Y = 0, Width = 340, Height = 300,
            Status = TopologyHealthStatus.Warning
        });

        var source = new TopologyNode {
            Id = "client", Label = "Client service", Subtitle = "Requests", X = 30, Y = 65, Width = 240, Height = 85,
            Kind = TopologyNodeKind.Server, GroupId = "primary", Status = TopologyHealthStatus.Healthy
        };
        source.Details.Add(new TopologyNodeDetail {
            Label = "State", Value = "Available", Status = TopologyHealthStatus.Healthy
        });
        chart.Nodes.Add(source);
        chart.Nodes.Add(new TopologyNode {
            Id = "cache", Label = "Cache", X = 70, Y = 210, Width = 150, Height = 65,
            Shape = TopologyNodeShape.Cylinder, GroupId = "primary"
        });
        chart.Nodes.Add(new TopologyNode {
            Id = "worker", Label = "Processing service", X = 430, Y = 65, Width = 240, Height = 85,
            Kind = TopologyNodeKind.Server, GroupId = "secondary", Status = TopologyHealthStatus.Warning
        });
        chart.Nodes.Add(new TopologyNode {
            Id = "store", Label = "Result store", X = 470, Y = 210, Width = 150, Height = 65,
            Shape = TopologyNodeShape.Cylinder, GroupId = "secondary"
        });

        chart.Edges.Add(new TopologyEdge {
            Id = "request", SourceNodeId = "client", TargetNodeId = "worker", Label = "Requests", SecondaryLabel = "Active",
            Routing = TopologyEdgeRouting.ObstacleAvoidingOrthogonal, Direction = VisualLinkDirection.Forward
        });
        chart.Edges.Add(new TopologyEdge {
            Id = "cache-read", SourceNodeId = "client", TargetNodeId = "cache", Label = "Lookup", Routing = TopologyEdgeRouting.Curved,
            LineStyle = TopologyEdgeLineStyle.Dashed, Direction = VisualLinkDirection.Bidirectional
        });
        chart.Edges.Add(new TopologyEdge {
            Id = "persist", SourceNodeId = "worker", TargetNodeId = "store", Label = "Persist",
            Routing = TopologyEdgeRouting.Orthogonal
        });
        chart.Legend = TopologyLegend.Create()
            .AddStatus("Available", TopologyHealthStatus.Healthy)
            .AddStatus("Review", TopologyHealthStatus.Warning)
            .AddNodeKind("Service", TopologyNodeKind.Server)
            .AddEdgeKind("Dependency", TopologyEdgeKind.Dependency, lineStyle: TopologyEdgeLineStyle.Dashed);
        return chart;
    }
}