using OfficeIMO.Markdown;
using OfficeIMO.Markdown.Pdf;

namespace OfficeIMO.Examples.Showcase;

/// <summary>Runs the focused document examples consumed by the website's shared showcase catalog.</summary>
internal static partial class DocumentFeatureShowcase {
    internal static void Example(string folderPath, string? group = null) {
        string output = Path.Combine(folderPath, "DocumentFeatures");
        Directory.CreateDirectory(output);
        var groups = new Dictionary<string, Action<string>>(StringComparer.OrdinalIgnoreCase) {
            ["word"] = CreateWordExamples,
            ["excel"] = CreateExcelExamples,
            ["powerpoint"] = CreatePowerPointExamples,
            ["pdf"] = CreatePdfExamples,
            ["markdown"] = CreateMarkdownExamples
        };
        if (group is not null && !groups.ContainsKey(group)) {
            throw new ArgumentException("Unknown showcase group: " + group, nameof(group));
        }
        foreach (var entry in groups) {
            if (group is null || entry.Key.Equals(group, StringComparison.OrdinalIgnoreCase)) {
                entry.Value(output);
                Console.WriteLine("Showcase group complete: " + entry.Key);
            }
        }
    }

    private static string CreateExampleFolder(string output, string id) {
        string folder = Path.Combine(output, id);
        Directory.CreateDirectory(folder);
        return folder;
    }

    private static void SaveMarkdownPreview(string markdownPath, string pdfPath) {
        var document = MarkdownDoc.Load(markdownPath);
        document.SaveAsPdf(pdfPath, new MarkdownToPdfOptions {
            Theme = MarkdownVisualTheme.Report().WithColorScheme(MarkdownColorSchemeKind.Blue)
        });
    }

    private static void CreateMarkdownExamples(string output) {
        string folder = CreateExampleFolder(output, "markdown-technical-guide");
        MarkdownDoc document = MarkdownDoc.Create()
            .H1("A repeatable document workflow")
            .P("A compact technical guide authored with the Markdown builder.")
            .H2("1. Describe the document")
            .P("Keep data, document construction, and delivery as separate steps.")
            .Code("csharp", "var report = MarkdownDoc.Create()\n    .H1(\"Weekly delivery\")\n    .P(\"Generated from application data.\");")
            .H2("2. Check the output")
            .Table(table => table.Headers("Check", "Purpose")
                .Row("Source text", "Keep an editable, portable input")
                .Row("PDF preview", "Inspect page flow and typography")
                .Row("Output hash", "Identify the generated artifact"))
            .Callout("tip", "Start small", "Build a representative document before adding a batch pipeline.")
            .H2("3. Share the result")
            .Ul(list => list.Item("Keep the original Markdown alongside the PDF.")
                .Item("Use the same guide in repository documentation and a report bundle."));
        string source = Path.Combine(folder, "technical-guide.md");
        File.WriteAllText(source, document.ToMarkdown());
        SaveMarkdownPreview(source, Path.Combine(folder, "technical-guide.pdf"));
    }
}