using DXApp.TemplateKitProject.Models;

namespace DXApp.TemplateKitProject.Services;

public class AttachmentViewerService
{
    public AttachmentViewerType DetermineViewerType(string fileName)
    {
        var extension = Path.GetExtension(fileName).ToLowerInvariant();

        return extension switch
        {
            ".pdf" => AttachmentViewerType.Pdf,
            ".xml" => AttachmentViewerType.Xml,
            ".txt" => AttachmentViewerType.Text,
            ".jpg" or ".jpeg" or ".png" or ".gif" => AttachmentViewerType.Image,
            ".docx" or ".doc" => AttachmentViewerType.Word,
            _ => AttachmentViewerType.Download
        };
    }

    public string GetMimeType(string fileName)
    {
        var extension = Path.GetExtension(fileName).ToLowerInvariant();

        return extension switch
        {
            ".pdf" => "application/pdf",
            ".xml" => "application/xml",
            ".txt" => "text/plain",
            ".jpg" or ".jpeg" => "image/jpeg",
            ".png" => "image/png",
            ".gif" => "image/gif",
            ".docx" => "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
            ".doc" => "application/msword",
            _ => "application/octet-stream"
        };
    }
}

public enum AttachmentViewerType
{
    Pdf,        // PDF.js Viewer
    Xml,        // Syntax-highlighted XML
    Text,       // Plain Text
    Image,      // <img> Tag
    Word,       // Konvertierung zu PDF (optional)
    Download    // Nur Download-Button
}