using PRecAnnot.Abstractions;
using PRecAnnot.Core;

namespace PRecAnnot.Plant3D2026;

internal sealed record LineNumberRuntimeConfiguration(LineNumberAnnotationSettings Annotations, AnnotateLineNumbersAssets Assets, LineConnectionAssets Connections);

internal static class LineNumberRuntimeConfigurationReader
{
    public static LineNumberRuntimeConfiguration Read()
    {
        var annotationPath = RequiredLocalFile("P_REC_ANNOT_LINE_NUMBER_ANNOTATION_SETTINGS_PATH");
        var drawingPath = RequiredLocalFile("P_REC_ANNOT_LINE_NUMBER_DRAWING_SETTINGS_PATH");
        var drawingXml = File.ReadAllText(drawingPath);
        return new(new LineNumberAnnotationSettingsLoader().Load(File.ReadAllText(annotationPath)), new AnnotateLineNumbersSettingsLoader().Load(drawingXml), new LineConnectionSettingsLoader().Load(drawingXml));
    }

    private static string RequiredLocalFile(string variable)
    {
        var path = Environment.GetEnvironmentVariable(variable);
        if (string.IsNullOrWhiteSpace(path) || !Path.IsPathFullyQualified(path) || path.StartsWith("\\\\", StringComparison.Ordinal) || !File.Exists(path))
            throw new InvalidOperationException($"LINE_NUMBER_CONFIGURATION_REQUIRED:{variable}");
        return path;
    }
}