using System.Text.Json;
using Autodesk.AutoCAD.ApplicationServices;
using PRecAnnot.Abstractions;

namespace PRecAnnot.Plant3D2026;

internal sealed record LineNumberApplyPermit
{
    public required bool AllowApply { get; init; }
    public required string FixtureMarkerPath { get; init; }
    public required string ExpectedStableId { get; init; }
    public required string ExpectedText { get; init; }
}

internal static class LineNumberApplyPermitReader
{
    private const string MarkerContent = "P_REC_ANNOT_TEST_FIXTURE=LINE_NUMBER_APPLY";

    public static void Validate(Document document, LineNumberApplyPermit permit, LineNumberApplyPreflight operation)
    {
        if (!permit.AllowApply || !string.Equals(permit.ExpectedStableId, operation.StableId, StringComparison.Ordinal) || !string.Equals(permit.ExpectedText, operation.Text, StringComparison.Ordinal))
            throw new InvalidOperationException("LINE_NUMBER_APPLY_PERMIT_PLAN_MISMATCH");
        if (!Path.IsPathFullyQualified(permit.FixtureMarkerPath) || permit.FixtureMarkerPath.StartsWith("\\\\", StringComparison.Ordinal) || !File.Exists(permit.FixtureMarkerPath) || !string.Equals(File.ReadAllText(permit.FixtureMarkerPath).Trim(), MarkerContent, StringComparison.Ordinal))
            throw new InvalidOperationException("LINE_NUMBER_APPLY_TEST_FIXTURE_REQUIRED");
        var fixtureRoot = Path.GetDirectoryName(Path.GetFullPath(permit.FixtureMarkerPath))! + Path.DirectorySeparatorChar;
        if (!Path.GetFullPath(document.Name).StartsWith(fixtureRoot, StringComparison.OrdinalIgnoreCase)) throw new InvalidOperationException("LINE_NUMBER_APPLY_TEST_FIXTURE_REQUIRED");
    }

    public static LineNumberApplyPermit Read()
    {
        var path = Environment.GetEnvironmentVariable("P_REC_ANNOT_LINE_NUMBER_APPLY_PERMIT_PATH");
        if (string.IsNullOrWhiteSpace(path) || !Path.IsPathFullyQualified(path) || path.StartsWith("\\\\", StringComparison.Ordinal) || !File.Exists(path))
            throw new InvalidOperationException("LINE_NUMBER_APPLY_PERMIT_REQUIRED");
        return JsonSerializer.Deserialize<LineNumberApplyPermit>(File.ReadAllText(path), new JsonSerializerOptions { PropertyNameCaseInsensitive = true })
            ?? throw new InvalidOperationException("LINE_NUMBER_APPLY_PERMIT_INVALID");
    }
}