namespace Launcher.Next.Application;

public sealed record LegacyProductSelection(string Id, string DisplayName, string Filter, string RequiredFileName, string Pattern, string[] SourceVerifiedLegacyIds, string[] UnmappedLegacyIds, bool SupportsPlantBootstrap);
public sealed record LegacyPluginPlan(string RosterPath, string Source, IReadOnlyList<string> OrderedIds, IReadOnlyList<string> UnmappedIds, string? SnapshotPath = null, string? SnapshotSha256 = null);

public static class LegacyProductSelections
{
    public static readonly LegacyProductSelection Plant3D = new("plant3d", "Plant 3D 2026", "Project files |Project.xml|All files (*.*)|*.*", "Project.xml", "Plant 3D_2019", [], [], true);
    public static readonly LegacyProductSelection Pnid = new("pnid", "Plant P&ID 2026", "Project files |Project.xml|All files (*.*)|*.*", "Project.xml", "Plant PnID_2019", ["c1b999d6c16029e9ac5b1e1a8afe1500", "5b80379c3ec715e7da0ee414c53aa7bc", "1111"], ["c1b999d6c16029e9ac5b1e1a8afe1500", "5b80379c3ec715e7da0ee414c53aa7bc", "1111"], true);
    public static readonly LegacyProductSelection Navisworks = new("navisworks", "Navisworks Manage 2026", "nwd files (*.nwd)|*.nwd|All files (*.*)|*.*", ".nwd", "Navisworks_Manage_2018", ["7dd981169fa14d21aaef3fcdb0e7e970"], ["7dd981169fa14d21aaef3fcdb0e7e970"], false);

    public static LegacyProductSelection For(string id) => id switch { "plant3d" => Plant3D, "pnid" => Pnid, "navisworks" => Navisworks, _ => throw new InvalidOperationException("LEGACY_PRODUCT_UNKNOWN") };

    public static string ValidateSelectedFile(LegacyProductSelection product, string selected)
    {
        var file = Path.GetFullPath(selected);
        if (!File.Exists(file) || File.GetAttributes(file).HasFlag(FileAttributes.ReparsePoint)) throw new InvalidOperationException("LEGACY_PROJECT_FILE_INVALID");
        var correctName = product.RequiredFileName.StartsWith('.') ? file.EndsWith(product.RequiredFileName, StringComparison.OrdinalIgnoreCase) : string.Equals(Path.GetFileName(file), product.RequiredFileName, StringComparison.OrdinalIgnoreCase);
        if (!correctName) throw new InvalidOperationException("LEGACY_PROJECT_FILE_PRODUCT_MISMATCH");
        return file;
    }

    public static string AutomaticRoster(LegacyProductSelection product, string selectedFile)
    {
        var projectDirectory = Path.GetDirectoryName(ValidateSelectedFile(product, selectedFile))!;
        return Path.GetFullPath(Path.Combine(projectDirectory, "..", "_System", product.Pattern, "Applications", "download_list.xml"));
    }

    public static LegacyPluginPlan ReadRoster(LegacyProductSelection product, string selectedFile, string? manualXml, LegacyConfigurationAdapter parser, string? snapshotRoot = null)
    {
        var roster = manualXml is null ? AutomaticRoster(product, selectedFile) : Path.GetFullPath(manualXml);
        if (!File.Exists(roster) || File.GetAttributes(roster).HasFlag(FileAttributes.ReparsePoint) || !string.Equals(Path.GetFileName(roster), "download_list.xml", StringComparison.OrdinalIgnoreCase)) throw new InvalidOperationException("LEGACY_DOWNLOAD_LIST_NOT_FOUND");
        var snapshot = roster.StartsWith(@"\\", StringComparison.Ordinal) && snapshotRoot is not null ? LegacyReadOnlySnapshots.Acquire(roster, snapshotRoot, "project-rosters") : null;
        var ids = parser.ParseDownloadList(File.ReadAllText(snapshot?.LocalSnapshotPath ?? roster)).PluginIds;
        if (product.SourceVerifiedLegacyIds.Length > 0 && ids.Any(id => !product.SourceVerifiedLegacyIds.Contains(id, StringComparer.OrdinalIgnoreCase))) throw new InvalidOperationException("LEGACY_PLUGIN_PRODUCT_MISMATCH");
        return new(roster, manualXml is null ? "Automatic" : "Manual", ids, product.UnmappedLegacyIds.Intersect(ids, StringComparer.OrdinalIgnoreCase).ToArray(), snapshot?.LocalSnapshotPath, snapshot?.Sha256);
    }
}