using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.AdminUI.Uns;
using ZB.MOM.WW.OtOpcUa.Core.Abstractions;

namespace ZB.MOM.WW.OtOpcUa.AdminUI.Tests.Uns;

/// <summary>
///     lmxopcua#848: a driver's NAME is checked against the credential references stored on other drivers. Naming a driver
///     after another same-type driver's (shared) secret segment or env part would make that reference name "another
///     instance" and fail its next deploy; renaming a driver away from a name its own references are named after would
///     free that name for every other driver's Test Connect / browse / save. Both are refused at create, at the /raw
///     rename and at the config modal's update.
/// </summary>
[Trait("Category", "Unit")]
public sealed class CredentialNameClaimSavePathTests
{
    private static CancellationToken Ct => TestContext.Current.CancellationToken;

    private static string Galaxy(string reference) =>
        """{"Gateway":{"Endpoint":"http://gw:5001","ApiKeySecretRef":"REF"}}""".Replace("REF", reference);

    private static async Task<(RawTreeService Svc, string Db, string SharerId)> WithSharerAsync(string reference)
    {
        var name = RawTreeTestDb.SeedFresh();
        var svc = new RawTreeService(RawTreeTestDb.Factory(name));
        var sharer = await svc.CreateDriverAsync(RawTreeTestDb.ClusterId, null, "Sharer", DriverTypeNames.Galaxy, Galaxy(reference), Ct);
        sharer.Ok.ShouldBeTrue(sharer.Error);
        return (svc, name, sharer.CreatedId!);
    }

    private static byte[] RowVersion(string db, string driverId)
    {
        using var ctx = RawTreeTestDb.CreateNamed(db);
        return ctx.DriverInstances.Single(d => d.DriverInstanceId == driverId).RowVersion;
    }

    [Theory]
    [InlineData("secret:galaxy/gw/very-private-name", "gw")]
    [InlineData("secret:galaxy/gw/very-private-name", "GW")]          // case-insensitive, as the rule matches
    [InlineData("env:GALAXY_MXGW_API_KEY_VERY_PRIVATE", "api")]       // #849 env form: API is a '_'-bounded prefix
    [InlineData("env:OTOPCUA_GALAXY_LINE_1_VERY_PRIVATE", "line-1")]  // normalised LINE_1
    public async Task Creating_a_driver_named_after_another_drivers_reference_is_refused(string reference, string newName)
    {
        var (svc, db, sharerId) = await WithSharerAsync(reference);

        var result = await svc.CreateDriverAsync(RawTreeTestDb.ClusterId, null, newName, DriverTypeNames.Galaxy, "{}", Ct);

        result.Ok.ShouldBeFalse();
        result.Error!.ShouldContain("lmxopcua#848");
        result.Error!.ShouldContain("Sharer");
        result.Error!.ShouldContain(sharerId);
        result.Error!.ShouldContain("Gateway.ApiKeySecretRef");
        result.Error!.ShouldNotContain("PRIVATE", Case.Insensitive); // never the rest of the reference
        using var check = RawTreeTestDb.CreateNamed(db);
        check.DriverInstances.ShouldNotContain(d => d.Name == newName);
    }

    [Fact]
    public async Task A_device_level_reference_claims_the_name_too()
    {
        var (svc, db, sharerId) = await WithSharerAsync("secret:galaxy/sharer-own/k");
        using (var ctx = RawTreeTestDb.CreateNamed(db))
        {
            var device = ctx.Devices.Single(d => d.DriverInstanceId == sharerId);
            device.DeviceConfig = Galaxy("secret:galaxy/plant7/k");
            ctx.SaveChanges();
        }

        var result = await svc.CreateDriverAsync(RawTreeTestDb.ClusterId, null, "Plant7", DriverTypeNames.Galaxy, "{}", Ct);

        result.Ok.ShouldBeFalse();
        result.Error!.ShouldContain("device 'Device1'");
    }

    [Fact]
    public async Task Another_driver_type_and_unrelated_names_are_not_claimed()
    {
        var (svc, _, _) = await WithSharerAsync("secret:galaxy/gw/k");

        (await svc.CreateDriverAsync(RawTreeTestDb.ClusterId, null, "gw", DriverTypeNames.OpcUaClient, "{}", Ct)).Ok.ShouldBeTrue();
        (await svc.CreateDriverAsync(RawTreeTestDb.ClusterId, null, "gw2", DriverTypeNames.Galaxy, "{}", Ct)).Ok.ShouldBeTrue();
    }

    [Fact]
    public async Task Renaming_onto_a_claimed_name_is_refused_on_both_rename_paths()
    {
        var (svc, db, _) = await WithSharerAsync("secret:galaxy/gw/k");
        var other = await svc.CreateDriverAsync(RawTreeTestDb.ClusterId, null, "Other", DriverTypeNames.Galaxy, "{}", Ct);
        other.Ok.ShouldBeTrue(other.Error);

        var renamed = await svc.RenameDriverAsync(other.CreatedId!, "gw", RowVersion(db, other.CreatedId!), Ct);
        renamed.Ok.ShouldBeFalse();
        renamed.Error!.ShouldContain("lmxopcua#848");

        var updated = await svc.UpdateDriverAsync(other.CreatedId!, "gw", "{}", null, RowVersion(db, other.CreatedId!), Ct);
        updated.Ok.ShouldBeFalse();
        updated.Error!.ShouldContain("lmxopcua#848");

        using var check = RawTreeTestDb.CreateNamed(db);
        check.DriverInstances.Single(d => d.DriverInstanceId == other.CreatedId).Name.ShouldBe("Other");
    }

    /// <summary>Issue (b): renaming the victim away from the name its own secret lives under would free that name.</summary>
    [Theory]
    [InlineData("secret:galaxy/Sharer/apikey")]
    [InlineData("env:OTOPCUA_GALAXY_SHARER_KEY")]
    public async Task A_driver_whose_references_are_named_after_it_cannot_be_renamed_away(string reference)
    {
        var (svc, db, sharerId) = await WithSharerAsync(reference);

        var renamed = await svc.RenameDriverAsync(sharerId, "Sharer-old", RowVersion(db, sharerId), Ct);
        renamed.Ok.ShouldBeFalse();
        renamed.Error!.ShouldContain("lmxopcua#848");
        renamed.Error!.ShouldContain(sharerId); // points at the id-scoped form

        (await svc.UpdateDriverAsync(sharerId, "Sharer-old", Galaxy(reference), null, RowVersion(db, sharerId), Ct)).Ok.ShouldBeFalse();
    }

    [Fact]
    public async Task Re_pointing_to_the_id_in_the_same_save_allows_the_rename()
    {
        var (svc, db, sharerId) = await WithSharerAsync("secret:galaxy/Sharer/apikey");

        var updated = await svc.UpdateDriverAsync(
            sharerId, "Sharer-new", Galaxy($"secret:galaxy/{sharerId}/apikey"), null, RowVersion(db, sharerId), Ct);

        updated.Ok.ShouldBeTrue(updated.Error);
    }

    [Theory]
    [InlineData("sharer")] // case-only: the rule matches case-insensitively, so nothing is freed or claimed
    [InlineData("Renamed")]
    public async Task Renames_that_free_and_claim_nothing_pass(string newName)
    {
        var reference = newName == "sharer" ? "secret:galaxy/Sharer/apikey" : "secret:galaxy/shared-gw/apikey";
        var (svc, db, sharerId) = await WithSharerAsync(reference);

        var renamed = await svc.RenameDriverAsync(sharerId, newName, RowVersion(db, sharerId), Ct);

        renamed.Ok.ShouldBeTrue(renamed.Error);
    }

    /// <summary>
    ///     #849 review: a name in the system-generated id form ('drv', 'DRV-&lt;12 hex&gt;…') would shadow every driver's
    ///     id-form references — refused at create, the /raw rename and the config modal, even with no reference stored.
    /// </summary>
    [Theory]
    [InlineData("drv")]
    [InlineData("DRV")]
    [InlineData("DRV-0123456789ab")]
    [InlineData("drv-0123456789AB-line")]
    public async Task An_id_shaped_name_is_refused_on_every_name_path(string newName)
    {
        var (svc, db, sharerId) = await WithSharerAsync("env:OTOPCUA_GALAXY_DRV_0123456789AB_KEY");

        var create = await svc.CreateDriverAsync(RawTreeTestDb.ClusterId, null, newName, DriverTypeNames.Galaxy, "{}", Ct);
        create.Ok.ShouldBeFalse();
        create.Error!.ShouldContain("system-generated driver id");

        (await svc.RenameDriverAsync(sharerId, newName, RowVersion(db, sharerId), Ct)).Ok.ShouldBeFalse();
        (await svc.UpdateDriverAsync(sharerId, newName, "{}", null, RowVersion(db, sharerId), Ct)).Ok.ShouldBeFalse();

        // A type without credential rules is not affected.
        (await svc.CreateDriverAsync(RawTreeTestDb.ClusterId, null, newName, DriverTypeNames.Modbus, "{}", Ct)).Ok.ShouldBeTrue();
    }
}