using Microsoft.Extensions.Configuration;
using Shouldly;
using Xunit;

namespace ZB.MOM.WW.OtOpcUa.Runtime.Tests.Historian;

/// <summary>#603: the single "is this node's LocalDb replicated" predicate shared by table registration and the alarm drain gate.</summary>
public sealed class LocalDbReplicationPolicyTests
{
    private static IConfiguration Config(params (string Key, string? Value)[] pairs) =>
        new ConfigurationBuilder()
            .AddInMemoryCollection(pairs.Select(p => new KeyValuePair<string, string?>(p.Key, p.Value)))
            .Build();

    /// <summary>PeerAddress OR ApiKey counts; the listen port alone and blank values do not.</summary>
    [Theory]
    [InlineData("LocalDb:Replication:PeerAddress", "http://peer:9001", true)]
    [InlineData("LocalDb:Replication:ApiKey", "k", true)]
    [InlineData("LocalDb:SyncListenPort", "9001", false)]
    [InlineData("LocalDb:Replication:ApiKey", "  ", false)]
    public void IsConfigured_follows_the_PeerAddress_or_ApiKey_rule(string key, string value, bool expected)
    {
        LocalDbReplicationPolicy.IsConfigured(Config((key, value))).ShouldBe(expected);
    }

    /// <summary>No replication keys at all is an unpaired node.</summary>
    [Fact]
    public void IsConfigured_is_false_for_an_empty_configuration()
    {
        LocalDbReplicationPolicy.IsConfigured(Config()).ShouldBeFalse();
    }
}