using MongoDB.Bson;
using QuestionsApi.Services;
using Xunit;

namespace QuestionsApi.Tests;

public sealed class ContentPromotionTests
{
    [Fact]
    public void CollectMediaIdsDeduplicatesValidObjectIds()
    {
        var id = ObjectId.GenerateNewId();
        var questions = new[]
        {
            new BsonDocument("Media", new BsonArray { id.ToString(), "not-an-object-id" }),
            new BsonDocument("Media", new BsonArray { id.ToString() })
        };

        var result = ContentPromotionCommand.CollectMediaIds(questions);

        Assert.Equal(new[] { id }, result);
    }

    [Fact]
    public void ContentHashDoesNotDependOnInputOrder()
    {
        var first = new BsonDocument { ["ExternalId"] = "a", ["Stem"] = "one" };
        var second = new BsonDocument { ["ExternalId"] = "b", ["Stem"] = "two" };

        Assert.Equal(
            ContentPromotionCommand.HashDocuments([first, second]),
            ContentPromotionCommand.HashDocuments([second, first]));
    }
}