using MongoDB.Bson;

using PrivaPub.Infrastructure.Ids;
using PrivaPub.Models.User;

using GroupEntity = PrivaPub.Models.Group.Group;

namespace PrivaPub.Tests.Infrastructure
{
	public class PrivacyIdsTests
	{
		[Fact]
		public void Persona_ids_carry_only_the_day_and_share_nothing_else()
		{
			var first = (string)new Avatar().GenerateNewID();
			var second = (string)new Avatar().GenerateNewID();

			Assert.True(ObjectId.TryParse(first, out var a));
			Assert.True(ObjectId.TryParse(second, out var b));
			Assert.Equal(DateTime.UtcNow.Date, a.CreationTime);
			Assert.Equal(a.CreationTime, b.CreationTime);
			Assert.NotEqual(first[8..14], second[8..14]);
			Assert.Equal(DateTime.UtcNow.Date, ObjectId.Parse((string)new GroupEntity().GenerateNewID()).CreationTime);
		}

		[Fact]
		public void A_remote_post_id_sorts_by_its_published_time()
		{
			var older = PrivacyIds.At(new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc));
			var newer = PrivacyIds.At(new DateTime(2025, 1, 2, 0, 0, 0, DateTimeKind.Utc));

			Assert.True(string.CompareOrdinal(older, newer) < 0);
			Assert.Equal(new DateTime(2025, 1, 1, 0, 0, 0, DateTimeKind.Utc), ObjectId.Parse(older).CreationTime);
		}

		[Fact]
		public void A_published_time_in_the_future_is_clamped() =>
			Assert.True(ObjectId.Parse(PrivacyIds.At(DateTime.UtcNow.AddYears(50))).CreationTime < DateTime.UtcNow.AddDays(2));
	}
}