using MongoDB.Bson;
using MongoDB.Bson.Serialization;
using MongoDB.Bson.Serialization.Serializers;
using MongoDB.Driver;
using MongoDB.Entities;

using PrivaPub.Infrastructure.Data;

[assembly: AssemblyFixture(typeof(PrivaPub.Tests.Support.MongoFixture))]

namespace PrivaPub.Tests.Support
{
	public sealed class MongoFixture : IAsyncLifetime
	{
		public const string Skip = "set PRIVAPUB_TEST_MONGOD=1 (and optionally PRIVAPUB_TEST_MONGO) to run the tests that need a mongod";

		public static bool Enabled => Environment.GetEnvironmentVariable("PRIVAPUB_TEST_MONGOD") == "1";

		public string Database { get; } = $"PrivaPubTests_{Guid.NewGuid():N}";

		public async ValueTask InitializeAsync()
		{
			if (!Enabled)
				return;
			try
			{
				BsonSerializer.RegisterSerializer(new GuidSerializer(GuidRepresentation.Standard));
			}
			catch (BsonSerializationException)
			{
			}
			var connection = Environment.GetEnvironmentVariable("PRIVAPUB_TEST_MONGO") ?? "mongodb://127.0.0.1:27017";
			await DB.InitAsync(Database, MongoClientSettings.FromConnectionString(connection));
			EntityMaps.Warm();
			await Indexes.Create();
		}

		public async ValueTask DisposeAsync()
		{
			if (Enabled)
				await DB.Default.Database().Client.DropDatabaseAsync(Database);
		}
	}
}