using MongoDB.Entities;

using PrivaPub.ClientModels.Post;
using PrivaPub.Federation.Objects;
using PrivaPub.Models.Post;
using PrivaPub.Tests.Support;

using System.Text.Json.Nodes;

namespace PrivaPub.Tests.Federation
{
	[Trait("Category", "Integration")]
	public sealed class InboundRoutingTests : IAsyncLifetime
	{
		Harness _harness;

		public async ValueTask InitializeAsync()
		{
			Assert.SkipUnless(MongoFixture.Enabled, MongoFixture.Skip);
			_harness = await Harness.Start();
		}

		public async ValueTask DisposeAsync()
		{
			if (_harness != default)
				await _harness.DisposeAsync();
		}

		static string Origin(RemoteActor actor) => new Uri(actor.Id).GetLeftPart(UriPartial.Authority);

		static string NewId(RemoteActor actor, string kind) => $"{Origin(actor)}/{kind}/{Guid.NewGuid():N}";

		async Task<Post> LocalPost(string text)
		{
			var (root, alice) = await _harness.Persona("alice");
			await _harness.Posts.InsertPost(root, new InsertPostForm { AvatarId = alice.Id, Text = text }, TestContext.Current.CancellationToken);
			return await DB.Default.Find<Post>().Match(p => p.GroupUserId == alice.Id).ExecuteFirstAsync(TestContext.Current.CancellationToken);
		}

		[Fact]
		public async Task A_downvote_counts_and_its_undo_takes_it_back()
		{
			var token = TestContext.Current.CancellationToken;
			var post = await LocalPost("vote on me");
			var lemmy = new RemoteActor(_harness.Peer, "voter");
			var dislike = new JsonObject { ["id"] = NewId(lemmy, "activities/dislike"), ["type"] = "Dislike", ["actor"] = lemmy.Id, ["object"] = post.ObjectURI };

			await _harness.Deliver(lemmy, "/human-centipede", dislike);
			Assert.Equal(1, (await DB.Default.Find<Post>().OneAsync(post.ID, token)).DownvotesCount);

			await _harness.Deliver(lemmy, "/human-centipede", new JsonObject
			{
				["id"] = NewId(lemmy, "activities/undo"), ["type"] = "Undo", ["actor"] = lemmy.Id, ["object"] = dislike.DeepClone()
			});
			Assert.Equal(0, (await DB.Default.Find<Post>().OneAsync(post.ID, token)).DownvotesCount);
		}

		[Fact]
		public async Task A_delete_that_arrives_first_keeps_the_post_from_coming_back()
		{
			var token = TestContext.Current.CancellationToken;
			var (_, alice) = await _harness.Persona("alice");
			var mallory = new RemoteActor(_harness.Peer, "mallory");
			var noteId = NewId(mallory, "notes");

			await _harness.Deliver(mallory, "/human-centipede", new JsonObject
			{
				["id"] = NewId(mallory, "activities/delete"), ["type"] = "Delete", ["actor"] = mallory.Id,
				["object"] = new JsonObject { ["id"] = noteId, ["type"] = "Tombstone" }
			});
			await _harness.Deliver(mallory, "/human-centipede", new JsonObject
			{
				["id"] = NewId(mallory, "activities/create"), ["type"] = "Create", ["actor"] = mallory.Id,
				["object"] = new JsonObject
				{
					["id"] = noteId, ["type"] = "Note", ["attributedTo"] = mallory.Id, ["content"] = "<p>late</p>",
					["to"] = new JsonArray(Addressing.Public), ["cc"] = new JsonArray(alice.Uri),
					["tag"] = new JsonArray(new JsonObject { ["type"] = "Mention", ["href"] = alice.Uri, ["name"] = "@alice" })
				}
			});

			Assert.False(await DB.Default.Find<Post>().Match(p => p.ObjectURI == noteId).ExecuteAnyAsync(token));
		}

		[Fact]
		public async Task A_lemmy_private_message_arrives_as_a_direct_message()
		{
			var token = TestContext.Current.CancellationToken;
			var (_, alice) = await _harness.Persona("alice");
			var lemmy = new RemoteActor(_harness.Peer, "pm");
			var messageId = NewId(lemmy, "private_message");

			await _harness.Deliver(lemmy, "/human-centipede", new JsonObject
			{
				["id"] = NewId(lemmy, "activities/create"), ["type"] = "Create", ["actor"] = lemmy.Id, ["to"] = new JsonArray(alice.Uri),
				["object"] = new JsonObject
				{
					["id"] = messageId, ["type"] = "ChatMessage", ["attributedTo"] = lemmy.Id, ["to"] = new JsonArray(alice.Uri),
					["content"] = "<p>psst</p>", ["mediaType"] = "text/html", ["published"] = DateTime.UtcNow.ToString("O")
				}
			});

			var message = await DB.Default.Find<Post>().Match(p => p.ObjectURI == messageId).ExecuteFirstAsync(token);
			Assert.NotNull(message);
			Assert.Equal(PostVisibility.Direct, message.Visibility);
			Assert.NotNull(message.ConversationId);
		}

		[Fact]
		public async Task A_join_of_a_local_post_is_answered_with_ignore()
		{
			var post = await LocalPost("not an event");
			var mobilizon = new RemoteActor(_harness.Peer, "joiner");

			await _harness.Deliver(mobilizon, "/human-centipede", new JsonObject
			{
				["id"] = NewId(mobilizon, "join"), ["type"] = "Join", ["actor"] = mobilizon.Id, ["object"] = post.ObjectURI
			});

			var answer = Assert.Single(await _harness.Outgoing(mobilizon.Id + "/inbox"));
			Assert.Equal("Ignore", answer["type"]!.GetValue<string>());
		}
	}
}