using PrivaPub.Federation.Actors;
using PrivaPub.Models.Jobs;
using PrivaPub.Tests.Support;
using PrivaPub.Tests.Support.Host;

using System.Net;
using System.Text.Json.Nodes;

namespace PrivaPub.Tests.Http
{
	// Lemmy 1.0's multi-communities and PieFed's feeds are `Feed` actors whose `following` is their communities
	[Trait("Category", "Integration")]
	public sealed class MastodonFeedTests : IAsyncLifetime
	{
		PrivaPubHost _host;
		Peer _peer;

		public async ValueTask InitializeAsync()
		{
			Assert.SkipUnless(MongoFixture.Enabled, MongoFixture.Skip);
			_host = await PrivaPubHost.Shared();
			_peer = await Peer.Start();
		}

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

		[Fact]
		public async Task A_feed_shows_as_an_account_whose_following_is_its_communities()
		{
			var token = TestContext.Current.CancellationToken;
			var reader = await _host.Mastodon("feeder");
			var cats = new RemoteActor(_peer, "cats", type: "Group");
			var dogs = new RemoteActor(_peer, "dogs", type: "Group");
			var name = $"feed{Guid.NewGuid():N}"[..12];
			var feed = $"{_peer.A}/m/{name}";
			// as Lemmy serves one: the instance's inbox and key, its text in `description`
			_peer.Serve($"/m/{name}", new JsonObject
			{
				["@context"] = new JsonArray("https://join-lemmy.org/context.json", "https://www.w3.org/ns/activitystreams"),
				["type"] = "Feed", ["id"] = feed, ["inbox"] = $"{_peer.A}/inbox",
				["publicKey"] = new JsonObject { ["id"] = $"{_peer.A}/#main-key", ["owner"] = $"{_peer.A}/", ["publicKeyPem"] = "-----BEGIN PUBLIC KEY-----\n-----END PUBLIC KEY-----\n" },
				["following"] = $"{feed}/following", ["preferredUsername"] = name, ["name"] = "Pets", ["description"] = "every pet",
				["attributedTo"] = $"{_peer.A}/users/owner"
			}.ToJsonString());
			_peer.Serve($"/m/{name}/following", new JsonObject
			{
				["type"] = "Collection", ["id"] = $"{feed}/following", ["totalItems"] = 2, ["items"] = new JsonArray(cats.Id, dogs.Id)
			}.ToJsonString());

			var account = await _host.Get<IRemoteActorService>().GetActor(feed, refresh: true, token);
			Assert.NotNull(account);
			await _host.Run(j => j.Kind == JobKind.CountAccount && j.Payload == feed, token);

			var shown = (await reader.Client.Get($"/api/v1/accounts/{account.ID}")).Ok().Body;
			Assert.Equal(("Pets", 2), (shown.Text("display_name"), shown.Number("following_count")));
			Assert.Contains("every pet", shown.Text("note"));
			var communities = (await reader.Client.Get($"/api/v1/accounts/{account.ID}/following")).Ok().Array;
			Assert.Equal(new[] { cats.Id, dogs.Id }, communities.Select(c => c.Text("uri")));
			Assert.All(communities, c => Assert.True(c!["group"]!.GetValue<bool>()));
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await reader.Client.Post($"/api/v1/accounts/{account.ID}/follow")).Status);
		}
	}
}