using System.Text.Json.Nodes;

using decePubClient.E2E.Support;

using Microsoft.Playwright;

namespace decePubClient.E2E.Actions
{
	// The home feed hears of a new post and of its deletion through PrivaPub's streaming API, in seconds, where polling
	// would take up to 45
	public sealed class StreamingTests(Browser browser)
	{
		[Fact]
		public async Task A_post_made_elsewhere_waits_behind_the_new_button_and_its_deletion_takes_it_away()
		{
			var persona = Pasture.Personas().First();
			var text = $"streamed {Guid.NewGuid():N}"[..21];
			await using var session = await SignIn.As(browser, persona);
			var page = session.Page;
			// the stream counts once the app has subscribed to the home feed on it (it opens after the first page is read,
			// later on a busy page)
			var subscribed = new TaskCompletionSource();
			page.WebSocket += (_, socket) =>
			{
				if (socket.Url.Contains("/api/v1/streaming"))
					socket.FrameSent += (_, frame) =>
					{
						if (frame.Text?.Contains("\"subscribe\"") == true && frame.Text.Contains("\"user\""))
							subscribed.TrySetResult();
					};
			};
			JsonNode post = null;
			try
			{
				await Results.Cell("client.render.stream", "privapub", persona.UserName, async () =>
				{
					await page.GotoAsync($"{Pasture.Site}/");
					await page.EvaluateAsync("() => localStorage.removeItem('FeedFilter')");
					subscribed = new();
					await page.GotoAsync($"{Pasture.Site}/");
					await page.Locator("article[data-uri], [data-feed-empty]").First.WaitForAsync(new() { Timeout = 30000 });
					await subscribed.Task.WaitAsync(TimeSpan.FromSeconds(30));
					// (and the server has taken the subscription in)
					await Task.Delay(500);

					post = await PersonaApi.Call(persona, "/api/v1/statuses", HttpMethod.Post, new JsonObject { ["status"] = text, ["visibility"] = "unlisted" });
					var fresh = page.GetByRole(AriaRole.Button, new() { Name = "1 new" });
					await fresh.WaitForAsync(new() { Timeout = 10000 });
					await fresh.ClickAsync();
					var card = page.Locator($"article[data-uri='{post!["uri"]!.GetValue<string>()}']");
					await Assertions.Expect(card).ToContainTextAsync(text, new() { Timeout = 5000 });

					await PersonaApi.Call(persona, $"/api/v1/statuses/{post["id"]!.GetValue<string>()}", HttpMethod.Delete);
					post = null;
					await Assertions.Expect(card).ToHaveCountAsync(0, new() { Timeout = 10000 });
					await session.AssertGuards();
				}, page);
			}
			finally
			{
				if (post is not null)
					await PersonaApi.Call(persona, $"/api/v1/statuses/{post["id"]!.GetValue<string>()}", HttpMethod.Delete);
			}
		}
	}
}