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

using decePubClient.E2E.Support;

using Microsoft.Playwright;

namespace decePubClient.E2E.Actions
{
	// A Smithereen account that follows the persona writes on its wall (FEP-400e): the card says so, and the persona takes
	// it off from the card's menu, which deletes it on Smithereen too. SocialPub's tools/pasture/scenarios/smithereen.sh
	// checks the rest of the wire.
	public sealed class WallTests(Browser browser)
	{
		// Smithereen's VKontakte-like API as smuser (the token SocialPub's peers/smithereen.sh keeps)
		static async Task<JsonNode> Smithereen(string token, string method, params (string Name, string Value)[] args)
		{
			using var http = Pasture.Http();
			using var request = new HttpRequestMessage(HttpMethod.Post, $"https://smithereen.test/api/method/{method}")
			{
				Content = new FormUrlEncodedContent(args.Select(a => KeyValuePair.Create(a.Name, a.Value)).Append(KeyValuePair.Create("v", "1.0")))
			};
			request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);
			using var response = await http.SendAsync(request);
			return JsonNode.Parse(await response.Content.ReadAsStringAsync());
		}

		[Fact]
		public async Task A_post_on_the_personas_wall_says_so_and_the_persona_takes_it_off()
		{
			var tokenFile = Path.Combine(Pasture.Root, ".state", "smithereen", "smuser.token");
			Assert.SkipUnless(File.Exists(tokenFile), "no Smithereen: run tools/pasture/run.sh add smithereen");
			var token = File.ReadAllText(tokenFile).Trim();
			// (one whose follows need no approval)
			var persona = default(Pasture.Persona);
			var me = default(JsonNode);
			foreach (var candidate in Pasture.Personas())
			{
				me = await PersonaApi.Call(candidate, "/api/v1/accounts/verify_credentials");
				if (me?["locked"]?.GetValue<bool>() == false)
				{
					persona = candidate;
					break;
				}
			}
			Assert.SkipWhen(persona is null, "every persona of the town is locked");
			var actorUri = me["url"]!.GetValue<string>().Replace("/@", "/peasants/");
			// (its profile told again, so Smithereen reads its wall; smuser follows it, as its followers may write there)
			await PersonaApi.Call(persona, "/api/v1/accounts/update_credentials", HttpMethod.Patch, new JsonObject());
			var personaOnSm = (await Smithereen(token, "utils.loadRemoteObject", ("q", actorUri)))?["response"]?["id"]?.ToString();
			Assert.SkipWhen(string.IsNullOrEmpty(personaOnSm), "Smithereen cannot resolve the persona");
			await Smithereen(token, "friends.add", ("user_id", personaOnSm));
			try
			{
				var smuser = (await PersonaApi.Call(persona, "/api/v2/search?q=smuser%40smithereen.test&resolve=true&type=accounts"))!["accounts"]![0]!["id"]!.GetValue<string>();
				Assert.True(await Pasture.Eventually(async () =>
					(await PersonaApi.Call(persona, $"/api/v1/accounts/relationships?id[]={smuser}"))![0]!["followed_by"]!.GetValue<bool>(), 45), "smuser never followed the persona");

				var text = $"a word on the wall {Guid.NewGuid():N}"[..32];
				// (Smithereen lets its followers write there once the persona's Accept has reached it, which may be after
				// PrivaPub counts the follow)
				var written = default(string);
				Assert.True(await Pasture.Eventually(async () =>
					!string.IsNullOrEmpty(written = (await Smithereen(token, "wall.post", ("owner_id", personaOnSm), ("message", text)))?["response"]?.ToString()), 30),
					"Smithereen refused smuser's post on the persona's wall");
				JsonNode status = null;
				Assert.True(await Pasture.Eventually(async () =>
					(status = (await PersonaApi.Call(persona, "/api/v1/timelines/home?limit=40"))!.AsArray()
						.FirstOrDefault(s => s!["content"]!.GetValue<string>().Contains(text))) is not null, 60), "the post on the wall never reached the persona");
				Assert.Equal(me["id"]!.GetValue<string>(), status!["privapub"]?["wall"]?["id"]?.GetValue<string>());

				await using var session = await SignIn.As(browser, persona);
				var page = session.Page;
				await Results.Cell("client.action.wall", "smithereen", persona.UserName, async () =>
				{
					await page.GotoAsync($"{Pasture.Site}/");
					await page.EvaluateAsync("() => localStorage.removeItem('FeedFilter')");
					await page.GotoAsync($"{Pasture.Site}/");
					var card = page.Locator($"article[data-uri='{status["uri"]!.GetValue<string>()}']").First;
					await card.WaitForAsync(new() { Timeout = 30000 });

					await Assertions.Expect(card.Locator("[data-wall]")).ToBeVisibleAsync();
					await Assertions.Expect(card.Locator("[data-wall]")).ToContainTextAsync(me["display_name"]!.GetValue<string>() is { Length: > 0 } name ? name : me["username"]!.GetValue<string>());
					await card.Locator("footer [title='Other'] > [role=button]").ClickAsync();
					await card.Locator("button[data-take-off-wall]").ClickAsync();
					Assert.True(await Pasture.Eventually(async () => await PersonaApi.Call(persona, $"/api/v1/statuses/{status["id"]!.GetValue<string>()}") is null, 15),
						"the post is still on PrivaPub");
					Assert.True(await Pasture.Eventually(async () =>
						(await Smithereen(token, "wall.getById", ("posts", written)))?["response"] is not JsonArray { Count: > 0 }, 30), "the post is still on Smithereen");
					await session.AssertGuards();
				}, page);
			}
			finally
			{
				// (the town as it was: smuser no longer follows the persona)
				await Smithereen(token, "friends.delete", ("user_id", personaOnSm));
			}
		}
	}
}