using System.Text.Json.Nodes;

using decePubClient.E2E.Support;

using Microsoft.Playwright;

namespace decePubClient.E2E.Actions
{
	// A list in decePub: made on /lists, filled with an account the persona follows (found by its name among the accounts
	// it follows), read as the feed's Lists tab, made exclusive and deleted. Each step is checked against PrivaPub's own
	// answer to the persona's token, so the page and the server agree on the list, its members and its posts.
	public sealed class ListTests(Browser browser)
	{
		static Task<JsonNode> Api(Pasture.Persona persona, string path, HttpMethod method = null, JsonObject body = null) =>
			PersonaApi.Call(persona, path, method, body);

		// an account the persona follows that has written something
		static async Task<JsonNode> Followed(Pasture.Persona persona) =>
			(await Api(persona, $"/api/v1/accounts/{persona.LocalId}/following?limit=80"))!.AsArray()
				.FirstOrDefault(a => a!["statuses_count"]!.GetValue<int>() > 0 && !a["acct"]!.GetValue<string>().StartsWith("st_"));

		[Fact]
		public async Task An_account_joins_and_leaves_a_list_from_its_profile()
		{
			var persona = Pasture.Personas().First();
			var member = await Followed(persona);
			Assert.SkipWhen(member is null, $"{persona.UserName} follows nobody who has posted");
			var memberId = member!["id"]!.GetValue<string>();
			var listId = (await Api(persona, "/api/v1/lists", HttpMethod.Post, new JsonObject { ["title"] = $"e2e {Guid.NewGuid():N}"[..12] }))!["id"]!.GetValue<string>();
			await using var session = await SignIn.As(browser, persona);
			var page = session.Page;
			try
			{
				await Results.Cell("client.action.list-member", "privapub", persona.UserName, async () =>
				{
					async Task<bool> InList() =>
						(await Api(persona, $"/api/v1/lists/{listId}/accounts"))!.AsArray().Any(a => a!["id"]!.GetValue<string>() == memberId);

					await page.GotoAsync($"{Pasture.Site}/account/{memberId}");
					var profile = page.Locator("article[data-account-id]").First;
					await profile.WaitForAsync(new() { Timeout = 30000 });
					await profile.GetByRole(AriaRole.Button, new() { Name = "Lists" }).ClickAsync();
					var box = profile.Locator($"[data-list-id='{listId}'] input");
					await box.CheckAsync();
					Assert.True(await Pasture.Eventually(InList, 15), "the profile's checkbox never put the account in the list");
					await box.UncheckAsync();
					Assert.True(await Pasture.Eventually(async () => !await InList(), 15), "the profile's checkbox never took the account out");
					await session.AssertGuards();
				}, page);
			}
			finally
			{
				await Api(persona, $"/api/v1/lists/{listId}", HttpMethod.Delete);
			}
		}

		[Fact]
		public async Task A_list_is_made_filled_read_as_a_feed_and_deleted()
		{
			var persona = Pasture.Personas().First();
			var member = await Followed(persona);
			Assert.SkipWhen(member is null, $"{persona.UserName} follows nobody who has posted");
			var memberId = member!["id"]!.GetValue<string>();
			var title = $"e2e {Guid.NewGuid():N}"[..12];
			// lists an earlier failed run left behind
			foreach (var left in (await Api(persona, "/api/v1/lists"))!.AsArray().Where(l => l!["title"]!.GetValue<string>().StartsWith("e2e ")))
				await Api(persona, $"/api/v1/lists/{left!["id"]!.GetValue<string>()}", HttpMethod.Delete);
			await using var session = await SignIn.As(browser, persona);
			var page = session.Page;
			await Results.Cell("client.action.list", "privapub", persona.UserName, async () =>
			{
				await page.GotoAsync($"{Pasture.Site}/lists");
				await page.Locator("[data-list-new] input, input[data-list-new]").First.FillAsync(title);
				await page.GetByRole(AriaRole.Button, new() { Name = "Make a list" }).ClickAsync();
				var article = page.Locator("article[data-list-id]").Filter(new() { HasText = title });
				await article.WaitForAsync(new() { Timeout = 15000 });
				var listId = await article.GetAttributeAsync("data-list-id");
				Assert.Contains((await Api(persona, "/api/v1/lists"))!.AsArray(), l => l!["id"]!.GetValue<string>() == listId);

				// the list opens once made: find the member among the accounts followed, and add it
				await article.Locator("[data-list-find] input, input[data-list-find]").First.FillAsync(member["username"]!.GetValue<string>());
				await article.Locator("[data-list-find] input, input[data-list-find]").First.PressAsync("Enter");
				var candidate = article.Locator($"[data-candidate-id='{memberId}']");
				await candidate.WaitForAsync(new() { Timeout = 15000 });
				await candidate.GetByRole(AriaRole.Button, new() { Name = "Add" }).ClickAsync();
				await article.Locator($"[data-member-id='{memberId}']").WaitForAsync(new() { Timeout = 15000 });
				Assert.Equal([memberId], (await Api(persona, $"/api/v1/lists/{listId}/accounts"))!.AsArray().Select(a => a!["id"]!.GetValue<string>()));

				// read as a feed: the cards are the list timeline's first page, as PrivaPub answers it
				await article.GetByRole(AriaRole.Button, new() { Name = "Read the list" }).ClickAsync();
				await page.Locator("article[data-uri], [data-feed-empty]").First.WaitForAsync(new() { Timeout = 30000 });
				var expected = (await Api(persona, $"/api/v1/timelines/list/{listId}?limit=20"))!.AsArray()
					.Select(s => (s!["reblog"] ?? s)["uri"]!.GetValue<string>()).ToHashSet();
				var shown = await page.Locator("article[data-uri]").EvaluateAllAsync<string[]>("cards => cards.map(c => c.dataset.uri)");
				Assert.NotEmpty(expected);
				Assert.Subset(expected, shown.ToHashSet());

				// exclusive, then deleted
				await page.GotoAsync($"{Pasture.Site}/lists");
				article = page.Locator($"article[data-list-id='{listId}']");
				await article.GetByRole(AriaRole.Button, new() { Name = "Edit" }).ClickAsync();
				await article.GetByLabel("Keep its members out of the home feed").CheckAsync();
				await article.GetByRole(AriaRole.Button, new() { Name = "Save" }).ClickAsync();
				Assert.True(await Pasture.Eventually(async () => (await Api(persona, $"/api/v1/lists/{listId}"))?["exclusive"]?.GetValue<bool>() == true, 15),
					"PrivaPub never made the list exclusive");
				// the icon's glyph (CSS content) is part of a button's name, so names are matched as substrings
				await article.GetByRole(AriaRole.Button, new() { Name = "Delete" }).First.ClickAsync();
				await article.GetByRole(AriaRole.Button, new() { Name = "Delete it for good" }).ClickAsync();
				await Assertions.Expect(article).ToHaveCountAsync(0, new() { Timeout = 15000 });
				Assert.Null(await Api(persona, $"/api/v1/lists/{listId}"));
				await session.AssertGuards();
			}, page);
		}
	}
}