using System.Text.Json.Nodes;

using decePubClient.E2E.Support;

using Microsoft.Playwright;

namespace decePubClient.E2E.Actions
{
	// What a reader does to a post from each platform, done in decePub and checked on the post's own server: a favourite
	// and a boost arrive there (and leave when undone), a reply lands under the post and is gone once deleted. town.sh
	// stored reads the origin's database, so nothing here trusts decePub's own view of what it did.
	public sealed class ActionMatrixTests(Browser browser)
	{
		static readonly Lazy<JsonArray> Expected = new(() => Pasture.Town("expect").GetAwaiter().GetResult().AsArray());

		public static TheoryData<string, string> Targets()
		{
			var data = new TheoryData<string, string>();
			var personas = Pasture.Personas().Select(p => p.UserName).ToHashSet();
			foreach (var origin in new[] { "gts", "mastodon", "misskey", "sharkey", "akkoma", "lemmy" })
			{
				var item = Expected.Value.FirstOrDefault(i => i!["origin"]!.GetValue<string>() == origin
					&& i["visibility"]!.GetValue<string>() is "public" or "community"
					&& i["readers"]!.AsArray().Any(r => personas.Contains(r!.GetValue<string>())));
				if (item is not null)
					data.Add(origin, item["ref"]!.GetValue<string>());
			}
			return data;
		}

		static (JsonNode Item, Pasture.Persona Reader) Target(string reference)
		{
			var item = Expected.Value.First(i => i!["ref"]!.GetValue<string>() == reference)!;
			var personas = Pasture.Personas();
			var reader = item["readers"]!.AsArray().Select(r => personas.FirstOrDefault(p => p.UserName == r!.GetValue<string>()))
				.First(p => p is not null);
			return (item, reader);
		}

		static async Task<int> Count(string origin, string uri, string field)
		{
			var row = (await Pasture.Stored(origin, uri))[uri]!;
			return row[field]?.GetValue<int?>() ?? 0;
		}

		static async Task<bool> IsActive(ILocator button) =>
			((await button.GetAttributeAsync("class")) ?? "").Split(' ').Contains("btn-active");

		async Task<(Session Session, ILocator Card)> Open(JsonNode item, Pasture.Persona reader)
		{
			var session = await SignIn.As(browser, reader);
			await session.Page.GotoAsync($"{Pasture.Site}/expand/{item["id"]!.GetValue<string>()}");
			var card = session.Page.Locator($"article[data-uri='{item["uri"]!.GetValue<string>()}']").First;
			await card.WaitForAsync(new() { Timeout = 30000 });
			return (session, card);
		}

		[Theory]
		[MemberData(nameof(Targets))]
		public async Task A_favourite_reaches_the_author_and_its_undo_too(string origin, string reference)
		{
			var (item, reader) = Target(reference);
			var uri = item["uri"]!.GetValue<string>();
			await Results.Cell("client.action.favourite", origin, reference, async () =>
			{
				var (session, card) = await Open(item, reader);
				await using var _ = session;
				var favourite = card.Locator("footer button[title='Favourite']").First;
				// the town may have done it already as this persona: start from the undone state
				if (await IsActive(favourite))
				{
					var done = await Count(origin, uri, "likes");
					await favourite.ClickAsync();
					await Pasture.Eventually(async () => await Count(origin, uri, "likes") < done, 60);
					await Assertions.Expect(favourite).Not.ToHaveClassAsync(new System.Text.RegularExpressions.Regex("btn-active"));
				}
				var before = await Count(origin, uri, "likes");
				await favourite.ClickAsync();
				Assert.True(await Pasture.Eventually(async () => await Count(origin, uri, "likes") > before),
					$"the favourite never reached {origin}");
				await favourite.ClickAsync();
				Assert.True(await Pasture.Eventually(async () => await Count(origin, uri, "likes") == before, 60),
					$"undoing the favourite never reached {origin}");
				await session.AssertGuards();
			});
		}

		[Theory]
		[MemberData(nameof(Targets))]
		public async Task A_boost_reaches_the_author_and_its_undo_too(string origin, string reference)
		{
			Assert.SkipWhen(origin == "lemmy", "Lemmy keeps no boosts of a thread");
			var (item, reader) = Target(reference);
			var uri = item["uri"]!.GetValue<string>();
			await Results.Cell("client.action.boost", origin, reference, async () =>
			{
				var (session, card) = await Open(item, reader);
				await using var _ = session;
				var boost = card.Locator("footer button[title='Boost']").First;
				// the town may have done it already as this persona: start from the undone state
				if (await IsActive(boost))
				{
					var done = await Count(origin, uri, "boosts");
					await boost.ClickAsync();
					await Pasture.Eventually(async () => await Count(origin, uri, "boosts") < done, 60);
					await Assertions.Expect(boost).Not.ToHaveClassAsync(new System.Text.RegularExpressions.Regex("btn-active"));
				}
				var before = await Count(origin, uri, "boosts");
				await boost.ClickAsync();
				Assert.True(await Pasture.Eventually(async () => await Count(origin, uri, "boosts") > before),
					$"the boost never reached {origin}");
				await boost.ClickAsync();
				Assert.True(await Pasture.Eventually(async () => await Count(origin, uri, "boosts") == before, 60),
					$"undoing the boost never reached {origin}");
				await session.AssertGuards();
			});
		}

		[Theory]
		[MemberData(nameof(Targets))]
		public async Task A_reply_lands_under_the_post_and_its_delete_removes_it(string origin, string reference)
		{
			var (item, reader) = Target(reference);
			var uri = item["uri"]!.GetValue<string>();
			await Results.Cell("client.action.reply", origin, reference, async () =>
			{
				var (session, card) = await Open(item, reader);
				await using var _ = session;
				await card.Locator("footer button[title='Reply']").First.ClickAsync();
				var text = $"an e2e reply to {reference} ({Guid.NewGuid():N})";
				// after the @names the composer prefills, as a reader types
				var box = card.Locator("textarea").Last;
				await box.FillAsync(((await box.InputValueAsync()).TrimEnd() + " " + text).Trim());
				var published = session.Page.WaitForResponseAsync(r => r.Url.EndsWith("/api/v1/statuses") && r.Request.Method == "POST");
				await card.Locator("button[type=submit]").Last.ClickAsync();
				var response = await published;
				Assert.True(response.Ok, $"publishing the reply answered {response.Status}");
				var replyUri = (await response.JsonAsync())?.GetProperty("uri").GetString();
				Assert.False(string.IsNullOrEmpty(replyUri));

				Assert.True(await Pasture.Eventually(async () =>
				{
					var row = (await Pasture.Stored(origin, replyUri))[replyUri]!;
					return row["exists"]!.GetValue<bool>() && row["parent_uri"]?.GetValue<string>() == uri;
				}, 45), $"the reply never landed under the post on {origin}");

				var reply = session.Page.Locator($"article[data-uri='{replyUri}']").First;
				await reply.WaitForAsync(new() { Timeout = 15000 });
				await reply.Locator("footer [title='Other']").First.ClickAsync();
				await reply.GetByRole(AriaRole.Button).Filter(new() { HasText = "Delete" }).First.ClickAsync();
				await session.Page.Locator("[data-confirm-yes]").ClickAsync();
				Assert.True(await Pasture.Eventually(async () =>
				{
					var row = (await Pasture.Stored(origin, replyUri))[replyUri]!;
					return !row["exists"]!.GetValue<bool>() || row["deleted"]!.GetValue<bool>();
				}, 45), $"the deleted reply is still on {origin}");
				await session.AssertGuards();
			});
		}
	}
}