using System.Text.Json.Nodes;

using decePubClient.E2E.Support;

using Microsoft.Playwright;

namespace decePubClient.E2E.Actions
{
	// A vote in another server's poll and an emoji reaction to another server's post, done in decePub and counted on that
	// server. The first of either asks the persona, once, to accept that both are public (an owner decision).
	public sealed class VoteAndReactTests(Browser browser)
	{
		static readonly Lazy<JsonArray> Expected = new(() => Pasture.Town("expect").GetAwaiter().GetResult().AsArray());

		static TheoryData<string, string> Pick(Func<JsonNode, bool> wanted, params string[] origins)
		{
			var data = new TheoryData<string, string>();
			var personas = Pasture.Personas().Select(p => p.UserName).ToHashSet();
			foreach (var origin in origins)
			{
				var item = Expected.Value.FirstOrDefault(i => i!["origin"]!.GetValue<string>() == origin && wanted(i)
					&& i["readers"]!.AsArray().Any(r => personas.Contains(r!.GetValue<string>())));
				if (item is not null)
					data.Add(origin, item["ref"]!.GetValue<string>());
			}
			return data;
		}

		public static TheoryData<string, string> Polls() =>
			Pick(i => i["poll"] is JsonArray, "gts", "mastodon", "misskey", "sharkey", "akkoma", "hollo");

		public static TheoryData<string, string> Reactable() =>
			Pick(i => i["visibility"]!.GetValue<string>() is "public" or "unlisted", "misskey", "sharkey", "akkoma");


		async Task<(JsonNode Item, Session Session, ILocator Card)> Open(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>()))
				.Last(p => p is not null);
			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 (item, session, card);
		}

		// the one-time notice, when this persona has not seen it yet
		static async Task AcceptNoticeIfAsked(IPage page)
		{
			var proceed = page.GetByRole(AriaRole.Button, new() { Name = "Continue" });
			try
			{
				await proceed.WaitForAsync(new() { Timeout = 3000 });
				await proceed.ClickAsync();
			}
			catch (TimeoutException)
			{
			}
		}

		static async Task<JsonObject> Row(string origin, string uri) => (await Pasture.Stored(origin, uri))[uri]!.AsObject();

		[Theory]
		[MemberData(nameof(Polls))]
		public async Task A_vote_is_counted_on_the_polls_own_server(string origin, string reference)
		{
			var (item, session, card) = await Open(reference);
			await using var _ = session;
			var uri = item["uri"]!.GetValue<string>();
			var choices = card.Locator("[data-poll] input");
			Assert.SkipWhen(await choices.CountAsync() == 0, "this persona already voted, or the poll is closed");
			await Results.Cell("client.action.vote", origin, reference, async () =>
			{
				var before = (await Row(origin, uri))["votes"]?.AsArray().Sum(v => v?.GetValue<int>() ?? 0) ?? 0;
				await choices.First.CheckAsync();
				await card.Locator("[data-poll]").GetByRole(AriaRole.Button, new() { Name = "Vote" }).ClickAsync();
				await AcceptNoticeIfAsked(session.Page);
				await Assertions.Expect(card.Locator("[data-poll] input")).ToHaveCountAsync(0, new() { Timeout = 15000 });
				Assert.True(await Pasture.Eventually(async () =>
					((await Row(origin, uri))["votes"]?.AsArray().Sum(v => v?.GetValue<int>() ?? 0) ?? 0) > before, 45),
					$"the vote never counted on {origin}");
				await session.AssertGuards();
			});
		}

		[Theory]
		[MemberData(nameof(Reactable))]
		public async Task A_reaction_reaches_the_posts_server_and_its_withdrawal_too(string origin, string reference)
		{
			var (item, session, card) = await Open(reference);
			await using var _ = session;
			var uri = item["uri"]!.GetValue<string>();
			const string emoji = "🔥";
			await Results.Cell("client.action.react", origin, reference, async () =>
			{
				static int Count(JsonObject row) => row["reactions"]?[emoji]?.GetValue<int>() ?? 0;
				var before = Count(await Row(origin, uri));
				await card.Locator("footer [title='React']").First.ClickAsync();
				await card.GetByRole(AriaRole.Button, new() { Name = emoji, Exact = true }).First.ClickAsync();
				await AcceptNoticeIfAsked(session.Page);
				var chip = card.Locator("[data-reactions] button").Filter(new() { HasText = emoji }).First;
				await Assertions.Expect(chip).ToHaveClassAsync(new System.Text.RegularExpressions.Regex("btn-active"), new() { Timeout = 15000 });
				Assert.True(await Pasture.Eventually(async () => Count(await Row(origin, uri)) > before, 45),
					$"the reaction never reached {origin}");

				await chip.ClickAsync();
				Assert.True(await Pasture.Eventually(async () => Count(await Row(origin, uri)) == before, 60),
					$"withdrawing the reaction never reached {origin}");
				await session.AssertGuards();
			});
		}
	}
}