using System.Text.Json.Nodes;

using decePubClient.E2E.Support;

using Microsoft.Playwright;

namespace decePubClient.E2E.Actions
{
	// Posts written for later, hashtags followed and what Explore shows, each checked against PrivaPub's own answer
	public sealed class DiscoveryTests(Browser browser)
	{
		[Fact]
		public async Task A_post_scheduled_in_the_composer_waits_is_moved_and_is_dropped()
		{
			var persona = Pasture.Personas().First();
			var text = $"later {Guid.NewGuid():N}"[..20];
			await using var session = await SignIn.As(browser, persona);
			var page = session.Page;
			await Results.Cell("client.action.schedule", "privapub", persona.UserName, async () =>
			{
				await page.EvaluateAsync("() => localStorage.removeItem('FeedFilter')");
				await page.GotoAsync($"{Pasture.Site}/");
				await page.GetByRole(AriaRole.Button, new() { Name = "Post" }).First.ClickAsync();
				await page.Locator("textarea").First.FillAsync(text);
				await page.Locator("button[data-schedule]").ClickAsync();
				await page.Locator("input[data-schedule-at]").FillAsync(DateTime.Now.AddHours(2).ToString("yyyy-MM-ddTHH:mm"));
				await page.GetByRole(AriaRole.Button, new() { Name = "Schedule" }).ClickAsync();
				JsonNode waiting = null;
				Assert.True(await Pasture.Eventually(async () => (waiting = (await PersonaApi.Call(persona, "/api/v1/scheduled_statuses"))!.AsArray()
					.FirstOrDefault(s => s!["params"]!["text"]?.GetValue<string>() == text)) is not null, 15), "PrivaPub never kept the scheduled post");
				var id = waiting!["id"]!.GetValue<string>();
				Assert.DoesNotContain((await PersonaApi.Call(persona, $"/api/v1/accounts/{persona.LocalId}/statuses?limit=10"))!.AsArray(),
					s => s!["content"]!.GetValue<string>().Contains(text));

				await page.GotoAsync($"{Pasture.Site}/scheduled");
				var item = page.Locator($"article[data-scheduled-id='{id}']");
				await Assertions.Expect(item).ToContainTextAsync(text, new() { Timeout = 15000 });
				var later = DateTime.Now.AddHours(5);
				await item.Locator("input[type=datetime-local]").FillAsync(later.ToString("yyyy-MM-ddTHH:mm"));
				await item.GetByRole(AriaRole.Button, new() { Name = "Move" }).ClickAsync();
				Assert.True(await Pasture.Eventually(async () =>
					(await PersonaApi.Call(persona, $"/api/v1/scheduled_statuses/{id}"))?["scheduled_at"]?.GetValue<DateTime>().ToUniversalTime()
						is { } at && Math.Abs((at - later.ToUniversalTime()).TotalMinutes) < 2, 15), "PrivaPub never moved the post");
				await item.GetByRole(AriaRole.Button, new() { Name = "Never publish it" }).ClickAsync();
				await Assertions.Expect(item).ToHaveCountAsync(0, new() { Timeout = 15000 });
				Assert.Null(await PersonaApi.Call(persona, $"/api/v1/scheduled_statuses/{id}"));
				await session.AssertGuards();
			}, page);
		}

		[Fact]
		public async Task A_hashtag_is_followed_from_its_feed_tab_and_listed_in_explore()
		{
			var persona = Pasture.Personas().First();
			var tag = $"e2etag{Guid.NewGuid():N}"[..14];
			await using var session = await SignIn.As(browser, persona);
			var page = session.Page;
			try
			{
				await Results.Cell("client.action.follow-tag", "privapub", persona.UserName, async () =>
				{
					// a reader finds the hashtag through search, which opens it as a tab of the feed
					await page.GotoAsync($"{Pasture.Site}/search?q={Uri.EscapeDataString("#" + tag)}");
					await page.GetByRole(AriaRole.Button, new() { Name = "#" + tag }).ClickAsync(new() { Timeout = 30000 });
					var follow = page.Locator("button[data-tag-follow]");
					await Assertions.Expect(follow).ToContainTextAsync($"Follow #{tag}", new() { Timeout = 30000 });
					await follow.ClickAsync();
					await Assertions.Expect(follow).ToContainTextAsync($"Stop following #{tag}", new() { Timeout = 15000 });
					Assert.True((await PersonaApi.Call(persona, $"/api/v1/tags/{tag}"))!["following"]!.GetValue<bool>());

					await page.GotoAsync($"{Pasture.Site}/explore");
					await page.GetByRole(AriaRole.Tab, new() { Name = "Followed hashtags" }).ClickAsync();
					var row = page.Locator($"[data-tag='{tag}']");
					await row.WaitForAsync(new() { Timeout = 15000 });
					await row.GetByRole(AriaRole.Button, new() { Name = "Unfollow" }).ClickAsync();
					await Assertions.Expect(row).ToHaveCountAsync(0, new() { Timeout = 15000 });
					Assert.False((await PersonaApi.Call(persona, $"/api/v1/tags/{tag}"))!["following"]!.GetValue<bool>());
					await session.AssertGuards();
				}, page);
			}
			finally
			{
				await PersonaApi.Call(persona, $"/api/v1/tags/{tag}/unfollow", HttpMethod.Post);
			}
		}

		[Fact]
		public async Task Explore_shows_what_privapub_says_is_trending_and_its_directory()
		{
			var persona = Pasture.Personas().First();
			var trending = (await PersonaApi.Call(persona, "/api/v1/trends/tags?limit=20"))!.AsArray().Select(t => t!["name"]!.GetValue<string>()).ToList();
			var directory = (await PersonaApi.Call(persona, "/api/v1/directory?order=active&local=false&limit=40"))!.AsArray().Select(a => a!["id"]!.GetValue<string>()).ToList();
			await using var session = await SignIn.As(browser, persona);
			var page = session.Page;
			await Results.Cell("client.render.explore", "privapub", persona.UserName, async () =>
			{
				await page.GotoAsync($"{Pasture.Site}/explore");
				await page.Locator("[data-tag], [data-feed-empty]").First.WaitForAsync(new() { Timeout = 30000 });
				var shownTags = await page.Locator("[data-tag]").EvaluateAllAsync<string[]>("rows => rows.map(r => r.dataset.tag)");
				Assert.Equal(trending, shownTags);

				await page.GetByRole(AriaRole.Tab, new() { Name = "People" }).ClickAsync();
				await page.Locator("[data-account], [data-feed-empty]").First.WaitForAsync(new() { Timeout = 30000 });
				var shownPeople = await page.Locator("[data-account]").EvaluateAllAsync<string[]>("rows => rows.map(r => r.dataset.account)");
				Assert.Equal(directory, shownPeople);
				await session.AssertGuards();
			}, page);
		}
	}
}