using System.Text.Json.Nodes;

using decePubClient.E2E.Support;

using Microsoft.Playwright;

namespace decePubClient.E2E.Actions
{
	// Settings as a persona: its profile saved (update_credentials) and read back from PrivaPub, a server blocked and
	// unblocked, the follows exported and servers imported in Mastodon's files, and a new persona made; what a test changes
	// is put back through the API afterwards, but for the persona (PrivaPub keeps every persona, so the test makes it under
	// the scenarios' own root, never a town one)
	public sealed class SettingsTests(Browser browser)
	{
		static async Task<ILocator> Open(IPage page, string section)
		{
			await page.GotoAsync($"{Pasture.Site}/settings");
			var header = page.Locator(".collapse-title", new() { HasText = section }).First;
			await header.ClickAsync();
			return header.Locator("xpath=..");
		}

		static JsonObject Restore(JsonNode account)
		{
			var fields = new JsonObject();
			var source = account["source"]!;
			var kept = source["fields"]!.AsArray();
			for (var i = 0; i < 4; i++)
				fields[i.ToString()] = new JsonObject
				{
					["name"] = i < kept.Count ? kept[i]!["name"]!.GetValue<string>() : "",
					["value"] = i < kept.Count ? kept[i]!["value"]!.GetValue<string>() : ""
				};
			return new JsonObject
			{
				["display_name"] = account["display_name"]!.GetValue<string>(),
				["note"] = source["note"]!.GetValue<string>(),
				["locked"] = account["locked"]!.GetValue<bool>(),
				["source"] = new JsonObject { ["privacy"] = source["privacy"]!.GetValue<string>() },
				["fields_attributes"] = fields
			};
		}

		[Fact]
		public async Task The_personas_profile_is_saved_from_settings()
		{
			var persona = Pasture.Personas().Last();
			var original = (await PersonaApi.Call(persona, "/api/v1/accounts/verify_credentials"))!;
			var mark = Guid.NewGuid().ToString("N")[..6];
			await using var session = await SignIn.As(browser, persona);
			var page = session.Page;
			try
			{
				await Results.Cell("client.action.profile-edit", "privapub", persona.UserName, async () =>
				{
					var panel = await Open(page, "Profile");
					var editor = panel.Locator("[data-profile-editor]");
					await editor.WaitForAsync(new() { Timeout = 30000 });
					await Assertions.Expect(editor.Locator("[data-profile-name]")).ToHaveValueAsync(original["display_name"]!.GetValue<string>(),
						new() { Timeout = 10000 });

					await editor.Locator("[data-profile-name]").FillAsync($"Edited {mark}");
					await editor.Locator("[data-profile-note]").FillAsync($"A biography written in the e2e tests {mark}");
					var row = editor.Locator("[data-profile-field='3'] input");
					await row.Nth(0).FillAsync("e2e");
					await row.Nth(1).FillAsync(mark);
					await editor.Locator("[data-profile-privacy]").SelectOptionAsync("Unlisted");
					await editor.Locator("[data-profile-save]").ClickAsync();
					await Assertions.Expect(page.GetByText("Profile saved.")).ToBeVisibleAsync(new() { Timeout = 15000 });

					var saved = (await PersonaApi.Call(persona, "/api/v1/accounts/verify_credentials"))!;
					Assert.Equal($"Edited {mark}", saved["display_name"]!.GetValue<string>());
					Assert.Equal($"A biography written in the e2e tests {mark}", saved["source"]!["note"]!.GetValue<string>());
					Assert.Equal("unlisted", saved["source"]!["privacy"]!.GetValue<string>());
					Assert.Contains(saved["source"]!["fields"]!.AsArray(), f => f!["name"]!.GetValue<string>() == "e2e" && f["value"]!.GetValue<string>() == mark);
					// the persona chooser shows the new name at once
					await Assertions.Expect(page.GetByText($"Edited {mark}", new() { Exact = true }).First).ToBeVisibleAsync(new() { Timeout = 5000 });
					await session.AssertGuards();
				}, page);
			}
			finally
			{
				await PersonaApi.Call(persona, "/api/v1/accounts/update_credentials", HttpMethod.Patch, Restore(original));
			}
		}

		[Fact]
		public async Task A_server_is_blocked_and_unblocked_from_settings()
		{
			var persona = Pasture.Personas().Last();
			const string server = "blocked-by-e2e.example";
			await using var session = await SignIn.As(browser, persona);
			var page = session.Page;
			try
			{
				await Results.Cell("client.action.domain-block", "privapub", persona.UserName, async () =>
				{
					var panel = await Open(page, "Mutes/Blocks");
					var servers = panel.Locator("[data-domain-blocks]");
					await servers.WaitForAsync(new() { Timeout = 30000 });

					await servers.Locator("[data-domain-new]").FillAsync($"https://{server.ToUpperInvariant()}/about");
					await servers.GetByRole(AriaRole.Button, new() { Name = "Block server" }).ClickAsync();
					await Assertions.Expect(servers.Locator($"[data-domain='{server}']")).ToBeVisibleAsync(new() { Timeout = 15000 });
					Assert.Contains(server, (await PersonaApi.Call(persona, "/api/v1/domain_blocks"))!.AsArray().Select(d => d!.GetValue<string>()));

					await servers.Locator($"[data-domain='{server}']").GetByRole(AriaRole.Button, new() { Name = "Unblock" }).ClickAsync();
					await Assertions.Expect(servers.Locator($"[data-domain='{server}']")).ToHaveCountAsync(0, new() { Timeout = 15000 });
					Assert.DoesNotContain(server, (await PersonaApi.Call(persona, "/api/v1/domain_blocks"))!.AsArray().Select(d => d!.GetValue<string>()));
					await session.AssertGuards();
				}, page);
			}
			finally
			{
				await PersonaApi.Call(persona, $"/api/v1/domain_blocks?domain={server}", HttpMethod.Delete);
			}
		}

		// the follows export is Mastodon's following_accounts.csv, naming every account in full
		[Fact]
		public async Task The_follows_are_exported_in_mastodons_format()
		{
			var persona = Pasture.Personas().First();
			var following = (await PersonaApi.Call(persona, $"/api/v1/accounts/{persona.LocalId}/following?limit=80"))!.AsArray();
			Assert.SkipWhen(following.Count == 0, $"{persona.UserName} follows nobody in this town");
			await using var session = await SignIn.As(browser, persona);
			var page = session.Page;
			await Results.Cell("client.action.export", "privapub", persona.UserName, async () =>
			{
				var panel = await Open(page, "Data import/export");
				var button = panel.Locator("[data-export-kind='Follows']");
				await button.WaitForAsync(new() { Timeout = 30000 });
				var download = await page.RunAndWaitForDownloadAsync(() => button.ClickAsync(), new() { Timeout = 60000 });
				Assert.Equal("following_accounts.csv", download.SuggestedFilename);
				var lines = (await File.ReadAllLinesAsync((await download.PathAsync())!)).ToList();
				Assert.Equal("Account address,Show boosts,Notify on new posts,Languages", lines[0]);
				foreach (var account in following)
				{
					var acct = account!["acct"]!.GetValue<string>();
					var full = acct.Contains('@') ? acct : $"{acct}@privapub.test";
					Assert.Contains(lines, l => l.StartsWith(full + ",", StringComparison.Ordinal));
				}
				await session.AssertGuards();
			}, page);
		}

		[Fact]
		public async Task Blocked_servers_are_imported_from_a_mastodon_file()
		{
			var persona = Pasture.Personas().Last();
			string[] servers = ["imported-one.example", "imported-two.example"];
			var csv = Path.Combine(Path.GetTempPath(), $"blocked_domains-{Guid.NewGuid():N}.csv");
			await File.WriteAllTextAsync(csv, string.Join("\n", servers) + "\n");
			await using var session = await SignIn.As(browser, persona);
			var page = session.Page;
			try
			{
				await Results.Cell("client.action.import", "privapub", persona.UserName, async () =>
				{
					var panel = await Open(page, "Data import/export");
					var import = panel.Locator("[data-import]");
					await import.WaitForAsync(new() { Timeout = 30000 });
					await import.Locator("[data-import-kind]").SelectOptionAsync("ServerBlocks");
					await import.Locator("[data-import-file]").SetInputFilesAsync(csv);
					await import.Locator("[data-import-start]").ClickAsync();
					await Assertions.Expect(import.Locator("[data-import-report]")).ToContainTextAsync("2 of 2 done, 0 could not be.", new() { Timeout = 30000 });
					var blocked = (await PersonaApi.Call(persona, "/api/v1/domain_blocks"))!.AsArray().Select(d => d!.GetValue<string>()).ToList();
					Assert.All(servers, s => Assert.Contains(s, blocked));
					await session.AssertGuards();
				}, page);
			}
			finally
			{
				foreach (var server in servers)
					await PersonaApi.Call(persona, $"/api/v1/domain_blocks?domain={server}", HttpMethod.Delete);
				File.Delete(csv);
			}
		}

		[Fact]
		public async Task A_new_persona_is_made_and_used()
		{
			var name = $"e2e_{Guid.NewGuid():N}"[..12];
			await using var session = await SignIn.As(browser, new Pasture.Persona("alice", "alice", "pastureroot", "Pasture-Pass-1!", null, null, null));
			var page = session.Page;
			await Results.Cell("client.action.persona-create", "privapub", "pastureroot", async () =>
			{
				var panel = await Open(page, "Personas");
				var form = panel.Locator("[data-persona-new]");
				await form.WaitForAsync(new() { Timeout = 30000 });
				await form.Locator("[data-persona-username]").FillAsync(name);
				await form.Locator("[data-persona-name]").FillAsync($"Made by e2e {name}");
				await form.Locator("[data-persona-biography]").FillAsync("A persona the end-to-end tests made.");
				await form.Locator("[data-persona-create]").ClickAsync();
				var made = panel.Locator($"[data-persona='{name}']");
				await made.WaitForAsync(new() { Timeout = 15000 });

				await made.GetByRole(AriaRole.Button, new() { Name = "Use" }).ClickAsync();
				await Assertions.Expect(made).ToContainTextAsync("in use", new() { Timeout = 15000 });
				await Assertions.Expect(page.GetByText($"Made by e2e {name}", new() { Exact = true }).First).ToBeVisibleAsync();
				using var http = Pasture.Http();
				var webfinger = await http.GetAsync($"{Pasture.Api}/.well-known/webfinger?resource=acct:{name}@privapub.test");
				Assert.True(webfinger.IsSuccessStatusCode, $"{name} is not found by WebFinger");
				await session.AssertGuards();
			}, page);
		}
	}
}