// Copyright (c) The Geekeey Authors
// SPDX-License-Identifier: EUPL-1.2

using System.Diagnostics;
using System.Text.RegularExpressions;

namespace Geekeey.Arcade.NET.Tests;

public sealed class SdkPackageIntegrationTests
{

	private static string RepositoryPath
	{
		get
		{
			for (var directory = new DirectoryInfo(AppContext.BaseDirectory); directory is not null; directory = directory.Parent)
			{
				if (File.Exists(Path.Combine(directory.FullName, "global.json")))
				{
					return directory.FullName;
				}
			}

			throw new InvalidOperationException("Could not locate the repository root containing global.json.");
		}
	}

	private static string NuGetFeedPath { get; } = Path.Combine(RepositoryPath, "artifacts", "package", "release");

	[Test]
	[Arguments("Geekeey.Arcade.NET.Sdk", "base")]
	[Arguments("Geekeey.Arcade.NET.Sdk.Razor", "razor")]
	[Arguments("Geekeey.Arcade.NET.Sdk.Web", "web")]
	public async Task SdkPackageCanBeConsumedFromAFeed(string packageId, string name)
	{
		// Arrange
		var version = FindPackageVersion(packageId);
		using var sut = await SdkTestProject.CreateAsync(name, version);

		// Act
		await sut.RunDotnetAsync($"restore --configfile \"{sut.NuGetConfigPath}\" --packages \"{sut.PackagesPath}\" --nologo");
		await sut.RunDotnetAsync("build --no-restore --nologo");
		await sut.RunDotnetAsync($"pack --no-restore --configuration Debug --output \"{sut.PackedPath}\" --nologo");

		// Assert
		await Assert.That(File.Exists(Path.Combine(sut.ProjectPath, "bin", "Debug", "net10.0", $"{sut.ProjectName}.dll"))).IsTrue();
		await Assert.That(Directory.Exists(sut.PackedPath)).IsTrue();
		await Assert.That(Directory.EnumerateFiles(sut.PackedPath, $"{sut.ProjectName}.*.nupkg").Any()).IsTrue();
	}

	[Test]
	public async Task TestSdkPackageStoresTestOutputInArtifacts()
	{
		// Arrange
		var version = FindPackageVersion("Geekeey.Arcade.NET.Sdk.Test");
		using var sut = await SdkTestProject.CreateAsync("test", version);
		await sut.RunDotnetAsync($"restore --configfile \"{sut.NuGetConfigPath}\" --packages \"{sut.PackagesPath}\" --nologo");
		await sut.RunDotnetAsync("build --no-restore --nologo");

		var outputDirectory = Path.Combine(sut.ProjectPath, "artifacts", "bin", sut.ProjectName, "debug");
		await Assert.That(File.Exists(Path.Combine(outputDirectory, $"{sut.ProjectName}.dll"))).IsTrue();

		// Act
		var stdout = await sut.RunDotnetAsync("run --no-build --no-restore");

		// Assert
		await Assert.That(stdout.Contains("succeeded: 1", StringComparison.Ordinal)).IsTrue();
	}

	private static string FindPackageVersion(string packageId)
	{
		var pattern = $"""^{Regex.Escape(packageId)}\.(?<version>\d+\.\d+\.\d+(?:[-+][0-9A-Za-z.-]+)?)\.nupkg$""";
		foreach (var package in Directory.EnumerateFiles(NuGetFeedPath, "*.nupkg"))
		{
			var match = Regex.Match(Path.GetFileName(package), pattern, RegexOptions.CultureInvariant);
			if (match.Success)
			{
				return match.Groups["version"].Value;
			}
		}

		throw new InvalidOperationException($"No current package found for {packageId}. Run dotnet pack first.");
	}

	private sealed class SdkTestProject : IDisposable
	{
		private SdkTestProject(string root)
		{
			RootPath = root;
			ProjectPath = Path.Combine(RootPath, "Project");
			PackagesPath = Path.Combine(RootPath, "packages");
			PackedPath = Path.Combine(RootPath, "packed");
			NuGetConfigPath = Path.Combine(RootPath, "NuGet.config");
		}

		public static async Task<SdkTestProject> CreateAsync(string name, string version)
		{
			var sut = new SdkTestProject(Path.Combine(Path.GetTempPath(), $"arcade-sdk-test-{Guid.NewGuid():N}"));
			try
			{
				Directory.CreateDirectory(sut.ProjectPath);
				Directory.Copy(Path.Combine(AppContext.BaseDirectory, "fixtures", name), sut.ProjectPath);
				sut.ProjectFilePath = Directory.EnumerateFiles(sut.ProjectPath, "*.csproj").Single();
				sut.ProjectName = Path.GetFileNameWithoutExtension(sut.ProjectFilePath);
				var project = await File.ReadAllTextAsync(sut.ProjectFilePath);
				await File.WriteAllTextAsync(sut.ProjectFilePath, project.Replace("{0}", version, StringComparison.Ordinal));
				var contents = $"""
				                <configuration>
				                	<packageSources>
				                		<clear />
				                		<add key="local" value="{Path.Combine(RepositoryPath, "artifacts", "package", "release")}" />
				                		<add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
				                	</packageSources>
				                </configuration>
				                """;
				await File.WriteAllTextAsync(sut.NuGetConfigPath, contents);
				return sut;
			}
			catch
			{
				sut.Dispose();
				throw;
			}
		}

		public string RootPath { get; }

		public string ProjectPath { get; }

		public string ProjectFilePath { get; private set; } = "";

		public string ProjectName { get; private set; } = "";

		public string PackagesPath { get; }

		public string PackedPath { get; }

		public string NuGetConfigPath { get; }

		public async Task<string> RunDotnetAsync(string arguments)
		{
			var startInfo = new ProcessStartInfo("dotnet", arguments)
			{
				WorkingDirectory = ProjectPath,
				RedirectStandardOutput = true,
				RedirectStandardError = true,
				UseShellExecute = false,
				CreateNoWindow = true,
				Environment = { ["NUGET_PACKAGES"] = PackagesPath, ["DOTNET_CLI_DO_NOT_USE_MSBUILD_SERVER"] = "1" }
			};
			var process = Process.Start(startInfo) ?? throw new InvalidOperationException("Could not start dotnet.");
			var output = await process.StandardOutput.ReadToEndAsync();
			var error = await process.StandardError.ReadToEndAsync();
			await process.WaitForExitAsync();
			return process.ExitCode is 0 ? output : throw new InvalidOperationException($"dotnet {arguments} failed with exit code {process.ExitCode}.\n{output}\n{error}");
		}

		public void Dispose()
		{
			Directory.Delete(RootPath, recursive: true);
		}
	}
}