using System.Diagnostics;

namespace VoiceCat.Tests;

public class PublishServerScriptTests
{
    [Fact]
    public async Task DefaultPublishTargetsWindowsAndLinuxWhileRuntimeCanSelectOne()
    {
        string script = Path.Combine(FindRoot(), "scripts", "publish-server.ps1");

        string allTargets = await RunWhatIf(script);
        Assert.Contains("win-x64", allTargets);
        Assert.Contains("linux-x64", allTargets);

        string linuxOnly = await RunWhatIf(script, "-Runtime", "linux-x64");
        Assert.Contains("linux-x64", linuxOnly);
        Assert.DoesNotContain("win-x64", linuxOnly);
    }

    private static async Task<string> RunWhatIf(string script, params string[] arguments)
    {
        string powerShell = OperatingSystem.IsWindows() ? "powershell.exe" : "pwsh";
        var start = new ProcessStartInfo(powerShell)
        {
            UseShellExecute = false,
            CreateNoWindow = true,
            RedirectStandardOutput = true,
            RedirectStandardError = true,
        };
        foreach (string argument in new[] { "-NoProfile", "-NonInteractive", "-File", script, "-WhatIf" }.Concat(arguments))
            start.ArgumentList.Add(argument);

        using Process process = Process.Start(start) ?? throw new InvalidOperationException("Could not start PowerShell.");
        Task<string> stdout = process.StandardOutput.ReadToEndAsync();
        Task<string> stderr = process.StandardError.ReadToEndAsync();
        await process.WaitForExitAsync();
        string output = await stdout + await stderr;
        Assert.True(process.ExitCode == 0, output);
        return output;
    }

    private static string FindRoot()
    {
        DirectoryInfo? directory = new(AppContext.BaseDirectory);
        while (directory is not null && !File.Exists(Path.Combine(directory.FullName, "VoiceCat.slnx")))
            directory = directory.Parent;
        return directory?.FullName ?? throw new DirectoryNotFoundException("Repository root not found.");
    }
}