using System.Diagnostics;
using Microsoft.Extensions.Logging;

namespace PLib.Desktop.Services;

/// <summary>Hands a file over to whatever the operating system uses to open or show it.</summary>
public interface ISystemShell
{
    void OpenFile(string path);

    void RevealInFileManager(string path);
}

/// <inheritdoc cref="ISystemShell"/>
public sealed class SystemShell(ILogger<SystemShell> logger) : ISystemShell
{
    public void OpenFile(string path) => Start(new ProcessStartInfo(path) { UseShellExecute = true }, path);

    public void RevealInFileManager(string path)
    {
        ProcessStartInfo startInfo;

        if (OperatingSystem.IsWindows())
        {
            startInfo = new ProcessStartInfo("explorer.exe", $"/select,\"{path}\"");
        }
        else if (OperatingSystem.IsMacOS())
        {
            startInfo = new ProcessStartInfo("open", ["-R", path]);
        }
        else
        {
            var folder = Path.GetDirectoryName(path);

            if (folder is null)
            {
                return;
            }

            startInfo = new ProcessStartInfo("xdg-open", [folder]);
        }

        Start(startInfo, path);
    }

    private void Start(ProcessStartInfo startInfo, string path)
    {
        try
        {
            using var process = Process.Start(startInfo);
        }
        catch (Exception ex)
        {
            // Nothing actionable for the user here; a missing handler is not a crash.
            logger.LogWarning(ex, "Could not hand {Path} to the shell", path);
        }
    }
}