using System.ComponentModel;
using System.Diagnostics;
using CursorLang.Core.Services;

namespace CursorLang.Agent.Services;

/// <summary>
/// Starts the settings window.
/// </summary>
/// <remarks>
/// The agent does not keep track of whether the window is already open, and does not
/// need to: the settings process guards a single-instance slot of its own, so a second
/// launch raises the window already there and exits. That costs a process start to find
/// out, which is a fraction of the time it takes a person to look at the tray, and it
/// saves the agent from holding a handle to something it does not own.
/// </remarks>
internal static class SettingsLauncher
{
    /// <summary>
    /// Opens the settings window. Returns <c>false</c> when the executable is not
    /// where it should be — a half-copied installation, or the agent run from a build
    /// folder of its own.
    /// </summary>
    internal static bool Open()
    {
        if (AgentExecutable.SettingsPath is not { } path)
        {
            return false;
        }

        try
        {
            using Process? started = Process.Start(new ProcessStartInfo(path) { UseShellExecute = false });
            return started is not null;
        }
        catch (Exception e) when (e is Win32Exception or InvalidOperationException)
        {
            // Nothing to tell the user with: the agent has no window of its own, and
            // the one that would have shown the message is the one that failed to start
            return false;
        }
    }
}