using System;
using System.Drawing;

// The 'windowHandle' parameter will contain the window handle for the:
//   - Active window when run by hotkey
//   - Window Location target when run by a Window Location rule
//   - TitleBar Button owner when run by a TitleBar Button
//   - Jump List owner when run from a Taskbar Jump List
//   - Currently focused window if none of these match
public static class DisplayFusionFunction
{
public static void Run(IntPtr windowHandle)
{
//replace these variables with ones that will work on your system
string defaultProfile = "Standard Profile";
string bigPictureProfile = "Big Screen Gaming Profile";
string steamDirectory = @"C:\\Program Files (x86)\\Steam\\Steam.exe";
const int waitForever = 0;

// get current profile name
string currentProfileName = BFS.DisplayFusion.GetCurrentMonitorProfile();
if(currentProfileName == "randomspam")
currentProfileName = defaultProfile;

// close Steam if it is running
uint steamID;
bool wasSteamRunning = BFS.Application.IsAppRunningByFile(steamDirectory);
if(wasSteamRunning)
{
steamID = BFS.Application.GetAppIDByFile(steamDirectory);
BFS.Application.Kill(steamID);

// wait for Steam to exit
BFS.Application.WaitForExitByAppID(steamID, waitForever);
}

// wake up the monitors
BFS.General.WakeMonitors();

// load the big picture monitor profile and wait for it to switch
BFS.DisplayFusion.LoadMonitorProfile(bigPictureProfile);
string profileName = BFS.DisplayFusion.GetCurrentMonitorProfile();
while(!profileName.Equals(bigPictureProfile, StringComparison.OrdinalIgnoreCase))
{
BFS.General.ThreadWait(100);
profileName = BFS.DisplayFusion.GetCurrentMonitorProfile();
}

// start Steam in Big Picture mode
steamID = BFS.Application.Start(steamDirectory, "-bigpicture");

// wait for Steam to exit
BFS.Application.WaitForExitByAppID(steamID, waitForever);

// restart Steam in normal mode
if(wasSteamRunning)
BFS.Application.Start(steamDirectory, "");

// wake up the monitors
BFS.General.WakeMonitors();

// load the last running monitor profile and wait for it to switch
BFS.DisplayFusion.LoadMonitorProfile(currentProfileName);
}
}