using System;
using System.Drawing;

// This script is based on Keith Lammers' original script.BFS.
// This script will toggle spanning a custom group of horizontally arranged monitors.
// Specify the monitor IDs from left-to-right in the monitorsToSpan array on line 14.
// Each time the script runs, it spans the window across the specified monitors.

public static class DisplayFusionFunction
{
    public static void Run(IntPtr windowHandle)
    {
        // Specify the monitors you want to span here
        // Ensure the monitor IDs are entered from left-to-right.
        uint[] monitorsToSpan = { 2, 3 };

        // Calculate the total size of the spanned window
        // Initialize with the first monitor's work area.
        Rectangle leftMonitorWorkArea = BFS.Monitor.GetMonitorWorkAreaByID(monitorsToSpan[0]);
        int windowWidth = 0; // Total width of all monitors in the span
        int windowHeight = leftMonitorWorkArea.Height; // Height will be the smallest height among the monitors

        // Iterate through each specified monitor to sum up the widths and find the smallest height
        foreach (uint monitorID in monitorsToSpan)
        {
            Rectangle monitorWorkArea = BFS.Monitor.GetMonitorWorkAreaByID(monitorID);
            windowWidth += monitorWorkArea.Width; // Add the monitor's width to the total
            if (monitorWorkArea.Height < windowHeight)
            {
                windowHeight = monitorWorkArea.Height; // Update to the smallest height encountered
            }
        }

        // Determine the top-left corner position of the spanned window
        int windowLocationX = leftMonitorWorkArea.X;
        int windowLocationY = leftMonitorWorkArea.Y;

        // Define the calculated size and position for the spanned window
        Rectangle calculatedSize = new Rectangle(windowLocationX, windowLocationY, windowWidth, windowHeight);

        // Always span the window to the calculated size
        BFS.Window.SetSizeAndLocation(windowHandle, calculatedSize.X, calculatedSize.Y, calculatedSize.Width, calculatedSize.Height);
    }
}