# 1. Define the image URL and save location
$url = "https://cdn.xorydev.xyz/currently_selected_assets/wallpaper.png"
$wallpaperPath = "C:\Users\Public\Pictures\wallpaper.png"

# Ensure the destination directory exists
$wallpaperDir = Split-Path -Path $wallpaperPath -Parent
if (-not (Test-Path -Path $wallpaperDir)) {
    New-Item -ItemType Directory -Path $wallpaperDir -Force
}

# 2. Download the image
try {
    Invoke-WebRequest -Uri $url -OutFile $wallpaperPath -UseBasicParsing -ErrorAction Stop
}
catch {
    Write-Error "Failed to download the wallpaper. Please check the URL and your internet connection."
    # Exit the script if the download fails
    return
}


# 3. Update registry to point to the new wallpaper
Set-ItemProperty -Path "HKCU:\Control Panel\Desktop" -Name Wallpaper -Value $wallpaperPath

# 4. Define the C# code to call the native Windows API
$CSharpCode = @"
using System.Runtime.InteropServices;

public class WallpaperChanger {
    // Import the SystemParametersInfo function from user32.dll
    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    public static extern int SystemParametersInfo(int uAction, int uParam, string lpvParam, int fuWinIni);
}
"@

# 5. Compile the C# code in memory
Add-Type -TypeDefinition $CSharpCode

# 6. Define constants needed for the API call
$SPI_SETDESKWALLPAPER = 0x0014
$SPIF_UPDATEINIFILE = 0x01
$SPIF_SENDCHANGE = 0x02

# 7. Call the compiled function to apply the wallpaper change immediately
[WallpaperChanger]::SystemParametersInfo($SPI_SETDESKWALLPAPER, 0, $wallpaperPath, ($SPIF_UPDATEINIFILE -bor $SPIF_SENDCHANGE))