From 819b838c1b58009e8e68c4d514adc3312c5e5bcf Mon Sep 17 00:00:00 2001
From: Angel Wang <angel@angelcube.dev>
Date: Mon, 22 Jun 2026 20:56:59 -0600
Subject: [PATCH] feat: set windows wallpaper?

untested!!
---
 src/apply/index.ts | 34 +++++++++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

diff --git a/src/apply/index.ts b/src/apply/index.ts
index 3730b54..76bdf4c 100644
--- a/src/apply/index.ts
+++ b/src/apply/index.ts
@@ -48,7 +48,7 @@ console.info(`Current sun altitude is ${currentSunData.altitude}°!`)
 const hueValue = Number(currentSunData.altitude) >= -0.833
 	? mapEaseOutQuint(Number(currentSunData.altitude), -0.833, zenithSunData.altitude, 0, 264)
 	: mapEaseOutQuint(Number(currentSunData.altitude), nadirSunData.altitude, -0.833, 264, 360)
-	
+
 const chromaValue = map(
 	100 - Number(openMeteoData.cloudCover), // gotta invert this one
 	0,
@@ -76,8 +76,36 @@ console.debug(chalkDebug(`Opened cache file ${pathToCache}!`))
 
 const targetImages = findMatchingImages(imagesData, hueValue, chromaValue, lightnessValue)
 const targetImage = targetImages[Math.floor(Math.random() * targetImages.length)]
-console.info(`Found target image ${targetImage.path} with colour oklch(${targetImage.oklch[0]} ${targetImage.oklch[1]} ${targetImage.oklch[2]})!`)
+console.info(
+	`Found target image ${targetImage.path} with colour oklch(${targetImage.oklch[0]} ${targetImage.oklch[1]} ${
+		targetImage.oklch[2]
+	})!`,
+)
 
 console.info(`Setting wallpaper...`)
-await $`eval ${config.applyWallpaperCommand.replace("%s", targetImage.path)}`
+
+if (Deno.build.os != "windows") {
+	await $`eval ${config.applyWallpaperCommand.replace("%s", targetImage.path)}`
+} else {
+	// C# in TypeScript. who would've thought
+	const command = `
+		$code = @' 
+		using System.Runtime.InteropServices; 
+			namespace Win32 { 
+				public class Wallpaper { 
+					[DllImport("user32.dll", CharSet=CharSet.Auto)] 
+					static extern int SystemParametersInfo (int uAction, int uParam, string lpvParam, int fuWinIni);
+					
+					public static void SetWallpaper(string imagePath){ 
+						SystemParametersInfo(20, 0, imagePath, 3); 
+					}
+				}
+			}
+		'@
+
+		add-type $code 
+		[Win32.Wallpaper]::SetWallpaper(${targetImage.path})
+	`
+	await $`pwsh ${command}`
+}
 console.info(`Success! Enjoy :)`)
-- 
2.51.2