import AppKit

// Before macOS 26 the system draws the supplied silhouette as it is; unlike iOS
// it does not mask an opaque master. Derive the Mac's rounded tile on Apple's
// 824-on-1024 grid from the full-bleed square master, the iPhone's. Not from
// Resources/AppIcon.png: that one is already rounded onto the grid, and
// drawing it into the grid again left the artwork at 664 of 1024, small in the
// Dock beside every other app. macOS 26 and later use Assets.car instead
// (bundle-mac.py), where the system applies the mask.
let native = URL(fileURLWithPath: #filePath).standardizedFileURL
  .deletingLastPathComponent().deletingLastPathComponent()
let resources = native.appendingPathComponent("apple/Sources/CallsMac/Resources")
let master = native.appendingPathComponent("ios/Assets.xcassets/AppIcon.appiconset/AppIcon.png")
guard let source = NSImage(contentsOf: master),
  let bitmap = NSBitmapImageRep(bitmapDataPlanes: nil, pixelsWide: 1024, pixelsHigh: 1024,
    bitsPerSample: 8, samplesPerPixel: 4, hasAlpha: true, isPlanar: false,
    colorSpaceName: .deviceRGB, bytesPerRow: 0, bitsPerPixel: 0),
  let context = NSGraphicsContext(bitmapImageRep: bitmap)
else { fatalError("Cannot load or render Calls's icon") }
NSGraphicsContext.saveGraphicsState()
NSGraphicsContext.current = context
context.imageInterpolation = .high
let tile = NSRect(x: 100, y: 100, width: 824, height: 824)
NSBezierPath(roundedRect: tile, xRadius: 184, yRadius: 184).addClip()
source.draw(in: tile, from: .zero, operation: .copy, fraction: 1)
NSGraphicsContext.restoreGraphicsState()
guard let png = bitmap.representation(using: .png, properties: [:]) else {
  fatalError("Cannot encode Calls's icon")
}
try png.write(to: resources.appendingPathComponent("MacIcon.png"))