#!/usr/bin/env swift
// Generiert ein 1024×1024-AppIcon-PNG als Platzhalter.
// forest-green Hintergrund + großes weißes "C" mit Karten-Stack-Andeutung.
//
// Aufruf:
//   swift scripts/make-appicon.swift
//
// Schreibt nach: Sources/Resources/Assets.xcassets/AppIcon.appiconset/AppIcon-1024.png
//
// Dies ist ein Platzhalter — vor App-Store-Submission durch ein
// professionelles Icon ersetzen (siehe docs/RELEASE_CHECKLIST.md).

import AppKit
import CoreGraphics

let size = 1024
let scale: CGFloat = 1.0
let cs = CGColorSpaceCreateDeviceRGB()
guard let ctx = CGContext(
    data: nil,
    width: size, height: size,
    bitsPerComponent: 8, bytesPerRow: 0,
    space: cs,
    bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue
) else {
    print("CGContext creation failed")
    exit(1)
}

// HSL(142, 76%, 28%) — forest primary light. Hand-konvertiert zu sRGB.
let background = CGColor(red: 0.043, green: 0.494, blue: 0.227, alpha: 1)
ctx.setFillColor(background)
ctx.fill(CGRect(x: 0, y: 0, width: size, height: size))

// Subtile Karten-Stack-Schatten hinter dem C
let shadow1 = CGColor(red: 1, green: 1, blue: 1, alpha: 0.08)
let shadow2 = CGColor(red: 1, green: 1, blue: 1, alpha: 0.05)
let cardW = CGFloat(size) * 0.62
let cardH = CGFloat(size) * 0.82
let cardX = (CGFloat(size) - cardW) / 2
let cardY = (CGFloat(size) - cardH) / 2

ctx.setFillColor(shadow2)
ctx.beginPath()
ctx.addPath(CGPath(roundedRect: CGRect(x: cardX + 30, y: cardY - 30, width: cardW, height: cardH),
                   cornerWidth: 48, cornerHeight: 48, transform: nil))
ctx.fillPath()

ctx.setFillColor(shadow1)
ctx.beginPath()
ctx.addPath(CGPath(roundedRect: CGRect(x: cardX + 15, y: cardY - 15, width: cardW, height: cardH),
                   cornerWidth: 48, cornerHeight: 48, transform: nil))
ctx.fillPath()

// Großer weißer "C"-Buchstabe — Helvetica-Neue-Bold
let attrs: [NSAttributedString.Key: Any] = [
    .font: NSFont(name: "HelveticaNeue-Bold", size: 720) ?? NSFont.boldSystemFont(ofSize: 720),
    .foregroundColor: NSColor.white,
]
let str = NSAttributedString(string: "C", attributes: attrs)
let line = CTLineCreateWithAttributedString(str)
let bounds = CTLineGetImageBounds(line, ctx)
let tx = (CGFloat(size) - bounds.width) / 2 - bounds.origin.x
let ty = (CGFloat(size) - bounds.height) / 2 - bounds.origin.y
ctx.textPosition = CGPoint(x: tx, y: ty)
CTLineDraw(line, ctx)

// PNG schreiben
guard let cgImage = ctx.makeImage() else {
    print("makeImage failed")
    exit(1)
}
let bitmap = NSBitmapImageRep(cgImage: cgImage)
guard let data = bitmap.representation(using: .png, properties: [:]) else {
    print("PNG encoding failed")
    exit(1)
}

let target = URL(fileURLWithPath: "Sources/Resources/Assets.xcassets/AppIcon.appiconset/AppIcon-1024.png")
try data.write(to: target)
print("Wrote \(target.path) (\(data.count) bytes)")
_ = scale // suppress unused warning