#!/usr/bin/env swift
// Generiert ein 1024×1024-AppIcon-PNG als Platzhalter für Zitare.
//
// Design (paper-Variant aus @mana/themes):
//   - Background: warm Sienna (paper-primary, HSL 18 50% 38%)
//   - Zwei stilisierte typografische Anführungszeichen oben in
//     gebrochenem Weiß (paper-background)
//   - Großes serifenbetontes „Z" zentriert in dunklem Sepia
//
// 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
// designter Icon ersetzen.

import AppKit
import CoreGraphics

let size = 1024
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(18, 50%, 38%) — paper-primary, warm Sienna
let background = CGColor(red: 0.57, green: 0.30, blue: 0.19, alpha: 1)
ctx.setFillColor(background)
ctx.fill(CGRect(x: 0, y: 0, width: size, height: size))

// Zwei „Anführungs"-Akzente oben — gebrochenes Weiß (paper-bg-light)
let accent = CGColor(red: 0.95, green: 0.93, blue: 0.88, alpha: 0.92)
let quoteFont = NSFont(name: "Georgia-Bold", size: 360)
    ?? NSFont.boldSystemFont(ofSize: 360)
let quoteAttrs: [NSAttributedString.Key: Any] = [
    .font: quoteFont,
    .foregroundColor: NSColor(cgColor: accent) ?? .white,
]

// Anführungszeichen links („)
let leftQuote = NSAttributedString(string: "\u{201E}", attributes: quoteAttrs)
let leftLine = CTLineCreateWithAttributedString(leftQuote)
ctx.textPosition = CGPoint(x: 160, y: 520)
CTLineDraw(leftLine, ctx)

// Anführungszeichen rechts (")
let rightQuote = NSAttributedString(string: "\u{201C}", attributes: quoteAttrs)
let rightLine = CTLineCreateWithAttributedString(rightQuote)
ctx.textPosition = CGPoint(x: 620, y: 520)
CTLineDraw(rightLine, ctx)

// Großes „Z" mittig — dunkles Sepia, serif
let zFont = NSFont(name: "Georgia-Bold", size: 640)
    ?? NSFont.boldSystemFont(ofSize: 640)
let darkSepia = CGColor(red: 0.22, green: 0.16, blue: 0.12, alpha: 1)
let zAttrs: [NSAttributedString.Key: Any] = [
    .font: zFont,
    .foregroundColor: NSColor(cgColor: darkSepia) ?? .black,
]
let zStr = NSAttributedString(string: "Z", attributes: zAttrs)
let zLine = CTLineCreateWithAttributedString(zStr)
let zBounds = CTLineGetImageBounds(zLine, ctx)
let tx = (CGFloat(size) - zBounds.width) / 2 - zBounds.origin.x
let ty = (CGFloat(size) - zBounds.height) / 2 - zBounds.origin.y - 40
ctx.textPosition = CGPoint(x: tx, y: ty)
CTLineDraw(zLine, 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)")