AppIconPreview.swift

//
//  AppIconView.swift
//  This view represents a customizable app icon using SwiftUI.
//
//  To replace `AppIconView` with your own design:
//  - Modify the contents of the `body` to implement your desired app icon layout.
//  - You can use any combination of shapes, colors, images, and text.
//  - Preview the icon using `AppIconPreview` and save it when you're satisfied.
//

import SwiftUI

struct AppIconView: View {
    var body: some View {
        ZStack {
            Color.white
                .edgesIgnoringSafeArea(.all)
            
            Circle()
                .frame(width: 750, height: 750)
                .shadow(radius: 10)
            
            Image(systemName: "shield.lefthalf.fill")
                .resizable()
                .foregroundColor(.white)
                .frame(width: 300, height: 300)
                .shadow(radius: 5)
        }
    }
}

struct AppIconPreview<Content: View>: View {
    let appIconView: Content
    let appIconPath: String
    
    var body: some View {
        appIconView
            .frame(width: 1024, height: 1024)               // Render at actual AppIcon size
            .overlay(                                       // Add rounded corners
                RoundedRectangle(cornerRadius: 180)
                    .stroke(Color.gray, lineWidth: 1)
            )
            .scaleEffect(0.25)                              // Scale back down to fit in Preview
            .frame(width: 256, height: 256)                 // Crop frame back to new size
            .padding(.bottom)
        
        Button("Save") {
            render()
        }
    }
    
    @MainActor func render() {
        let fileURL = URL(fileURLWithPath: appIconPath)
        let imageRenderer = ImageRenderer(content: appIconView.frame(width: 1024, height: 1024))
        
        if let uiImage = imageRenderer.uiImage,
           let pngData = uiImage.pngData() {
            do {
                try pngData.write(to: fileURL)
                print("Image saved to \(fileURL)")
            } catch {
                print("Error saving image: \(error)")
            }
        } else {
            print("Rendering error")
        }
    }
}

#Preview {
    AppIconPreview(
        appIconView: AppIconView(),
        appIconPath: "/icon.png"
    )
}