Swiftgram/Swiftgram/Playground/Sources/SwiftUIViewController.swift

import AsyncDisplayKit
import Display
import Foundation
import LegacyUI
import SGSwiftUI
import SwiftUI
import TelegramPresentationData
import UIKit

struct MySwiftUIView: View {
    weak var wrapperController: LegacyController?

    var num: Int64

    var body: some View {
        ScrollView {
            Text("Hello, World!")
                .font(.title)
                .foregroundColor(.black)
            
            Spacer(minLength: 0)
            
            Button("Push") {
                self.wrapperController?.push(mySwiftUIViewController(num + 1))
            }.buttonStyle(AppleButtonStyle())
            Spacer()
            Button("Modal") {
                self.wrapperController?.present(
                    mySwiftUIViewController(num + 1),
                    in: .window(.root),
                    with: ViewControllerPresentationArguments(presentationAnimation: .modalSheet)
                )
            }.buttonStyle(AppleButtonStyle())
            Spacer()
            if num > 0 {
                Button("Dismiss") {
                    self.wrapperController?.dismiss()
                }.buttonStyle(AppleButtonStyle())
                Spacer()
            }
            ForEach(1..<20, id: \.self) { i in
                Button("TAP: \(i)") {
                    print("Tapped \(i)")
                }.buttonStyle(AppleButtonStyle())
            }
            
        }
        .background(Color.green)
    }
}

struct AppleButtonStyle: ButtonStyle {
    func makeBody(configuration: Configuration) -> some View {
        configuration.label
            .font(.headline)
            .foregroundColor(.white)
            .padding()
            .frame(minWidth: 0, maxWidth: .infinity)
            .background(Color.blue)
            .cornerRadius(10)
            .scaleEffect(configuration.isPressed ? 0.95 : 1)
            .opacity(configuration.isPressed ? 0.9 : 1)
    }
}

public func mySwiftUIViewController(_ num: Int64) -> ViewController {
    let legacyController = LegacySwiftUIController(
        presentation: .modal(animateIn: true),
        theme: defaultPresentationTheme,
        strings: defaultPresentationStrings
    )
    legacyController.statusBar.statusBarStyle = defaultPresentationTheme.rootController
        .statusBarStyle.style
    legacyController.title = "Controller: \(num)"

    let swiftUIView = SGSwiftUIView<MySwiftUIView>(
        navigationBarHeight: legacyController.navigationBarHeightModel,
        containerViewLayout: legacyController.containerViewLayoutModel,
        content: { MySwiftUIView(wrapperController: legacyController, num: num) }
    )
    let controller = UIHostingController(rootView: swiftUIView, ignoreSafeArea: true)
    legacyController.bind(controller: controller)

    return legacyController
}