//
//  RedSpheresImmersiveView.swift
//  TestFlickeringBetweenImmersiveSpaces
//

import SwiftUI
import RealityKit
import RealityKitContent

struct RedSpheresImmersiveView: View {
    @Environment(AppModel.self) var appModel
    var body: some View {
        RealityView { content, attachments in
            // Add the initial RealityKit content
            if let immersiveContentEntity = try? await Entity(named: "RedSpheres", in: realityKitContentBundle) {
                immersiveContentEntity.position = [0.0, 0.1, -2.5]
                content.add(immersiveContentEntity)

                guard let showYellowSpheresButton = attachments.entity(for: "ShowYellowSpheres") else {
                    assertionFailure("missing attachment")
                    return
                }
                showYellowSpheresButton.position = [0.0, 1, -2.5]
                showYellowSpheresButton.scale = scaleForAttachements
                content.add(showYellowSpheresButton)

            }
        } update: { content, attachments in
            
        } placeholder: {
            
            ProgressView()
            
        } attachments: {
            
            Attachment(id: "ShowYellowSpheres") {
                Button {
                    // dismissCurrnt and open next immersive space
                    appModel.immersiveSpaceID = "YellowSpheres"
                } label: {
                    Text("Show YellowSpheres")
                }
            }
        }
    }

}

#Preview(immersionStyle: .mixed) {
    RedSpheresImmersiveView()
        .environment(AppModel())
}