//
//  SidebarView.swift
//  NetNewsWire
//
//  Created by Maurice Parker on 6/29/20.
//  Copyright © 2020 Ranchero Software. All rights reserved.
//

import SwiftUI
import Account

struct SidebarView: View {
	
	// I had to comment out SceneStorage because it blows up if used on macOS
	//	@SceneStorage("expandedContainers") private var expandedContainerData = Data()
	@StateObject private var expandedContainers = SidebarExpandedContainers()
	@EnvironmentObject private var sidebarModel: SidebarModel
	
	@ViewBuilder
	var body: some View {
		#if os(macOS)
		List(selection: $sidebarModel.selectedSidebarItems) {
			containedList
		}
		#else
		List {
			containedList
		}
		#endif
		//		.onAppear {
		//			expandedContainers.data = expandedContainerData
		//		}
		//		.onReceive(expandedContainers.objectDidChange) {
		//			expandedContainerData = expandedContainers.data
		//		}
	}
	
	var containedList: some View {
		ForEach(sidebarModel.sidebarItems) { sidebarItem in
			if let containerID = sidebarItem.containerID {
				DisclosureGroup(isExpanded: $expandedContainers[containerID]) {
					ForEach(sidebarItem.children) { sidebarItem in
						if let containerID = sidebarItem.containerID {
							DisclosureGroup(isExpanded: $expandedContainers[containerID]) {
								ForEach(sidebarItem.children) { sidebarItem in
									ZStack {
										SidebarItemView(sidebarItem: sidebarItem)
										NavigationLink(destination: (TimelineContainerView(feed: sidebarItem.feed)),
													   tag: sidebarItem.feed!.feedID!,
													   selection: $sidebarModel.selectedSidebarItem) {
											EmptyView()
										}.buttonStyle(PlainButtonStyle())
									}
								}
							} label: {
								ZStack {
									SidebarItemView(sidebarItem: sidebarItem)
									NavigationLink(destination: (TimelineContainerView(feed: sidebarItem.feed)),
												   tag: sidebarItem.feed!.feedID!,
												   selection: $sidebarModel.selectedSidebarItem) {
										EmptyView()
									}.buttonStyle(PlainButtonStyle())
								}
							}
						} else {
							ZStack {
								SidebarItemView(sidebarItem: sidebarItem)
								NavigationLink(destination: (TimelineContainerView(feed: sidebarItem.feed)),
											   tag: sidebarItem.feed!.feedID!,
											   selection: $sidebarModel.selectedSidebarItem) {
									EmptyView()
								}.buttonStyle(PlainButtonStyle())
							}
						}
					}
				} label: {
					SidebarItemView(sidebarItem: sidebarItem)
				}
			}
		}
	}
	
}