//
/*
 * Copyright (c) 2023 BWI GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import SwiftUI
import Foundation

/// Helper  class for making our SwiftUI view available to ObjectiveC
@objcMembers class TableViewCellWithLabelSubLabelAndSwitch<Content: View>: MXKTableViewCell {
    private var parentViewController: UIViewController?
    private let hostingController = UIHostingController<Content?>(rootView: nil)
    
    private var theme: Theme!
    
    override init!(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public func setupView(parent: UIViewController, rootView: Content) {
        self.parentViewController = parent
        hostingController.rootView = rootView
        
        let shouldControllerMove = hostingController.parent != parent
            if shouldControllerMove {
                removeController()
                parent.addChild(hostingController)
            }
        
        if !self.contentView.subviews.contains(hostingController.view) {
            self.contentView.addSubview(hostingController.view)
            self.contentView.vc_addSubViewMatchingParentSafeArea(hostingController.view)
        }
        
        if shouldControllerMove {
            hostingController.didMove(toParent: parent)
        }
        
        registerThemeServiceDidChangeThemeNotification()
        update(theme: ThemeService.shared().theme)
    }
    
    private func registerThemeServiceDidChangeThemeNotification() {
        NotificationCenter.default.addObserver(self, selector: #selector(themeDidChange), name: .themeServiceDidChangeTheme, object: nil)
    }
    
    @objc private func themeDidChange() {
        update(theme: ThemeService.shared().theme)
    }
    
    private func update(theme: Theme) {
        self.theme = theme
        
        hostingController.view.backgroundColor = theme.headerBackgroundColor
    }
    
    deinit {
        removeController()
    }
    
    private func removeController() {
        hostingController.willMove(toParent: nil)
        hostingController.view.removeFromSuperview()
        hostingController.removeFromParent()
        parentViewController = nil
    }
}

struct TableViewCellWithLabelSubLabelAndSwitchView: View {
    @ObservedObject var viewModel: EnterNewRoomDetailsViewModel
    var toggleText: String
    var subText: String
    @Environment(\.theme) private var theme
    
    var onValueChanged: ((_: Bool) -> Void)?

    var body: some View {
        VStack(alignment: .leading) {
            HStack {
                Toggle(isOn: $viewModel.serverACLToggleValue) {
                    Text(toggleText)
                        .lineLimit(nil)
                }
                    .toggleStyle(SwitchToggleStyle(tint: Color(ThemeService.shared().theme.tintColor)))
                    .onChange(of: viewModel.serverACLToggleValue) { newToggleValue in
                        onValueChanged?(newToggleValue)
                    }
            }
            Text(subText)
                .font(.system(size: 15))
                .foregroundColor(theme.colors.secondaryContent)
                .lineLimit(nil)
        }
        .padding([.leading, .trailing], 16)
        .padding([.top, .bottom], 8)
    }
}