import SwiftUI
import StreamVideo
import StreamVideoSwiftUI
import Combine

class CallOverlayViewFactory: ViewFactory {
    // ... existing ViewFactory methods ...
    func makeVideoParticipantView(
        participant: CallParticipant,
        id: String,
        availableFrame: CGRect,
        contentMode: UIView.ContentMode,
        customData: [String: RawJSON],
        call: Call?
    ) -> some View {
        VideoCallParticipantView(
            viewFactory: self,
            participant: participant,
            id: id,
            availableFrame: availableFrame,
            contentMode: .scaleAspectFit,
            customData: customData,
            call: call
        )
    }

    func makeVideoCallParticipantModifier(
        participant: CallParticipant,
        call: Call?,
        availableFrame: CGRect,
        ratio: CGFloat,
        showAllInfo: Bool
    ) -> some ViewModifier {
        VideoCallParticipantModifier(
            participant: participant,
            call: call,
            availableFrame: availableFrame,
            ratio: ratio,
            showAllInfo: showAllInfo,
            decorations: [.speaking] // Here we only want the speaking decoration
        )
    }

    func makeLocalParticipantViewModifier(
        localParticipant: CallParticipant,
        callSettings: Binding<CallSettings>,
        call: Call?
    ) -> some ViewModifier {
        LocalParticipantViewModifier(
            localParticipant: localParticipant,
            call: call,
            callSettings: callSettings,
            showAllInfo: true,
            decorations: [.speaking] // Here we only need the speaking decoration
        )
    }
}

struct CallOverlayView: View {
    @ObservedObject var viewModel: CallViewModel
    // Healthy Homies (10/21): while the face tiles show, they draw the call
    // (CrewTiles/CrewStageView, in its own view under the page) and Stream's
    // stock view steps aside. Tiles off, this is the view as it always was.
    @ObservedObject var crew: CrewLayoutModel
    @State private var safeAreaInsets: EdgeInsets = .init()
    private let viewFactory: CallOverlayViewFactory

    init(viewModel: CallViewModel, crew: CrewLayoutModel) {
        self.viewModel = viewModel
        self.crew = crew
        self.viewFactory = CallOverlayViewFactory()
    }

    var body: some View {
        VStack(spacing: 0) {
            ZStack {
                if crew.showing {
                    Color.clear
                } else {
                    CustomCallView(viewFactory: viewFactory, viewModel: viewModel)
                }
            }
            .padding(.top, safeAreaInsets.top)
            .padding(.bottom, safeAreaInsets.bottom)
        }
        .edgesIgnoringSafeArea(.all)
        .overlay(
            GeometryReader { geometry in
                Color.clear
                    .preference(key: SafeAreaInsetsKey.self, value: geometry.safeAreaInsets)
            }
        )
        .onPreferenceChange(SafeAreaInsetsKey.self) { value in
            safeAreaInsets = value
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
    }

    private func changeTrackVisibility(_ participant: CallParticipant?, isVisible: Bool) {
        print("changeTrackVisibility for \(String(describing: participant?.userId)), visible: \(isVisible)")
        guard let participant = participant,
              let call = viewModel.call else { return }
        Task {
            await call.changeTrackVisibility(for: participant, isVisible: isVisible)
        }
    }
}

extension CallOverlayView {
    static func create(callViewModel: CallViewModel, crew: CrewLayoutModel) -> UIHostingController<CallOverlayView> {
        let view = CallOverlayView(viewModel: callViewModel, crew: crew)
        let hostingController = UIHostingController(rootView: view)
        hostingController.view.backgroundColor = .clear

        // Make sure we respect safe areas
        hostingController.view.insetsLayoutMarginsFromSafeArea = true

        return (hostingController)
    }
}

struct SafeAreaInsetsKey: PreferenceKey {
    static var defaultValue: EdgeInsets = .init()
    static func reduce(value: inout EdgeInsets, nextValue: () -> EdgeInsets) {
        value = nextValue()
    }
}