import Foundation
import UIKit
import Display
import LegacyComponents
import TelegramCore
import SyncCore
import Postbox
import SwiftSignalKit
import MergeLists
import ItemListUI
import ItemListVenueItem
import TelegramPresentationData
import TelegramStringFormatting
import TelegramUIPreferences
import TelegramNotices
import AccountContext
import AppBundle
import CoreLocation
import Geocoding
import DeviceAccess
import TooltipUI

func getLocation(from message: Message) -> TelegramMediaMap? {
    return message.media.first(where: { $0 is TelegramMediaMap } ) as? TelegramMediaMap
}

private func areMessagesEqual(_ lhsMessage: Message, _ rhsMessage: Message) -> Bool {
    if lhsMessage.stableVersion != rhsMessage.stableVersion {
        return false
    }
    if lhsMessage.id != rhsMessage.id || lhsMessage.flags != rhsMessage.flags {
        return false
    }
    return true
}

private struct LocationViewTransaction {
    let deletions: [ListViewDeleteItem]
    let insertions: [ListViewInsertItem]
    let updates: [ListViewUpdateItem]
}

private enum LocationViewEntryId: Hashable {
    case info
    case toggleLiveLocation
    case liveLocation(UInt32)
}

private enum LocationViewEntry: Comparable, Identifiable {
    case info(PresentationTheme, TelegramMediaMap, String?, Double?, Double?)
    case toggleLiveLocation(PresentationTheme, String, String, CLLocationCoordinate2D?, Double?, Double?)
    case liveLocation(PresentationTheme, PresentationDateTimeFormat, PresentationPersonNameOrder, Message, Double?, Int)
    
    var stableId: LocationViewEntryId {
        switch self {
            case .info:
                return .info
            case .toggleLiveLocation:
                return .toggleLiveLocation
            case let .liveLocation(_, _, _, message, _, _):
                return .liveLocation(message.stableId)
        }
    }
    
    static func ==(lhs: LocationViewEntry, rhs: LocationViewEntry) -> Bool {
        switch lhs {
            case let .info(lhsTheme, lhsLocation, lhsAddress, lhsDistance, lhsTime):
                if case let .info(rhsTheme, rhsLocation, rhsAddress, rhsDistance, rhsTime) = rhs, lhsTheme === rhsTheme, lhsLocation.venue?.id == rhsLocation.venue?.id, lhsAddress == rhsAddress, lhsDistance == rhsDistance, lhsTime == rhsTime {
                    return true
                } else {
                    return false
                }
            case let .toggleLiveLocation(lhsTheme, lhsTitle, lhsSubtitle, lhsCoordinate, lhsBeginTimestamp, lhsTimeout):
                if case let .toggleLiveLocation(rhsTheme, rhsTitle, rhsSubtitle, rhsCoordinate, rhsBeginTimestamp, rhsTimeout) = rhs, lhsTheme === rhsTheme, lhsTitle == rhsTitle, lhsSubtitle == rhsSubtitle, lhsCoordinate == rhsCoordinate, lhsBeginTimestamp == rhsBeginTimestamp, lhsTimeout == rhsTimeout {
                    return true
                } else {
                    return false
                }
            case let .liveLocation(lhsTheme, lhsDateTimeFormat, lhsNameDisplayOrder, lhsMessage, lhsDistance, lhsIndex):
                if case let .liveLocation(rhsTheme, rhsDateTimeFormat, rhsNameDisplayOrder, rhsMessage, rhsDistance, rhsIndex) = rhs, lhsTheme === rhsTheme, lhsDateTimeFormat == rhsDateTimeFormat, lhsNameDisplayOrder == rhsNameDisplayOrder, areMessagesEqual(lhsMessage, rhsMessage), lhsDistance == rhsDistance, lhsIndex == rhsIndex {
                    return true
                } else {
                    return false
                }
        }
    }
    
    static func <(lhs: LocationViewEntry, rhs: LocationViewEntry) -> Bool {
        switch lhs {
            case .info:
                switch rhs {
                    case .info:
                        return false
                    case .toggleLiveLocation, .liveLocation:
                        return true
                }
            case .toggleLiveLocation:
                switch rhs {
                    case .info, .toggleLiveLocation:
                        return false
                    case .liveLocation:
                        return true
            }
            case let .liveLocation(_, _, _, _, _, lhsIndex):
                switch rhs {
                    case .info, .toggleLiveLocation:
                        return false
                    case let .liveLocation(_, _, _, _, _, rhsIndex):
                        return lhsIndex < rhsIndex
                }
        }
    }
    
    func item(context: AccountContext, presentationData: PresentationData, interaction: LocationViewInteraction?) -> ListViewItem {
        switch self {
            case let .info(_, location, address, distance, time):
                let addressString: String?
                if let address = address {
                    addressString = address
                } else {
                    addressString = presentationData.strings.Map_Locating
                }
                let distanceString: String?
                if let distance = distance {
                    distanceString = distance < 10 ? presentationData.strings.Map_YouAreHere : presentationData.strings.Map_DistanceAway(stringForDistance(strings: presentationData.strings, distance: distance)).0
                } else {
                    distanceString = nil
                }
                let eta = time.flatMap { stringForEstimatedDuration(strings: presentationData.strings, eta: $0) }
                return LocationInfoListItem(presentationData: ItemListPresentationData(presentationData), account: context.account, location: location, address: addressString, distance: distanceString, eta: eta, action: {
                    interaction?.goToCoordinate(location.coordinate)
                }, getDirections: {
                    interaction?.requestDirections()
                })
            case let .toggleLiveLocation(_, title, subtitle, coordinate, beginTimstamp, timeout):
                let beginTimeAndTimeout: (Double, Double)?
                if let beginTimstamp = beginTimstamp, let timeout = timeout {
                    beginTimeAndTimeout = (beginTimstamp, timeout)
                } else {
                    beginTimeAndTimeout = nil
                }
                return LocationActionListItem(presentationData: ItemListPresentationData(presentationData), account: context.account, title: title, subtitle: subtitle, icon: beginTimeAndTimeout != nil ? .stopLiveLocation : .liveLocation, beginTimeAndTimeout: beginTimeAndTimeout, action: {
                    if beginTimeAndTimeout != nil {
                        interaction?.stopLiveLocation()
                    } else if let coordinate = coordinate {
                        interaction?.sendLiveLocation(coordinate, nil)
                    }
                }, highlighted: { highlight in
                    interaction?.updateSendActionHighlight(highlight)
                })
            case let .liveLocation(_, dateTimeFormat, nameDisplayOrder, message, distance, _):
                return LocationLiveListItem(presentationData: ItemListPresentationData(presentationData), dateTimeFormat: dateTimeFormat, nameDisplayOrder: nameDisplayOrder, context: context, message: message, distance: distance, action: {}, longTapAction: {})
        }
    }
}

private func preparedTransition(from fromEntries: [LocationViewEntry], to toEntries: [LocationViewEntry], context: AccountContext, presentationData: PresentationData, interaction: LocationViewInteraction?) -> LocationViewTransaction {
    let (deleteIndices, indicesAndItems, updateIndices) = mergeListsStableWithUpdates(leftList: fromEntries, rightList: toEntries)
    
    let deletions = deleteIndices.map { ListViewDeleteItem(index: $0, directionHint: nil) }
    let insertions = indicesAndItems.map { ListViewInsertItem(index: $0.0, previousIndex: $0.2, item: $0.1.item(context: context, presentationData: presentationData, interaction: interaction), directionHint: nil) }
    let updates = updateIndices.map { ListViewUpdateItem(index: $0.0, previousIndex: $0.2, item: $0.1.item(context: context, presentationData: presentationData, interaction: interaction), directionHint: nil) }
    
    return LocationViewTransaction(deletions: deletions, insertions: insertions, updates: updates)
}

enum LocationViewLocation: Equatable {
    case initial
    case user
    case coordinate(CLLocationCoordinate2D, Bool)
    case custom
}

struct LocationViewState {
    var mapMode: LocationMapMode
    var displayingMapModeOptions: Bool
    var selectedLocation: LocationViewLocation
    var trackingMode: LocationTrackingMode
    
    init() {
        self.mapMode = .map
        self.displayingMapModeOptions = false
        self.selectedLocation = .initial
        self.trackingMode = .none
    }
}

final class LocationViewControllerNode: ViewControllerTracingNode, CLLocationManagerDelegate {
    private let context: AccountContext
    private var presentationData: PresentationData
    private let presentationDataPromise: Promise<PresentationData>
    private var subject: Message
    private let interaction: LocationViewInteraction
    private let locationManager: LocationManager
    
    private let listNode: ListView
    let headerNode: LocationMapHeaderNode
    private let optionsNode: LocationOptionsNode
    
    private var enqueuedTransitions: [LocationViewTransaction] = []
    
    private var disposable: Disposable?
    private var state: LocationViewState
    private let statePromise: Promise<LocationViewState>
    
    private var validLayout: (layout: ContainerViewLayout, navigationHeight: CGFloat)?
    private var listOffset: CGFloat?
    
    private var displayedProximityAlertTooltip = false

    init(context: AccountContext, presentationData: PresentationData, subject: Message, interaction: LocationViewInteraction, locationManager: LocationManager) {
        self.context = context
        self.presentationData = presentationData
        self.presentationDataPromise = Promise(presentationData)
        self.subject = subject
        self.interaction = interaction
        self.locationManager = locationManager
        
        self.state = LocationViewState()
        self.statePromise = Promise(self.state)
        
        self.listNode = ListView()
        self.listNode.backgroundColor = self.presentationData.theme.list.plainBackgroundColor
        self.listNode.verticalScrollIndicatorColor = UIColor(white: 0.0, alpha: 0.3)
        self.listNode.verticalScrollIndicatorFollowsOverscroll = true
        
        var setupProximityNotificationImpl: ((Bool) -> Void)?
        self.headerNode = LocationMapHeaderNode(presentationData: presentationData, toggleMapModeSelection: interaction.toggleMapModeSelection, goToUserLocation: interaction.toggleTrackingMode, setupProximityNotification: { reset in
            setupProximityNotificationImpl?(reset)
        })
        self.headerNode.mapNode.isRotateEnabled = false
        
        self.optionsNode = LocationOptionsNode(presentationData: presentationData, updateMapMode: interaction.updateMapMode)
        
        super.init()
        
        self.backgroundColor = self.presentationData.theme.list.plainBackgroundColor
        
        self.addSubnode(self.listNode)
        self.addSubnode(self.headerNode)
        self.addSubnode(self.optionsNode)
        
        let userLocation: Signal<CLLocation?, NoError> = .single(nil)
        |> then(
            throttledUserLocation(self.headerNode.mapNode.userLocation)
        )
        
        var eta: Signal<Double?, NoError> = .single(nil)
        var address: Signal<String?, NoError> = .single(nil)
        
        if let location = getLocation(from: subject), location.liveBroadcastingTimeout == nil {
            eta = .single(nil)
            |> then(driveEta(coordinate: location.coordinate))
            
            if let venue = location.venue, let venueAddress = venue.address, !venueAddress.isEmpty {
                address = .single(venueAddress)
            } else {
                address = .single(nil)
                |> then(
                    reverseGeocodeLocation(latitude: location.latitude, longitude: location.longitude)
                    |> map { placemark -> String? in
                        return placemark?.compactDisplayAddress ?? ""
                    }
                )
            }
        }
        
        let liveLocations = topPeerActiveLiveLocationMessages(viewTracker: context.account.viewTracker, accountPeerId: context.account.peerId, peerId: subject.id.peerId)
        |> map { _, messages -> [Message] in
            return messages
        }
        
        setupProximityNotificationImpl = { [weak self] reset in
            let _ = (liveLocations
            |> take(1)
            |> deliverOnMainQueue).start(next: { [weak self] messages in
                guard let strongSelf = self else {
                    return
                }
                var ownMessageId: MessageId?
                for message in messages {
                    if message.localTags.contains(.OutgoingLiveLocation) {
                        ownMessageId = message.id
                        break
                    }
                }
                interaction.setupProximityNotification(reset, strongSelf.headerNode.mapNode.currentUserLocation?.coordinate, ownMessageId)
                
                let _ = ApplicationSpecificNotice.incrementLocationProximityAlertTip(accountManager: context.sharedContext.accountManager, count: 4).start()
            })
        }
        
        let previousState = Atomic<LocationViewState?>(value: nil)
        let previousUserAnnotation = Atomic<LocationPinAnnotation?>(value: nil)
        let previousAnnotations = Atomic<[LocationPinAnnotation]>(value: [])
        let previousEntries = Atomic<[LocationViewEntry]?>(value: nil)
        
        let selfPeer = context.account.postbox.transaction { transaction -> Peer? in
            return transaction.getPeer(context.account.peerId)
        }
                
        self.disposable = (combineLatest(self.presentationDataPromise.get(), self.statePromise.get(), selfPeer, liveLocations, self.headerNode.mapNode.userLocation, userLocation, address, eta)
        |> deliverOnMainQueue).start(next: { [weak self] presentationData, state, selfPeer, liveLocations, userLocation, distance, address, eta in
            if let strongSelf = self, let location = getLocation(from: subject) {
                var entries: [LocationViewEntry] = []
                var annotations: [LocationPinAnnotation] = []
                var userAnnotation: LocationPinAnnotation? = nil
                var effectiveLiveLocations: [Message] = liveLocations
                
                let currentTime = Int32(CFAbsoluteTimeGetCurrent() + kCFAbsoluteTimeIntervalSince1970)
                
                var proximityNotification: Bool? = nil
                var proximityNotificationRadius: Int32?
                var index: Int = 0
                
                if location.liveBroadcastingTimeout == nil {
                    let subjectLocation = CLLocation(latitude: location.latitude, longitude: location.longitude)
                    let distance = userLocation.flatMap { subjectLocation.distance(from: $0) }
                    
                    entries.append(.info(presentationData.theme, location, address, distance, eta))
                    
                    annotations.append(LocationPinAnnotation(context: context, theme: presentationData.theme, location: location, forcedSelection: true))
                } else {
                    var activeOwnLiveLocation: Message?
                    for message in effectiveLiveLocations {
                        if message.localTags.contains(.OutgoingLiveLocation) {
                            activeOwnLiveLocation = message
                            if let location = getLocation(from: message), let radius = location.liveProximityNotificationRadius {
                                proximityNotificationRadius = radius
                                proximityNotification = true
                            }
                            break
                        }
                    }
                                        
                    let title: String
                    let subtitle: String
                    let beginTime: Double?
                    let timeout: Double?
                    
                    if let message = activeOwnLiveLocation {
                        var liveBroadcastingTimeout: Int32 = 0
                        if let location = getLocation(from: message), let timeout = location.liveBroadcastingTimeout {
                            liveBroadcastingTimeout = timeout
                        }
                        title = presentationData.strings.Map_StopLiveLocation
                        
                        var updateTimestamp = message.timestamp
                        for attribute in message.attributes {
                            if let attribute = attribute as? EditedMessageAttribute {
                                updateTimestamp = attribute.date
                                break
                            }
                        }
                        
                        subtitle = stringForRelativeLiveLocationTimestamp(strings: presentationData.strings, relativeTimestamp: updateTimestamp, relativeTo: currentTime, dateTimeFormat: presentationData.dateTimeFormat)
                        beginTime = Double(message.timestamp)
                        timeout = Double(liveBroadcastingTimeout)
                    } else {
                        title = presentationData.strings.Map_ShareLiveLocation
                        subtitle = presentationData.strings.Map_ShareLiveLocationHelp
                        beginTime = nil
                        timeout = nil
                    }
                    
                    if let channel = subject.author as? TelegramChannel, case .broadcast = channel.info, activeOwnLiveLocation == nil {
                    } else {
                        entries.append(.toggleLiveLocation(presentationData.theme, title, subtitle, userLocation?.coordinate, beginTime, timeout))
                    }
                    
                    var sortedLiveLocations: [Message] = []
                    
                    var effectiveSubject: Message?
                    for message in effectiveLiveLocations {
                        if message.id == subject.id {
                            effectiveSubject = message
                        } else {
                            sortedLiveLocations.append(message)
                        }
                    }
                    if let effectiveSubject = effectiveSubject {
                        sortedLiveLocations.insert(effectiveSubject, at: 0)
                    } else {
                        sortedLiveLocations.insert(subject, at: 0)
                    }
                    effectiveLiveLocations = sortedLiveLocations
                }
                        
                for message in effectiveLiveLocations {
                    if let channel = message.peers[message.id.peerId] as? TelegramChannel, case .broadcast = channel.info, message.threadId != nil {
                        continue
                    }
                    
                    var liveBroadcastingTimeout: Int32 = 0
                    if let location = getLocation(from: message), let timeout = location.liveBroadcastingTimeout {
                        liveBroadcastingTimeout = timeout
                    }
                    let remainingTime = max(0, message.timestamp + liveBroadcastingTimeout - currentTime)
                    if message.flags.contains(.Incoming) && remainingTime != 0 && proximityNotification == nil {
                        proximityNotification = false
                    }
                    
                    let subjectLocation = CLLocation(latitude: location.latitude, longitude: location.longitude)
                    let distance = userLocation.flatMap { subjectLocation.distance(from: $0) }
                    
                    if message.localTags.contains(.OutgoingLiveLocation), let selfPeer = selfPeer {
                        userAnnotation = LocationPinAnnotation(context: context, theme: presentationData.theme, message: message, selfPeer: selfPeer, heading: location.heading)
                    } else {
                        annotations.append(LocationPinAnnotation(context: context, theme: presentationData.theme, message: message, selfPeer: selfPeer, heading: location.heading))
                        entries.append(.liveLocation(presentationData.theme, presentationData.dateTimeFormat, presentationData.nameDisplayOrder, message, distance, index))
                    }
                    index += 1
                }
                
                if subject.id.peerId.namespace != Namespaces.Peer.CloudUser, proximityNotification == nil {
                    proximityNotification = false
                }
                if let channel = subject.author as? TelegramChannel, case .broadcast = channel.info {
                    proximityNotification = nil
                }
                
                let previousEntries = previousEntries.swap(entries)
                let previousState = previousState.swap(state)
                        
                let transition = preparedTransition(from: previousEntries ?? [], to: entries, context: context, presentationData: presentationData, interaction: strongSelf.interaction)
                strongSelf.enqueueTransition(transition)
                
                strongSelf.headerNode.updateState(mapMode: state.mapMode, trackingMode: state.trackingMode, displayingMapModeOptions: state.displayingMapModeOptions, displayingPlacesButton: false, proximityNotification: proximityNotification, animated: false)
                
                if let proximityNotification = proximityNotification, !proximityNotification && !strongSelf.displayedProximityAlertTooltip {
                    strongSelf.displayedProximityAlertTooltip = true
                    
                    let _ = (ApplicationSpecificNotice.getLocationProximityAlertTip(accountManager: context.sharedContext.accountManager)
                    |> deliverOnMainQueue).start(next: { [weak self] counter in
                        if let strongSelf = self, counter < 3 {
                            let _ = ApplicationSpecificNotice.incrementLocationProximityAlertTip(accountManager: context.sharedContext.accountManager).start()
                            strongSelf.displayProximityAlertTooltip()
                        }
                    })
                }
                
                switch state.selectedLocation {
                    case .initial:
                        if previousState?.selectedLocation != .initial {
                            strongSelf.headerNode.mapNode.setMapCenter(coordinate: location.coordinate, span: viewMapSpan, animated: previousState != nil)
                        }
                    case let .coordinate(coordinate, defaultSpan):
                        if let previousState = previousState, case let .coordinate(previousCoordinate, _) = previousState.selectedLocation, previousCoordinate == coordinate {
                        } else {
                            strongSelf.headerNode.mapNode.setMapCenter(coordinate: coordinate, span: defaultSpan ? defaultMapSpan : viewMapSpan, animated: true)
                        }
                    case .user:
                        if previousState?.selectedLocation != .user, let userLocation = userLocation {
                            strongSelf.headerNode.mapNode.setMapCenter(coordinate: userLocation.coordinate, isUserLocation: true, animated: true)
                        }
                    case .custom:
                        break
                }
                strongSelf.headerNode.mapNode.trackingMode = state.trackingMode
                
                let previousAnnotations = previousAnnotations.swap(annotations)
                let previousUserAnnotation = previousUserAnnotation.swap(userAnnotation)
                if (userAnnotation == nil) != (previousUserAnnotation == nil) {
                    strongSelf.headerNode.mapNode.userLocationAnnotation = userAnnotation
                }
                if annotations != previousAnnotations {
                    strongSelf.headerNode.mapNode.annotations = annotations
                }
                
                if let _ = proximityNotification {
                    strongSelf.headerNode.mapNode.activeProximityRadius = proximityNotificationRadius.flatMap { Double($0)  }
                } else {
                    strongSelf.headerNode.mapNode.activeProximityRadius = nil
                }
                let rightBarButtonAction: LocationViewRightBarButton
                if location.liveBroadcastingTimeout != nil {
                    if liveLocations.count > 1 {
                        rightBarButtonAction = .showAll
                    } else {
                        rightBarButtonAction = .none
                    }
                } else {
                    rightBarButtonAction = .share
                }
                strongSelf.interaction.updateRightBarButton(rightBarButtonAction)
                
                if let (layout, navigationBarHeight) = strongSelf.validLayout {
                    var updateLayout = false
                    let transition: ContainedViewLayoutTransition = .animated(duration: 0.45, curve: .spring)
                    if previousState?.displayingMapModeOptions != state.displayingMapModeOptions {
                        updateLayout = true
                    }
                    
                    if updateLayout {
                        strongSelf.containerLayoutUpdated(layout, navigationHeight: navigationBarHeight, transition: transition)
                    }
                }
            }
        })
        
        self.listNode.updateFloatingHeaderOffset = { [weak self] offset, listTransition in
            guard let strongSelf = self, let (layout, navigationBarHeight) = strongSelf.validLayout, strongSelf.listNode.scrollEnabled else {
                return
            }
            let overlap: CGFloat = 6.0
            strongSelf.listOffset = max(0.0, offset)
            let headerFrame = CGRect(origin: CGPoint(), size: CGSize(width: layout.size.width, height: max(0.0, offset + overlap)))
            listTransition.updateFrame(node: strongSelf.headerNode, frame: headerFrame)
            strongSelf.headerNode.updateLayout(layout: layout, navigationBarHeight: navigationBarHeight, topPadding: strongSelf.state.displayingMapModeOptions ? 38.0 : 0.0, offset: 0.0, size: headerFrame.size, transition: listTransition)
        }
        
        self.listNode.beganInteractiveDragging = { [weak self] in
            guard let strongSelf = self else {
                return
            }
            strongSelf.updateState { state in
                var state = state
                state.displayingMapModeOptions = false
                return state
            }
        }
        
        self.headerNode.mapNode.beganInteractiveDragging = { [weak self] in
            guard let strongSelf = self else {
                return
            }
            strongSelf.updateState { state in
                var state = state
                state.displayingMapModeOptions = false
                state.selectedLocation = .custom
                state.trackingMode = .none
                return state
            }
        }
        
        self.locationManager.manager.startUpdatingHeading()
        self.locationManager.manager.delegate = self
    }
    
    deinit {
        self.disposable?.dispose()
        
        self.locationManager.manager.stopUpdatingHeading()
    }
    
    func locationManager(_ manager: CLLocationManager, didUpdateHeading newHeading: CLHeading) {
        self.headerNode.mapNode.userHeading = CGFloat(newHeading.magneticHeading)
    }
    
    func updatePresentationData(_ presentationData: PresentationData) {
        self.presentationData = presentationData
        self.presentationDataPromise.set(.single(presentationData))
        
        self.backgroundColor = self.presentationData.theme.list.plainBackgroundColor
        self.listNode.backgroundColor = self.presentationData.theme.list.plainBackgroundColor
        self.headerNode.updatePresentationData(self.presentationData)
        self.optionsNode.updatePresentationData(self.presentationData)
    }
    
    func updateState(_ f: (LocationViewState) -> LocationViewState) {
        self.state = f(self.state)
        self.statePromise.set(.single(self.state))
    }
    
    func updateSendActionHighlight(_ highlighted: Bool) {
        self.headerNode.updateHighlight(highlighted)
    }
    
    private func enqueueTransition(_ transition: LocationViewTransaction) {
        self.enqueuedTransitions.append(transition)
        
        if let _ = self.validLayout {
            while !self.enqueuedTransitions.isEmpty {
                self.dequeueTransition()
            }
        }
    }
    
    private func dequeueTransition() {
        guard let _ = self.validLayout, let transition = self.enqueuedTransitions.first else {
            return
        }
        self.enqueuedTransitions.remove(at: 0)
        
        let options = ListViewDeleteAndInsertOptions()
        self.listNode.transaction(deleteIndices: transition.deletions, insertIndicesAndItems: transition.insertions, updateIndicesAndItems: transition.updates, options: options, updateSizeAndInsets: nil, updateOpaqueState: nil, completion: { _ in
        })
    }
    
    func scrollToTop() {
        self.listNode.transaction(deleteIndices: [], insertIndicesAndItems: [], updateIndicesAndItems: [], options: [.Synchronous, .LowLatency], scrollToItem: ListViewScrollToItem(index: 0, position: .top(0.0), animated: true, curve: .Default(duration: nil), directionHint: .Up), updateSizeAndInsets: nil, stationaryItemRange: nil, updateOpaqueState: nil, completion: { _ in })
    }
    
    func setProximityIndicator(radius: Int32?) {
        if let radius = radius {
            self.headerNode.forceIsHidden = true
            
            if var coordinate = self.headerNode.mapNode.currentUserLocation?.coordinate, let span = self.headerNode.mapNode.mapSpan {
                coordinate.latitude -= span.latitudeDelta * 0.11
                self.updateState { state in
                    var state = state
                    state.selectedLocation = .coordinate(coordinate, true)
                    state.trackingMode = .none
                    return state
                }
            }
            
            self.headerNode.mapNode.proximityIndicatorRadius = Double(radius)
        } else {
            self.headerNode.forceIsHidden = false
            self.headerNode.mapNode.proximityIndicatorRadius = nil
            self.updateState { state in
                var state = state
                state.selectedLocation = .user
                state.trackingMode = .none
                return state
            }
        }
    }
    
    func showAll() {
        self.headerNode.mapNode.showAll()
    }
    
    private func displayProximityAlertTooltip() {
        guard let location = self.headerNode.proximityButtonFrame().flatMap({ frame -> CGRect in
            return self.headerNode.view.convert(frame, to: nil)
        }) else {
            return
        }
        
        let _ = (self.context.account.postbox.loadedPeerWithId(self.subject.id.peerId)
        |> deliverOnMainQueue).start(next: { [weak self] peer in
            guard let strongSelf = self else {
                return
            }
          
            var text: String = strongSelf.presentationData.strings.Location_ProximityGroupTip
            if peer.id.namespace == Namespaces.Peer.CloudUser {
                text = strongSelf.presentationData.strings.Location_ProximityTip(peer.compactDisplayTitle).0
            }
            
            strongSelf.interaction.present(TooltipScreen(text: text, icon: nil, location: .point(location.offsetBy(dx: -9.0, dy: 0.0), .right), displayDuration: .custom(3.0), shouldDismissOnTouch: { _ in
                return .dismiss(consume: false)
            }))
        })
    }
    
    func containerLayoutUpdated(_ layout: ContainerViewLayout, navigationHeight: CGFloat, transition: ContainedViewLayoutTransition) {
        let isFirstLayout = self.validLayout == nil
        self.validLayout = (layout, navigationHeight)
        
        let optionsHeight: CGFloat = 38.0
        var actionHeight: CGFloat?
        self.listNode.forEachItemNode { itemNode in
            if let itemNode = itemNode as? LocationActionListItemNode {
                if actionHeight == nil {
                    actionHeight = itemNode.frame.height
                }
            }
        }
        
        let overlap: CGFloat = 6.0
        var topInset: CGFloat = layout.size.height - layout.intrinsicInsets.bottom - 126.0 - overlap
        if let location = getLocation(from: self.subject), location.liveBroadcastingTimeout != nil {
            topInset += 66.0
        }
        
        let headerHeight: CGFloat
        if let listOffset = self.listOffset {
            headerHeight = max(0.0, listOffset + overlap)
        } else {
            headerHeight = topInset + overlap
        }
        let headerFrame = CGRect(origin: CGPoint(), size: CGSize(width: layout.size.width, height: headerHeight))
        transition.updateFrame(node: self.headerNode, frame: headerFrame)
        
        self.headerNode.updateLayout(layout: layout, navigationBarHeight: navigationHeight, topPadding: self.state.displayingMapModeOptions ? optionsHeight : 0.0, offset: 0.0, size: headerFrame.size, transition: transition)
        
        let (duration, curve) = listViewAnimationDurationAndCurve(transition: transition)
        
        let insets = UIEdgeInsets(top: topInset, left: layout.safeInsets.left, bottom: layout.intrinsicInsets.bottom, right: layout.safeInsets.right)
        self.listNode.transaction(deleteIndices: [], insertIndicesAndItems: [], updateIndicesAndItems: [], options: [.Synchronous, .LowLatency], scrollToItem: nil, updateSizeAndInsets: ListViewUpdateSizeAndInsets(size: layout.size, insets: insets, headerInsets: UIEdgeInsets(top: navigationHeight, left: 0.0, bottom: layout.intrinsicInsets.bottom, right: 0.0), scrollIndicatorInsets: UIEdgeInsets(top: topInset + 3.0, left: 0.0, bottom: layout.intrinsicInsets.bottom, right: 0.0), duration: duration, curve: curve), stationaryItemRange: nil, updateOpaqueState: nil, completion: { _ in })
        
        let listFrame: CGRect = CGRect(origin: CGPoint(), size: layout.size)
        transition.updateFrame(node: self.listNode, frame: listFrame)
        
        if isFirstLayout {
            while !self.enqueuedTransitions.isEmpty {
                self.dequeueTransition()
            }
        }
        
        let optionsOffset: CGFloat = self.state.displayingMapModeOptions ? navigationHeight : navigationHeight - optionsHeight
        let optionsFrame = CGRect(x: 0.0, y: optionsOffset, width: layout.size.width, height: optionsHeight)
        transition.updateFrame(node: self.optionsNode, frame: optionsFrame)
        self.optionsNode.updateLayout(size: optionsFrame.size, leftInset: layout.safeInsets.left, rightInset: layout.safeInsets.right, transition: transition)
        self.optionsNode.isUserInteractionEnabled = self.state.displayingMapModeOptions
    }
}