import Foundation
import UIKit
import AsyncDisplayKit
import TelegramCore
import SyncCore
import Postbox
import Display
import SwiftSignalKit
import TelegramUIPreferences
import TelegramPresentationData
import AccountContext
import OverlayStatusController
import AlertUI
import PresentationDataUtils
import PassportUI
import InstantPageUI
import StickerPackPreviewUI
import JoinLinkPreviewUI
import LanguageLinkPreviewUI
import SettingsUI
import UrlHandling
import ShareController
import ChatInterfaceState

private func defaultNavigationForPeerId(_ peerId: PeerId?, navigation: ChatControllerInteractionNavigateToPeer) -> ChatControllerInteractionNavigateToPeer {
    if case .default = navigation {
        if let peerId = peerId {
            if peerId.namespace == Namespaces.Peer.CloudUser {
                return .chat(textInputState: nil, subject: nil, peekData: nil)
            } else {
                return .chat(textInputState: nil, subject: nil, peekData: nil)
            }
        } else {
            return .info
        }
    } else {
        return navigation
    }
}

func openResolvedUrlImpl(_ resolvedUrl: ResolvedUrl, context: AccountContext, urlContext: OpenURLContext, navigationController: NavigationController?, openPeer: @escaping (PeerId, ChatControllerInteractionNavigateToPeer) -> Void, sendFile: ((FileMediaReference) -> Void)?, sendSticker: ((FileMediaReference, ASDisplayNode, CGRect) -> Bool)?, present: @escaping (ViewController, Any?) -> Void, dismissInput: @escaping () -> Void, contentContext: Any?) {
    let presentationData = context.sharedContext.currentPresentationData.with { $0 }
    switch resolvedUrl {
        case let .externalUrl(url):
            context.sharedContext.openExternalUrl(context: context, urlContext: urlContext, url: url, forceExternal: false, presentationData: context.sharedContext.currentPresentationData.with { $0 }, navigationController: navigationController, dismissInput: dismissInput)
        case let .peer(peerId, navigation):
            if let peerId = peerId {
                openPeer(peerId, defaultNavigationForPeerId(peerId, navigation: navigation))
            } else {
                present(textAlertController(context: context, title: nil, text: presentationData.strings.Resolve_ErrorNotFound, actions: [TextAlertAction(type: .defaultAction, title: presentationData.strings.Common_OK, action: {})]), nil)
            }
        case .inaccessiblePeer:
            present(standardTextAlertController(theme: AlertControllerTheme(presentationData: presentationData), title: nil, text: presentationData.strings.Conversation_ErrorInaccessibleMessage, actions: [TextAlertAction(type: .defaultAction, title: presentationData.strings.Common_OK, action: {})]), nil)
        case let .botStart(peerId, payload):
            openPeer(peerId, .withBotStartPayload(ChatControllerInitialBotStart(payload: payload, behavior: .interactive)))
        case let .groupBotStart(botPeerId, payload):
            let controller = context.sharedContext.makePeerSelectionController(PeerSelectionControllerParams(context: context, filter: [.onlyWriteable, .onlyGroups, .onlyManageable], title: presentationData.strings.UserInfo_InviteBotToGroup))
            controller.peerSelected = { [weak controller] peerId in
                if payload.isEmpty {
                    if peerId.namespace == Namespaces.Peer.CloudGroup {
                        let _ = (addGroupMember(account: context.account, peerId: peerId, memberId: botPeerId)
                        |> deliverOnMainQueue).start(completed: {
                            controller?.dismiss()
                        })
                    } else {
                        let _ = (addChannelMember(account: context.account, peerId: peerId, memberId: botPeerId)
                        |> deliverOnMainQueue).start(completed: {
                            controller?.dismiss()
                        })
                    }
                } else {
                    let _ = (requestStartBotInGroup(account: context.account, botPeerId: botPeerId, groupPeerId: peerId, payload: payload)
                    |> deliverOnMainQueue).start(next: { result in
                        if let navigationController = navigationController {
                            context.sharedContext.navigateToChatController(NavigateToChatControllerParams(navigationController: navigationController, context: context, chatLocation: .peer(peerId)))
                        }
                        switch result {
                            case let .channelParticipant(participant):
                                context.peerChannelMemberCategoriesContextsManager.externallyAdded(peerId: peerId, participant: participant)
                            case .none:
                                break
                        }
                        controller?.dismiss()
                    }, error: { _ in
                        
                    })
                }
            }
            dismissInput()
            navigationController?.pushViewController(controller)
        case let .channelMessage(peerId, messageId):
            openPeer(peerId, .chat(textInputState: nil, subject: .message(id: messageId, highlight: true), peekData: nil))
        case let .replyThreadMessage(replyThreadMessage, messageId):
            if let navigationController = navigationController {
                let _ = ChatControllerImpl.openMessageReplies(context: context, navigationController: navigationController, present: { c, a in
                    present(c, a)
                }, messageId: replyThreadMessage.messageId, isChannelPost: replyThreadMessage.isChannelPost, atMessage: messageId, displayModalProgress: true).start()
            }
        case let .stickerPack(name):
            dismissInput()
            if false {
                var mainStickerPack: StickerPackReference?
                var stickerPacks: [StickerPackReference] = []
                if let message = contentContext as? Message {
                    let dataDetector = try? NSDataDetector(types: NSTextCheckingResult.CheckingType([.link]).rawValue)
                    if let matches = dataDetector?.matches(in: message.text, options: [], range: NSRange(message.text.startIndex ..< message.text.endIndex, in: message.text)) {
                        for match in matches {
                            guard let stringRange = Range(match.range, in: message.text) else {
                                continue
                            }
                            let urlText = String(message.text[stringRange])
                            if let resultName = parseStickerPackUrl(urlText) {
                                stickerPacks.append(.name(resultName))
                                if resultName == name {
                                    mainStickerPack = .name(resultName)
                                }
                            }
                        }
                        if mainStickerPack == nil {
                            mainStickerPack = .name(name)
                            stickerPacks.insert(.name(name), at: 0)
                        }
                    } else {
                        mainStickerPack = .name(name)
                        stickerPacks = [.name(name)]
                    }
                } else {
                    mainStickerPack = .name(name)
                    stickerPacks = [.name(name)]
                }
                if let mainStickerPack = mainStickerPack, !stickerPacks.isEmpty {
                    let controller = StickerPackScreen(context: context, mainStickerPack: mainStickerPack, stickerPacks: stickerPacks, parentNavigationController: navigationController, sendSticker: sendSticker)
                    present(controller, nil)
                }
            } else {
                let controller = StickerPackScreen(context: context, mainStickerPack: .name(name), stickerPacks: [.name(name)], parentNavigationController: navigationController, sendSticker: sendSticker)
                present(controller, nil)
            }
        case let .instantView(webpage, anchor):
            navigationController?.pushViewController(InstantPageController(context: context, webPage: webpage, sourcePeerType: .channel, anchor: anchor))
        case let .join(link):
            dismissInput()
            present(JoinLinkPreviewController(context: context, link: link, navigateToPeer: { peerId, peekData in
                openPeer(peerId, .chat(textInputState: nil, subject: nil, peekData: peekData))
            }, parentNavigationController: navigationController), nil)
        case let .localization(identifier):
            dismissInput()
            present(LanguageLinkPreviewController(context: context, identifier: identifier), nil)
        case let .proxy(host, port, username, password, secret):
            let server: ProxyServerSettings
            if let secret = secret {
                server = ProxyServerSettings(host: host, port: abs(port), connection: .mtp(secret: secret))
            } else {
                server = ProxyServerSettings(host: host, port: abs(port), connection: .socks5(username: username, password: password))
            }

            dismissInput()
            present(ProxyServerActionSheetController(context: context, server: server), nil)
        case let .confirmationCode(code):
            if let topController = navigationController?.topViewController as? ChangePhoneNumberCodeController {
                topController.applyCode(code)
            } else {
                var found = false
                navigationController?.currentWindow?.forEachController({ controller in
                    if let controller = controller as? SecureIdPlaintextFormController {
                        controller.applyPhoneCode(code)
                        found = true
                    }
                })
                if !found {
                    let presentationData = context.sharedContext.currentPresentationData.with { $0 }
                    present(textAlertController(context: context, title: nil, text: presentationData.strings.AuthCode_Alert(formattedConfirmationCode(code)).0, actions: [TextAlertAction(type: .defaultAction, title: presentationData.strings.Common_OK, action: {})]), nil)
                }
            }
        case let .cancelAccountReset(phone, hash):
            let presentationData = context.sharedContext.currentPresentationData.with { $0 }
            let controller = OverlayStatusController(theme: presentationData.theme, type: .loading(cancelled: nil))
            present(controller, nil)
            let _ = (requestCancelAccountResetData(network: context.account.network, hash: hash)
            |> deliverOnMainQueue).start(next: { [weak controller] data in
                controller?.dismiss()
                present(confirmPhoneNumberCodeController(context: context, phoneNumber: phone, codeData: data), ViewControllerPresentationArguments(presentationAnimation: .modalSheet))
            }, error: { [weak controller] error in
                controller?.dismiss()
                
                let text: String
                switch error {
                    case .limitExceeded:
                        text = presentationData.strings.Login_CodeFloodError
                    case .generic:
                        text = presentationData.strings.Login_UnknownError
                }
                let presentationData = context.sharedContext.currentPresentationData.with { $0 }
                present(textAlertController(context: context, title: nil, text: text, actions: [TextAlertAction(type: .defaultAction, title: presentationData.strings.Common_OK, action: {})]), nil)
            })
            dismissInput()
        case let .share(url, text, to):
            let continueWithPeer: (PeerId) -> Void = { peerId in
                let textInputState: ChatTextInputState?
                if let text = text, !text.isEmpty {
                    if let url = url, !url.isEmpty {
                        let urlString = NSMutableAttributedString(string: "\(url)\n")
                        let textString = NSAttributedString(string: "\(text)")
                        let selectionRange: Range<Int> = urlString.length ..< (urlString.length + textString.length)
                        urlString.append(textString)
                        textInputState = ChatTextInputState(inputText: urlString, selectionRange: selectionRange)
                    } else {
                        textInputState = ChatTextInputState(inputText: NSAttributedString(string: "\(text)"))
                    }
                } else if let url = url, !url.isEmpty {
                    textInputState = ChatTextInputState(inputText: NSAttributedString(string: "\(url)"))
                } else {
                    textInputState = nil
                }
                
                if let textInputState = textInputState {
                    let _ = (context.account.postbox.transaction({ transaction -> Void in
                        transaction.updatePeerChatInterfaceState(peerId, update: { currentState in
                            if let currentState = currentState as? ChatInterfaceState {
                                return currentState.withUpdatedComposeInputState(textInputState)
                            } else {
                                return ChatInterfaceState().withUpdatedComposeInputState(textInputState)
                            }
                        })
                    })
                    |> deliverOnMainQueue).start(completed: {
                        navigationController?.pushViewController(ChatControllerImpl(context: context, chatLocation: .peer(peerId)))
                    })
                } else {
                    navigationController?.pushViewController(ChatControllerImpl(context: context, chatLocation: .peer(peerId)))
                }
            }
            
            if let to = to {
                if to.hasPrefix("@") {
                    let _ = (resolvePeerByName(account: context.account, name: String(to[to.index(to.startIndex, offsetBy: 1)...]))
                    |> deliverOnMainQueue).start(next: { peerId in
                        if let peerId = peerId {
                            let _ = (context.account.postbox.loadedPeerWithId(peerId)
                            |> deliverOnMainQueue).start(next: { peer in
                                context.sharedContext.applicationBindings.dismissNativeController()
                                continueWithPeer(peer.id)
                            })
                        }
                    })
                } else {
                    let query = to.trimmingCharacters(in: CharacterSet(charactersIn: "0123456789").inverted)
                    let _ = (context.account.postbox.searchContacts(query: query)
                    |> deliverOnMainQueue).start(next: { (peers, _) in
                        for case let peer as TelegramUser in peers {
                            if peer.phone == query {
                                context.sharedContext.applicationBindings.dismissNativeController()
                                continueWithPeer(peer.id)
                                break
                            }
                        }
                    })
                }
            } else {
                if let url = url, !url.isEmpty {
                    let shareController = ShareController(context: context, subject: .url(url), presetText: text, externalShare: false, immediateExternalShare: false)
                    present(shareController, nil)
                    context.sharedContext.applicationBindings.dismissNativeController()
                } else {
                    let controller = context.sharedContext.makePeerSelectionController(PeerSelectionControllerParams(context: context, filter: [.onlyWriteable, .excludeDisabled]))
                    controller.peerSelected = { [weak controller] peerId in
                        if let strongController = controller {
                            strongController.dismiss()
                            continueWithPeer(peerId)
                        }
                    }
                    context.sharedContext.applicationBindings.dismissNativeController()
                    navigationController?.pushViewController(controller)
                }
            }
        case let .wallpaper(parameter):
            let presentationData = context.sharedContext.currentPresentationData.with { $0 }
            var controller: ViewController?
            
            let signal: Signal<TelegramWallpaper, GetWallpaperError>
            var options: WallpaperPresentationOptions?
            var topColor: UIColor?
            var bottomColor: UIColor?
            var intensity: Int32?
            var rotation: Int32?
            switch parameter {
                case let .slug(slug, wallpaperOptions, firstColor, secondColor, intensityValue, rotationValue):
                    signal = getWallpaper(network: context.account.network, slug: slug)
                    options = wallpaperOptions
                    topColor = firstColor
                    bottomColor = secondColor
                    intensity = intensityValue
                    rotation = rotationValue
                    controller = OverlayStatusController(theme: presentationData.theme, type: .loading(cancelled: nil))
                    present(controller!, nil)
                case let .color(color):
                    signal = .single(.color(color.argb))
                case let .gradient(topColor, bottomColor, rotation):
                    signal = .single(.gradient(topColor.argb, bottomColor.argb, WallpaperSettings()))
            }
            
            let _ = (signal
            |> deliverOnMainQueue).start(next: { [weak controller] wallpaper in
                controller?.dismiss()
                let galleryController = WallpaperGalleryController(context: context, source: .wallpaper(wallpaper, options, topColor, bottomColor, intensity, rotation, nil))
                present(galleryController, nil)
            }, error: { [weak controller] error in
                controller?.dismiss()
            })
            dismissInput()
        case let .theme(slug):
            let presentationData = context.sharedContext.currentPresentationData.with { $0 }
            let signal = getTheme(account: context.account, slug: slug)
            |> mapToSignal { themeInfo -> Signal<(Data?, TelegramThemeSettings?, TelegramTheme), GetThemeError> in
                return Signal<(Data?, TelegramThemeSettings?, TelegramTheme), GetThemeError> { subscriber in
                    let disposables = DisposableSet()
                    if let settings = themeInfo.settings {
                        subscriber.putNext((nil, settings, themeInfo))
                        subscriber.putCompletion()
                    } else if let resource = themeInfo.file?.resource {
                        disposables.add(fetchedMediaResource(mediaBox: context.account.postbox.mediaBox, reference: .standalone(resource: resource)).start())
                        
                        let maybeFetched = context.sharedContext.accountManager.mediaBox.resourceData(resource, option: .complete(waitUntilFetchStatus: false), attemptSynchronously: false)
                        |> mapToSignal { maybeData -> Signal<Data?, NoError> in
                            if maybeData.complete {
                                let loadedData = try? Data(contentsOf: URL(fileURLWithPath: maybeData.path), options: [])
                                return .single(loadedData)
                            } else {
                                return context.account.postbox.mediaBox.resourceData(resource, option: .complete(waitUntilFetchStatus: false), attemptSynchronously: false)
                                |> map { next -> Data? in
                                    if next.size > 0, let data = try? Data(contentsOf: URL(fileURLWithPath: next.path), options: []) {
                                        context.sharedContext.accountManager.mediaBox.storeResourceData(resource.id, data: data)
                                        return data
                                    } else {
                                        return nil
                                    }
                                }
                            }
                        }
                   
                        disposables.add(maybeFetched.start(next: { data in
                            if let data = data {
                                subscriber.putNext((data, nil, themeInfo))
                                subscriber.putCompletion()
                            }
                        }))
                    } else {
                        subscriber.putError(.unsupported)
                    }
                    
                    return disposables
                }
            }
            
            var cancelImpl: (() -> Void)?
            let progressSignal = Signal<Never, NoError> { subscriber in
                let controller = OverlayStatusController(theme: presentationData.theme,  type: .loading(cancelled: {
                    cancelImpl?()
                }))
                present(controller, nil)
                return ActionDisposable { [weak controller] in
                    Queue.mainQueue().async() {
                        controller?.dismiss()
                    }
                }
            }
            |> runOn(Queue.mainQueue())
            |> delay(0.35, queue: Queue.mainQueue())
            
            let disposable = MetaDisposable()
            let progressDisposable = progressSignal.start()
            cancelImpl = {
                disposable.set(nil)
            }
            disposable.set((signal
            |> afterDisposed {
                Queue.mainQueue().async {
                    progressDisposable.dispose()
                }
            }
            |> deliverOnMainQueue).start(next: { dataAndTheme in
                if let data = dataAndTheme.0 {
                    if let theme = makePresentationTheme(data: data) {
                        let previewController = ThemePreviewController(context: context, previewTheme: theme, source: .theme(dataAndTheme.2))
                        navigationController?.pushViewController(previewController)
                    }
                } else if let settings = dataAndTheme.1 {
                    if let theme = makePresentationTheme(mediaBox: context.sharedContext.accountManager.mediaBox, themeReference: .builtin(PresentationBuiltinThemeReference(baseTheme: settings.baseTheme)), accentColor: UIColor(argb: settings.accentColor), backgroundColors: nil, bubbleColors: settings.messageColors.flatMap { (UIColor(argb: $0.top), UIColor(argb: $0.bottom)) }, wallpaper: settings.wallpaper) {
                        let previewController = ThemePreviewController(context: context, previewTheme: theme, source: .theme(dataAndTheme.2))
                        navigationController?.pushViewController(previewController)
                    }
                }
            }, error: { error in
                let errorText: String
                switch error {
                    case .generic, .slugInvalid:
                        errorText = presentationData.strings.Theme_ErrorNotFound
                    case .unsupported:
                        errorText = presentationData.strings.Theme_Unsupported
                }
                present(textAlertController(context: context, title: nil, text: errorText, actions: [TextAlertAction(type: .defaultAction, title: presentationData.strings.Common_OK, action: {})]), nil)
            }))
            dismissInput()
        #if ENABLE_WALLET
        case let .wallet(address, amount, comment):
            dismissInput()
            context.sharedContext.openWallet(context: context, walletContext: .send(address: address, amount: amount, comment: comment)) { c in
                navigationController?.pushViewController(c)
            }
        #endif
        case let .settings(section):
            dismissInput()
            switch section {
                case .theme:
                    if let navigationController = navigationController {
                        let controller = themeSettingsController(context: context)
                        controller.navigationPresentation = .modal
                        
                        var controllers = navigationController.viewControllers
                        controllers = controllers.filter { !($0 is ThemeSettingsController) }
                        controllers.append(controller)
                        
                        navigationController.setViewControllers(controllers, animated: true)
                    }
                case .devices:
                    if let navigationController = navigationController {
                        let activeSessions = deferred { () -> Signal<(ActiveSessionsContext, Int, WebSessionsContext), NoError> in
                            let activeSessionsContext = ActiveSessionsContext(account: context.account)
                            let webSessionsContext = WebSessionsContext(account: context.account)
                            let otherSessionCount = activeSessionsContext.state
                            |> map { state -> Int in
                                return state.sessions.filter({ !$0.isCurrent }).count
                            }
                            |> distinctUntilChanged
                            
                            return otherSessionCount
                            |> map { value in
                                return (activeSessionsContext, value, webSessionsContext)
                            }
                        }
                        
                        let _ = (activeSessions
                        |> take(1)
                        |> deliverOnMainQueue).start(next: { activeSessionsContext, count, webSessionsContext in
                            let controller = recentSessionsController(context: context, activeSessionsContext: activeSessionsContext, webSessionsContext: webSessionsContext, websitesOnly: false)
                            controller.navigationPresentation = .modal
                            
                            var controllers = navigationController.viewControllers
                            controllers = controllers.filter { !($0 is RecentSessionsController) }
                            controllers.append(controller)
                            
                            navigationController.setViewControllers(controllers, animated: true)
                        })
                    }
                    break
            }
    }
}