import Foundation
import UIKit
import Display
import AsyncDisplayKit
import Postbox
import TelegramCore
import SyncCore
import SwiftSignalKit
import TelegramPresentationData
import AccountContext
import ContactListUI
import CallListUI
import ChatListUI
import SettingsUI
import AppBundle
import DatePickerNode

public final class TelegramRootController: NavigationController {
    private let context: AccountContext
    
    public var rootTabController: TabBarController?
    
    public var contactsController: ContactsController?
    public var callListController: CallListController?
    public var chatListController: ChatListController?
    public var accountSettingsController: PeerInfoScreen?
    
    private var permissionsDisposable: Disposable?
    private var presentationDataDisposable: Disposable?
    private var presentationData: PresentationData
        
    public init(context: AccountContext) {
        self.context = context
        
        self.presentationData = context.sharedContext.currentPresentationData.with { $0 }
        
        let navigationDetailsBackgroundMode: NavigationEmptyDetailsBackgoundMode?
        switch presentationData.chatWallpaper {
        case .color:
            let image = generateTintedImage(image: UIImage(bundleImageName: "Chat List/EmptyMasterDetailIcon"), color: presentationData.theme.chatList.messageTextColor.withAlphaComponent(0.2))
            navigationDetailsBackgroundMode = image != nil ? .image(image!) : nil
        default:
            let image = chatControllerBackgroundImage(theme: presentationData.theme, wallpaper: presentationData.chatWallpaper, mediaBox: context.account.postbox.mediaBox, knockoutMode: context.sharedContext.immediateExperimentalUISettings.knockoutWallpaper)
            navigationDetailsBackgroundMode = image != nil ? .wallpaper(image!) : nil
        }
        
        super.init(mode: .automaticMasterDetail, theme: NavigationControllerTheme(presentationTheme: self.presentationData.theme), backgroundDetailsMode: navigationDetailsBackgroundMode)
        
        self.presentationDataDisposable = (context.sharedContext.presentationData
        |> deliverOnMainQueue).start(next: { [weak self] presentationData in
            if let strongSelf = self {
                if presentationData.chatWallpaper != strongSelf.presentationData.chatWallpaper {
                    let navigationDetailsBackgroundMode: NavigationEmptyDetailsBackgoundMode?
                    switch presentationData.chatWallpaper {
                        case .color:
                            let image = generateTintedImage(image: UIImage(bundleImageName: "Chat List/EmptyMasterDetailIcon"), color: presentationData.theme.chatList.messageTextColor.withAlphaComponent(0.2))
                            navigationDetailsBackgroundMode = image != nil ? .image(image!) : nil
                        default:
                            navigationDetailsBackgroundMode = chatControllerBackgroundImage(theme: presentationData.theme, wallpaper: presentationData.chatWallpaper, mediaBox: strongSelf.context.sharedContext.accountManager.mediaBox, knockoutMode: strongSelf.context.sharedContext.immediateExperimentalUISettings.knockoutWallpaper).flatMap(NavigationEmptyDetailsBackgoundMode.wallpaper)
                    }
                    strongSelf.updateBackgroundDetailsMode(navigationDetailsBackgroundMode, transition: .immediate)
                }

                let previousTheme = strongSelf.presentationData.theme
                strongSelf.presentationData = presentationData
                if previousTheme !== presentationData.theme {
                    strongSelf.rootTabController?.updateTheme(navigationBarPresentationData: NavigationBarPresentationData(presentationData: presentationData), theme: TabBarControllerTheme(rootControllerTheme: presentationData.theme))
                    strongSelf.rootTabController?.statusBar.statusBarStyle = presentationData.theme.rootController.statusBarStyle.style
                }
            }
        })
    }
    
    required public init(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    deinit {
        self.permissionsDisposable?.dispose()
        self.presentationDataDisposable?.dispose()
    }
    
    public func addRootControllers(showCallsTab: Bool) {
        let tabBarController = TabBarController(navigationBarPresentationData: NavigationBarPresentationData(presentationData: self.presentationData), theme: TabBarControllerTheme(rootControllerTheme: self.presentationData.theme))
        tabBarController.navigationPresentation = .master
        let chatListController = self.context.sharedContext.makeChatListController(context: self.context, groupId: .root, controlsHistoryPreload: true, hideNetworkActivityStatus: false, previewing: false, enableDebugActions: !GlobalExperimentalSettings.isAppStoreBuild)
        if let sharedContext = self.context.sharedContext as? SharedAccountContextImpl {
            chatListController.tabBarItem.badgeValue = sharedContext.switchingData.chatListBadge
        }
        let callListController = CallListController(context: self.context, mode: .tab)
        
        var controllers: [ViewController] = []
        
        let contactsController = ContactsController(context: self.context)
        contactsController.switchToChatsController = {  [weak self] in
            self?.openChatsController(activateSearch: false)
        }
        controllers.append(contactsController)
        
        if showCallsTab {
            controllers.append(callListController)
        }
        controllers.append(chatListController)
        
        var restoreSettignsController: (ViewController & SettingsController)?
        if let sharedContext = self.context.sharedContext as? SharedAccountContextImpl {
            restoreSettignsController = sharedContext.switchingData.settingsController
        }
        restoreSettignsController?.updateContext(context: self.context)
        if let sharedContext = self.context.sharedContext as? SharedAccountContextImpl {
            sharedContext.switchingData = (nil, nil, nil)
        }
        
        let accountSettingsController = PeerInfoScreen(context: self.context, peerId: self.context.account.peerId, avatarInitiallyExpanded: false, isOpenedFromChat: false, nearbyPeerDistance: nil, callMessages: [], isSettings: true)
        accountSettingsController.tabBarItemDebugTapAction = { [weak self, weak accountSettingsController] in
            guard let strongSelf = self, let accountSettingsController = accountSettingsController else {
                return
            }
            accountSettingsController.push(debugController(sharedContext: strongSelf.context.sharedContext, context: strongSelf.context))
        }
        controllers.append(accountSettingsController)
        
        tabBarController.setControllers(controllers, selectedIndex: restoreSettignsController != nil ? (controllers.count - 1) : (controllers.count - 2))
        
        self.contactsController = contactsController
        self.callListController = callListController
        self.chatListController = chatListController
        self.accountSettingsController = accountSettingsController
        self.rootTabController = tabBarController
        self.pushViewController(tabBarController, animated: false)
    }
        
    public func updateRootControllers(showCallsTab: Bool) {
        guard let rootTabController = self.rootTabController else {
            return
        }
        var controllers: [ViewController] = []
        controllers.append(self.contactsController!)
        if showCallsTab {
            controllers.append(self.callListController!)
        }
        controllers.append(self.chatListController!)
        controllers.append(self.accountSettingsController!)
        
        rootTabController.setControllers(controllers, selectedIndex: nil)
    }
    
    public func openChatsController(activateSearch: Bool, filter: ChatListSearchFilter = .chats, query: String? = nil) {
        guard let rootTabController = self.rootTabController else {
            return
        }
        
        if activateSearch {
            self.popToRoot(animated: false)
        }
        
        if let index = rootTabController.controllers.firstIndex(where: { $0 is ChatListController}) {
            rootTabController.selectedIndex = index
        }
        
        if activateSearch {
            self.chatListController?.activateSearch(filter: filter, query: query)
        }
    }
    
    public func openRootCompose() {
        self.chatListController?.activateCompose()
    }
    
    public func openRootCamera() {
        guard let controller = self.viewControllers.last as? ViewController else {
            return
        }
        controller.view.endEditing(true)
        presentedLegacyShortcutCamera(context: self.context, saveCapturedMedia: false, saveEditedPhotos: false, mediaGrouping: true, parentController: controller)
    }
}