import Foundation
import UIKit
import Display
import AsyncDisplayKit
import SwiftSignalKit
import TelegramCore
import TelegramPresentationData
import LegacyComponents
import ProgressNavigationButtonNode
import ImageCompression
import LegacyMediaPickerUI
import Postbox
import TextFormat
import MoreButtonNode
import ContextUI

final class AuthorizationSequenceSignUpController: ViewController {
    private var controllerNode: AuthorizationSequenceSignUpControllerNode {
        return self.displayNode as! AuthorizationSequenceSignUpControllerNode
    }
    
    private var validLayout: ContainerViewLayout?
    
    private let moreButtonNode: MoreButtonNode
    
    private let presentationData: PresentationData
    private let back: () -> Void
    
    var initialName: (String, String) = ("", "")
    private var termsOfService: UnauthorizedAccountTermsOfService?
    
    var signUpWithName: ((String, String, Data?, Any?, TGVideoEditAdjustments?, Bool) -> Void)?
    var openUrl: ((String) -> Void)?
    
    var avatarAsset: Any?
    var avatarAdjustments: TGVideoEditAdjustments?
    
    var announceSignUp = true
    
    private let hapticFeedback = HapticFeedback()
    
    var inProgress: Bool = false {
        didSet {
            self.updateNavigationItems()
            self.controllerNode.inProgress = self.inProgress
        }
    }
    
    init(presentationData: PresentationData, back: @escaping () -> Void, displayCancel: Bool) {
        self.presentationData = presentationData
        self.back = back
        
        self.moreButtonNode = MoreButtonNode(theme: self.presentationData.theme)
        self.moreButtonNode.iconNode.enqueueState(.more, animated: false)
        
        super.init(navigationBarPresentationData: NavigationBarPresentationData(theme: AuthorizationSequenceController.navigationBarTheme(presentationData.theme), strings: NavigationBarStrings(presentationStrings: presentationData.strings)))
        
        self.supportedOrientations = ViewControllerSupportedOrientations(regularSize: .all, compactSize: .portrait)
        
        self.statusBar.statusBarStyle = presentationData.theme.intro.statusBarStyle.style
        
//        self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: self.presentationData.strings.Common_Next, style: .done, target: self, action: #selector(self.nextPressed))
        
        self.attemptNavigation = { _ in
            return false
        }
        self.navigationBar?.backPressed = { [weak self] in
            guard let strongSelf = self else {
                return
            }
            strongSelf.present(standardTextAlertController(theme: AlertControllerTheme(presentationData: presentationData), title: nil, text: presentationData.strings.Login_CancelSignUpConfirmation, actions: [TextAlertAction(type: .genericAction, title: presentationData.strings.Login_CancelPhoneVerificationContinue, action: {
            }), TextAlertAction(type: .defaultAction, title: presentationData.strings.Login_CancelPhoneVerificationStop, action: {
                back()
            })]), in: .window(.root))
        }
        
        if displayCancel {
            self.navigationItem.leftBarButtonItem = UIBarButtonItem(title: presentationData.strings.Common_Cancel, style: .plain, target: self, action: #selector(self.cancelPressed))
        }
        
        self.navigationItem.rightBarButtonItem = UIBarButtonItem(customDisplayNode: self.moreButtonNode)
        
        self.moreButtonNode.action = { [weak self] _, gesture in
            if let strongSelf = self {
                strongSelf.morePressed(node: strongSelf.moreButtonNode.contextSourceNode, gesture: gesture)
            }
        }
    }
    
    required init(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    @objc private func cancelPressed() {
        self.present(standardTextAlertController(theme: AlertControllerTheme(presentationData: self.presentationData), title: nil, text: self.presentationData.strings.Login_CancelSignUpConfirmation, actions: [TextAlertAction(type: .genericAction, title: self.presentationData.strings.Login_CancelPhoneVerificationContinue, action: {
        }), TextAlertAction(type: .defaultAction, title: self.presentationData.strings.Login_CancelPhoneVerificationStop, action: { [weak self] in
            self?.back()
        })]), in: .window(.root))
    }
    
    @objc private func moreButtonPressed() {
        self.moreButtonNode.buttonPressed()
    }
    
    @objc private func morePressed(node: ContextReferenceContentNode, gesture: ContextGesture?) {
        let presentationData = self.presentationData
        
        let announceSignUp = self.announceSignUp
        var items: [ContextMenuItem] = []
        
        let nop: ((ContextMenuActionItem.Action) -> Void)? = nil
        items.append(.action(ContextMenuActionItem(text: presentationData.strings.Login_Announce_Info, textLayout: .multiline, textFont: .small, icon: { _ in return nil }, action: nop)))
        items.append(.separator)
        items.append(.action(ContextMenuActionItem(text: presentationData.strings.Login_Announce_Notify, icon: { theme in
            if !announceSignUp {
                return nil
            }
            return generateTintedImage(image: UIImage(bundleImageName: "Chat/Context Menu/Check"), color: theme.contextMenu.primaryColor)
        }, iconPosition: .left, action: { [weak self] _, a in
            a(.default)
          
            self?.announceSignUp = true
        })))
        
        items.append(.action(ContextMenuActionItem(text: presentationData.strings.Login_Announce_DontNotify, icon: { theme in
            if announceSignUp {
                return nil
            }
            return generateTintedImage(image: UIImage(bundleImageName: "Chat/Context Menu/Check"), color: theme.contextMenu.primaryColor)
        }, iconPosition: .left, action: { [weak self] _, a in
            a(.default)

            self?.announceSignUp = false
        })))
        
        
        let contextController = ContextController(presentationData: self.presentationData, source: .reference(AuthorizationContextReferenceContentSource(controller: self, sourceNode: node)), items: .single(ContextController.Items(content: .list(items))), gesture: gesture)
        self.present(contextController, in: .window(.root))
    }
    
    func updateNavigationItems() {
        guard let layout = self.validLayout, layout.size.width < 360.0 else {
            return
        }
                
        if self.inProgress {
            let item = UIBarButtonItem(customDisplayNode: ProgressNavigationButtonNode(color: self.presentationData.theme.rootController.navigationBar.accentTextColor))
            self.navigationItem.rightBarButtonItem = item
        } else {
            self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: self.presentationData.strings.Common_Next, style: .done, target: self, action: #selector(self.nextPressed))
        }
    }
    
    override public func loadDisplayNode() {
        let currentAvatarMixin = Atomic<NSObject?>(value: nil)
        
        let theme = self.presentationData.theme
        self.displayNode = AuthorizationSequenceSignUpControllerNode(theme: theme, strings: self.presentationData.strings, addPhoto: { [weak self] in
            presentLegacyAvatarPicker(holder: currentAvatarMixin, signup: true, theme: theme, present: { c, a in
                self?.view.endEditing(true)
                self?.present(c, in: .window(.root), with: a)
            }, openCurrent: nil, completion: { image in
                self?.controllerNode.currentPhoto = image
                self?.avatarAsset = nil
                self?.avatarAdjustments = nil
            }, videoCompletion: { image, asset, adjustments in
                self?.controllerNode.currentPhoto = image
                self?.avatarAsset = asset
                self?.avatarAdjustments = adjustments
            })
        })
        self.displayNodeDidLoad()
        
        self.controllerNode.view.disableAutomaticKeyboardHandling = [.forward, .backward]
        
        self.controllerNode.signUpWithName = { [weak self] _, _ in
            self?.nextPressed()
        }
        self.controllerNode.openTermsOfService = { [weak self] in
            guard let strongSelf = self, let termsOfService = strongSelf.termsOfService else {
                return
            }
            strongSelf.view.endEditing(true)

            let presentAlertImpl: () -> Void = {
                guard let strongSelf = self else {
                    return
                }
                var dismissImpl: (() -> Void)?
                let alertTheme = AlertControllerTheme(presentationData: strongSelf.presentationData)
                let attributedText = stringWithAppliedEntities(termsOfService.text, entities: termsOfService.entities, baseColor: alertTheme.primaryColor, linkColor: alertTheme.accentColor, baseFont: Font.regular(13.0), linkFont: Font.regular(13.0), boldFont: Font.semibold(13.0), italicFont: Font.italic(13.0), boldItalicFont: Font.semiboldItalic(13.0), fixedFont: Font.regular(13.0), blockQuoteFont: Font.regular(13.0), message: nil)
                let contentNode = TextAlertContentNode(theme: alertTheme, title: NSAttributedString(string: strongSelf.presentationData.strings.Login_TermsOfServiceHeader, font: Font.medium(17.0), textColor: alertTheme.primaryColor, paragraphAlignment: .center), text: attributedText, actions: [
                    TextAlertAction(type: .defaultAction, title: strongSelf.presentationData.strings.Common_OK, action: {
                        dismissImpl?()
                    })
                ], actionLayout: .vertical, dismissOnOutsideTap: true)
                contentNode.textAttributeAction = (NSAttributedString.Key(rawValue: TelegramTextAttributes.URL), { value in
                    if let value = value as? String {
                        strongSelf.openUrl?(value)
                    }
                })
                let controller = AlertController(theme: alertTheme, contentNode: contentNode)
                dismissImpl = { [weak controller] in
                    controller?.dismissAnimated()
                }
                strongSelf.view.endEditing(true)
                strongSelf.present(controller, in: .window(.root))
            }
            presentAlertImpl()
        }
        
        self.controllerNode.updateData(firstName: self.initialName.0, lastName: self.initialName.1, hasTermsOfService: self.termsOfService != nil)
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        
        if let navigationController = self.navigationController as? NavigationController, let layout = self.validLayout {
            addTemporaryKeyboardSnapshotView(navigationController: navigationController, parentView: self.view, layout: layout)
        }
        
        self.controllerNode.activateInput()
    }
    
    func updateData(firstName: String, lastName: String, termsOfService: UnauthorizedAccountTermsOfService?) {
        if self.isNodeLoaded {
            if (firstName, lastName) != self.controllerNode.currentName || self.termsOfService != termsOfService {
                self.termsOfService = termsOfService
                self.controllerNode.updateData(firstName: firstName, lastName: lastName, hasTermsOfService: termsOfService != nil)
            }
        } else {
            self.initialName = (firstName, lastName)
            self.termsOfService = termsOfService
        }
    }
    
    override func containerLayoutUpdated(_ layout: ContainerViewLayout, transition: ContainedViewLayoutTransition) {
        super.containerLayoutUpdated(layout, transition: transition)
        
        let hadLayout = self.validLayout != nil
        self.validLayout = layout
        
        if !hadLayout {
            self.updateNavigationItems()
        }
        
        self.controllerNode.containerLayoutUpdated(layout, navigationBarHeight: self.navigationLayout(layout: layout).navigationFrame.maxY, transition: transition)
    }
    
    @objc func nextPressed() {
        let firstName = self.controllerNode.currentName.0.trimmingCharacters(in: .whitespacesAndNewlines)
        let lastName = self.controllerNode.currentName.1.trimmingCharacters(in: .whitespacesAndNewlines)
        
        var name: (String, String)?
        if firstName.isEmpty && lastName.isEmpty {
            self.hapticFeedback.error()
            self.controllerNode.animateError()
            return
        } else if firstName.isEmpty && !lastName.isEmpty {
            name = (lastName, "")
        } else {
            name = (firstName, lastName)
        }
        
        if let name = name {
            self.signUpWithName?(name.0, name.1, self.controllerNode.currentPhoto.flatMap({ image in
                let tempFile = TempBox.shared.tempFile(fileName: "file")
                let result = compressImageToJPEG(image, quality: 0.7, tempFilePath: tempFile.path)
                TempBox.shared.dispose(tempFile)
                return result
            }), self.avatarAsset, self.avatarAdjustments, self.announceSignUp)
        }
    }
}

private final class AuthorizationContextReferenceContentSource: ContextReferenceContentSource {
    private let controller: ViewController
    private let sourceNode: ContextReferenceContentNode
    
    init(controller: ViewController, sourceNode: ContextReferenceContentNode) {
        self.controller = controller
        self.sourceNode = sourceNode
    }
    
    func transitionInfo() -> ContextControllerReferenceViewInfo? {
        return ContextControllerReferenceViewInfo(referenceView: self.sourceNode.view, contentAreaInScreenSpace: UIScreen.main.bounds)
    }
}