import Foundation
import UIKit
import AsyncDisplayKit
import Display
import SwiftSignalKit
import Postbox
import TelegramCore
import TelegramPresentationData
import AvatarNode
import AccountContext
import PhoneNumberFormat

private let avatarFont = avatarPlaceholderFont(size: 16.0)

private let titleFont = Font.medium(14.0)
private let textFont = Font.regular(14.0)

class ChatMessageContactBubbleContentNode: ChatMessageBubbleContentNode {
    private let avatarNode: AvatarNode
    private let dateAndStatusNode: ChatMessageDateAndStatusNode
    private let titleNode: TextNode
    private let textNode: TextNode
    
    private var contact: TelegramMediaContact?
    private var contactInfo : String?
    
    private let buttonNode: ChatMessageAttachedContentButtonNode
    
    required init() {
        self.avatarNode = AvatarNode(font: avatarFont)
        self.dateAndStatusNode = ChatMessageDateAndStatusNode()
        self.titleNode = TextNode()
        self.textNode = TextNode()
        self.buttonNode = ChatMessageAttachedContentButtonNode()
        
        super.init()
        
        self.addSubnode(self.avatarNode)
        self.addSubnode(self.titleNode)
        self.addSubnode(self.textNode)
        self.addSubnode(self.buttonNode)
        
        self.buttonNode.addTarget(self, action: #selector(self.buttonPressed), forControlEvents: .touchUpInside)
    }
    
    override func accessibilityActivate() -> Bool {
        self.buttonPressed()
        return true
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func didLoad() {
        super.didLoad()
        
        let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.contactTap(_:)))
        self.view.addGestureRecognizer(tapRecognizer)
    }
    
    override func asyncLayoutContent() -> (_ item: ChatMessageBubbleContentItem, _ layoutConstants: ChatMessageItemLayoutConstants, _ preparePosition: ChatMessageBubblePreparePosition, _ messageSelection: Bool?, _ constrainedSize: CGSize) -> (ChatMessageBubbleContentProperties, CGSize?, CGFloat, (CGSize, ChatMessageBubbleContentPosition) -> (CGFloat, (CGFloat) -> (CGSize, (ListViewItemUpdateAnimation, Bool) -> Void))) {
        let statusLayout = self.dateAndStatusNode.asyncLayout()
        let makeTitleLayout = TextNode.asyncLayout(self.titleNode)
        let makeTextLayout = TextNode.asyncLayout(self.textNode)
        let makeButtonLayout = ChatMessageAttachedContentButtonNode.asyncLayout(self.buttonNode)
        
        let previousContact = self.contact
        let previousContactInfo = self.contactInfo
        
        return { item, layoutConstants, _, _, constrainedSize in
            var selectedContact: TelegramMediaContact?
            for media in item.message.media {
                if let media = media as? TelegramMediaContact {
                    selectedContact = media
                }
            }
            
            var titleString: NSAttributedString?
            var textString: NSAttributedString?
            var updatedContactInfo: String?
            
            var displayName: String = ""
            if let selectedContact = selectedContact {
                if !selectedContact.firstName.isEmpty && !selectedContact.lastName.isEmpty {
                    displayName = "\(selectedContact.firstName) \(selectedContact.lastName)"
                } else if !selectedContact.firstName.isEmpty {
                    displayName = selectedContact.firstName
                } else {
                    displayName = selectedContact.lastName
                }
                if displayName.isEmpty {
                    displayName = item.presentationData.strings.Message_Contact
                }
                
                let info: String
                if let previousContact = previousContact, previousContact.isEqual(to: selectedContact), let contactInfo = previousContactInfo {
                    info = contactInfo
                } else {
                    if let vCard = selectedContact.vCardData, let vCardData = vCard.data(using: .utf8), let contactData = DeviceContactExtendedData(vcard: vCardData) {
                        if displayName.isEmpty && !contactData.organization.isEmpty {
                            displayName = contactData.organization
                        }
                        
                        let infoLineLimit = 5
                        var infoComponents: [String] = []
                        if !contactData.basicData.phoneNumbers.isEmpty {
                            for phone in contactData.basicData.phoneNumbers {
                                if infoComponents.count < infoLineLimit {
                                    infoComponents.append(formatPhoneNumber(phone.value))
                                }
                            }
                        } else {
                             infoComponents.append(formatPhoneNumber(selectedContact.phoneNumber))
                        }
                        if infoComponents.count < infoLineLimit {
                            for email in contactData.emailAddresses {
                                if infoComponents.count < infoLineLimit {
                                    infoComponents.append(email.value)
                                }
                            }
                        }
                        if infoComponents.count < infoLineLimit {
                            if !contactData.organization.isEmpty && displayName != contactData.organization {
                                infoComponents.append(contactData.organization)
                            }
                        }
                        info = infoComponents.joined(separator: "\n")
                    } else {
                        info = formatPhoneNumber(selectedContact.phoneNumber)
                    }
                }
                
                updatedContactInfo = info
                
                titleString = NSAttributedString(string: displayName, font: titleFont, textColor: item.message.effectivelyIncoming(item.context.account.peerId) ? item.presentationData.theme.theme.chat.message.incoming.accentTextColor : item.presentationData.theme.theme.chat.message.outgoing.accentTextColor)
                textString = NSAttributedString(string: info, font: textFont, textColor: item.message.effectivelyIncoming(item.context.account.peerId) ? item.presentationData.theme.theme.chat.message.incoming.primaryTextColor : item.presentationData.theme.theme.chat.message.outgoing.primaryTextColor)
            } else {
                updatedContactInfo = nil
            }
            
            let contentProperties = ChatMessageBubbleContentProperties(hidesSimpleAuthorHeader: false, headerSpacing: 0.0, hidesBackground: .never, forceFullCorners: false, forceAlignment: .none)
            
            return (contentProperties, nil, CGFloat.greatestFiniteMagnitude, { constrainedSize, position in
                let avatarSize = CGSize(width: 40.0, height: 40.0)
                
                let maxTextWidth = max(1.0, constrainedSize.width - avatarSize.width - layoutConstants.text.bubbleInsets.left - layoutConstants.text.bubbleInsets.right)
                let (titleLayout, titleApply) = makeTitleLayout(TextNodeLayoutArguments(attributedString: titleString, backgroundColor: nil, maximumNumberOfLines: 1, truncationType: .end, constrainedSize: CGSize(width: maxTextWidth, height: CGFloat.greatestFiniteMagnitude), alignment: .natural, cutout: nil, insets: UIEdgeInsets()))
                let (textLayout, textApply) = makeTextLayout(TextNodeLayoutArguments(attributedString: textString, backgroundColor: nil, maximumNumberOfLines: 5, truncationType: .end, constrainedSize: CGSize(width: maxTextWidth, height: CGFloat.greatestFiniteMagnitude), alignment: .natural, cutout: nil, insets: UIEdgeInsets()))
                
                var edited = false
                if item.attributes.updatingMedia != nil {
                    edited = true
                }
                var viewCount: Int?
                var dateReplies = 0
                let dateReactions: [MessageReaction] = []
                for attribute in item.message.attributes {
                    if let attribute = attribute as? EditedMessageAttribute {
                        edited = !attribute.isHidden
                    } else if let attribute = attribute as? ViewCountMessageAttribute {
                        viewCount = attribute.count
                    } else if let attribute = attribute as? ReplyThreadMessageAttribute, case .peer = item.chatLocation {
                        if let channel = item.message.peers[item.message.id.peerId] as? TelegramChannel, case .group = channel.info {
                            dateReplies = Int(attribute.count)
                        }
                    }
                }
                
                let dateText = stringForMessageTimestampStatus(accountPeerId: item.context.account.peerId, message: item.message, dateTimeFormat: item.presentationData.dateTimeFormat, nameDisplayOrder: item.presentationData.nameDisplayOrder, strings: item.presentationData.strings)
                
                let statusType: ChatMessageDateAndStatusType?
                switch position {
                    case .linear(_, .None), .linear(_, .Neighbour(true, _, _)):
                        if item.message.effectivelyIncoming(item.context.account.peerId) {
                            statusType = .BubbleIncoming
                        } else {
                            if item.message.flags.contains(.Failed) {
                                statusType = .BubbleOutgoing(.Failed)
                            } else if (item.message.flags.isSending && !item.message.isSentOrAcknowledged) || item.attributes.updatingMedia != nil {
                                statusType = .BubbleOutgoing(.Sending)
                            } else {
                                statusType = .BubbleOutgoing(.Sent(read: item.read))
                            }
                        }
                    default:
                        statusType = nil
                }
                
                var statusSize = CGSize()
                var statusApply: ((Bool) -> Void)?
                
                if let statusType = statusType {
                    var isReplyThread = false
                    if case .replyThread = item.chatLocation {
                        isReplyThread = true
                    }
                    
                    let (size, apply) = statusLayout(item.context, item.presentationData, edited, viewCount, dateText, statusType, CGSize(width: constrainedSize.width, height: CGFloat.greatestFiniteMagnitude), dateReactions, dateReplies, item.message.tags.contains(.pinned) && !item.associatedData.isInPinnedListMode && !isReplyThread, item.message.isSelfExpiring)
                    statusSize = size
                    statusApply = apply
                }
                
                let buttonImage: UIImage
                let buttonHighlightedImage: UIImage
                let titleColor: UIColor
                let titleHighlightedColor: UIColor
                let avatarPlaceholderColor: UIColor
                if item.message.effectivelyIncoming(item.context.account.peerId) {
                    buttonImage = PresentationResourcesChat.chatMessageAttachedContentButtonIncoming(item.presentationData.theme.theme)!
                    buttonHighlightedImage = PresentationResourcesChat.chatMessageAttachedContentHighlightedButtonIncoming(item.presentationData.theme.theme)!
                    titleColor = item.presentationData.theme.theme.chat.message.incoming.accentTextColor
                    
                    let bubbleColors = bubbleColorComponents(theme: item.presentationData.theme.theme, incoming: true, wallpaper: !item.presentationData.theme.wallpaper.isEmpty)
                    titleHighlightedColor = bubbleColors.fill[0]
                    avatarPlaceholderColor = item.presentationData.theme.theme.chat.message.incoming.mediaPlaceholderColor
                } else {
                    buttonImage = PresentationResourcesChat.chatMessageAttachedContentButtonOutgoing(item.presentationData.theme.theme)!
                    buttonHighlightedImage = PresentationResourcesChat.chatMessageAttachedContentHighlightedButtonOutgoing(item.presentationData.theme.theme)!
                    titleColor = item.presentationData.theme.theme.chat.message.outgoing.accentTextColor
                    
                    let bubbleColors = bubbleColorComponents(theme: item.presentationData.theme.theme, incoming: false, wallpaper: !item.presentationData.theme.wallpaper.isEmpty)
                    titleHighlightedColor = bubbleColors.fill[0]
                    avatarPlaceholderColor = item.presentationData.theme.theme.chat.message.outgoing.mediaPlaceholderColor
                }
                
                let (buttonWidth, continueLayout) = makeButtonLayout(constrainedSize.width, buttonImage, buttonHighlightedImage, nil, nil, item.presentationData.strings.Conversation_ViewContactDetails, titleColor, titleHighlightedColor)
                
                var maxContentWidth: CGFloat = 0.0
                maxContentWidth = max(maxContentWidth, statusSize.width)
                maxContentWidth = max(maxContentWidth, titleLayout.size.width)
                maxContentWidth = max(maxContentWidth, textLayout.size.width)
                maxContentWidth = max(maxContentWidth, buttonWidth)
                
                let contentWidth = avatarSize.width + maxContentWidth +  layoutConstants.text.bubbleInsets.right + 8.0
                
                return (contentWidth, { boundingWidth in
                    let layoutSize: CGSize
                    let statusFrame: CGRect
                    
                    let baseAvatarFrame = CGRect(origin: CGPoint(), size: avatarSize)
                    
                    let (buttonSize, buttonApply) = continueLayout(boundingWidth - layoutConstants.text.bubbleInsets.right * 2.0)
                    let buttonSpacing: CGFloat = 4.0
                    
                    layoutSize = CGSize(width: contentWidth, height: 49.0 + textLayout.size.height + buttonSize.height + buttonSpacing)
                    statusFrame = CGRect(origin: CGPoint(x: boundingWidth - statusSize.width - layoutConstants.text.bubbleInsets.right, y: layoutSize.height - statusSize.height - 9.0 - buttonSpacing - buttonSize.height), size: statusSize)
                    let buttonFrame = CGRect(origin: CGPoint(x: layoutConstants.text.bubbleInsets.right, y: layoutSize.height - 9.0 - buttonSize.height), size: buttonSize)
                    let avatarFrame = baseAvatarFrame.offsetBy(dx: 5.0, dy: 5.0)
                    
                    var customLetters: [String] = []
                    if let selectedContact = selectedContact, selectedContact.peerId == nil {
                        let firstName = selectedContact.firstName
                        let lastName = selectedContact.lastName
                        if !firstName.isEmpty && !lastName.isEmpty {
                            customLetters = [String(firstName[..<firstName.index(after: firstName.startIndex)]).uppercased(), String(lastName[..<lastName.index(after: lastName.startIndex)]).uppercased()]
                        } else if !firstName.isEmpty {
                            customLetters = [String(firstName[..<firstName.index(after: firstName.startIndex)]).uppercased()]
                        } else if !lastName.isEmpty {
                            customLetters = [String(lastName[..<lastName.index(after: lastName.startIndex)]).uppercased()]
                        } else if !displayName.isEmpty {
                            customLetters = [String(displayName[..<displayName.index(after: displayName.startIndex)]).uppercased()]
                        }
                    }
                    
                    return (layoutSize, { [weak self] animation, synchronousLoads in
                        if let strongSelf = self {
                            strongSelf.item = item
                            strongSelf.contact = selectedContact
                            strongSelf.contactInfo = updatedContactInfo
                            
                            strongSelf.avatarNode.frame = avatarFrame
                            
                            let _ = titleApply()
                            let _ = textApply()
                            let _ = buttonApply()
                            
                            strongSelf.titleNode.frame = CGRect(origin: CGPoint(x: avatarFrame.maxX + 7.0, y: avatarFrame.minY + 1.0), size: titleLayout.size)
                            strongSelf.textNode.frame = CGRect(origin: CGPoint(x: avatarFrame.maxX + 7.0, y: avatarFrame.minY + 20.0), size: textLayout.size)
                            strongSelf.buttonNode.frame = buttonFrame
                            
                            if let statusApply = statusApply {
                                if strongSelf.dateAndStatusNode.supernode == nil {
                                    strongSelf.addSubnode(strongSelf.dateAndStatusNode)
                                }
                                var hasAnimation = true
                                if case .None = animation {
                                    hasAnimation = false
                                }
                                statusApply(hasAnimation)
                                strongSelf.dateAndStatusNode.frame = statusFrame
                            } else if strongSelf.dateAndStatusNode.supernode != nil {
                                strongSelf.dateAndStatusNode.removeFromSupernode()
                            }
                            
                            if let _ = titleString {
                                if strongSelf.titleNode.supernode == nil {
                                    strongSelf.addSubnode(strongSelf.titleNode)
                                }
                                if strongSelf.textNode.supernode == nil {
                                    strongSelf.addSubnode(strongSelf.textNode)
                                }
                            } else {
                                if strongSelf.titleNode.supernode != nil {
                                    strongSelf.titleNode.removeFromSupernode()
                                }
                                if strongSelf.textNode.supernode != nil {
                                    strongSelf.textNode.removeFromSupernode()
                                }
                            }
                            
                            if let peerId = selectedContact?.peerId, let peer = item.message.peers[peerId] {
                                strongSelf.avatarNode.setPeer(context: item.context, theme: item.presentationData.theme.theme, peer: EnginePeer(peer), emptyColor: avatarPlaceholderColor, synchronousLoad: synchronousLoads)
                            } else {
                                strongSelf.avatarNode.setCustomLetters(customLetters)
                            }
                            
                            if let forwardInfo = item.message.forwardInfo, forwardInfo.flags.contains(.isImported) {
                                strongSelf.dateAndStatusNode.pressed = {
                                    guard let strongSelf = self else {
                                        return
                                    }
                                    item.controllerInteraction.displayImportedMessageTooltip(strongSelf.dateAndStatusNode)
                                }
                            } else {
                                strongSelf.dateAndStatusNode.pressed = nil
                            }
                        }
                    })
                })
            })
        }
    }
    
    override func animateInsertion(_ currentTimestamp: Double, duration: Double) {
        self.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.2)
    }
    
    override func animateAdded(_ currentTimestamp: Double, duration: Double) {
        self.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.2)
    }
    
    override func animateRemoved(_ currentTimestamp: Double, duration: Double) {
        self.layer.animateAlpha(from: 1.0, to: 0.0, duration: 0.2, removeOnCompletion: false)
    }
    
    override func tapActionAtPoint(_ point: CGPoint, gesture: TapLongTapOrDoubleTapGesture, isEstimating: Bool) -> ChatMessageBubbleContentTapAction {
        if self.buttonNode.frame.contains(point) {
            return .openMessage
        }
        return .none
    }
    
    @objc func contactTap(_ recognizer: UITapGestureRecognizer) {
        if case .ended = recognizer.state {
            if let item = self.item {
                let _ = item.controllerInteraction.openMessage(item.message, .default)
            }
        }
    }
    
    @objc private func buttonPressed() {
        if let item = self.item {
            let _ = item.controllerInteraction.openMessage(item.message, .default)
        }
    }
}