import Foundation
import UIKit
import Display
import Postbox
import AsyncDisplayKit
import TelegramCore
import SyncCore
import SwiftSignalKit
import TelegramPresentationData
import TelegramStringFormatting
import PeerOnlineMarkerNode
import SelectablePeerNode
import ContextUI
import AccountContext

public enum HorizontalPeerItemMode {
    case list
    case actionSheet
}

private let badgeFont = Font.regular(14.0)

public final class HorizontalPeerItem: ListViewItem {
    let theme: PresentationTheme
    let strings: PresentationStrings
    let mode: HorizontalPeerItemMode
    let context: AccountContext
    public let peer: Peer
    let action: (Peer) -> Void
    let contextAction: (Peer, ASDisplayNode, ContextGesture?) -> Void
    let isPeerSelected: (PeerId) -> Bool
    let customWidth: CGFloat?
    let presence: PeerPresence?
    let unreadBadge: (Int32, Bool)?
    
    public init(theme: PresentationTheme, strings: PresentationStrings, mode: HorizontalPeerItemMode, context: AccountContext, peer: Peer, presence: PeerPresence?, unreadBadge: (Int32, Bool)?, action: @escaping (Peer) -> Void, contextAction: @escaping (Peer, ASDisplayNode, ContextGesture?) -> Void, isPeerSelected: @escaping (PeerId) -> Bool, customWidth: CGFloat?) {
        self.theme = theme
        self.strings = strings
        self.mode = mode
        self.context = context
        self.peer = peer
        self.action = action
        self.contextAction = contextAction
        self.isPeerSelected = isPeerSelected
        self.customWidth = customWidth
        self.presence = presence
        self.unreadBadge = unreadBadge
    }
    
    public func nodeConfiguredForParams(async: @escaping (@escaping () -> Void) -> Void, params: ListViewItemLayoutParams, synchronousLoads: Bool, previousItem: ListViewItem?, nextItem: ListViewItem?, completion: @escaping (ListViewItemNode, @escaping () -> (Signal<Void, NoError>?, (ListViewItemApply) -> Void)) -> Void) {
        async {
            let node = HorizontalPeerItemNode()
            let (nodeLayout, apply) = node.asyncLayout()(self, params)
            node.insets = nodeLayout.insets
            node.contentSize = nodeLayout.contentSize
            
            Queue.mainQueue().async {
                completion(node, {
                    return (nil, { _ in
                        apply(false, synchronousLoads)
                    })
                })
            }
        }
    }
    
    public func updateNode(async: @escaping (@escaping () -> Void) -> Void, node: @escaping () -> ListViewItemNode, params: ListViewItemLayoutParams, previousItem: ListViewItem?, nextItem: ListViewItem?, animation: ListViewItemUpdateAnimation, completion: @escaping (ListViewItemNodeLayout, @escaping (ListViewItemApply) -> Void) -> Void) {
        Queue.mainQueue().async {
            assert(node() is HorizontalPeerItemNode)
            if let nodeValue = node() as? HorizontalPeerItemNode {
                let layout = nodeValue.asyncLayout()
                async {
                    let (nodeLayout, apply) = layout(self, params)
                    Queue.mainQueue().async {
                        completion(nodeLayout, { _ in
                            apply(animation.isAnimated, false)
                        })
                    }
                }
            }
        }
    }
}

public final class HorizontalPeerItemNode: ListViewItemNode {
    private(set) var peerNode: SelectablePeerNode
    let badgeBackgroundNode: ASImageNode
    let badgeTextNode: TextNode
    let onlineNode: PeerOnlineMarkerNode
    public private(set) var item: HorizontalPeerItem?
    
    public init() {
        self.peerNode = SelectablePeerNode()
        self.badgeBackgroundNode = ASImageNode()
        self.badgeBackgroundNode.isLayerBacked = true
        self.badgeBackgroundNode.displaysAsynchronously = false
        self.badgeBackgroundNode.displayWithoutProcessing = true
        
        self.badgeTextNode = TextNode()
        self.badgeTextNode.isUserInteractionEnabled = false
        self.badgeTextNode.displaysAsynchronously = true
        
        self.onlineNode = PeerOnlineMarkerNode()
        
        super.init(layerBacked: false, dynamicBounce: false)
        
        self.addSubnode(self.peerNode)
        self.addSubnode(self.badgeBackgroundNode)
        self.addSubnode(self.badgeTextNode)
        self.addSubnode(self.onlineNode)
        self.peerNode.toggleSelection = { [weak self] in
            if let item = self?.item {
                item.action(item.peer)
            }
        }
        self.peerNode.contextAction = { [weak self] node, gesture in
            if let item = self?.item {
                item.contextAction(item.peer, node, gesture)
            }
        }
    }
    
    override public func didLoad() {
        super.didLoad()
        
        self.layer.sublayerTransform = CATransform3DMakeRotation(CGFloat.pi / 2.0, 0.0, 0.0, 1.0)
    }
    
    public func asyncLayout() -> (HorizontalPeerItem, ListViewItemLayoutParams) -> (ListViewItemNodeLayout, (Bool, Bool) -> Void) {
        let badgeTextLayout = TextNode.asyncLayout(self.badgeTextNode)
        let onlineLayout = self.onlineNode.asyncLayout()
        
        let currentItem = self.item

        return { [weak self] item, params in
            let itemLayout = ListViewItemNodeLayout(contentSize: CGSize(width: 92.0, height: item.customWidth ?? 80.0), insets: UIEdgeInsets())
            
            let itemTheme: SelectablePeerNodeTheme
            switch item.mode {
                case .list:
                    itemTheme = SelectablePeerNodeTheme(textColor: item.theme.list.itemPrimaryTextColor, secretTextColor: item.theme.chatList.secretTitleColor, selectedTextColor: item.theme.list.itemAccentColor, checkBackgroundColor: item.theme.list.plainBackgroundColor, checkFillColor: item.theme.list.itemAccentColor, checkColor: item.theme.list.plainBackgroundColor, avatarPlaceholderColor: item.theme.list.mediaPlaceholderColor)
                case .actionSheet:
                    itemTheme = SelectablePeerNodeTheme(textColor: item.theme.actionSheet.primaryTextColor, secretTextColor: item.theme.chatList.secretTitleColor, selectedTextColor: item.theme.actionSheet.controlAccentColor, checkBackgroundColor: item.theme.actionSheet.opaqueItemBackgroundColor, checkFillColor: item.theme.actionSheet.controlAccentColor, checkColor: item.theme.actionSheet.opaqueItemBackgroundColor, avatarPlaceholderColor: item.theme.list.mediaPlaceholderColor)
            }
            let currentBadgeBackgroundImage: UIImage?
            let badgeAttributedString: NSAttributedString
            if let unreadBadge = item.unreadBadge {
                let badgeTextColor: UIColor
                let (unreadCount, isMuted) = unreadBadge
                if isMuted {
                    currentBadgeBackgroundImage = PresentationResourcesChatList.badgeBackgroundInactive(item.theme, diameter: 20.0)
                    badgeTextColor = item.theme.chatList.unreadBadgeInactiveTextColor
                } else {
                    currentBadgeBackgroundImage = PresentationResourcesChatList.badgeBackgroundActive(item.theme, diameter: 20.0)
                    badgeTextColor = item.theme.chatList.unreadBadgeActiveTextColor
                }
                badgeAttributedString = NSAttributedString(string: unreadCount > 0 ? "\(unreadCount)" : " ", font: badgeFont, textColor: badgeTextColor)
                
               
            } else {
                currentBadgeBackgroundImage = nil
                badgeAttributedString = NSAttributedString()
            }
            
            var online = false
            let timestamp = CFAbsoluteTimeGetCurrent() + NSTimeIntervalSince1970
            if let peer = item.peer as? TelegramUser, let presence = item.presence as? TelegramUserPresence, !isServicePeer(peer) && !peer.flags.contains(.isSupport) {
                let relativeStatus = relativeUserPresenceStatus(presence, relativeTo: Int32(timestamp))
                if case .online = relativeStatus {
                    online = true
                }
            }
            
            let (badgeLayout, badgeApply) = badgeTextLayout(TextNodeLayoutArguments(attributedString: badgeAttributedString, backgroundColor: nil, maximumNumberOfLines: 1, truncationType: .end, constrainedSize: CGSize(width: 50.0, height: CGFloat.greatestFiniteMagnitude), alignment: .natural, cutout: nil, insets: UIEdgeInsets()))
            
            var badgeSize: CGFloat = 0.0
            if let currentBadgeBackgroundImage = currentBadgeBackgroundImage {
                badgeSize += max(currentBadgeBackgroundImage.size.width, badgeLayout.size.width + 10.0) + 5.0
            }
            
            let (onlineLayout, onlineApply) = onlineLayout(online, false)
            var animateContent = false
            if let currentItem = currentItem, currentItem.peer.id == item.peer.id {
                animateContent = true
            }
            
            return (itemLayout, { animated, synchronousLoads in
                if let strongSelf = self {
                    strongSelf.item = item
                    strongSelf.peerNode.theme = itemTheme
                    strongSelf.peerNode.setup(context: item.context, theme: item.theme, strings: item.strings, peer: RenderedPeer(peer: item.peer), numberOfLines: 1, synchronousLoad: synchronousLoads)
                    strongSelf.peerNode.frame = CGRect(origin: CGPoint(), size: itemLayout.size)
                    strongSelf.peerNode.updateSelection(selected: item.isPeerSelected(item.peer.id), animated: false)
                    
                    let badgeBackgroundWidth: CGFloat
                    if let currentBadgeBackgroundImage = currentBadgeBackgroundImage {
                        strongSelf.badgeBackgroundNode.image = currentBadgeBackgroundImage
                        strongSelf.badgeBackgroundNode.isHidden = false
                        
                        badgeBackgroundWidth = max(badgeLayout.size.width + 10.0, currentBadgeBackgroundImage.size.width)
                        let badgeBackgroundFrame = CGRect(x: itemLayout.size.width - floorToScreenPixels(badgeBackgroundWidth * 1.8), y: 2.0, width: badgeBackgroundWidth, height: currentBadgeBackgroundImage.size.height)
                        let badgeTextFrame = CGRect(origin: CGPoint(x: badgeBackgroundFrame.midX - badgeLayout.size.width / 2.0, y: badgeBackgroundFrame.minY + 2.0), size: badgeLayout.size)
                        
                        strongSelf.badgeTextNode.frame = badgeTextFrame
                        strongSelf.badgeBackgroundNode.frame = badgeBackgroundFrame
                    } else {
                        badgeBackgroundWidth = 0.0
                        strongSelf.badgeBackgroundNode.image = nil
                        strongSelf.badgeBackgroundNode.isHidden = true
                    }
                    
                    strongSelf.onlineNode.setImage(PresentationResourcesChatList.recentStatusOnlineIcon(item.theme, state: .regular), color: nil, transition: .immediate)
                    strongSelf.onlineNode.frame = CGRect(x: itemLayout.size.width - onlineLayout.width - 18.0, y: itemLayout.size.height - onlineLayout.height - 18.0, width: onlineLayout.width, height: onlineLayout.height)
                    
                    let _ = badgeApply()
                    let _ = onlineApply(animateContent)
                }
            })
        }
    }
    
    public func updateSelection(animated: Bool) {
        if let item = self.item {
            self.peerNode.updateSelection(selected: item.isPeerSelected(item.peer.id), animated: animated)
        }
    }
    
    override public func animateInsertion(_ currentTimestamp: Double, duration: Double, short: Bool) {
        super.animateInsertion(currentTimestamp, duration: duration, short: short)
        
        self.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.2)
    }
    
    override public func animateRemoved(_ currentTimestamp: Double, duration: Double) {
        super.animateRemoved(currentTimestamp, duration: duration)
        
        self.layer.animateAlpha(from: 1.0, to: 0.0, duration: 0.2, removeOnCompletion: false)
    }
    
    override public func animateAdded(_ currentTimestamp: Double, duration: Double) {
        super.animateAdded(currentTimestamp, duration: duration)
        
        self.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.2)
    }
}