import Foundation
import UIKit
import Display
import AsyncDisplayKit
import Postbox
import TelegramCore
import TelegramPresentationData
import LocalizedPeerData
import TelegramStringFormatting
import TelegramNotices
import AnimatedAvatarSetNode
import AccountContext
import ChatPresentationInterfaceState
import LegacyChatHeaderPanelComponent

private final class ChatInfoTitlePanelPeerNearbyInfoNode: ASDisplayNode {
    private var theme: PresentationTheme?
    
    private let labelNode: ImmediateTextNode
    private let filledBackgroundNode: LinkHighlightingNode
    
    private let openPeersNearby: () -> Void
    
    init(openPeersNearby: @escaping () -> Void) {
        self.openPeersNearby = openPeersNearby
        
        self.labelNode = ImmediateTextNode()
        self.labelNode.maximumNumberOfLines = 1
        self.labelNode.textAlignment = .center
        
        self.filledBackgroundNode = LinkHighlightingNode(color: .clear)
        
        super.init()
        
        self.addSubnode(self.filledBackgroundNode)
        self.addSubnode(self.labelNode)
    }
    
    override func didLoad() {
        super.didLoad()
        
        let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.tapGesture(_:)))
        self.view.addGestureRecognizer(tapRecognizer)
    }
    
    @objc private func tapGesture(_ gestureRecognizer: UITapGestureRecognizer) {
        self.openPeersNearby()
    }
    
    func update(width: CGFloat, theme: PresentationTheme, strings: PresentationStrings, wallpaper: TelegramWallpaper, chatPeer: Peer, distance: Int32, transition: ContainedViewLayoutTransition) -> CGFloat {
        let primaryTextColor = serviceMessageColorComponents(theme: theme, wallpaper: wallpaper).primaryText
        
        if self.theme !== theme {
            self.theme = theme
            
            self.labelNode.linkHighlightColor = primaryTextColor.withAlphaComponent(0.3)
        }
        
        let topInset: CGFloat = 6.0
        let bottomInset: CGFloat = 6.0
        let sideInset: CGFloat = 16.0
        
        let stringAndRanges = strings.Conversation_PeerNearbyDistance(EnginePeer(chatPeer).compactDisplayTitle, shortStringForDistance(strings: strings, distance: distance))
        
        let attributedString = NSMutableAttributedString(string: stringAndRanges.string, font: Font.regular(13.0), textColor: primaryTextColor)
        
        let boldAttributes = [NSAttributedString.Key.font: Font.semibold(13.0), NSAttributedString.Key(rawValue: "_Link"): true as NSNumber]
        for range in stringAndRanges.ranges.prefix(1) {
            attributedString.addAttributes(boldAttributes, range: range.range)
        }
        
        self.labelNode.attributedText = attributedString
        let labelLayout = self.labelNode.updateLayoutFullInfo(CGSize(width: width - sideInset * 2.0, height: CGFloat.greatestFiniteMagnitude))
        
        var labelRects = labelLayout.linesRects()
        if labelRects.count > 1 {
            let sortedIndices = (0 ..< labelRects.count).sorted(by: { labelRects[$0].width > labelRects[$1].width })
            for i in 0 ..< sortedIndices.count {
                let index = sortedIndices[i]
                for j in -1 ... 1 {
                    if j != 0 && index + j >= 0 && index + j < sortedIndices.count {
                        if abs(labelRects[index + j].width - labelRects[index].width) < 40.0 {
                            labelRects[index + j].size.width = max(labelRects[index + j].width, labelRects[index].width)
                            labelRects[index].size.width = labelRects[index + j].size.width
                        }
                    }
                }
            }
        }
        for i in 0 ..< labelRects.count {
            labelRects[i] = labelRects[i].insetBy(dx: -6.0, dy: floor((labelRects[i].height - 20.0) / 2.0))
            labelRects[i].size.height = 20.0
            labelRects[i].origin.x = floor((labelLayout.size.width - labelRects[i].width) / 2.0)
        }
        
        let backgroundLayout = self.filledBackgroundNode.asyncLayout()
        let serviceColor = serviceMessageColorComponents(theme: theme, wallpaper: wallpaper)
        let backgroundApply = backgroundLayout(serviceColor.fill, labelRects, 10.0, 10.0, 0.0)
        backgroundApply()
        
        let backgroundSize = CGSize(width: labelLayout.size.width + 8.0 + 8.0, height: labelLayout.size.height + 4.0)
        
        let labelFrame = CGRect(origin: CGPoint(x: floor((width - labelLayout.size.width) / 2.0), y: topInset + floorToScreenPixels((backgroundSize.height - labelLayout.size.height) / 2.0) - 1.0), size: labelLayout.size)
        self.labelNode.frame = labelFrame
        self.filledBackgroundNode.frame = labelFrame.offsetBy(dx: 0.0, dy: -11.0)
        
        return topInset + backgroundSize.height + bottomInset
    }
}

final class ChatInviteRequestsTitlePanelNode: ChatTitleAccessoryPanelNode {
    private final class Params {
        let width: CGFloat
        let leftInset: CGFloat
        let rightInset: CGFloat
        let interfaceState: ChatPresentationInterfaceState

        init(width: CGFloat, leftInset: CGFloat, rightInset: CGFloat, interfaceState: ChatPresentationInterfaceState) {
            self.width = width
            self.leftInset = leftInset
            self.rightInset = rightInset
            self.interfaceState = interfaceState
        }
    }
    
    private let context: AccountContext
    
    private let separatorNode: ASDisplayNode
    
    private let closeButton: HighlightableButtonNode
    private let button: HighlightableButtonNode
    private let buttonTitle: ImmediateTextNode
    
    private let avatarsContext: AnimatedAvatarSetContext
    private var avatarsContent: AnimatedAvatarSetContext.Content?
    private let avatarsNode: AnimatedAvatarSetNode
    
    private let activateAreaNode: AccessibilityAreaNode
    
    private var theme: PresentationTheme?
    
    private var peerId: PeerId?
    private var peers: [EnginePeer] = []
    private var count: Int32 = 0
    
    private var params: Params?
    
    init(context: AccountContext) {
        self.context = context
        
        self.separatorNode = ASDisplayNode()
        self.separatorNode.isLayerBacked = true
        
        self.closeButton = HighlightableButtonNode()
        self.closeButton.hitTestSlop = UIEdgeInsets(top: -8.0, left: -8.0, bottom: -8.0, right: -8.0)
        self.closeButton.displaysAsynchronously = false
        
        self.button = HighlightableButtonNode()
        self.buttonTitle = ImmediateTextNode()
        self.buttonTitle.anchorPoint = CGPoint()
        
        self.avatarsContext = AnimatedAvatarSetContext()
        self.avatarsNode = AnimatedAvatarSetNode()
        
        self.activateAreaNode = AccessibilityAreaNode()
        self.activateAreaNode.accessibilityTraits = .button
        
        super.init()

        self.addSubnode(self.separatorNode)
        
        self.closeButton.addTarget(self, action: #selector(self.closePressed), forControlEvents: [.touchUpInside])
        self.addSubnode(self.closeButton)
        
        self.button.addTarget(self, action: #selector(self.buttonPressed), forControlEvents: .touchUpInside)
        self.addSubnode(self.button)
        
        self.buttonTitle.isUserInteractionEnabled = false
        self.button.addSubnode(self.buttonTitle)
        
        self.addSubnode(self.avatarsNode)
        
        self.addSubnode(self.activateAreaNode)
    }
    

    func update(peerId: PeerId, peers: [EnginePeer], count: Int32) {
        self.peerId = peerId
        self.peers = peers
        self.count = count
        
        self.avatarsContent = self.avatarsContext.update(peers: peers, animated: false)
        
        if let params = self.params {
            let _ = self.updateLayout(width: params.width, leftInset: params.leftInset, rightInset: params.rightInset, transition: .immediate, interfaceState: params.interfaceState)
        }
    }
    
    override func updateLayout(width: CGFloat, leftInset: CGFloat, rightInset: CGFloat, transition: ContainedViewLayoutTransition, interfaceState: ChatPresentationInterfaceState) -> LayoutResult {
        self.params = Params(width: width, leftInset: leftInset, rightInset: rightInset, interfaceState: interfaceState)
        
        if interfaceState.theme !== self.theme {
            self.theme = interfaceState.theme
            
            self.closeButton.setImage(PresentationResourcesChat.chatInputPanelEncircledCloseIconImage(interfaceState.theme), for: [])
            self.separatorNode.backgroundColor = interfaceState.theme.rootController.navigationBar.separatorColor
        }

        let panelHeight: CGFloat = 40.0
        
        let contentRightInset: CGFloat = 14.0 + rightInset
        
        let closeButtonSize = self.closeButton.measure(CGSize(width: 100.0, height: 100.0))
        transition.updateFrame(node: self.closeButton, frame: CGRect(origin: CGPoint(x: width - contentRightInset - closeButtonSize.width, y: floorToScreenPixels((panelHeight - closeButtonSize.height) / 2.0)), size: closeButtonSize))
        
        self.buttonTitle.attributedText = NSAttributedString(string: interfaceState.strings.Conversation_RequestsToJoin(self.count), font: Font.regular(16.0), textColor: interfaceState.theme.rootController.navigationBar.accentTextColor)
        
        transition.updateFrame(node: self.button, frame: CGRect(origin: CGPoint(x: 0.0, y: 0.0), size: CGSize(width: width, height: panelHeight)))
        
        let titleSize = self.buttonTitle.updateLayout(CGSize(width: width - leftInset - 90.0 - contentRightInset, height: 100.0))
        var buttonTitleFrame = CGRect(origin: CGPoint(x: leftInset + floor((width - leftInset - titleSize.width) * 0.5), y: floor((panelHeight - titleSize.height) * 0.5)), size: titleSize)
        buttonTitleFrame.origin.x = max(buttonTitleFrame.minX, leftInset + 90.0)
        transition.updatePosition(node: self.buttonTitle, position: buttonTitleFrame.origin)
        self.buttonTitle.bounds = CGRect(origin: CGPoint(), size: buttonTitleFrame.size)
        
        let initialPanelHeight = panelHeight
        transition.updateFrame(node: self.separatorNode, frame: CGRect(origin: CGPoint(x: 0.0, y: 0.0), size: CGSize(width: width, height: UIScreenPixel)))
        
        if let avatarsContent = self.avatarsContent {
            let avatarsSize = self.avatarsNode.update(context: self.context, content: avatarsContent, itemSize: CGSize(width: 32.0, height: 32.0), animated: true, synchronousLoad: true)
            transition.updateFrame(node: self.avatarsNode, frame: CGRect(origin: CGPoint(x: leftInset + 8.0, y: floor((panelHeight - avatarsSize.height) / 2.0)), size: avatarsSize))
        }
        
        self.activateAreaNode.frame = CGRect(origin: .zero, size: CGSize(width: width, height: panelHeight))
        self.activateAreaNode.accessibilityLabel = interfaceState.strings.Conversation_RequestsToJoin(self.count)
        
        return LayoutResult(backgroundHeight: initialPanelHeight, insetHeight: panelHeight, hitTestSlop: 0.0)
    }
    
    @objc func buttonPressed() {
        self.interfaceInteraction?.openInviteRequests()
    }
    
    @objc func closePressed() {
        guard let peerId = self.peerId else {
            return
        }

        let ids = peers.map { $0.id.toInt64() }
        let _ = ApplicationSpecificNotice.setDismissedInvitationRequests(accountManager: context.sharedContext.accountManager, peerId: peerId, values: ids).startStandalone()
    }
    
    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        if let result = self.closeButton.hitTest(CGPoint(x: point.x - self.closeButton.frame.minX, y: point.y - self.closeButton.frame.minY), with: event) {
            return result
        }
        return super.hitTest(point, with: event)
    }
}