import Foundation
import UIKit
import Display
import AsyncDisplayKit
import SwiftSignalKit
import Postbox
import TelegramCore
import TelegramPresentationData
import TelegramUIPreferences
import ItemListUI
import PresentationDataUtils
import AvatarNode
import TelegramStringFormatting
import LocalizedPeerData

struct ItemListWebsiteItemEditing: Equatable {
    let editing: Bool
    let revealed: Bool
    
    static func ==(lhs: ItemListWebsiteItemEditing, rhs: ItemListWebsiteItemEditing) -> Bool {
        if lhs.editing != rhs.editing {
            return false
        }
        if lhs.revealed != rhs.revealed {
            return false
        }
        return true
    }
}

final class ItemListWebsiteItem: ListViewItem, ItemListItem {
    let account: Account
    let theme: PresentationTheme
    let strings: PresentationStrings
    let dateTimeFormat: PresentationDateTimeFormat
    let nameDisplayOrder: PresentationPersonNameOrder
    let website: WebAuthorization
    let peer: Peer?
    let enabled: Bool
    let editing: Bool
    let revealed: Bool
    let sectionId: ItemListSectionId
    let setSessionIdWithRevealedOptions: (Int64?, Int64?) -> Void
    let removeSession: (Int64) -> Void
    
    init(account: Account, theme: PresentationTheme, strings: PresentationStrings, dateTimeFormat: PresentationDateTimeFormat, nameDisplayOrder: PresentationPersonNameOrder, website: WebAuthorization, peer: Peer?, enabled: Bool, editing: Bool, revealed: Bool, sectionId: ItemListSectionId, setSessionIdWithRevealedOptions: @escaping (Int64?, Int64?) -> Void, removeSession: @escaping (Int64) -> Void) {
        self.account = account
        self.theme = theme
        self.strings = strings
        self.dateTimeFormat = dateTimeFormat
        self.nameDisplayOrder = nameDisplayOrder
        self.website = website
        self.peer = peer
        self.enabled = enabled
        self.editing = editing
        self.revealed = revealed
        self.sectionId = sectionId
        self.setSessionIdWithRevealedOptions = setSessionIdWithRevealedOptions
        self.removeSession = removeSession
    }
    
    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 = ItemListWebsiteItemNode()
            let (layout, apply) = node.asyncLayout()(self, params, itemListNeighbors(item: self, topItem: previousItem as? ItemListItem, bottomItem: nextItem as? ItemListItem))
            
            node.contentSize = layout.contentSize
            node.insets = layout.insets
            
            Queue.mainQueue().async {
                completion(node, {
                    return (nil, { _ in apply(false) })
                })
            }
        }
    }
    
    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 {
            if let nodeValue = node() as? ItemListWebsiteItemNode {
                let makeLayout = nodeValue.asyncLayout()
                
                var animated = true
                if case .None = animation {
                    animated = false
                }
                
                async {
                    let (layout, apply) = makeLayout(self, params, itemListNeighbors(item: self, topItem: previousItem as? ItemListItem, bottomItem: nextItem as? ItemListItem))
                    Queue.mainQueue().async {
                        completion(layout, { _ in
                            apply(animated)
                        })
                    }
                }
            }
        }
    }
}

private let avatarFont = UIFont(name: ".SFCompactRounded-Semibold", size: 9.0)!
private let titleFont = Font.medium(15.0)
private let textFont = Font.regular(13.0)

class ItemListWebsiteItemNode: ItemListRevealOptionsItemNode {
    private let backgroundNode: ASDisplayNode
    private let topStripeNode: ASDisplayNode
    private let bottomStripeNode: ASDisplayNode
    private let highlightedBackgroundNode: ASDisplayNode
    private var disabledOverlayNode: ASDisplayNode?
    private let maskNode: ASImageNode
    
    private let avatarNode: AvatarNode
    private let titleNode: TextNode
    private let appNode: TextNode
    private let locationNode: TextNode
    private let labelNode: TextNode
    
    private var layoutParams: (ItemListWebsiteItem, ListViewItemLayoutParams, ItemListNeighbors)?
    
    private var editableControlNode: ItemListEditableControlNode?
    
    init() {
        self.backgroundNode = ASDisplayNode()
        self.backgroundNode.isLayerBacked = true
        
        self.topStripeNode = ASDisplayNode()
        self.topStripeNode.isLayerBacked = true
        
        self.bottomStripeNode = ASDisplayNode()
        self.bottomStripeNode.isLayerBacked = true
        
        self.maskNode = ASImageNode()
        
        self.avatarNode = AvatarNode(font: avatarFont)
        
        self.titleNode = TextNode()
        self.titleNode.isUserInteractionEnabled = false
        self.titleNode.contentMode = .left
        self.titleNode.contentsScale = UIScreen.main.scale
        
        self.appNode = TextNode()
        self.appNode.isUserInteractionEnabled = false
        self.appNode.contentMode = .left
        self.appNode.contentsScale = UIScreen.main.scale
        
        self.locationNode = TextNode()
        self.locationNode.isUserInteractionEnabled = false
        self.locationNode.contentMode = .left
        self.locationNode.contentsScale = UIScreen.main.scale
        
        self.labelNode = TextNode()
        self.labelNode.isUserInteractionEnabled = false
        self.labelNode.contentMode = .left
        self.labelNode.contentsScale = UIScreen.main.scale
        
        self.highlightedBackgroundNode = ASDisplayNode()
        self.highlightedBackgroundNode.isLayerBacked = true
        
        super.init(layerBacked: false, dynamicBounce: false, rotated: false, seeThrough: false)
        
        self.addSubnode(self.avatarNode)
        self.addSubnode(self.titleNode)
        self.addSubnode(self.appNode)
        self.addSubnode(self.locationNode)
        self.addSubnode(self.labelNode)
    }
    
    func asyncLayout() -> (_ item: ItemListWebsiteItem, _ params: ListViewItemLayoutParams, _ neighbors: ItemListNeighbors) -> (ListViewItemNodeLayout, (Bool) -> Void) {
        let makeTitleLayout = TextNode.asyncLayout(self.titleNode)
        let makeAppLayout = TextNode.asyncLayout(self.appNode)
        let makeLocationLayout = TextNode.asyncLayout(self.locationNode)
        let makeLabelLayout = TextNode.asyncLayout(self.labelNode)
        let editableControlLayout = ItemListEditableControlNode.asyncLayout(self.editableControlNode)
        
        var currentDisabledOverlayNode = self.disabledOverlayNode
        
        let currentItem = self.layoutParams?.0
        
        return { item, params, neighbors in
            var updatedTheme: PresentationTheme?
            
            if currentItem?.theme !== item.theme {
                updatedTheme = item.theme
            }
            
            var titleAttributedString: NSAttributedString?
            var appAttributedString: NSAttributedString?
            var locationAttributedString: NSAttributedString?
            var labelAttributedString: NSAttributedString?
            
            let peerRevealOptions = [ItemListRevealOption(key: 0, title: item.strings.AuthSessions_LogOut, icon: .none, color: item.theme.list.itemDisclosureActions.destructive.fillColor, textColor: item.theme.list.itemDisclosureActions.destructive.foregroundColor)]
            
            let rightInset: CGFloat = params.rightInset
            
            if let user = item.peer as? TelegramUser {
                titleAttributedString = NSAttributedString(string: user.displayTitle(strings: item.strings, displayOrder: item.nameDisplayOrder), font: titleFont, textColor: item.theme.list.itemPrimaryTextColor)
            }
            
            var appString = ""
            if !item.website.domain.isEmpty {
                appString = item.website.domain
            }
            
            if !item.website.browser.isEmpty {
                if !appString.isEmpty {
                    appString += ", "
                }
                appString += item.website.browser
            }
            
            if !item.website.platform.isEmpty {
                if !appString.isEmpty {
                    appString += ", "
                }
                appString += item.website.platform
            }
            
            appAttributedString = NSAttributedString(string: appString, font: textFont, textColor: item.theme.list.itemPrimaryTextColor)
            locationAttributedString = NSAttributedString(string: "\(item.website.ip) — \(item.website.region)", font: textFont, textColor: item.theme.list.itemSecondaryTextColor)

            let timestamp = Int32(CFAbsoluteTimeGetCurrent() + NSTimeIntervalSince1970)
            let dateText = stringForRelativeTimestamp(strings: item.strings, relativeTimestamp: item.website.dateActive, relativeTo: timestamp, dateTimeFormat: item.dateTimeFormat)
            labelAttributedString = NSAttributedString(string: dateText, font: textFont, textColor: item.theme.list.itemSecondaryTextColor)
            
            let leftInset: CGFloat = 15.0 + params.leftInset
            
            var editableControlSizeAndApply: (CGSize, () -> ItemListEditableControlNode)?
            
            let editingOffset: CGFloat
            if item.editing {
                let sizeAndApply = editableControlLayout(75.0, item.theme, false)
                editableControlSizeAndApply = sizeAndApply
                editingOffset = sizeAndApply.0.width
            } else {
                editingOffset = 0.0
            }
            
            let (labelLayout, labelApply) = makeLabelLayout(TextNodeLayoutArguments(attributedString: labelAttributedString, backgroundColor: nil, maximumNumberOfLines: 1, truncationType: .end, constrainedSize: CGSize(width: params.width - leftInset - 8.0 - editingOffset - rightInset, height: CGFloat.greatestFiniteMagnitude), alignment: .natural, cutout: nil, insets: UIEdgeInsets()))
            let (titleLayout, titleApply) = makeTitleLayout(TextNodeLayoutArguments(attributedString: titleAttributedString, backgroundColor: nil, maximumNumberOfLines: 1, truncationType: .end, constrainedSize: CGSize(width: params.width - leftInset - 8.0 - editingOffset - rightInset - labelLayout.size.width - 5.0 - 20.0, height: CGFloat.greatestFiniteMagnitude), alignment: .natural, cutout: nil, insets: UIEdgeInsets()))
            let (appLayout, appApply) = makeAppLayout(TextNodeLayoutArguments(attributedString: appAttributedString, backgroundColor: nil, maximumNumberOfLines: 1, truncationType: .end, constrainedSize: CGSize(width: params.width - leftInset - 8.0 - editingOffset - rightInset, height: CGFloat.greatestFiniteMagnitude), alignment: .natural, cutout: nil, insets: UIEdgeInsets()))
            let (locationLayout, locationApply) = makeLocationLayout(TextNodeLayoutArguments(attributedString: locationAttributedString, backgroundColor: nil, maximumNumberOfLines: 1, truncationType: .end, constrainedSize: CGSize(width: params.width - leftInset - 8.0 - editingOffset - rightInset, height: CGFloat.greatestFiniteMagnitude), alignment: .natural, cutout: nil, insets: UIEdgeInsets()))
            
            let insets = itemListNeighborsGroupedInsets(neighbors)
            let contentSize = CGSize(width: params.width, height: 75.0)
            let separatorHeight = UIScreenPixel
            
            let layout = ListViewItemNodeLayout(contentSize: contentSize, insets: insets)
            let layoutSize = layout.size
            
            if !item.enabled {
                if currentDisabledOverlayNode == nil {
                    currentDisabledOverlayNode = ASDisplayNode()
                    currentDisabledOverlayNode?.backgroundColor = UIColor(white: 1.0, alpha: 0.5)
                }
            } else {
                currentDisabledOverlayNode = nil
            }
            
            return (layout, { [weak self] animated in
                if let strongSelf = self {
                    strongSelf.layoutParams = (item, params, neighbors)
                    
                    if let _ = updatedTheme {
                        strongSelf.topStripeNode.backgroundColor = item.theme.list.itemBlocksSeparatorColor
                        strongSelf.bottomStripeNode.backgroundColor = item.theme.list.itemBlocksSeparatorColor
                        strongSelf.backgroundNode.backgroundColor = item.theme.list.itemBlocksBackgroundColor
                        strongSelf.highlightedBackgroundNode.backgroundColor = item.theme.list.itemHighlightedBackgroundColor
                    }
                    
                    if let peer = item.peer {
                        strongSelf.avatarNode.setPeer(account: item.account, theme: item.theme, peer: peer, authorOfMessage: nil, overrideImage: nil, emptyColor: nil, clipStyle: .none, synchronousLoad: false)
                    }
                    
                    let revealOffset = strongSelf.revealOffset
                    
                    let transition: ContainedViewLayoutTransition
                    if animated {
                        transition = ContainedViewLayoutTransition.animated(duration: 0.4, curve: .spring)
                    } else {
                        transition = .immediate
                    }
                    
                    if let currentDisabledOverlayNode = currentDisabledOverlayNode {
                        if currentDisabledOverlayNode != strongSelf.disabledOverlayNode {
                            strongSelf.disabledOverlayNode = currentDisabledOverlayNode
                            strongSelf.addSubnode(currentDisabledOverlayNode)
                            currentDisabledOverlayNode.alpha = 0.0
                            transition.updateAlpha(node: currentDisabledOverlayNode, alpha: 1.0)
                            currentDisabledOverlayNode.frame = CGRect(origin: CGPoint(), size: CGSize(width: layout.contentSize.width, height: layout.contentSize.height - separatorHeight))
                        } else {
                            transition.updateFrame(node: currentDisabledOverlayNode, frame: CGRect(origin: CGPoint(), size: CGSize(width: layout.contentSize.width, height: layout.contentSize.height - separatorHeight)))
                        }
                    } else if let disabledOverlayNode = strongSelf.disabledOverlayNode {
                        transition.updateAlpha(node: disabledOverlayNode, alpha: 0.0, completion: { [weak disabledOverlayNode] _ in
                            disabledOverlayNode?.removeFromSupernode()
                        })
                        strongSelf.disabledOverlayNode = nil
                    }
                    
                    if let editableControlSizeAndApply = editableControlSizeAndApply {
                        let editableControlFrame = CGRect(origin: CGPoint(x: params.leftInset + revealOffset, y: 0.0), size: editableControlSizeAndApply.0)
                        if strongSelf.editableControlNode == nil {
                            let editableControlNode = editableControlSizeAndApply.1()
                            editableControlNode.tapped = {
                                if let strongSelf = self {
                                    strongSelf.setRevealOptionsOpened(true, animated: true)
                                    strongSelf.revealOptionsInteractivelyOpened()
                                }
                            }
                            strongSelf.editableControlNode = editableControlNode
                            strongSelf.insertSubnode(editableControlNode, aboveSubnode: strongSelf.titleNode)
                            editableControlNode.frame = editableControlFrame
                            transition.animatePosition(node: editableControlNode, from: CGPoint(x: -editableControlFrame.size.width / 2.0, y: editableControlFrame.midY))
                            editableControlNode.alpha = 0.0
                            transition.updateAlpha(node: editableControlNode, alpha: 1.0)
                        } else {
                            strongSelf.editableControlNode?.frame = editableControlFrame
                        }
                        strongSelf.editableControlNode?.isHidden = false
                    } else if let editableControlNode = strongSelf.editableControlNode {
                        var editableControlFrame = editableControlNode.frame
                        editableControlFrame.origin.x = -editableControlFrame.size.width
                        strongSelf.editableControlNode = nil
                        transition.updateAlpha(node: editableControlNode, alpha: 0.0)
                        transition.updateFrame(node: editableControlNode, frame: editableControlFrame, completion: { [weak editableControlNode] _ in
                            editableControlNode?.removeFromSupernode()
                        })
                    }
                    
                    let _ = labelApply()
                    let _ = titleApply()
                    let _ = appApply()
                    let _ = locationApply()
                    
                    if strongSelf.backgroundNode.supernode == nil {
                        strongSelf.insertSubnode(strongSelf.backgroundNode, at: 0)
                    }
                    if strongSelf.topStripeNode.supernode == nil {
                        strongSelf.insertSubnode(strongSelf.topStripeNode, at: 1)
                    }
                    if strongSelf.bottomStripeNode.supernode == nil {
                        strongSelf.insertSubnode(strongSelf.bottomStripeNode, at: 2)
                    }
                    if strongSelf.maskNode.supernode == nil {
                        strongSelf.insertSubnode(strongSelf.maskNode, at: 3)
                    }
                    
                    let hasCorners = itemListHasRoundedBlockLayout(params)
                    var hasTopCorners = false
                    var hasBottomCorners = false
                    switch neighbors.top {
                        case .sameSection(false):
                            strongSelf.topStripeNode.isHidden = true
                        default:
                            hasTopCorners = true
                            strongSelf.topStripeNode.isHidden = hasCorners
                    }
                    let bottomStripeInset: CGFloat
                    let bottomStripeOffset: CGFloat
                    switch neighbors.bottom {
                        case .sameSection(false):
                            bottomStripeInset = leftInset + editingOffset
                            bottomStripeOffset = -separatorHeight
                        default:
                            bottomStripeInset = 0.0
                            bottomStripeOffset = 0.0
                            hasBottomCorners = true
                            strongSelf.bottomStripeNode.isHidden = hasCorners
                    }
                    
                    strongSelf.maskNode.image = hasCorners ? PresentationResourcesItemList.cornersImage(item.theme, top: hasTopCorners, bottom: hasBottomCorners) : nil
                    
                    strongSelf.backgroundNode.frame = CGRect(origin: CGPoint(x: 0.0, y: -min(insets.top, separatorHeight)), size: CGSize(width: params.width, height: contentSize.height + min(insets.top, separatorHeight) + min(insets.bottom, separatorHeight)))
                    strongSelf.maskNode.frame = strongSelf.backgroundNode.frame.insetBy(dx: params.leftInset, dy: 0.0)
                    transition.updateFrame(node: strongSelf.topStripeNode, frame: CGRect(origin: CGPoint(x: 0.0, y: -min(insets.top, separatorHeight)), size: CGSize(width: layoutSize.width, height: separatorHeight)))
                    transition.updateFrame(node: strongSelf.bottomStripeNode, frame: CGRect(origin: CGPoint(x: bottomStripeInset, y: contentSize.height + bottomStripeOffset), size: CGSize(width: layoutSize.width - bottomStripeInset, height: separatorHeight)))
                    
                    
                    transition.updateFrame(node: strongSelf.avatarNode, frame: CGRect(origin: CGPoint(x: leftInset + revealOffset + editingOffset + 1.0, y: 12.0), size: CGSize(width: 13.0, height: 13.0)))
                    transition.updateFrame(node: strongSelf.labelNode, frame: CGRect(origin: CGPoint(x: revealOffset + params.width - labelLayout.size.width - 15.0 - rightInset, y: 10.0), size: labelLayout.size))
                    transition.updateFrame(node: strongSelf.titleNode, frame: CGRect(origin: CGPoint(x: leftInset + revealOffset + editingOffset + 20.0, y: 10.0), size: titleLayout.size))
                    transition.updateFrame(node: strongSelf.appNode, frame: CGRect(origin: CGPoint(x: leftInset + revealOffset + editingOffset, y: 30.0), size: appLayout.size))
                    transition.updateFrame(node: strongSelf.locationNode, frame: CGRect(origin: CGPoint(x: leftInset + revealOffset + editingOffset, y: 50.0), size: locationLayout.size))
                    
                    strongSelf.highlightedBackgroundNode.frame = CGRect(origin: CGPoint(x: 0.0, y: -UIScreenPixel), size: CGSize(width: params.width, height: 75.0 + UIScreenPixel + UIScreenPixel))
                    
                    strongSelf.updateLayout(size: layout.contentSize, leftInset: params.leftInset, rightInset: params.rightInset)
                    
                    strongSelf.setRevealOptions((left: [], right: peerRevealOptions))
                    strongSelf.setRevealOptionsOpened(item.revealed, animated: animated)
                }
            })
        }
    }
    
    override func animateInsertion(_ currentTimestamp: Double, duration: Double, short: Bool) {
        self.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.4)
    }
    
    override func animateRemoved(_ currentTimestamp: Double, duration: Double) {
        self.layer.animateAlpha(from: 1.0, to: 0.0, duration: 0.15, removeOnCompletion: false)
    }
    
    override func updateRevealOffset(offset: CGFloat, transition: ContainedViewLayoutTransition) {
        super.updateRevealOffset(offset: offset, transition: transition)
        
        guard let params = self.layoutParams?.1 else {
            return
        }
        
        let leftInset: CGFloat = 15.0 + params.leftInset
        
        let editingOffset: CGFloat
        if let editableControlNode = self.editableControlNode {
            editingOffset = editableControlNode.bounds.size.width
            var editableControlFrame = editableControlNode.frame
            editableControlFrame.origin.x = params.leftInset + offset
            transition.updateFrame(node: editableControlNode, frame: editableControlFrame)
        } else {
            editingOffset = 0.0
        }
        
        transition.updateFrame(node: self.avatarNode, frame: CGRect(origin: CGPoint(x: leftInset + self.revealOffset + editingOffset + 1.0, y: self.avatarNode.frame.minY), size: self.avatarNode.bounds.size))
        transition.updateFrame(node: self.labelNode, frame: CGRect(origin: CGPoint(x: self.revealOffset + params.width - params.rightInset - self.labelNode.bounds.size.width - 15.0, y: self.labelNode.frame.minY), size: self.labelNode.bounds.size))
        transition.updateFrame(node: self.titleNode, frame: CGRect(origin: CGPoint(x: leftInset + self.revealOffset + editingOffset + 20.0, y: self.titleNode.frame.minY), size: self.titleNode.bounds.size))
        transition.updateFrame(node: self.appNode, frame: CGRect(origin: CGPoint(x: leftInset + self.revealOffset + editingOffset, y: self.appNode.frame.minY), size: self.appNode.bounds.size))
        transition.updateFrame(node: self.locationNode, frame: CGRect(origin: CGPoint(x: leftInset + self.revealOffset + editingOffset, y: self.locationNode.frame.minY), size: self.locationNode.bounds.size))
    }
    
    override func revealOptionsInteractivelyOpened() {
        if let (item, _, _) = self.layoutParams {
            item.setSessionIdWithRevealedOptions(item.website.hash, nil)
        }
    }
    
    override func revealOptionsInteractivelyClosed() {
        if let (item, _, _) = self.layoutParams {
            item.setSessionIdWithRevealedOptions(nil, item.website.hash)
        }
    }
    
    override func revealOptionSelected(_ option: ItemListRevealOption, animated: Bool) {
        self.setRevealOptionsOpened(false, animated: true)
        self.revealOptionsInteractivelyClosed()
        
        if let (item, _, _) = self.layoutParams {
            item.removeSession(item.website.hash)
        }
    }
}