//
//  KMHomeRightView.swift
//  PDF Reader Pro
//
//  Created by Niehaoyu on 2024/10/10.
//

import Cocoa
import KMComponentLibrary

@objc public protocol KMHomeRightViewDelegate: AnyObject {
    
    //点击管理快捷工具按钮
    @objc optional func homeRightViewDidManageQuickTools(_ view: KMHomeRightView)
    
    //点击快捷工具列表中的某一项
    @objc optional func homeRightViewDidQuickToolsItemClicked(_ view: KMHomeRightView, _ toolType: HomeQuickToolType)
 
    //最近文件列表删除更新结束后回调
    @objc optional func homeRightViewDidRecentFilesUpdated(_ view: KMHomeRightView)
    
    //选择打开文件
    @objc optional func homeRightViewDidChooseFileToOpen(_ view: KMHomeRightView, _ fileURL: URL)
 
}

public class KMHomeRightView: BaseXibView {
    
    @IBOutlet var scrollView: NSScrollView!
    @IBOutlet var collectionView: NSCollectionView!
    
    var filesHeaderView: KMHomeFilesHeaderView = KMHomeFilesHeaderView()
    var quickToolsView: KMHomeQuickToolsView = KMHomeQuickToolsView()
    var filesEmptyView: KMHistoryEmptyView = KMHistoryEmptyView()
     
    var groupView: ComponentGroup!
    var menuActionIndexPaths: Set<IndexPath> = []
    var groupActionView: NSView?
    var groupViewPoint: CGPoint = CGPointZero
    
    var refreshItemData: Bool = true
    
    weak open var delegate: KMHomeRightViewDelegate?

    //MARK: - func
    public override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
        
        // Drawing code here.
    }
    
    public required init?(coder decoder: NSCoder) {
        super.init(coder: decoder)
        
    }
    
    override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)
    }
    
    public override func awakeFromNib() {
        super.awakeFromNib()
            
        configUI()
    }
    
    public func resetScrollerStyle() {
        
        DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.1) {
            self.scrollView.scrollerStyle = .overlay
        }
    }
    
    func configUI() {
         
        collectionView.backgroundColors = [NSColor.clear]
        collectionView.wantsLayer = true
        collectionView.layer?.backgroundColor = NSColor.clear.cgColor
        collectionView.delegate = self
        collectionView.dataSource = self
        collectionView.allowsEmptySelection = true
        
        collectionView.register(KMHistoryFileThumbItem.self, forItemWithIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHistoryFileThumbItem"))
        collectionView.register(KMHistoryFileListItem.self, forItemWithIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHistoryFileListItem"))

        collectionView.register(KMHomeQuickToolsView.self, forSupplementaryViewOfKind: NSCollectionView.elementKindSectionHeader, withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "kmHomeQuickToolsView"))
        collectionView.register(KMHomeFilesHeaderView.self, forSupplementaryViewOfKind: NSCollectionView.elementKindSectionHeader, withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "kmHomeFilesHeaderView"))
        
        collectionView.register(KMHomeFilesEmptyHeaderView.self, forSupplementaryViewOfKind: NSCollectionView.elementKindSectionHeader, withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHomeFilesEmptyHeaderView"))
        collectionView.register(KMHomeFilesEmptyHeaderView.self, forSupplementaryViewOfKind: NSCollectionView.elementKindSectionFooter, withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHomeFilesEmptyHeaderView"))
        
    }
    
    //刷新所有数据
    public func reloadData() {
        
        HistoryFilesManager.manager.refreshHistoryFile()
        
        collectionView.reloadData()
        
    }
    
    //刷新列表文件UI
    public func updateHistoryFileListItemUI() {
        if HistoryFilesManager.manager.showMode == .List {
            refreshItemData = false
            collectionView.reloadItems(at: collectionView.indexPathsForVisibleItems())
            DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.3) {
                self.refreshItemData = true
            }
        }
    }
    
    //刷新快捷工具列表
    public func reloadQuickTools() {
        quickToolsView.reloadData()
    }
    
    public func updateQuickToolsUI() {
        quickToolsView.refreshUI()
    }
    
    //窗口大小变化时调用此方法
    public func windowFrameUpdated() {
        updateHistoryFileListItemUI()
        
        updateQuickToolsUI()
    }
    
    //MARK: - Private
    private func collectionViewSelectedChanged() {
        let indexs = collectionView.selectionIndexPaths
        HistoryFilesManager.manager.selectFiles.removeAll()
        if indexs.count >= 0 {
            for index in indexs {
                let url = HistoryFilesManager.manager.files[index.item]
                HistoryFilesManager.manager.selectFiles.append(url)
            }
        }
        filesHeaderView.updateDeleteButtonState()
    }
    
    //显示右键菜单
    func showFileMoreActionMenu(point: CGPoint) {
        var viewHeight: CGFloat = 8
        var menuItemArr: [ComponentMenuitemProperty] = []
         
        var items: [(String, String)] = [("Show in Finder", "ShowInFinderKey"),
                                         ("File Information...", "FileInformationKey"),
                                         ("Remove from Recents", "RemovefromRecentKey"),
                                         (" ", " "),
                                         ("Share...", "ShareKey"),
                                         ("Print...", "PrintKey")]
        if collectionView.selectionIndexPaths.count > 1 {
            items = [("Show in Finder", "ShowInFinderKey"),
                     ("Remove from Recents", "RemovefromRecentKey"),
                     (" ", " "),
                     ("Share...", "ShareKey")]
        }
        for (i, value) in items {
            if i == " " {
                let property: ComponentMenuitemProperty = ComponentMenuitemProperty.divider()
                menuItemArr.append(property)
                viewHeight += 8
            } else {

                let properties_Menuitem: ComponentMenuitemProperty = ComponentMenuitemProperty(multipleSelect: false,
                                                                                               itemSelected: false,
                                                                                               isDisabled: false,
                                                                                               keyEquivalent: nil,
                                                                                               text: KMLocalizedString(i),
                                                                                               identifier: value)
                if value == "FileInformationKey" {
                    properties_Menuitem.keyEquivalent = "⌘ D"
                } else if value == "PrintKey" {
                    properties_Menuitem.keyEquivalent = "⌘ P"
                }
                menuItemArr.append(properties_Menuitem)
                viewHeight += 36
            }
        }
        
        if groupView == nil {
            groupView = ComponentGroup.createFromNib(in: ComponentLibrary.shared.componentBundle())
        }
        groupView.groupDelegate = self
        groupView?.frame = CGRectMake(0, 0, 180, viewHeight)
        groupView.updateGroupInfo(menuItemArr)
        if HistoryFilesManager.manager.showMode == .Thumbnail {
            groupView.showWithPoint(CGPoint(x: point.x + 60 + CGRectGetWidth(groupView.frame), y: point.y - viewHeight), relativeTo: self)
        } else {
            groupView.showWithPoint(CGPoint(x: point.x + 40 + CGRectGetWidth(groupView.frame), y: point.y - viewHeight), relativeTo: self)
        }
        
        menuActionIndexPaths = collectionView.selectionIndexPaths
    }
    
    //MARK: -删除文件列表
    func historyFileDeleteAction(_ indexPaths: [URL]) -> Void {
        let urls: Array<URL> = NSDocumentController.shared.recentDocumentURLs
        NSDocumentController.shared.clearRecentDocuments(nil)
        DispatchQueue.main.asyncAfter(deadline: .now()) { [weak self] in
            guard let weakSelf = self else { return }
            for (_, url) in urls.enumerated() {
                if !indexPaths.contains(url) {
                    NSDocumentController.shared.noteNewRecentDocumentURL(url)
                }
            }
            weakSelf.delegate?.homeRightViewDidRecentFilesUpdated?(weakSelf)
        
            weakSelf.reloadData()
        }
    }
    
    @objc func emptyViewAddFileClicked(_ sender: NSView) {
        let openPanel = NSOpenPanel()
        openPanel.allowedFileTypes = ["pdf", "PDF"]
        openPanel.allowsMultipleSelection = false
        openPanel.beginSheetModal(for: self.window!) { [weak self] result in
             if result == NSApplication.ModalResponse.OK {
                 if let url = openPanel.url {
                     guard let weakSelf = self else { return }
                     weakSelf.delegate?.homeRightViewDidChooseFileToOpen?(weakSelf, url)
                 }
            }
        }
    }
    
    //MARK: - MouseEvent
    public override func rightMouseDown(with event: NSEvent) {
        super.rightMouseDown(with: event)
        
        var point = convert(event.locationInWindow, from: nil)
        if HistoryFilesManager.manager.showMode == .List {
            point.x += 10
        }
        let collectionPoint = convert(point, to: collectionView)
        if let indexPath = collectionView.indexPathForItem(at: collectionPoint) {
            if collectionView.selectionIndexPaths.contains(indexPath) {
                
            } else {
                collectionView.deselectAll(nil)
                collectionView.selectItems(at: [indexPath], scrollPosition: .nearestHorizontalEdge)
            }
            groupActionView = collectionView.item(at: indexPath)?.view
            groupViewPoint = point
            showFileMoreActionMenu(point: point)
        }
        collectionViewSelectedChanged()
    }
}

//MARK: - NSCollectionViewDelegate, NSCollectionViewDataSource
extension KMHomeRightView: NSCollectionViewDelegate, NSCollectionViewDataSource, NSCollectionViewDelegateFlowLayout {
     
    public func numberOfSections(in collectionView: NSCollectionView) -> Int {
        return 2
    }
    
    public func collectionView(_ collectionView: NSCollectionView, numberOfItemsInSection section: Int) -> Int {
        if section == 0 {
            return 0
        }
        return HistoryFilesManager.manager.files.count
    }
     
    public func collectionView(_ collectionView: NSCollectionView, itemForRepresentedObjectAt indexPath: IndexPath) -> NSCollectionViewItem {
        if indexPath.item >= HistoryFilesManager.manager.files.count {
            return NSCollectionViewItem()
        }
        
        if HistoryFilesManager.manager.showMode == .Thumbnail {
            let item: KMHistoryFileThumbItem = collectionView.makeItem(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHistoryFileThumbItem"), for: indexPath) as! KMHistoryFileThumbItem
            item.fileURL = HistoryFilesManager.manager.files[indexPath.item]
            item.reloadData()
            item.delegate = self
            
            return item
        } else if HistoryFilesManager.manager.showMode == .List {
            let item: KMHistoryFileListItem = collectionView.makeItem(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHistoryFileListItem"), for: indexPath) as! KMHistoryFileListItem
            item.fileURL = HistoryFilesManager.manager.files[indexPath.item]
            item.reloadData()
            item.delegate = self
            
            return item
        }
        return NSCollectionViewItem()
    }
    
    public func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> NSSize {
        if HistoryFilesManager.manager.showMode == .Thumbnail {
            return CGSize(width: 172, height: 248)
        } else if HistoryFilesManager.manager.showMode == .List {
            print(collectionView.frame.size.width, self.frame.size.width)
            return CGSize(width: collectionView.frame.size.width-80, height: 80)
        }
         
        return CGSize(width: 0.01, height: 0.01)
    }
    
    public func collectionView(_ collectionView: NSCollectionView, viewForSupplementaryElementOfKind kind: NSCollectionView.SupplementaryElementKind, at indexPath: IndexPath) -> NSView {
         
        if kind == NSCollectionView.elementKindSectionHeader {
            if indexPath.section == 0 {
                //quick tools
                quickToolsView = collectionView.makeSupplementaryView(ofKind: kind, withIdentifier: NSUserInterfaceItemIdentifier("kmHomeQuickToolsView"), for: indexPath) as! KMHomeQuickToolsView
                quickToolsView.delegate = self
                quickToolsView.reloadData()
                
                return quickToolsView
                
            } else if indexPath.section == 1 {
                //Recently
                filesHeaderView = collectionView.makeSupplementaryView(ofKind: kind, withIdentifier: NSUserInterfaceItemIdentifier("kmHomeFilesHeaderView"), for: indexPath) as! KMHomeFilesHeaderView
                filesHeaderView.delegate = self
                
                return filesHeaderView
            }
        } else if kind == NSCollectionView.elementKindSectionFooter {
            let view = collectionView.makeSupplementaryView(ofKind: kind, withIdentifier: NSUserInterfaceItemIdentifier("KMHomeFilesEmptyHeaderView"), for: indexPath) as! KMHomeFilesEmptyHeaderView
            if self.filesEmptyView.superview != nil {
                self.filesEmptyView.removeFromSuperview()
            }
            if indexPath.section == 1 &&
                HistoryFilesManager.manager.files.count == 0 {
                
                filesEmptyView.frame = CGRectMake((CGRectGetWidth(collectionView.frame)-520)/2, (344-184)/2, 520, 184)
                filesEmptyView.autoresizingMask = [.minXMargin, .maxXMargin, .minYMargin, .maxYMargin]
                filesEmptyView.emptyView.setTarget(self, action: #selector(emptyViewAddFileClicked(_:)))
                view.addSubview(filesEmptyView)
                
            }
            return view
        }
        return NSView()
        
    }
    
    public func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        return 8
    }
    
    public func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
        return 0.01
    }
     
    public func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> NSSize {
        if section == 0 {
            if KMNHomeQuickToolManager.defaultManager.collapseTools {
                if KMNHomeQuickToolManager.defaultManager.quickToolsItemMutableArray.count <= 4 {
                    return NSSize(width: collectionView.frame.size.width, height: 172+32+2-60-14) //折叠
                }
                return NSSize(width: collectionView.frame.size.width, height: 172+32+2) //折叠
            } else {
                if KMNHomeQuickToolManager.defaultManager.quickToolsItemMutableArray.count <= 4 {
                    return NSSize(width: collectionView.frame.size.width, height: 228+32-88-14)
                }
                return NSSize(width: collectionView.frame.size.width, height: 228+32)
            }
        } else if section == 1 {
            return NSSize(width: collectionView.frame.size.width, height: 28)
        }
        
        return NSSize(width: 0, height: 0.01)
    }
    
    public func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, referenceSizeForFooterInSection section: Int) -> NSSize {
        if section == 0 {
            return NSSize(width: 0, height: 40-16)
        } else if section == 1 {
            if HistoryFilesManager.manager.files.count == 0 {
                return NSSize(width: collectionView.frame.size.width, height: 344)
            }
        }
        
        return NSSize(width: 0, height: 0.01)
        
    }
    
    public func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, insetForSectionAt section: Int) -> NSEdgeInsets {
        return NSEdgeInsetsMake(12, 40, 0, 40)
    }
    
    public func collectionView(_ collectionView: NSCollectionView, didSelectItemsAt indexPaths: Set<IndexPath>) {
        self.collectionViewSelectedChanged()
        
    }
    
    public func collectionView(_ collectionView: NSCollectionView, didDeselectItemsAt indexPaths: Set<IndexPath>) {
        self.collectionViewSelectedChanged()
        
    }
    
}


//MARK: - KMHomeFilesHeaderViewDelegate
extension KMHomeRightView: KMHomeFilesHeaderViewDelegate {
    
    public func homeFilesShowModeDidUpdate(_ view: KMHomeFilesHeaderView) {
        self.reloadData()
    }
    
    public func homeFilesHeaderViewDeleteButtonClicked(_ view: KMHomeFilesHeaderView) {
        
        if UserDefaults.standard.object(forKey: "HomeFilesDeleteConfirmKey") != nil {
            var selects: [URL] = []
            if HistoryFilesManager.manager.selectFiles.count > 0 {
                for selecturl in HistoryFilesManager.manager.selectFiles {
                    selects.append(selecturl)
                }
            }
            HistoryFilesManager.manager.historyFileDeleteAction(selects)
            self.reloadData()
            
            return
        }
        let alert = NSAlert()
        alert.alertStyle = .informational
        if HistoryFilesManager.manager.selectFiles.count > 0 {
            alert.informativeText = KMLocalizedString("Remove Selected Files from your Recent Files?")
        } else {
            alert.informativeText = KMLocalizedString("Remove Files from your Recent Files?")
        }
        alert.messageText = KMLocalizedString("The file will disappear from the recent list.")
        alert.addButton(withTitle: KMLocalizedString("Delete"))
        alert.addButton(withTitle: KMLocalizedString("Cancel"))
        alert.showsSuppressionButton = true
        let response = alert.runModal()
        if response.rawValue == 1000 {
            var selects: [URL] = []
            if HistoryFilesManager.manager.selectFiles.count > 0 {
                for selecturl in HistoryFilesManager.manager.selectFiles {
                    selects.append(selecturl)
                }
            } else {
                for selecturl in HistoryFilesManager.manager.files {
                    selects.append(selecturl)
                }
            }
            HistoryFilesManager.manager.historyFileDeleteAction(selects)
            self.reloadData()
            
            if alert.suppressionButton?.state == .on {
                UserDefaults.standard.set("YES", forKey: "HomeFilesDeleteConfirmKey")
                UserDefaults.standard.synchronize()
            }
        }
        
    }
}

//MARK: - KMHomeQuickToolsViewDelegate
extension KMHomeRightView: KMHomeQuickToolsViewDelegate {
    public func homeQuickToolsViewDidCollapseStateChanged(_ view: KMHomeQuickToolsView) {
        DispatchQueue.main.async {
            self.reloadData()
        }
    }
    
    public func homeQuickToolsViewDidManageTools(_ view: KMHomeQuickToolsView) {
        DispatchQueue.main.async {
            self.delegate?.homeRightViewDidManageQuickTools?(self)
        }
    }
    
    public func homeQuickToolsViewDidItemClicked(_ view: KMHomeQuickToolsView, _ toolType: HomeQuickToolType) {
        DispatchQueue.main.async {
            self.delegate?.homeRightViewDidQuickToolsItemClicked?(self, toolType)
        }
    }
    
}

//MARK: - ComponentGroupDelegate
extension KMHomeRightView: ComponentGroupDelegate {
    public func componentGroupDidSelect(group: ComponentGroup?, menuItemProperty: ComponentMenuitemProperty?) {
        
        var selects: [URL] = []
        let indexs = self.menuActionIndexPaths
        if indexs.count >= 0 {
            for index in indexs {
                let url = HistoryFilesManager.manager.files[index.item]
                selects.append(url)
            }
        }
        
        if menuItemProperty?.identifier == "ShowInFinderKey" {
            NSWorkspace.shared.activateFileViewerSelecting(selects)
        } else if menuItemProperty?.identifier == "FileInformationKey" {
            
        } else if menuItemProperty?.identifier == "RemovefromRecentKey" {
            self.historyFileDeleteAction(selects)
        } else if menuItemProperty?.identifier == "ShareKey" {
             
            let picker = NSSharingServicePicker.init(items: selects)
            if let actionView = self.groupActionView {
                picker.show(relativeTo: actionView.bounds, of: actionView, preferredEdge: NSRectEdge.minY)
            } else {
                picker.show(relativeTo: NSRect(x: self.groupViewPoint.x, y: self.groupViewPoint.y, width: 0, height: 0), of: self.collectionView, preferredEdge: NSRectEdge.minY)
            }
            
        } else if menuItemProperty?.identifier == "PrintKey" {
            
        }
    }
    
}

//MARK: - KMHistoryFileListItemDelegate
extension KMHomeRightView: KMHistoryFileListItemDelegate {
    public   func historyFileListItemDidClickedMore(_ view: KMHistoryFileListItem) {
        if let indexPath = collectionView.indexPath(for: view) {
            if collectionView.selectionIndexPaths.contains(indexPath) {
                
            } else {
                collectionView.deselectAll(nil)
                collectionView.selectItems(at: [indexPath], scrollPosition: .nearestHorizontalEdge)
            }
        }
        groupActionView = view.moreButton

        var point = view.moreButton.superview?.convert(view.moreButton.frame.origin, to: self) ?? CGPointZero
        showFileMoreActionMenu(point: point)
    }
    
    public func historyFileListItemDidDoubleClicked(_ view: KMHistoryFileListItem) {
        if let url = view.fileURL {
            delegate?.homeRightViewDidChooseFileToOpen?(self, url)
        }
    }
}

//MARK: - KMHistoryFileThumbItemDelegate
extension KMHomeRightView: KMHistoryFileThumbItemDelegate {
    func historyFileThumbItemDidDoubleClicked(_ view: KMHistoryFileThumbItem) {
        if let url = view.fileURL {
            delegate?.homeRightViewDidChooseFileToOpen?(self, url)
        }
    }
}