//
//  KMSearchViewController.swift
//  PDF Reader Pro
//
//  Created by lxy on 2022/11/17.
//

import Cocoa

@objc protocol KMSearchViewControllerDelegate {
    @objc optional func searchDoneAction(viewController:KMSearchViewController)
    @objc optional func searchAction(searchString:String, isCase:Bool)
}

class CSearchFieldCustomCell : NSSearchFieldCell {
    required init(coder: NSCoder) {
        super.init(coder: coder)
        let cancelCell = self.cancelButtonCell
        let cancelImage = NSImage(named: "KMImageNameTriBtnClear")
        cancelImage?.size = NSMakeSize(16, 16)
        cancelCell?.image = cancelImage
        cancelCell?.alternateImage = cancelImage
        
        let searchCell = self.searchButtonCell
        let searchImage = NSImage(named: "KMImageNameSearchLeftImage")
        searchImage?.size = NSMakeSize(16, 16)
        searchCell?.image = searchImage
        searchCell?.alternateImage = searchImage
    }
    
    override func resetCancelButtonCell() {
        super.resetCancelButtonCell()
    }
}

class KMSearchViewController: NSViewController {
    let CPDFOfficeSearchHistoryKey = "CPDFOfficeSearchHistoryKey"
    @IBOutlet weak var findTipTextField: NSTextField!
    @IBOutlet weak var resultTextField: NSTextField!
    @IBOutlet weak var allTipTextField: NSTextField!
    @IBOutlet weak var lineView: NSView!
    
    @IBOutlet weak var searchCotentView: NSView!
    @IBOutlet weak var searchTextField: FocusAwareSearchTextField!
    
    @IBOutlet weak var doneButton: NSButton!
    @IBOutlet weak var outlineView: KMOutlineView!
    var isCase = false
    let searchFieldMenu = NSMenu()
    
    @IBOutlet weak var emptyView: NSView!
    
    @IBOutlet weak var tipTitleLabel: NSTextField!
    @IBOutlet weak var searResultLabel: NSTextField!
    
    //select 多选
    var selectItems: [KMSearchMode] = []
    
    var listView : CPDFListView!
    var searchResults : [KMSearchMode] = []
    var sortResults : [KMSearchMode] = []
    var isCancelCell : String = ""
    var previousSearchString: String = ""
    var previousCase: Bool = true
    open weak var delegate: KMSearchViewControllerDelegate?

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do view setup here.
        self.setup()
    }
    
    override func viewDidAppear() {
        super.viewDidAppear()
        NSApplication.shared.mainWindow?.makeFirstResponder(self.searchTextField)
    }
    
    override func viewWillDisappear() {
        super.viewWillDisappear()
        self.cancelAllSearchModel()
    }
    
    override func viewWillAppear() {
        super.viewWillAppear()
        
//        self.selectAllSearchModel()
        self.searchDoneAction()
    }
    
    func setup() {
        self.view.backgroundColor(NSColor.km_init(hex: "#F7F8FA"))
        
        //空状态
        self.emptyView.isHidden = true
        self.searResultLabel.stringValue = NSLocalizedString("No Search Results", comment: "")
        self.searResultLabel.font = NSFont.SFProTextRegularFont(14.0)
        self.searResultLabel.textColor = NSColor.km_init(hex: "#616469")
        
        self.tipTitleLabel.font = NSFont.SFProTextRegularFont(12.0)
        self.tipTitleLabel.textColor = NSColor.km_init(hex: "#94989C")
        let paragraphStyle = NSMutableParagraphStyle()
        paragraphStyle.lineHeightMultiple = 1.32
        paragraphStyle.alignment = .center
        self.tipTitleLabel.attributedStringValue = NSMutableAttributedString(string: NSLocalizedString("Search text can be entered above", comment: ""), attributes: [NSAttributedString.Key.paragraphStyle: paragraphStyle])
        
        self.lineView.backgroundColor(NSColor.km_init(hex: "#EDEEF0"))
        //搜索
        self.searchCotentView.backgroundColor(NSColor.km_init(hex: "#FFFFFF"))
        self.searchCotentView.border()
        
        self.searchTextField.delegate = self
        self.searchTextField.border(NSColor.km_init(hex: "#FFFFFF"), 1, 0)
        self.searchTextField.textColor = NSColor.km_init(hex: "#252629")
        self.searchTextField.font = NSFont.SFProTextRegularFont(14.0)
        let search = UserDefaults.standard.object(forKey: "CPDFOfficeSearchIgnoreCaseKey")
        if search == nil {
            self.isCase = true
        } else {
            self.isCase = UserDefaults.standard.bool(forKey: "CPDFOfficeSearchIgnoreCaseKey")
        }
        self.previousCase = self.isCase
        
        self.findTipTextField.stringValue = NSLocalizedString("Search", comment: "")
        self.findTipTextField.font = NSFont.SFProTextSemiboldFont(14.0)
        self.findTipTextField.textColor = NSColor.km_init(hex: "#252629")
        
        self.doneButton.isHidden = true
        self.doneButton.title = NSLocalizedString("Done", comment: "")
        self.doneButton.backgroundColor(NSColor.km_init(hex: "#1770F4"))
        self.doneButton.font = NSFont.SFProTextRegularFont(12.0)
        self.doneButton.contentTintColor = NSColor.km_init(hex: "#FFFFFF")
        self.doneButton.border(NSColor.km_init(hex: "#1770F4"), 0, 4)
        
        //显示
        self.allTipTextField.stringValue = NSLocalizedString("All", comment: "")
        self.allTipTextField.font = NSFont.SFProTextSemiboldFont(11.0)
        self.allTipTextField.textColor = NSColor.km_init(hex: "#252629")
        
        self.resultTextField.stringValue = NSLocalizedString("Results", comment: "") + ":"
        self.resultTextField.font = NSFont.SFProTextSemiboldFont(11.0)
        self.resultTextField.textColor = NSColor.km_init(hex: "#94989C")
        
        self.outlineView.allowsMultipleSelection = true
        self.outlineView.indentationPerLevel = 0
        
        self.updateSearchMenu()
        (self.searchTextField.cell! as! NSSearchFieldCell).placeholderString = NSLocalizedString("Search PDF", comment: "")
        self.reloadData()
    }
    
    private func updateSearchMenu() {
       searchFieldMenu.removeAllItems()
       let item = searchFieldMenu.addItem(withTitle: NSLocalizedString("Ignore Case", comment: ""), action: #selector(caseSetAction), target: self)
       if self.isCase {
           item?.state = .on
       } else {
           item?.state = .off
       }
       let searchs : [String] = UserDefaults.standard.object(forKey: CPDFOfficeSearchHistoryKey) as? [String] ?? []
       if searchs.count > 0 {
           searchFieldMenu.addItem(NSMenuItem.separator())
           searchFieldMenu.addItem(withTitle: NSLocalizedString("Search History", comment: ""), action: nil, target: self)
           for search in searchs {
               searchFieldMenu.addItem(withTitle: search, action: #selector(searchHistoryAction), target: self)
           }
           searchFieldMenu.addItem(NSMenuItem.separator())
           searchFieldMenu.addItem(withTitle: NSLocalizedString("Clear Search History", comment: ""), action: #selector(clearSearchHistoryAction), target: self)
           self.searchFieldMenu.font = NSFont.SFProTextRegularFont(13.0)
       }
       (self.searchTextField.cell! as! NSSearchFieldCell).searchMenuTemplate = searchFieldMenu
        
        
//        let menus : NSMenu = NSMenu(title: "")
//        menus.addItem(withTitle: NSLocalizedString("Add Crice", comment: ""), action: #selector(addAnonationStyle), target: self, tag: CAnnotationType.circle.rawValue)
//        menus.addItem(withTitle: NSLocalizedString("Add Square", comment: ""), action: #selector(addAnonationStyle), target: self, tag: CAnnotationType.square.rawValue)
//        menus.addItem(withTitle: NSLocalizedString("Add Highlight", comment: ""), action: #selector(addAnonationStyle), target: self, tag: CAnnotationType.highlight.rawValue)
//        menus.addItem(withTitle: NSLocalizedString("Add Underline", comment: ""), action: #selector(addAnonationStyle), target: self, tag: CAnnotationType.underline.rawValue)
//        menus.addItem(withTitle: NSLocalizedString("Add Strikeththrough", comment: ""), action: #selector(addAnonationStyle), target: self, tag: CAnnotationType.strikeOut.rawValue)
//        self.outlineView.menu = menus
    }
    
    func selectedRowIndexs() -> IndexSet {
        let clickRow = self.outlineView.clickedRow
        var selectedRowIndexs = self.outlineView.selectedRowIndexes
        if(clickRow != -1 && !selectedRowIndexs.contains(clickRow)) {
            selectedRowIndexs = [clickRow]
        }
        return selectedRowIndexs
    }
    
    public func reloadData() {
        self.sortResults = KMSearchMode.sortSearchResult(results: self.searchResults)
        if self.searchResults.count > 1 {
            self.resultTextField.stringValue = "Results:\(self.searchResults.count)"
        } else {
            self.resultTextField.stringValue = "Result:\(self.searchResults.count)"
        }
        self.listView.setHighlightedSelection(nil, animated: true)
        self.outlineView.reloadData()
        
    }
}

//MARK: Search
extension KMSearchViewController: NSSearchFieldDelegate {
    private func searchDoneAction() {
        var searchs : [String] = UserDefaults.standard.object(forKey: CPDFOfficeSearchHistoryKey) as? [String] ?? []
        let searchString = self.searchTextField.stringValue
        
        if searchString != "" && (self.previousSearchString != searchString || self.isCase != self.previousCase) {
            //缓存搜索词汇是否重复
            if searchs.contains(searchString) {
                searchs.removeObject(searchString)
            }
            
            if searchs.count == 10 {
                searchs.remove(at: 9)
            }
            
            searchs.insert((self.searchTextField.stringValue), at: 0)
            UserDefaults.standard.set(searchs, forKey: CPDFOfficeSearchHistoryKey)
            
            self.updateSearchMenu()
            self.delegate?.searchAction?(searchString: self.searchTextField.stringValue,isCase:self.isCase)
            
            self.doneButton.isHidden = false
            for model in self.sortResults {
                model.select = true
            }
            self.outlineView.expandItem(nil, expandChildren: true)
            self.selectAllSearchModel()
            
            self.previousSearchString = searchString
            self.previousCase = self.isCase
        }
        
        //移除响应
        NSApplication.shared.mainWindow?.makeFirstResponder(self)
    }
    
    func selectAllSearchModel() {
        //需要延时2s 不然不会高亮
//        DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.3) { [unowned self] in
            //高亮所有注释
            var selections: [CPDFSelection] = []
            for model in self.sortResults {
                for item in model.datas {
                    item.selection.setColor(NSColor.km_init(hex: "#FFE600").withAlphaComponent(0.5))
                    selections.append(item.selection)
                }
            }
            
            self.listView.setHighlightedSelections(selections)
            self.listView.setNeedsDisplayAnnotationViewForVisiblePages()
//        }
    }
    
    func cancelAllSearchModel() {
        self.listView.setHighlightedSelections(nil)
        self.listView.setHighlightedSelection(nil, animated: true)
        self.listView.setNeedsDisplayAnnotationViewForVisiblePages()
        self.outlineView.deselectAll(nil)
        
        //清空搜索词汇
        self.previousSearchString = ""
    }
}

//MARK: Action
extension KMSearchViewController {
    @IBAction func addAnonationStyle(sender: NSMenuItem) {
        let selectRowIndexs = self.selectedRowIndexs()
        if selectRowIndexs.count > 0 {
            var newAnnonations : [CPDFAnnotation] = []
            for selectRow in selectRowIndexs {
                let searchModel = self.outlineView.item(atRow: selectRow) as! KMSearchMode
                if searchModel.datas.count > 0 { //选了到了1页
                    for search in searchModel.datas {
                        let selection = search.selection
                        let annotation = self.listView.addAnnotation(with: CAnnotationType(rawValue: sender.tag) ?? CAnnotationType.unkown, selection: selection, page: selection.page, bounds: selection.bounds)
                        self.listView.setNeedsDisplayAnnotationViewFor(selection.page)
                        if annotation != nil {
                            newAnnonations.append(annotation!)
                        }
                    }
                } else { //选到页码里的条数
                    let selection = searchModel.selection
                    let annotation = self.listView.addAnnotation(with: CAnnotationType(rawValue: sender.tag) ?? CAnnotationType.unkown, selection: selection, page: selection.page, bounds: selection.bounds)
                    self.listView.setNeedsDisplayAnnotationViewFor(selection.page)
                    if annotation != nil {
                        newAnnonations.append(annotation!)
                    }
                }
            }
            self.listView.updateActiveAnnotations(newAnnonations)
        }
    }
    
    @IBAction func doneSearchAction(_ sender: Any) {
        self.searchTextField.stringValue = ""
        self.searchResults = [];
        self.reloadData()
        self.delegate?.searchDoneAction?(viewController: self)
        self.doneButton.isHidden = true
        
        //清空搜索词汇
        self.previousSearchString = ""
    }
    
    @IBAction func searchHistoryAction(sender: NSMenuItem) {
//        self.delegate?.searchAction?(searchString: sender.title, isCase:self.isCase)
        self.searchTextField.stringValue = sender.title
        self.searchDoneAction()
    }
    
    @IBAction func caseSetAction(sender:Any) {
        self.isCase = !self.isCase
        UserDefaults.standard.set(self.isCase, forKey: "CPDFOfficeSearchIgnoreCaseKey")
        self.updateSearchMenu()
        self.searchDoneAction()
    }
    
    @IBAction func clearSearchHistoryAction(sender:Any) {
        UserDefaults.standard.removeObject(forKey: CPDFOfficeSearchHistoryKey)
        self.updateSearchMenu()
    }
    
    @IBAction func escButtonAction(_ sender: Any) {
        self.cancelSelect()
    }
    
    //MARK: 跳转
    //跳转到指定位置 若存在多个 则跳转最后一个
    func previewToSections() {
        if outlineView.selectedRowIndexes.count != 0 {
            var rows: [KMSearchMode] = []
            for index in outlineView.selectedRowIndexes {
                let model: KMSearchMode = outlineView.item(atRow: index) as! KMSearchMode
                rows.append(model)
            }
            self.toSearchModes(rows)
        }
    }
    
    func toSearchModes(_ searchModes: [KMSearchMode]) {
        self.selectAllSearchModel()
        var selections: [CPDFSelection] = []
        for model in searchModes {
            model.selection.setColor(NSColor.km_init(hex: "#FF5C00").withAlphaComponent(0.5))
            selections.append(model.selection)
        }
        self.toSections(selections)
    }
    
    func toSections(_ selections: [CPDFSelection]) {
        self.listView.go(to: selections.last, animated: true)
//        if selections.count == 1 {
//            self.listView.setHighlightedSelection(selections.first, animated: true)
//        } else {
//            self.listView.setHighlightedSelections(selections)
//        }
        self.listView.setNeedsDisplayAnnotationViewForVisiblePages()
    }
    
    func didSelectItem(view: KMSearchTableRowView, event: NSEvent) {
        let rowView: KMSearchTableRowView = view
        if rowView.model.datas.count == 0 {
            //当选中一个时
            if self.outlineView.selectedRowIndexes.count == 1 || (!event.modifierFlags.contains(NSEvent.ModifierFlags.command) &&
                                                                          !event.modifierFlags.contains(NSEvent.ModifierFlags.shift)) {
                let index = self.outlineView.row(for: rowView)
                self.outlineView.selectRowIndexes(IndexSet(integer: IndexSet.Element(index)), byExtendingSelection: false)
            }
            
            //原始数据置空
            for model in self.selectItems {
                model.select = false
                self.outlineView.reloadItem(model)
            }
            
            //获取最新数据
            var items: [KMSearchMode] = []
            for index in self.outlineView.selectedRowIndexes {
                let model: KMSearchMode = self.outlineView.item(atRow: index) as! KMSearchMode
                model.select = true
                self.outlineView.reloadItem(model)
                items.append(model)
            }
            self.selectItems = items
            
            //刷新数据
            self.previewToSections()
        } else {
            let expanded = outlineView.isItemExpanded(outlineView.item(atRow: outlineView.selectedRow))
            if expanded {
                outlineView.collapseItem(outlineView.item(atRow: outlineView.selectedRow), collapseChildren: true)
                rowView.model.select = false
                outlineView.reloadItem(outlineView.item(atRow: outlineView.selectedRow))
            } else {
                outlineView.expandItem(outlineView.item(atRow: outlineView.selectedRow), expandChildren: true)
                rowView.model.select = true
                outlineView.reloadItem(outlineView.item(atRow: outlineView.selectedRow))
            }
        }
    }
    
    func cancelSelect() {
        self.outlineView.deselectAll(nil)
        for model in self.selectItems {
            model.select = false
            self.outlineView.reloadItem(model)
        }
    }
}

// MARK - NSOutlineViewDataSource,NSOutlineViewDelegate

extension KMSearchViewController : NSOutlineViewDataSource,NSOutlineViewDelegate {
    func outlineView(_ outlineView: NSOutlineView, numberOfChildrenOfItem item: Any?) -> Int {
        let indexModel = item as? KMSearchMode
        var count = 0
        if indexModel == nil {
            count = self.sortResults.count;
        } else {
            count = indexModel?.datas.count ?? 0
        }
        if(count == 0) { //无数据时的图
            self.emptyView.isHidden = false
        } else {
            self.emptyView.isHidden = true
        }
        return count
    }
    
    func outlineView(_ outlineView: NSOutlineView, child index: Int, ofItem item: Any?) -> Any {
        let indexModel = item as? KMSearchMode
        var child = KMSearchMode()
        if indexModel == nil {
            child = self.sortResults[index];
        } else {
            child = indexModel?.datas[index] ?? KMSearchMode()
        }
        return child
    }
    
    func outlineView(_ outlineView: NSOutlineView, isItemExpandable item: Any) -> Bool {
        let newitem = item as? KMSearchMode
        return newitem?.datas.count ?? 0 > 0
    }
    
    func outlineView(_ outlineView: NSOutlineView, viewFor tableColumn: NSTableColumn?, item:Any) -> NSView? {
        let cell : KMSearchCellView = KMSearchCellView.init()
        let model : KMSearchMode = item as! KMSearchMode
        cell.model = model
        return cell
    }
    
    func outlineView(_ outlineView: NSOutlineView, rowViewForItem item: Any) -> NSTableRowView? {
        let rowView = KMSearchTableRowView()
        rowView.model = (item as! KMSearchMode)
        rowView.mouseDownCallback = { [unowned self] view, event in
            self.didSelectItem(view: view, event: event)
        }
        
        rowView.hoverCallback = { [unowned self] mouseEntered, mouseBox in
            self.outlineView.enumerateAvailableRowViews { view, row in
                if view is KMSearchTableRowView {
                    (view as? KMSearchTableRowView)?.model.hover = false
                    (view as? KMSearchTableRowView)?.reloadData()
                }
            }
            if mouseEntered {
                rowView.model.hover = true
            } else {
                rowView.model.hover = false
            }
        }
        return rowView
    }
    
    func outlineView(_ outlineView: NSOutlineView, heightOfRowByItem item: Any) -> CGFloat {
        let model : KMSearchMode = item as! KMSearchMode
        if model.datas.count != 0 {
            return 40
        } else {
            let string: NSString = model.attributedString.string as NSString
            let text = string
            let size = CGSize(width: outlineView.frame.width - 32, height: 1000)
            let options = NSString.DrawingOptions.usesFontLeading.union(.usesLineFragmentOrigin)
            let paragraphStyle = NSMutableParagraphStyle()
            paragraphStyle.firstLineHeadIndent = 10.0
            paragraphStyle.headIndent = 10.0
            paragraphStyle.lineBreakMode = .byCharWrapping
            paragraphStyle.lineHeightMultiple = 1.32
            
            let estimatedFrame = NSString(string: text).boundingRect(with: size, options: options, attributes: [NSAttributedString.Key.font: NSFont.SFProTextRegularFont(14.0),
                                                                                                                NSAttributedString.Key.paragraphStyle: paragraphStyle], context: nil)
            
            return estimatedFrame.size.height + 16
        }
    }
    
    
//    func outlineView(_ outlineView: NSOutlineView, isGroupItem item: Any) -> Bool {
//        return true
//    }
    
    
    func outlineView(_ outlineView: NSOutlineView, shouldSelectItem item: Any) -> Bool {
        return true
    }
    
    func outlineViewSelectionDidChange(_ notification: Notification) {
        if self.outlineView.selectedRow == -1 {
            self.cancelSelect()
        }
    }
    
    func outlineView(_ outlineView: NSOutlineView, shouldExpandItem item: Any) -> Bool {
        if let item = item as? KMSearchMode {
            if !item.select && item.datas.count > 0 {
                item.select = true
                outlineView.animator().expandItem(item, expandChildren: true)
                return false
            }
        }
        return true
    }

    func outlineView(_ outlineView: NSOutlineView, shouldCollapseItem item: Any) -> Bool {
        if let item = item as? KMSearchMode {
            if item.select && item.datas.count > 0 {
                item.select = false
                outlineView.animator().collapseItem(item, collapseChildren: true)
                return false
            }
        }
        return true
    }
    
//    func outlineView(_ outlineView: NSOutlineView, writeItems items: [Any], to pasteboard: NSPasteboard) -> Bool {
//        if self.outlineView.selectedRowIndexes.count > 1 {
//            return false
//        }
//
//        let indexSet = [self.outlineView.clickedRow]
//        let indexSetData : Data = NSKeyedArchiver.archivedData(withRootObject: indexSet) as Data
//        pasteboard.declareTypes([NSPasteboard.PasteboardType(rawValue: "kKMPDFViewOutlineDragDataType")], owner: self)
//        pasteboard.setData(indexSetData, forType: NSPasteboard.PasteboardType(rawValue: NSPasteboard.PasteboardType.RawValue("kKMPDFViewOutlineDragDataType")))
//        return true
//    }
//
//    func outlineView(_ outlineView: NSOutlineView, validateDrop info: NSDraggingInfo, proposedItem item: Any?, proposedChildIndex index: Int) -> NSDragOperation {
//        var dragOperation = NSDragOperation.init(rawValue: 0)
//        if index > 0 {
//            dragOperation = NSDragOperation.move
//        }
//        return dragOperation
//    }
//
//    func outlineView(_ outlineView: NSOutlineView, acceptDrop info: NSDraggingInfo, item: Any?, childIndex index: Int) -> Bool {
//        if ((index < 0)) {
//            return false
//        }
//        let outline = item as! CPDFOutline
//        if outline.parent == nil {
//
//        } else {
//
//        }
//
//        return true
//    }
}

//MARK: ControlTextDelegate
extension KMSearchViewController: NSTextFieldDelegate {
    func controlTextDidEndEditing(_ obj: Notification) {
        let object = obj.object as! NSTextField
        if object == self.searchTextField {
//            self.searchDoneAction()
//            self.sortResults = []
//            self.reloadData()
        }
    }
    
    func controlTextDidChange(_ obj: Notification) {
        let object = obj.object as! NSTextField
        if object == self.searchTextField {
            if self.searchTextField.stringValue == "" {
                self.doneButton.isHidden = true
                self.searchResults = []
                self.reloadData()
                self.cancelAllSearchModel()
            }
        }
    }
    
    func control(_ control: NSControl, textView: NSTextView, doCommandBy commandSelector: Selector) -> Bool {
        switch commandSelector {
        case #selector(NSResponder.insertNewline(_:)):
            if let inputView = control as? NSTextField {
                //当当前TextField按下enter
                if inputView == searchTextField {
                    self.searchDoneAction()
                }
            }
            return true
        default:
            return false
        }
    }
}

extension KMSearchViewController: NSMenuDelegate, NSMenuItemValidation {
    //MARK: NSMenuItemValidation
    
    func validateMenuItem(_ menuItem: NSMenuItem) -> Bool {
        let action = menuItem.action
        
        if (action == #selector(addAnonationStyle)) {
            let model : KMSearchMode = self.outlineView.item(atRow: self.outlineView.clickedRow) as! KMSearchMode
            return model.datas.count == 0
        }
        return true
    }
}


class FocusAwareSearchTextField: NSSearchField {
    var onFocus: () -> Void = {}
    var onUnfocus: () -> Void = {}

    override func becomeFirstResponder() -> Bool {
        onFocus()
        let textView = window?.fieldEditor(true, for: nil) as? NSTextView
        textView?.insertionPointColor = NSColor.km_init(hex: "#252629")
        return super.becomeFirstResponder()
    }

    override func resignFirstResponder() -> Bool {
        onUnfocus()
        return super.resignFirstResponder()
    }
}