//
//  KMSearchReplaceWindowController.swift
//  PDF Reader Pro
//
//  Created by User-Tangchao on 2024/8/7.
//

import Cocoa
import KMComponentLibrary

class KMSearchReplaceWindowController_Window: NSWindow {
    override var canBecomeMain: Bool {
        return true
    }
    
    override var canBecomeKey: Bool {
        return true
    }
}

class KMSearchReplaceWindowController: KMNBaseWindowController {
    @IBOutlet weak var titleBarBox: NSBox!
    @IBOutlet weak var tabBox: NSBox!
    @IBOutlet weak var searchBox: NSBox!
    @IBOutlet weak var replaceBox: NSBox!
    
    var replaceCallback: (() -> Void)?
    var itemClick: KMCommonClickBlock?
    
    private var _modalSession: NSApplication.ModalSession?
    
    private var handdler = KMNSearchHanddler()
    private var type_: KMNBotaSearchType = .search
    
    private var currentSel: CPDFSelection?
    private var finding_ = false
    
    private lazy var titleBarView_: KMNSearchReplaceTitleBarView = {
        let view = KMNSearchReplaceTitleBarView()
        return view
    }()
    private lazy var searchItemView_: KMNSearchReplaceSearchItemView = {
        let view = KMNSearchReplaceSearchItemView()
        return view
    }()
    private lazy var replaceItemView_: KMNSearchReplacePopItemView = {
        let view = KMNSearchReplacePopItemView()
        return view
    }()
    
    var previousButton: ComponentButton {
        get {
            return searchItemView_.previousButton
        }
    }
    var nextButton: ComponentButton {
        get {
            return searchItemView_.nextButton
        }
    }
    var replaceAllButton: ComponentButton {
        get {
            return replaceItemView_.replaceAllButton
        }
    }
    var replaceButton: ComponentButton {
        get {
            return replaceItemView_.replaceButton
        }
    }
    
    convenience init(with pdfView: CPDFView?, type: KMNBotaSearchType) {
        self.init(windowNibName: "KMSearchReplaceWindowController")
        
        self.handdler.pdfView = pdfView
        self.type_ = type
    }

    override func windowDidLoad() {
        super.windowDidLoad()

        self.initDefaultValue()
        self.switchType(self.type_)
    }
    
    func initDefaultValue() {
        window?.isMovableByWindowBackground = true
        
        window?.contentView?.wantsLayer = true
        window?.contentView?.layer?.cornerRadius = ComponentLibrary.shared.getComponentValueFromKey("radius/m") as? CGFloat ?? 8
        window?.contentView?.layer?.masksToBounds = true
        window?.backgroundColor = .clear
        
        titleBarBox.boxType = .custom
        titleBarBox.borderWidth = 0
        titleBarBox.contentView = titleBarView_
        titleBarView_.titleLabel.font = .SFProTextRegularFont(14)
        titleBarView_.itemClick = { [unowned self] idx, _ in
            if idx == 1 {
                _closeAction(NSButton())
            } else if idx == 2 {
                _closeAction(NSButton())
                
                itemClick?(1, handdler)
            }
        }
        
        searchBox.borderWidth = 0
        searchBox.contentView = searchItemView_
        searchItemView_.itemClick = { [unowned self] idx, _ in
            if idx == 1 { // Previous
                _previousAction(NSButton())
            } else if idx == 2 { // next
                _nextAction(NSButton())
            }
        }
        searchItemView_.valueDidChange = { [unowned self] value, _ in
            if let data = value as? String {
                handdler.searchKey = data
                search(keyboard: data)
            }
        }
        searchItemView_.inputDidEditBlock = { [unowned self] in
            updateButtonStatus()
            let value = searchItemView_.inputValue
            if value.isEmpty {
            } else {
                currentSel = nil
            }
        }
        
        replaceBox.borderWidth = 0
        replaceBox.contentView = replaceItemView_
        replaceItemView_.itemClick = { [unowned self] idx, _ in
            if idx == 1 {
                _replaceAllAction(NSButton())
            } else if idx == 2 {
                _replaceAction(NSButton())
            }
        }
        replaceItemView_.valueDidChange = { [unowned self] value, _ in
            if let data = value as? String {
                handdler.replaceKey = data
            }
        }
        
        updateButtonStatus()
        if searchItemView_.inputValue.isEmpty {
        } else {
            self.currentSel = nil
        }
    }
    
    override func updateUILanguage() {
        super.updateUILanguage()
        
        KMMainThreadExecute {
            self.titleBarView_.titleLabel.stringValue = KMLocalizedString("Search")
        }
    }
    
    override func updateUIThemeColor() {
        super.updateUIThemeColor()
        
        KMMainThreadExecute {
            self.titleBarView_.titleLabel.textColor = KMNColorTools.colorText_1()
            
            self.updateViewColor()
        }
    }
    
    func updateButtonStatus() {
        let value = searchItemView_.inputValue
        if value.isEmpty {
            previousButton.properties.isDisabled = true
            previousButton.reloadData()
            nextButton.properties.isDisabled = true
            nextButton.reloadData()
            replaceButton.properties.isDisabled = true
            replaceButton.reloadData()
            replaceAllButton.properties.isDisabled = true
            replaceAllButton.reloadData()
        } else {
            previousButton.properties.isDisabled = false
            previousButton.reloadData()
            nextButton.properties.isDisabled = false
            nextButton.reloadData()
            replaceButton.properties.isDisabled = false
            replaceButton.reloadData()
            replaceAllButton.properties.isDisabled = false
            replaceAllButton.reloadData()
        }
    }
    
    func update(keyborad: String?, replaceKey: String?, results: [KMSearchMode]) {
        searchItemView_.inputValue = keyborad ?? ""
        replaceItemView_.inputValue = replaceKey ?? ""
        
        if results.isEmpty == false {
            handdler.searchResults = results
            self.currentSel = results.first?.selection
            if let sel = self.currentSel {
                self.handdler.showSelection(sel)
            }
        }
        
        updateButtonStatus()
    }
    
    // MARK: - Actions
    
    @objc private func _closeAction(_ sender: NSButton) {
        self.window?.orderOut(nil)
        self.handdler.clearData()
    }
    
    @objc private func _previousAction(_ sender: NSButton) {
        let isEditing = self.handdler.pdfView?.isEditing() ?? false
        if isEditing == false {
            guard let model = self.handdler.searchResults.safe_element(for: self.handdler.showIdx-1) as? KMSearchMode else {
                return
            }
            self.handdler.showIdx -= 1
            self.handdler.showSelection(model.selection)
        } else {
            if let _ = self.currentSel {
                self.currentSel = self.handdler.pdfView?.document.findForwardEditText()
                if let sel = self.currentSel {
                    self.handdler.showSelection(sel)
                } else {
                    _showNoResultsAlert()
                    return
                }
            } else {
                if self.finding_ {
                    return
                }
                self.finding_ = true
                let searchS = self.searchItemView_.inputValue
                let opt = self.fetchSearchOptions()
                self._beginLoading()
                DispatchQueue.global().async {
                    let datas = self.handdler.pdfView?.document.startFindEditText(from: nil, with: searchS, options: opt)
                    DispatchQueue.main.async {
                        self._endLoading()
                        self.finding_ = false
                        let sel = datas?.first?.first
                        if sel == nil {
                            self._showNoResultsAlert()
                            return
                        }
                        self.currentSel = sel
                        self.handdler.showSelection(sel)
                    }
                }
            }
        }
    }
    
    @objc private func _nextAction(_ sender: NSButton) {
        let isEditing = self.handdler.pdfView?.isEditing() ?? false
        if isEditing == false {
            guard let model = self.handdler.searchResults.safe_element(for: self.handdler.showIdx+1) as? KMSearchMode else {
                return
            }
            self.handdler.showIdx += 1
            self.handdler.showSelection(model.selection)
        } else {
            if let _ = self.currentSel {
                self.currentSel = self.handdler.pdfView?.document.findBackwordEditText()
                if let sel = self.currentSel {
                    self.handdler.showSelection(sel)
                } else {
                    _showNoResultsAlert()
                }
            } else {
                if self.finding_ {
                    return
                }
                self.finding_ = true
                let searchS = self.searchItemView_.inputValue
                let opt = self.fetchSearchOptions()
                self._beginLoading()
                DispatchQueue.global().async {
                
                    let datas = self.handdler.pdfView?.document.startFindEditText(from: nil, with: searchS, options: opt)
                    DispatchQueue.main.async {
                        self._endLoading()
                        self.finding_ = false
                        let sel = datas?.first?.first
                        if sel == nil {
                            self._showNoResultsAlert()
                            return
                        }
                        self.currentSel = sel
                        self.handdler.showSelection(sel)
                    }
                }
            }
        }
    }
    
    @objc private func _checkAction(_ sender: NSButton) {
        self.currentSel = nil
    }
    
    @objc private func _searchTabAction(_ sender: NSButton) {
        self.switchType(.search, animate: true)
    }
    
    @objc private func _replaceTabAction(_ sender: NSButton) {
        self.switchType(.replace, animate: true)
    }
    
    @objc private func _replaceAction(_ sender: NSButton) {
        let isEditing =  self.handdler.pdfView?.isEditing() ?? false
        if isEditing == false {
            NSSound.beep()
            return
        }
        if let sel = self.currentSel {
            let searchS = self.searchItemView_.inputValue
            let replaceS = self.replaceItemView_.inputValue
            let success = self.handdler.replace(searchS: searchS, replaceS: replaceS, sel: sel) { [weak self] newSel in
                self?.handdler.showSelection(newSel)
            }
            if success {
//                self.handdler.showSelection(sel)
            }
        } else { // 先查找
            if self.finding_ {
                return
            }
            self.finding_ = true
            let searchS = self.searchItemView_.inputValue
            let opt = self.fetchSearchOptions()
            self._beginLoading()
            DispatchQueue.global().async {
                let datas = self.handdler.pdfView?.document.startFindEditText(from: nil, with: searchS, options: opt)
                DispatchQueue.main.async {
                    self._endLoading()
                    self.finding_ = false
                    let sel = datas?.first?.first
                    if sel == nil {
                        self._showNoResultsAlert()
                        return
                    }
                    self.currentSel = sel
                    self.handdler.showSelection(sel)
                }
            }
        }
    }
    
    @objc private func _replaceAllAction(_ sender: NSButton) {
        let isEditing =  self.handdler.pdfView?.isEditing() ?? false
        if isEditing == false {
            NSSound.beep()
            return
        }
        
        let datas = self.handdler.pdfView?.document.findEditSelections() ?? []
        if datas.isEmpty {
            _showNoResultsAlert()
            return
        }
        
        if self.finding_ {
            return
        }
        self.finding_ = true
        let searchS = self.searchItemView_.inputValue
        let replaceS = self.replaceItemView_.inputValue
        self._beginLoading()
        DispatchQueue.global().async {
            self.handdler.pdfView?.document.replaceAllEditText(with: searchS, toReplace: replaceS)
            self.currentSel = nil
            
            DispatchQueue.main.async {
                self._endLoading()
                self.finding_ = false
                self.handdler.pdfView?.setHighlightedSelection(nil, animated: false)
                self.handdler.pdfView?.setNeedsDisplayForVisiblePages()
            }
        }
    }
    
    private func _showNoResultsAlert() {
        _ = _showAlert(style: .critical, message: KMLocalizedString("No related content found, please change keyword."), info: "", buttons: [KMLocalizedString("OK", comment: "")])
    }
    
    private func _showAlert(style: NSAlert.Style, message: String, info: String, buttons: [String]) -> NSApplication.ModalResponse {
        let alert = NSAlert()
        alert.alertStyle = style
        alert.messageText = message
        alert.informativeText = info
        for button in buttons {
            alert.addButton(withTitle: button)
        }
        return alert.runModal()
    }
    
    private func fetchSearchOptions() -> CPDFSearchOptions {
        var opt = CPDFSearchOptions()
        let isCase = KMDataManager.ud_bool(forKey: KMNSearchKey.caseSensitive.botaSearch)
        let isWholeWord = KMDataManager.ud_bool(forKey: KMNSearchKey.wholeWords.botaSearch)
        if isCase {
            opt.insert(.caseSensitive)
        }
        if isWholeWord {
            opt.insert(.matchWholeWord)
        }
        return opt
    }
    
    private func updateViewColor() {
        let isDark = KMAppearance.isDarkMode()
        if isDark {
            self.window?.contentView?.wantsLayer = true
            self.window?.contentView?.layer?.backgroundColor = NSColor(hex: "#393C3E").cgColor
        } else {
            self.window?.contentView?.wantsLayer = true
            self.window?.contentView?.layer?.backgroundColor = .white
        }
        
        self.switchType(self.type_)
    }
    
    func switchType(_ type: KMNBotaSearchType, animate: Bool = false) {
        if type == .replace {
            if IAPProductsManager.default().isAvailableAllFunction() == false {
                let winC = KMPurchaseCompareWindowController.sharedInstance()
                winC?.showWindow(nil)
                guard let win = winC?.window else {
                    return
                }
                self.window?.addChildWindow(win, ordered: .above)
                return
            }
        }
        
        self.type_ = type
        let isDark = KMAppearance.isDarkMode()
        var selectedColor = NSColor(hex: "0E1114")
        var unSelectedColor = NSColor(hex: "757780")
        if isDark {
            selectedColor = .white
            unSelectedColor = NSColor(hex: "#7E7F85")
        }
        
        if type == .search { // 248 112
            self.replaceBox.isHidden = true
            
            var frame = self.window?.frame ?? .zero
            let height: CGFloat = 112
            let heightOffset = frame.size.height - height
            frame.origin.y += heightOffset
            frame.size.height = height
            self.window?.setFrame(frame, display: true, animate: animate)
            self.window?.minSize = frame.size
            self.window?.maxSize = frame.size
        } else if type == .replace { // 388 208
            DispatchQueue.main.async {
                self.replaceBox.isHidden = false
            }
            
            var frame = self.window?.frame ?? .zero
            let height:CGFloat = 208
            let heightOffset = frame.size.height-height
            frame.origin.y += heightOffset
            frame.size.height = height
            self.window?.setFrame(frame, display: true, animate: animate)
            self.window?.minSize = frame.size
            self.window?.maxSize = frame.size
            
            // 将事件回调出去
            self.replaceCallback?()
        }
    }
    
    private func _beginLoading() {
        self.window?.contentView?.beginLoading()
    }
    
    private func _endLoading() {
        self.window?.contentView?.endLoading()
    }
    
    func startModal(_ sender: AnyObject?) {
        NSApp.stopModal()
        
        var modalCode: NSApplication.ModalResponse?
        if let _win = self.window {
            self._modalSession = NSApp.beginModalSession(for: _win)
            repeat {
                modalCode = NSApp.runModalSession(self._modalSession!)
            } while (modalCode == .continue)
        }
    }
    
    func endModal(_ sender: AnyObject?) {
        if let session = self._modalSession {
            NSApp.stopModal()
            NSApp.endModalSession(session)
            self.window?.orderOut(self)
        }
        if let winC = self.window?.kmCurrentWindowC, winC.isEqual(to: self) {
            self.window?.kmCurrentWindowC = nil
        }
    }
    
    func search(keyboard: String) {
        let isCase = KMDataManager.ud_bool(forKey: KMNSearchKey.caseSensitive.botaSearch)
        let isWholeWord = KMDataManager.ud_bool(forKey: KMNSearchKey.wholeWords.botaSearch)
        let isEditing = self.handdler.pdfView?.isEditing() ?? false
        if isEditing == false {
            if self.finding_ {
                return
            }
            self.finding_ = true
            self._beginLoading()
            self.handdler.search(keyword: keyboard, isCase: isCase, isWholeWord: isWholeWord, callback: { [weak self] datas in
                self?.finding_ = false
                self?._endLoading()
                
                guard let sels = self?.handdler.searchResults, sels.isEmpty == false else {
                    self?._showNoResultsAlert()
                    return
                }
                if let sel = sels.first?.selection {
                    self?.handdler.showIdx = 0
                    self?.handdler.showSelection(sel)
                }
            })
        } else {
            if self.finding_ {
                return
            }
            self.finding_ = true
            let searchS = keyboard
            let opt = self.fetchSearchOptions()
            self._beginLoading()
            DispatchQueue.global().async {
                let datas = self.handdler.pdfView?.document.findEditAllPageString(searchS, with: opt) ?? []
                DispatchQueue.main.async {
                    self.finding_ = false
                    self._endLoading()
                    if datas.isEmpty {
                        self._showNoResultsAlert()
                        return
                    }
                    self.currentSel = datas.first?.first
                    if let sel = self.currentSel {
                        self.handdler.showSelection(sel)
                    }
                }
                
            }
        }
    }
}