//
//  KMPreferenceController.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2023/11/7.
//

import Cocoa

class KMPreferenceWindow: NSWindow {
//    override func responds(to aSelector: Selector!) -> Bool {
//        return aSelector != #selector(toggleToolbarShow) && aSelector != #selector(runToolbarCustomizationPalette) && super.responds(to: aSelector)
//    }
}

private let SKPreferencesToolbarIdentifier = "SKPreferencesToolbarIdentifier"
private let SKPreferenceWindowFrameAutosaveName = "SKPreferenceWindow"
private let BOTTOM_MARGIN = 27.0
private let SKLastSelectedPreferencePaneKey = "SKLastSelectedPreferencePane"
private let NIBNAME_KEY = "nibName"

@objc protocol KMPreferencePane: NSObjectProtocol {
    @objc optional func defaultsDidRevert()
    @objc optional func reloadData()
}

@objcMembers class KMPreferenceController: NSWindowController {
    
    @IBOutlet var resetBtn: NSButton!
    @IBOutlet var resetAllBtn: NSButton!
    var preferencePanes: [KMPreferencePane]?
    var history: [NSViewController]?
    var historyIndex: Int = 0
    var currentPane: KMPreferencePane?
    
    private let INITIALUSERDEFAULTS_KEY = "InitialUserDefaults"
    private let RESETTABLEKEYS_KEY = "ResettableKeys"
    /*
     @interface SKPreferenceController : NSWindowController <NSWindowDelegate, NSTabViewDelegate, NSToolbarDelegate> {
         NSArray *resetButtons;
     }

     @property (nonatomic, retain) IBOutlet NSArray *resetButtons;

     + (id)sharedPrefenceController;

     - (IBAction)resetAll:(id)sender;
     - (IBAction)resetCurrent:(id)sender;

     - (IBAction)doGoToNextPage:(id)sender;
     - (IBAction)doGoToPreviousPage:(id)sender;
     - (IBAction)doGoToFirstPage:(id)sender;
     - (IBAction)doGoToLastPage:(id)sender;
     - (IBAction)doGoBack:(id)sender;
     - (IBAction)doGoForward:(id)sender;

     - (IBAction)changeFont:(id)sender;
     - (IBAction)changeAttributes:(id)sender;

     - (void)selectPaneWithIdentifier:(NSString *)itemIdentifier;

     @end
     */
    
    deinit {
        KMPrint("KMPreferenceController deinit.")
//        currentPane = nil;
    }
    
    static let shared = KMPreferenceController(windowNibName: "PreferenceWindow")

    override func windowDidLoad() {
        super.windowDidLoad()
        
        self.preferencePanes = [KMGeneralPreferences(), KMDisplayPreferences(), KMNotesPreferences(), KMSyncPreferences()]
        self.history = []
        self.historyIndex = 0
        
        if #available(macOS 11.0,*) {
            self.window?.toolbarStyle = .expanded
        }
        
        resetBtn.title = KMLocalizedString("Reset")
        resetAllBtn.title = KMLocalizedString("Reset All")
        let window = self.window
        let toolbar = NSToolbar(identifier: SKPreferencesToolbarIdentifier)
        toolbar.allowsUserCustomization = false
        toolbar.autosavesConfiguration = false
        toolbar.isVisible = true
        toolbar.delegate = self
        window?.toolbar = toolbar
        window?.showsToolbarButton = false
        
        window?.contentView?.wantsLayer = true
        
        // we want to restore the top of the window, while without the force it restores the bottom position without the size
        window?.setFrameUsingName(SKPreferenceWindowFrameAutosaveName, force: true)
        self.windowFrameAutosaveName = SKPreferenceWindowFrameAutosaveName
        
    //    [NSGraphicsContext SKAutoSizeButtons:resetButtons rightAlign:false];
        
        var width = 0.0
        var frame: NSRect = .zero
        var pane: NSViewController?
        var view: NSView?
        for pane in self.preferencePanes ?? [] {
            let _pane = pane as? NSViewController
            width = fmax(width, NSWidth(_pane?.view.frame ?? .zero))
        }
        for pane in self.preferencePanes ?? [] {
            let _pane = pane as? NSViewController
            view = _pane?.view
            frame = view?.frame ?? .zero
            if let data = view?.autoresizingMask.contains(.width), data {
                frame.size.width = width
            } else {
                frame.origin.x = floor(0.5 * (width - NSWidth(frame)))
            }
            frame.origin.y = BOTTOM_MARGIN
            view?.frame = frame
        }
        
        self.currentPane = self._preferencePane(forItemIdentifier: UserDefaults.standard.string(forKey: SKLastSelectedPreferencePaneKey) ?? "") ?? self.preferencePanes?.first
        toolbar.selectedItemIdentifier = NSToolbarItem.Identifier((self.currentPane as? NSViewController)?.nibName ?? "")
        
        if  let _currentPane = self.currentPane as? NSViewController {
            window?.title = _currentPane.title ?? ""
            self.history?.append(_currentPane)
        }
        
        view = (self.currentPane as? NSViewController)?.view
        frame = window?.frame ?? .zero
        frame.size.width = width
        frame = KMShrinkRect(rect: frame, amount: NSHeight(window?.contentView?.frame ?? .zero) - NSMaxY(view?.frame ?? .zero), edge: .minY)
        
        window?.setFrame(frame, display: false)
        
        if let data = view {
            window?.contentView?.addSubview(data)
        }
        
        NotificationCenter.default.addObserver(self, selector: #selector(preferenceDidChangeNotification), name: KMPreferenceManager.didChangeNotification, object: nil)
        
        self.resetBtn.toolTip = NSLocalizedString("Revert all currently shown preferences to their original values", comment: "")
        self.resetAllBtn.toolTip = NSLocalizedString("Revert all preferences to their original values", comment: "")
    }
    
    @IBAction func changeFont(_ sender: AnyObject?) {
        self.window?.contentView?.activeFontWell()?.changeFontFromFontManager(sender)
    }
    
    /*
     - (void)selectPaneWithIdentifier:(NSString *)itemIdentifier {
         [self selectPane:[self preferencePaneForItemIdentifier:itemIdentifier]];
     }

     #pragma mark Actions

     - (IBAction)doGoToNextPage:(id)sender {
         NSUInteger itemIndex = [preferencePanes indexOfObject:currentPane];
         if (itemIndex != NSNotFound && ++itemIndex < [preferencePanes count])
             [self selectPane:[preferencePanes objectAtIndex:itemIndex]];
     }

     - (IBAction)doGoToPreviousPage:(id)sender {
         NSUInteger itemIndex = [preferencePanes indexOfObject:currentPane];
         if (itemIndex != NSNotFound && itemIndex-- > 0)
             [self selectPane:[preferencePanes objectAtIndex:itemIndex]];
     }

     - (IBAction)doGoToFirstPage:(id)sender {
         [self selectPane:[preferencePanes objectAtIndex:0]];
     }

     - (IBAction)doGoToLastPage:(id)sender {
         [self selectPane:[preferencePanes lastObject]];
     }

     - (IBAction)doGoBack:(id)sender {
         if (historyIndex > 0) {
             historyIndex--;
             [self selectPane:nil];
         }
     }

     - (IBAction)doGoForward:(id)sender {
         if (historyIndex + 1 < [history count]) {
             historyIndex++;
             [self selectPane:nil];
         }
     }
     
     - (IBAction)changeAttributes:(id)sender {
     //    [[[[self window] contentView] activeFontWell] changeAttributesFromFontManager:sender];
     }

     - (BOOL)validateMenuItem:(NSMenuItem *)menuItem {
         if ([menuItem action] == @selector(doGoToNextPage:) || [menuItem action] == @selector(doGoToLastPage:))
             return [currentPane isEqual:[preferencePanes lastObject]] == NO;
         else if ([menuItem action] == @selector(doGoToPreviousPage:) || [menuItem action] == @selector(doGoToFirstPage:))
             return [currentPane isEqual:[preferencePanes objectAtIndex:0]] == NO;
         else if ([menuItem action] == @selector(doGoBack:))
             return historyIndex > 0;
         else if ([menuItem action] == @selector(doGoForward:))
             return historyIndex + 1 < [history count];
         return YES;
     }

     #pragma mark Toolbar
     @end
     */

    @IBAction func resetCurrent(_ sender: AnyObject?) {
        if (self.currentPane == nil) {
            return
        }
        
        let label = (self.currentPane as? NSViewController)?.title ?? ""
        let alert = NSAlert()
        alert.messageText = String(format: KMLocalizedString("Reset %@ preferences to their original values?"), label)
        alert.informativeText = String(format: KMLocalizedString("Choosing Reset will restore all settings in this pane to the state they were in when PDF Reader Pro Edition was first installed."), label)
        alert.addButton(withTitle: KMLocalizedString("Reset"))
        alert.addButton(withTitle: KMLocalizedString("Cancel"))
        alert.beginSheetModal(for: self.window!, modalDelegate: self, didEnd: #selector(_resetCurrentSheetDidEnd), contextInfo: nil)
    }
    
    @IBAction func resetAll(_ sender: AnyObject?) {
        let alert = NSAlert()
        alert.messageText = KMLocalizedString("Reset all preferences to their original values?")
        alert.informativeText = KMLocalizedString("Choosing Reset will restore all settings to the state they were in when PDF Reader Pro Edition was first installed.")
        alert.addButton(withTitle: KMLocalizedString("Reset"))
        alert.addButton(withTitle: KMLocalizedString("Cancel"))
        
        let response = alert.runModal()
        if (response == .alertFirstButtonReturn) {
            NSUserDefaultsController.shared.revertToInitialValues(forKeys: nil)
            for pane in self.preferencePanes ?? [] {
                pane.defaultsDidRevert?()
            }
            
            KMPreference.shared.resetAllData()
        }
    }
    
    @objc private func preferenceDidChangeNotification(sender: Notification) {
        self.currentPane?.reloadData?()
    }
}

// MARK: - Private Methods

extension KMPreferenceController {
    private func _preferencePane(forItemIdentifier itemIdent: String) -> KMPreferencePane? {
        self._panelControlSelectColor(itemIdent)

        for pane in self.preferencePanes ?? [] {
            let _pane = pane as? NSViewController
            if _pane?.nibName == itemIdent {
                return pane
            }
        }
        return nil
    }
    
    private func _panelControlSelectColor(_ identifier: String) {
        for item in self.window?.toolbar?.items ?? [] {
            if item.itemIdentifier.rawValue == identifier {
                if item.itemIdentifier.rawValue == "GeneralPreferences" {
                    item.image = NSImage(named: "KMImageNameElseSettingsGeneralSel")
                } else if item.itemIdentifier.rawValue == "DisplayPreferences" {
                    item.image = NSImage(named: "KMImageNameElseSettingsViewSel")
                } else if item.itemIdentifier.rawValue == "NotesPreferences" {
                    item.image = NSImage(named: "KMImageNameElseSettingsAnnotationSel")
                } else if item.itemIdentifier.rawValue == "SyncPreferences" {
                    item.image = NSImage(named: "KMImageNameElseSettingsSynchronizeSel")
                } else if item.itemIdentifier.rawValue == "DropboxPreferences" {
                    item.image = NSImage(named: "KMImageNameElseSettingsDropboxSel")
                }
            } else {
                if item.itemIdentifier.rawValue == "GeneralPreferences" {
                    item.image = NSImage(named: "KMImageNameElseSettingsGeneralNor")
                } else if item.itemIdentifier.rawValue == "DisplayPreferences" {
                    item.image = NSImage(named: "KMImageNameElseSettingsViewNor")
                } else if item.itemIdentifier.rawValue == "NotesPreferences" {
                    item.image = NSImage(named: "KMImageNameElseSettingsAnnotationNor")
                } else if item.itemIdentifier.rawValue == "SyncPreferences" {
                    item.image = NSImage(named: "KMImageNameElseSettingsSynchronizeNor")
                } else if item.itemIdentifier.rawValue == "DropboxPreferences" {
                    item.image = NSImage(named: "KMImageNameElseSettingsDropboxNor")
                }
            }
        }
    }
    
    @objc private func _selectPaneAction(_ sender: AnyObject?) {
        let _item = sender as? NSToolbarItem
        self._panelControlSelectColor(_item?.itemIdentifier.rawValue ?? "")
        
        if let pane = self._preferencePane(forItemIdentifier: _item?.itemIdentifier.rawValue ?? "") {
            self._selectPane(pane)
        }
    }
    
    private func _selectPane(_ pane: KMPreferencePane) {
        var _pane = pane as? NSViewController
        let _currentPane = self.currentPane as? NSViewController
        if _pane != _currentPane {
            if let data = _pane {
                self.historyIndex += 1
                if let cnt = self.history?.count, cnt > self.historyIndex {
                    let range = self.historyIndex ..< cnt-self.historyIndex
                    self.history?.removeSubrange(range)
                }
                self.history?.append(data)
            } else {
                _pane = self.history?[self.historyIndex]
            }
            
            let window = self.window
            let contentView = window?.contentView
            let oldView = _currentPane?.view
            let view = _pane?.view
            var frame = window?.frame ?? .zero
            frame = KMShrinkRect(rect: frame,  amount: NSHeight(contentView?.frame ?? .zero) - NSMaxY(view?.frame ?? .zero), edge: .minY)
            
            // make sure edits are committed
            _currentPane?.commitEditing()
            NSUserDefaultsController.shared.commitEditing()
            
            self.currentPane = pane
            
            window?.title = (self.currentPane as? NSViewController)?.title ?? ""
            if let data = (self.currentPane as? NSViewController)?.nibName {
                UserDefaults.standard.setValue(data, forKey: SKLastSelectedPreferencePaneKey)
                window?.toolbar?.selectedItemIdentifier = NSToolbarItem.Identifier(data)
            }
            
            if UserDefaults.standard.bool(forKey: SKDisableAnimationsKey) {
                if oldView != nil && view != nil {
                    contentView?.replaceSubview(oldView!, with: view!)
                }
                window?.setFrame(frame, display: true)
            } else {
                let duration = window?.animationResizeTime(frame) ?? 0
                contentView?.displayIfNeeded()
                NSAnimationContext.runAnimationGroup { context in
                    context.duration = duration
                    if oldView != nil && view != nil {
                        contentView?.animator().replaceSubview(oldView!, with: view!)
                    }
                    window?.animator().setFrame(frame, display: true)
                }
            }
        }
    }
    
    @objc private func _resetCurrentSheetDidEnd(_ alert: NSAlert, _ returnCode: Int, _ contextInfo: Any) {
        if (returnCode == NSApplication.ModalResponse.alertFirstButtonReturn.rawValue) {
            if let initialUserDefaultsURL = Bundle.main.url(forResource: INITIALUSERDEFAULTS_KEY, withExtension: "plist") {
                if let _currentPane = self.currentPane as? NSViewController {
                let resettableKeys = (NSDictionary(contentsOf: initialUserDefaultsURL)?.object(forKey: RESETTABLEKEYS_KEY) as? NSDictionary)?.object(forKey: _currentPane.nibName ?? "")
                if let data = resettableKeys as? [String] {
                    NSUserDefaultsController.shared.revertToInitialValues(forKeys: data)
                }
                self.currentPane?.defaultsDidRevert?()
                
                if _currentPane is KMGeneralPreferences {
                    KMPreference.shared.resetData(.general)
                } else if _currentPane is KMDisplayPreferences {
                    KMPreference.shared.resetData(.display)
                } else if _currentPane is KMNotesPreferences {
                    KMPreference.shared.resetData(.markup)
                }
            }
        }
        }
    }
}

extension KMPreferenceController: NSToolbarDelegate {
    func toolbar(_ toolbar: NSToolbar, itemForItemIdentifier itemIdentifier: NSToolbarItem.Identifier, willBeInsertedIntoToolbar flag: Bool) -> NSToolbarItem? {
        let pane = self._preferencePane(forItemIdentifier: itemIdentifier.rawValue) as? NSViewController
        let item = NSToolbarItem(itemIdentifier: itemIdentifier)
        item.label = pane?.title ?? ""
        var ima: NSImage?
        if itemIdentifier.rawValue == "GeneralPreferences" {
            ima = NSImage(named: "KMImageNameElseSettingsGeneralNor")
        } else if itemIdentifier.rawValue == "DisplayPreferences" {
            ima = NSImage(named: "KMImageNameElseSettingsViewNor")
        } else if itemIdentifier.rawValue == "NotesPreferences" {
            ima = NSImage(named: "KMImageNameElseSettingsAnnotationNor")
        } else if itemIdentifier.rawValue == "SyncPreferences" {
            ima = NSImage(named: "KMImageNameElseSettingsSynchronizeNor")
        } else if itemIdentifier.rawValue == "DropboxPreferences" {
            ima = NSImage(named: "KMImageNameElseSettingsDropboxNor")
        }
        item.image = ima
        item.target = self
        item.action = #selector(_selectPaneAction)
        return item;
    }
    
    func toolbarDefaultItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
        var items: [NSToolbarItem.Identifier] = []
        for item in self.preferencePanes ?? [] {
            if let name = (item as? NSViewController)?.nibName {
                items.append(NSToolbarItem.Identifier(rawValue: name))
            }
        }
        return items
    }
    
    func toolbarAllowedItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
        return self.toolbarDefaultItemIdentifiers(toolbar)
    }
    
    func toolbarSelectableItemIdentifiers(_ toolbar: NSToolbar) -> [NSToolbarItem.Identifier] {
        return self.toolbarDefaultItemIdentifiers(toolbar)
    }
}

extension KMPreferenceController: NSWindowDelegate {
    func windowDidResignMain(_ notification: Notification) {
        self.window?.contentView?.deactivateWellSubcontrols()
    }
    
    func windowWillClose(_ notification: Notification) {
        (self.currentPane as? NSViewController)?.commitEditing()
        NSUserDefaultsController.shared.commitEditing()
    }
}