//
//  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", nil)
        resetAllBtn.title = KMLocalizedString("Reset All", nil)
        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?", "Message in alert dialog when pressing Reset All button"), 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.", "Informative text in alert dialog when pressing Reset All button"), label)
        alert.addButton(withTitle: KMLocalizedString("Reset", "Button title"))
        alert.addButton(withTitle: KMLocalizedString("Cancel", "Button title"))
        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?", "Message in alert dialog when pressing Reset All button")
        alert.informativeText = KMLocalizedString("Choosing Reset will restore all settings to the state they were in when PDF Reader Pro Edition was first installed.", "Informative text in alert dialog when pressing Reset All button")
        alert.addButton(withTitle: KMLocalizedString("Reset", "Button title"))
        alert.addButton(withTitle: KMLocalizedString("Cancel", "Button title"))
        
        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()
    }
}