//
//  KMBrowserWindowController+Actions.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2024/2/20.
//

import Foundation

// MARK: - 幻灯片
extension KMBrowserWindowController {
    func canEnterFullscreen() -> Bool {
        if self.isSwitchingFullScreen {
            return false
        }
        if let mainVc = (self.document as? KMMainDocument)?.mainViewController {
            if mainVc.canEnterFullscreen() == false {
                return false
            }
        }
        let mode = self.interactionMode
        if mode == .fullScreen || mode == .legacyFullScreen {
            return false
        }
        
        let cnt = self.window?.tabbedWindows?.count ?? 0
        return cnt < 2
    }
    
    override func canEnterPresentation() -> Bool {
        let can = super.canEnterPresentation()
        if can == false {
            return false
        }
        
        if let mainVc = (self.document as? KMMainDocument)?.mainViewController {
            if mainVc.canEnterPresentation() == false {
                return false
            }
        }
        return can
    }
    
    func canExitFullscreen() -> Bool {
        if self.isSwitchingFullScreen == false {
            return false
        }
        let mode = self.interactionMode
        if mode == .fullScreen || mode == .legacyFullScreen {
            return true
        }
        return false
    }
    
    func enterPresentation() {
        self.window?.enterPresentation()
    }
    
    func exitFullscreen() {
        let wasInteractionMode = self.interactionMode
        if self.canExitFullscreen() == false && self.canExitPresentation() == false {
            return
        }

        if wasInteractionMode == .fullScreen {
            self.window?.toggleFullScreen(nil)
            return
        }

        var view: NSView?
        var contentView: NSView?
        self.window?.isSwitchingFullScreen = true
        if wasInteractionMode == .legacyFullScreen {
            let doc = self.document as? KMMainDocument
            view = doc?.mainViewController?.pdfSplitView
        } else {
            let doc = self.document as? KMMainDocument
            view = doc?.mainViewController?.listView
        }
 

        let doc = self.document as? KMMainDocument
        let mainViewController = doc?.mainViewController
        
        mainViewController?.presentationTopViewController?.view.removeFromSuperview()
        
        if let v = view {
            self.fadeOutFullScreenView(v)
            view?.frame = contentView?.bounds ?? .zero
            view?.autoresizingMask = [.width, .height]
            contentView?.addSubview(v)
            
            (v as? CPDFListView)?.isPresentationMode = false
            (v as? CPDFListView)?.layoutDocumentView()
            (v as? CPDFListView)?.requiresDisplay()
            if (v as? CPDFListView)?.isEnterPresentationDrawMode() == true {
                (v as? CPDFListView)?.exitPresentationDrawMode()
            }
        }

        if let mainVc = (self.document as? KMMainDocument)?.mainViewController {
            mainVc.exitFullscreenMode()
        }
        
        self.window?.isSwitchingFullScreen = false

        self.forceSubwindowsOnTop(false)
 
        self.window?.interactionMode = .normal
 
        self.fadeOutFullScreenWindow()
 
        self.synchronizeWindowTitleWithDocumentName()
 
    }
    
    func fadeOutFullScreenView(_ view: NSView) {
        guard let fullScreenWindow = self.window as? KMFullScreenWindow else {
            NSSound.beep()
            return
        }
        let fadeWindow = KMFullScreenWindow(screen: fullScreenWindow.screen ?? NSScreen.main!, bgColor: fullScreenWindow.backgroundColor, level: fullScreenWindow.level.rawValue, isMain: false)
        
        fadeWindow.alphaValue = 0
        fadeWindow.order(.above, relativeTo: fullScreenWindow.windowNumber)
        fadeWindow.fadeInBlocking()
        view.removeFromSuperview()
        fullScreenWindow.display()
        fullScreenWindow.delegate = nil
        fullScreenWindow.makeFirstResponder(nil)
        fadeWindow.orderOut(nil)
    }
    
    func fadeOutFullScreenWindow() {
        guard let fullScreenWindow = self.window as? KMFullScreenWindow else {
            NSSound.beep()
            return
        }
        
        let mainVc = (self.document as? KMMainDocument)?.mainViewController
        let mainWindow = fullScreenWindow.interactionParent
        let collectionBehavior = mainWindow?.collectionBehavior
        
        self.window = mainWindow
        mainWindow?.alphaValue = 0
        if let data = mainWindow?.responds(to: NSSelectorFromString("setAnimationBehavior:")), data {
            mainWindow?.animationBehavior = .none
        }
        // trick to make sure the main window shows up in the same space as the fullscreen window
        fullScreenWindow.addChildWindow(mainWindow!, ordered: .below)
        fullScreenWindow.removeChildWindow(mainWindow!)
        fullScreenWindow.level = .popUpMenu
        // these can change due to the child window trick
        mainWindow?.level = .normal
        mainWindow?.alphaValue = 1.0
        mainWindow?.collectionBehavior = collectionBehavior!
        mainWindow?.display()
        mainWindow?.makeFirstResponder(mainVc?.listView)
        mainWindow?.recalculateKeyViewLoop()
        mainWindow?.delegate = self
        mainWindow?.makeKey()
        
        if let data = mainWindow?.responds(to: NSSelectorFromString("setAnimationBehavior:")), data {
            mainWindow?.animationBehavior = .default
        }
        NSApp.removeWindowsItem(fullScreenWindow)
        fullScreenWindow.fadeOut()
    }
}