import Cocoa
import WebKit

protocol AdsWebViewDelegate: AnyObject {
    func kmAdViewClicked(_ adView: KMAdsWebView)
    func kmAdViewClose(_ adView: KMAdsWebView)
}

enum KMADViewDirections: Int {
    case up
    case down
}

// Banner Ads Width，Height
let kAD_View_Width = 728.0
let kAD_View_Height = 90.0
// Banner Ads refresh rate in second, 新广告会自动刷新，所以时间延长
let kAD_Refresh_Rate = 6000.0

class KMAdsWebView: NSView, WKNavigationDelegate, CAAnimationDelegate {
    weak var adDelegate: AdsWebViewDelegate?

    private var closeButton: NSButton
    private var timer: Timer?
    private var currentPage: Int = 0
    private var completionHandler: ((Int) -> Void)?

    private var adsWebView: WKWebView

    var adPosY: CGFloat = 30.0

    override init(frame frameRect: NSRect) {
        closeButton = NSButton(frame: NSRect(x: frameRect.size.width - 30, y: frameRect.size.height - 30, width: 30, height: 30))
        adsWebView = WKWebView(frame: frameRect)
        
        super.init(frame: frameRect)
        
        wantsLayer = true
        self.frame = NSRect(x: 0, y: 0, width: kAD_View_Width, height: kAD_View_Height)
        autoresizingMask = [.minXMargin, .maxXMargin]

        adsWebView.navigationDelegate = self
        adsWebView.autoresizingMask = [.width, .height]
        addSubview(adsWebView)

        adPosY = 30.0

        closeButton.isHidden = false
        closeButton.imagePosition = .imageOnly
//        closeButton.cell?.highlightsBy = .contentsCellMask
        closeButton.imageScaling = .scaleProportionallyUpOrDown
        closeButton.image = NSImage(named: "ad_cancel_button00")
        closeButton.isBordered = false
        closeButton.target = self
        closeButton.action = #selector(buttonItemClicked_Close(_:))
        addSubview(closeButton)

        NotificationCenter.default.addObserver(self, selector: #selector(handleUserHaveClickRateUsNotification(_:)), name: NSNotification.Name("kUserHaveClickRateUsNotification"), object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(adsWebView_Switch), name: NSNotification.Name("KMFirebaseRemateConfigRequestIsSuccessful"), object: nil)
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    deinit {
        adDelegate = nil
        adsWebView.navigationDelegate = nil
        adsWebView.stopLoading()
        timer?.invalidate()
        timer = nil
        completionHandler = nil
        NotificationCenter.default.removeObserver(self)
    }

    var adsData: [String] {
        get {
            var data: [String] = []
            #if VERSION_DMG
            if !UserDefaults.standard.bool(forKey: "kUserHaveClickRateUsKey") {
                data = ["https://test.sitemaji.com/native/pdfreaderpro.html?s=PDFReaderPro_Mac_DMG_HouseAD_728x90"]
            } else {
                data = ["https://test.sitemaji.com/native/pdfreaderpro.html?s=PDFReaderPro_Mac_DMG_728x90"]
            }
            #else
            if !UserDefaults.standard.bool(forKey: "kUserHaveClickRateUsKey") {
                data = ["https://test.sitemaji.com/native/pdfreaderpro.html?s=PDFReaderPro_Mac_Store_HouseAD_728x90"]
            } else {
                data = ["https://test.sitemaji.com/native/pdfreaderpro.html?s=PDFReaderPro_Mac_Store_728x90"]
            }
            #endif

            if !UserDefaults.standard.bool(forKey: "kUserHaveClickRateUsKey") {
                data = [KMKdanRemoteConfig.remoteConfig().displayHouseAdsUrl()]
            } else {
                data = [KMKdanRemoteConfig.remoteConfig().displayAdsUrl()]
            }

            #if DEBUG
            #if VERSION_DMG
            data = ["http://test-pdf-pro.kdan.cn:3021/native?s=PDFReaderPro_Mac_DMG_HouseAD_728x90&testflag=on"]
            #else
            data = ["https://test.sitemaji.com/native/pdfreaderpro.html?s=PDFReaderPro_Mac_Store_728x90"]
            #endif
            #endif
            return data
        }
        
        set {
            
        }
    }

    func restoreDefaultAdPosY() {
        adPosY = 30.0
    }

    func sortAdsData() {
        return
        
        let tLength = self.adsData.count
        
        for _ in 0..<24 {
            let tIndex0 = Int(arc4random()) % tLength
            var tIndex1 = Int(arc4random()) % tLength
            
            if tIndex0 == tIndex1 {
                tIndex1 = (tIndex1 + 1) % tLength
            }
            
            self.adsData.swapAt(tIndex0, tIndex1)
        }
    }

    func startAdsDataRequest() {
        adsWebView.navigationDelegate = self
        if adsData.count > 0 {
            let url = URL(string: adsData[currentPage])
            adsWebView.load(URLRequest(url: url!))
            KMAdsManager.defaultManager.refreshLoadingDate()
        }
    }

    func stopLoading() {
        adsWebView.navigationDelegate = nil
        adsWebView.stopLoading()
    }

    func resizeWithOldSuperviewSize(oldSize: NSSize) {
        var width = kAD_View_Width
        var height = kAD_View_Height
        if superview?.frame.size.width ?? 0 < width {
            let newWidth = (superview?.frame.size.width ?? 0) - 20
            height = height / width * newWidth
            width = newWidth
        }
        
        self.frame = NSRect(x: (superview?.frame.size.width ?? 0 - width) / 2.0, y: frame.origin.y, width: width, height: height)
        adsWebView.frame = bounds
    }

    func beginSheetModalForView(view: NSView, directions: KMADViewDirections, animated: Bool, completionHandler handler: ((Int) -> Void)?) {
        self.completionHandler = handler

        if adPosY < 0 {
            restoreDefaultAdPosY()
        }

        let tWidth = frame.size.width
        let tHeight = frame.size.height

        view.addSubview(self)

        if animated {
            switch directions {
            case .up:
                frame = NSRect(x: (view.frame.size.width - tWidth) / 2.0, y: view.frame.size.height, width: tWidth, height: tHeight)
                animator().frame = NSRect(x: frame.origin.x, y: view.frame.size.height - tHeight - adPosY, width: tWidth, height: tHeight)
            case .down:
                frame = NSRect(x: (view.frame.size.width - tWidth) / 2.0, y: -tHeight, width: tWidth, height: tHeight)
                animator().frame = NSRect(x: frame.origin.x, y: adPosY, width: tWidth, height: tHeight)
            default:
                frame = NSRect(x: 0, y: 0, width: tWidth, height: tHeight)
            }
        } else {
            switch directions {
            case .up:
                frame = NSRect(x: (view.frame.size.width - tWidth) / 2.0, y: view.frame.size.height - tHeight - adPosY, width: tWidth, height: tHeight)
            case .down:
                frame = NSRect(x: (view.frame.size.width - tWidth) / 2.0, y: adPosY, width: tWidth, height: tHeight)
            default:
                frame = NSRect(x: 0, y: 0, width: tWidth, height: tHeight)
            }
        }

        adsWebView.frame = bounds

        currentPage = 0
        startAdsDataRequest()

        if timer != nil {
            timer?.invalidate()
            timer = nil
        }
        var interval = 0
        if !UserDefaults.standard.bool(forKey: "kUserHaveClickRateUsKey") {
            interval = KMKdanRemoteConfig.remoteConfig().refreshAdsDate()
        } else {
            interval = KMKdanRemoteConfig.remoteConfig().refreshAdsDateEvaluateAfter()
        }
        timer = Timer.scheduledTimer(timeInterval: TimeInterval(interval), target: self, selector: #selector(adsWebView_Switch), userInfo: nil, repeats: true

)

        RunLoop.current.add(timer!, forMode: .common)
    }

    @objc func adsWebView_Switch() {
        DispatchQueue.main.async {
            if !KMKdanRemoteConfig.remoteConfig().isDisplayAds() || !KMAdsManager.defaultManager.checkTheDate() || !KMAdsManager.defaultManager.isValidLastShowAds() {
                self.removeFromSuperview()
                return
            }

            let transition = CATransition()
            transition.type = .moveIn

            let tRandomData = arc4random() % 100
            if tRandomData > 50 {
                transition.subtype = .fromBottom
            } else {
                transition.subtype = .fromTop
            }

            transition.duration = 0.6
            transition.delegate = self
            self.layer?.add(transition, forKey: "KMTransitionAnimation")

            self.currentPage += 1
            if self.currentPage >= self.adsData.count {
                self.currentPage = 0
            }

            let url = URL(string: self.adsData[self.currentPage])
            self.adsWebView.load(URLRequest(url: url!))
            KMAdsManager.defaultManager.refreshLoadingDate()
        }
    }

    @objc func buttonItemClicked_Open(_ sender: Any) {
        guard let newURL = (sender as? NSURL) else {
            return
        }

        NSWorkspace.shared.open(newURL as URL)

        adDelegate?.kmAdViewClicked(self)

        if let completionHandler = self.completionHandler {
            completionHandler(currentPage + 1)
            self.completionHandler = nil
        }
        removeFromSuperview()
    }

    @objc func buttonItemClicked_Close(_ sender: Any) {
        adDelegate?.kmAdViewClose(self)

        if let completionHandler = self.completionHandler {
            completionHandler(0)
            self.completionHandler = nil
        }
        removeFromSuperview()
    }

    func animationDidStart(_ anim: CAAnimation) {
        if timer != nil {
            timer?.invalidate()
        }

        closeButton.alphaValue = 0
    }

    func animationDidStop(_ anim: CAAnimation, finished flag: Bool) {
        if !flag {
            return
        }

        if timer != nil {
            timer?.invalidate()
        }
        var interval = 0
        if !UserDefaults.standard.bool(forKey: "kUserHaveClickRateUsKey") {
            interval = KMKdanRemoteConfig.remoteConfig().refreshAdsDate()
        } else {
            interval = KMKdanRemoteConfig.remoteConfig().refreshAdsDateEvaluateAfter()
        }
        timer = Timer.scheduledTimer(timeInterval: TimeInterval(interval), target: self, selector: #selector(adsWebView_Switch), userInfo: nil, repeats: true)

        RunLoop.current.add(timer!, forMode: .common)

        closeButton.alphaValue = 1.0

        adsWebView.frame = bounds
    }

    // MARK: - WKNavigationDelegate

    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
        if navigationAction.navigationType == .linkActivated {
            let tURL = navigationAction.request.url
            if tURL != nil {
                buttonItemClicked_Open(tURL as Any)
                decisionHandler(.cancel)
                return
            }
        }

        decisionHandler(.allow)
    }

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        webView.evaluateJavaScript("document.body.scrollHeight") { [weak self] (result, error) in
            if let height = result as? CGFloat, height > 0 {
                let newHeight = min(height, kAD_View_Height)
                self?.adsWebView.frame = NSRect(x: 0, y: 0, width: (self?.adsWebView.frame.size.width)!, height: newHeight)
                self?.frame.size.height = newHeight
                self?.closeButton.frame = NSRect(x: (self?.frame.size.width)! - 30, y: (self?.frame.size.height)! - 30, width: 30, height: 30)
            }
        }
    }

    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
        print(error)
    }

    @objc func handleUserHaveClickRateUsNotification(_ notification: Notification) {
        adsWebView_Switch()
    }
}