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!
    var clickButton: NSButton!
    private var currentPage: Int = 0
    private var completionHandler: ((Int) -> Void)?

    var adsImageView: NSImageView!
    var adsInfo: KMAdsInfo!

    var adPosY: CGFloat = 30.0

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

        adsImageView = NSImageView.init(frame: self.bounds)
        adsImageView.autoresizingMask = [.width, .height]
        adsImageView.imageScaling = .scaleAxesIndependently
        addSubview(adsImageView)

        adPosY = 30.0
        
        clickButton = NSButton.init(frame: self.bounds)
        clickButton.isHidden = false
        clickButton.autoresizingMask = [.width, .height]
        clickButton.isBordered = false
        clickButton.title = ""
        clickButton.target = self
        clickButton.action = #selector(buttonItemClicked(_:))
        addSubview(clickButton)
        
        closeButton = NSButton.init(frame: NSRect(x: frameRect.size.width - 30, y: frameRect.size.height - 30, width: 30, height: 30))
        closeButton.isHidden = false
        closeButton.imagePosition = .imageOnly
        closeButton.imageScaling = .scaleProportionallyUpOrDown
        closeButton.autoresizingMask = [.maxXMargin, .minYMargin]
        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(recommondInfoUpdateNoti), name: NSNotification.Name("KMRecommondInfoUpdateNoti"), object: nil)
        
    }

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

    deinit {
        adDelegate = nil
         
        completionHandler = nil
        NotificationCenter.default.removeObserver(self)
    }

    func restoreDefaultAdPosY() {
        adPosY = 30.0
    }

    func reloadData() {
        DispatchQueue.main.async {
            self.adsImageView.image = self.adsInfo.adsImage
        }
    }

    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)

    }

    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)
            }
        }

        adsImageView.frame = bounds
        closeButton.frame = NSRect(x: self.bounds.size.width - 30, y: self.bounds.size.height - 30, width: 30, height: 30)

        currentPage = 0
    }
    
    @objc func recommondInfoUpdateNoti() {
        DispatchQueue.main.async {
           
            self.reloadData()
        }
    }

    //MARK: - Action
    @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)
        }
        removeFromSuperview()
    }
    
    @objc func buttonItemClicked(_ sender: Any) {
        
        guard let string = self.adsInfo?.adsURLLink else {
            return
        }
        
        let newURL = NSURL(string: string)

        NSWorkspace.shared.open(newURL! as URL)

        if let completionHandler = self.completionHandler {
            completionHandler(currentPage + 1)
        }
        
        adDelegate?.kmAdViewClicked(self)
        
    }
    
    @objc func buttonItemClicked_Close(_ sender: Any) {
        adDelegate?.kmAdViewClose(self)

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

    //MARK: - CAAnimation
    func animationDidStart(_ anim: CAAnimation) {

    }

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

        closeButton.alphaValue = 1.0

        adsImageView.frame = bounds
    }

    // MARK: - WKNavigationDelegate
 
    @objc func handleUserHaveClickRateUsNotification(_ notification: Notification) {
        
    }
}