//
//  GuruBannerCoordinator.swift
//  Pods
//
//  Created by 250102 on 2025/5/9.
//

protocol GuruBannerView {
    
    func view() -> UIView
    func setPlacementName(placement: String)
    func onShow();
    func onHide();
}

class GuruBannerCoordinator<T: GuruBannerView> {
    
    private let viewController: UIViewController
    public private(set) var bannerAd: T
    private var bannerPosition: BannerPosition { return lastShowRequest?.position ?? BannerPosition.bottom }
    private var bannerOffset: CGFloat { return CGFloat(lastShowRequest?.offset ?? 0.0) }
    private var lastShowRequest: BannerShowRequest? = nil

    public private(set) var orientation: ScreenOrientation = .portrait
        
    public init(viewController: UIViewController, bannerAd: T, contentId: Int) {
        self.viewController = viewController
        self.bannerAd = bannerAd
    }
    
    public func logInfo(_ message: String) {
        Logger.i(tag: "GuruBannerCoordinator", message: "\(message)")
    }
    public func logWarn(_ message: String) {
        Logger.w(tag: "GuruBannerCoordinator", message: "\(message)")
    }
    
    public func show(_ request: BannerShowRequest? = nil) -> Bool {
        var shouldReattach = false
        
        // Check if position or offset has changed
        if let newOffset = request?.offset, newOffset != Float(bannerOffset) {
            shouldReattach = true
        }
        
        if let newPosition = request?.position, newPosition != bannerPosition {
            shouldReattach = true
        }
        
        lastShowRequest = request
        
        guard let container = viewController.viewIfLoaded else {
            logWarn("viewController.view is nil, returns false")
            return false
        }
        let bannerAdView = bannerAd.view()
        
        var attached = container.subviews.contains(bannerAdView)
        
        // If we already have a view and parameters changed, remove it
        if shouldReattach || !attached {
            logInfo("Parameters changed! Re-attaching view!")
            if(attached) {
                bannerAdView.removeFromSuperview()
            }
            let isTablet = UIDevice.current.userInterfaceIdiom == .pad
            let bannerHeight: CGFloat = isTablet ? 90 : 50
            let screenWidth = min(viewController.view.bounds.width, viewController.view.bounds.height)
            
            container.addSubview(bannerAdView)
            bannerAdView.translatesAutoresizingMaskIntoConstraints = false
            
            
            logInfo("BannerAd show!!! bannerSize: \(screenWidth)x\(bannerHeight)")
                        
            if let placement = lastShowRequest?.placement {
                bannerAd.setPlacementName(placement: placement)
            }
            // Configure banner position and rotation
            var transform = CGAffineTransform.identity
            switch bannerPosition {
            case .start:
                transform = CGAffineTransform(rotationAngle: .pi / 2)
                NSLayoutConstraint.activate([
                    bannerAdView.leadingAnchor.constraint(equalTo: container.safeAreaLayoutGuide.leadingAnchor, constant: bannerOffset),
                    bannerAdView.centerYAnchor.constraint(equalTo: container.centerYAnchor),
                    bannerAdView.widthAnchor.constraint(equalToConstant: screenWidth),
                    bannerAdView.heightAnchor.constraint(equalToConstant: bannerHeight)
                ])
                
            case .end:
                transform = CGAffineTransform(rotationAngle: -(.pi / 2))
                NSLayoutConstraint.activate([
                    bannerAdView.trailingAnchor.constraint(equalTo: container.safeAreaLayoutGuide.trailingAnchor, constant: -bannerOffset),
                    bannerAdView.centerYAnchor.constraint(equalTo: container.centerYAnchor),
                    
                    bannerAdView.widthAnchor.constraint(equalToConstant: screenWidth),
                    bannerAdView.heightAnchor.constraint(equalToConstant: bannerHeight)
                ])
                
            case .top:
                transform = CGAffineTransform(rotationAngle: 0)
                
                NSLayoutConstraint.activate([
                    bannerAdView.centerXAnchor.constraint(equalTo: container.centerXAnchor),
                    bannerAdView.topAnchor.constraint(equalTo: container.safeAreaLayoutGuide.topAnchor, constant: bannerOffset),
                    
                    bannerAdView.heightAnchor.constraint(equalToConstant: bannerHeight),
                    bannerAdView.widthAnchor.constraint(equalToConstant: screenWidth),
                ])
                
            default:
                transform = CGAffineTransform(rotationAngle: 0)
                NSLayoutConstraint.activate([
                    bannerAdView.centerXAnchor.constraint(equalTo: container.centerXAnchor),
                    bannerAdView.bottomAnchor.constraint(equalTo: container.safeAreaLayoutGuide.bottomAnchor, constant: -bannerOffset),
                    
                    bannerAdView.heightAnchor.constraint(equalToConstant: bannerHeight),
                    bannerAdView.widthAnchor.constraint(equalToConstant: screenWidth)
                ])
            }
            
            bannerAdView.transform = transform
            bannerAdView.isHidden = false
            bannerAd.onShow()
        } else {
            bannerAd.view().isHidden = false
            bannerAd.onShow()
        }
        
        if let placement = request?.placement {
            bannerAd.setPlacementName(placement: placement)
        }
        
        return true
    }
    
    public func hide() -> Bool {
        guard let _ = viewController.view.superview?.contains(bannerAd.view()) else {
            return true
        }

        bannerAd.view().isHidden = true
        bannerAd.onHide()
        
        return true
    }
    
    public func destroy() -> Bool {
        bannerAd.view().removeFromSuperview()

        return true
    }
    
    public func updateOrientation(orientation: ScreenOrientation) -> Bool {
        if let _ = viewController.view.superview?.contains(bannerAd.view()), self.orientation != orientation {
            let isVisible = !bannerAd.view().isHidden
            
            bannerAd.onHide()
            bannerAd.view().isHidden = true
            if isVisible {
                return show()
            }
        }
        
        self.orientation = orientation
        return true
    }
}