// GuruMaxMRecAd.swift
// Implementation for MAX MREC ads
// Corresponds to GuruMaxMRecAd.kt in Android implementation

import Foundation
import UIKit
import AppLovinSDK

public class GuruMaxMRecAd: GuruMRecAd, MAAdViewAdDelegate, MAAdRevenueDelegate {
    
    private let viewController: UIViewController
    private let adConfig: AdConfig
    private var mrecAd: MAAdView?
    private var contentView: UIView?
    private var currentUid2Token: String = ""
    private var horizontalOffset: CGFloat = 0.0
    private var verticalOffset: CGFloat = 0.0
    private var orientation: ScreenOrientation = .portrait
    
    private var contentId: Int {
        return self.adConfig.engineId
    }
    
    public init(viewController: UIViewController, adConfig: AdConfig) {
        self.viewController = viewController
        self.adConfig = adConfig
        super.init(engineId: adConfig.engineId, adUnitId: adConfig.adUnitId, adPlatform: AdPlatform.max)
    }
    
    public override func logDebug(_ message: String) {
        Logger.d(tag: "MaxMRecAd[\(adConfig.adUnitId)]", message: message)
    }
    
    public override func logInfo(_ message: String) {
        Logger.i(tag: "MaxMRecAd[\(adConfig.adUnitId)]", message: message)
    }
    
    public override func logWarn(_ message: String) {
        Logger.w(tag: "MaxMRecAd[\(adConfig.adUnitId)]", message: message)
    }
    
    public override func load() -> Bool {
        mrecAd = MAAdView(adUnitIdentifier: adConfig.adUnitId, adFormat: MAAdFormat.mrec)
        
        guard let mrecAd = mrecAd else { return false }
        
        mrecAd.delegate = self
        mrecAd.revenueDelegate = self
        mrecAd.setExtraParameterForKey("allow_pause_auto_refresh_immediately", value: "true")
        
        if let uid2Token = AdsHelper.getUid2Token() {
            mrecAd.setExtraParameterForKey("uid2_token", value: uid2Token)
            currentUid2Token = uid2Token
        }
        
        mrecAd.stopAutoRefresh()
        
        if let amazonSlotId = adConfig.adAmazonSlotId, !amazonSlotId.isEmpty {
            // In a real implementation, you would load Amazon ads here
            logDebug("Would load Amazon MREC ad with slot ID: \(amazonSlotId)")
            
            // Simulate direct load for now
            mrecAd.loadAd()
        } else {
            mrecAd.loadAd()
        }
        
        return true
    }
    
    public override func show(request: MRecShowRequest? = nil) -> Bool {
        let placement = request?.placement
        let newHorizontalOffset = request?.horizontalOffset
        let newVerticalOffset = request?.verticalOffset
        
        var shouldReattach = false
        
        // Check if position or offset has changed
        if let offset = newVerticalOffset, offset != Float(verticalOffset) {
            verticalOffset = CGFloat(offset)
            shouldReattach = true
        }
        
        if let offset = newHorizontalOffset, offset != Float(horizontalOffset) {
            horizontalOffset = CGFloat(offset)
            shouldReattach = true
        }
        
        // If we already have a view and parameters changed, remove it
        if let contentView = contentView, shouldReattach {
            logInfo("Parameters changed! Re-attaching view!")
            contentView.removeFromSuperview()
            self.contentView = nil
        }
        
        // Create new content view if needed
        if contentView == nil {
            let container = UIView()
            container.tag = contentId
            
            viewController.view.addSubview(container)
            container.translatesAutoresizingMaskIntoConstraints = false
            NSLayoutConstraint.activate([
                container.leadingAnchor.constraint(equalTo: viewController.view.leadingAnchor),
                container.trailingAnchor.constraint(equalTo: viewController.view.trailingAnchor),
                container.topAnchor.constraint(equalTo: viewController.view.topAnchor),
                container.bottomAnchor.constraint(equalTo: viewController.view.bottomAnchor)
            ])
            
            contentView = container
            
            guard let mrecAd = mrecAd else { return false }
            
            // Standard MREC size is 300x250
            let mrecWidth: CGFloat = 300
            let mrecHeight: CGFloat = 250
            
            mrecAd.translatesAutoresizingMaskIntoConstraints = false
            container.addSubview(mrecAd)
            
            NSLayoutConstraint.activate([
                mrecAd.leadingAnchor.constraint(equalTo: container.leadingAnchor, constant: horizontalOffset),
                mrecAd.topAnchor.constraint(equalTo: container.topAnchor, constant: verticalOffset),
                mrecAd.widthAnchor.constraint(equalToConstant: mrecWidth),
                mrecAd.heightAnchor.constraint(equalToConstant: mrecHeight)
            ])
            
            mrecAd.isHidden = false
            mrecAd.startAutoRefresh()
        } else {
            mrecAd?.startAutoRefresh()
            mrecAd?.isHidden = false
        }
        
        // Update UID2 token if needed
        if let uid2Token = AdsHelper.getUid2Token(), !uid2Token.isEmpty, uid2Token != currentUid2Token {
            mrecAd?.setExtraParameterForKey("uid2_token", value: uid2Token)
            currentUid2Token = uid2Token
            logInfo("MRec refresh uid2_token \(currentUid2Token)")
        }
        
        return true
    }
    
    public override func hide() -> Bool {
        guard let _ = viewController.view.viewWithTag(contentId) else {
            return true
        }
        
        if let mrecAd = mrecAd, !mrecAd.isHidden {
            mrecAd.setExtraParameterForKey("allow_pause_auto_refresh_immediately", value: "true")
            mrecAd.stopAutoRefresh()
            mrecAd.isHidden = true
        }
        
        return true
    }
    
    override public func destroy() -> Bool{
        mrecAd?.delegate = nil
        mrecAd?.revenueDelegate = nil
        mrecAd?.removeFromSuperview()
        mrecAd = nil
        
        contentView?.removeFromSuperview()
        contentView = nil
        return true
    }
    
    override public func updateOrientation(orientation: ScreenOrientation) -> Bool {
        if let _ = viewController.view.viewWithTag(contentId), self.orientation != orientation {
            let isVisible = !(mrecAd?.isHidden ?? true)
            
            mrecAd?.setExtraParameterForKey("allow_pause_auto_refresh_immediately", value: "true")
            mrecAd?.stopAutoRefresh()
            mrecAd?.isHidden = true
            
            contentView?.removeFromSuperview()
            contentView = nil
            
            if isVisible {
                return show()
            }
        }
        
        self.orientation = orientation
        return true
    }
    
    // MARK: - MAAdViewAdDelegate methods
    
    public func didLoad(_ ad: MAAd) {
        listener?.onAdLoaded(ad: MaxFusionAd(engineId: engineId, adType: AdType.MRec, ad: ad))
    }
    
    public func didFailToLoadAd(forAdUnitIdentifier adUnitIdentifier: String, withError error: MAError) {
        let loadFailedInfo = LoadFailedInfo(
            engineId: engineId,
            adPlatform: AdPlatform.max,
            adType: AdType.MRec,
            adUnitId: adUnitIdentifier,
            error: MaxFusionError(error)
        )
        listener?.onAdLoadFailed(loadFailedInfo: loadFailedInfo)
    }
    
    public func didDisplay(_ ad: MAAd) {
        listener?.onAdDisplayed(ad: MaxFusionAd(engineId: engineId, adType: AdType.MRec, ad: ad))
    }
    
    public func didHide(_ ad: MAAd) {
        listener?.onAdHidden(ad: MaxFusionAd(engineId: engineId, adType: AdType.MRec, ad: ad))
    }
    
    public func didClick(_ ad: MAAd) {
        listener?.onAdClicked(ad: MaxFusionAd(engineId: engineId, adType: AdType.MRec, ad: ad))
    }
    
    public func didFail(toDisplay ad: MAAd, withError error: MAError) {
        listener?.onAdDisplayFailed(
            ad: MaxFusionAd(engineId: engineId, adType: AdType.MRec, ad: ad),
            error: MaxFusionError(error)
        )
    }
    
    public func didExpand(_ ad: MAAd) {
        // In a real implementation, you would call adBannerExpanded
    }
    
    public func didCollapse(_ ad: MAAd) {
        // In a real implementation, you would call adBannerCollapsed
    }
    
    // MARK: - MAAdRevenueDelegate methods
    
    public func didPayRevenue(for ad: MAAd) {
        listener?.onAdRevenuePaid(ad: MaxFusionAd(engineId: engineId, adType: AdType.MRec, ad: ad))
    }
}