//
//  GiftsView.swift
//  WarplySDKFrameworkIOS
//
//  Created by Manos Chorianopoulos on 18/4/22.
//


#if canImport(SwiftUI)
import SwiftUI
import Combine
import Foundation
import UIKit


class CouponSetItemModel {
    let uuid: String?
    let admin_name: String?
    let name: String?
    let img_preview: String?
    let expiration: String?
    let description: String?
    let short_description: String?
    let discount: String?
    
    init(dictionary: [String: Any]) {
        self.uuid = dictionary["uuid"] as? String? ?? ""
        self.admin_name = dictionary["admin_name"] as? String? ?? ""
        self.name = dictionary["name"] as? String? ?? ""
        self.img_preview = dictionary["img_preview"] as? String? ?? ""
        self.description = dictionary["description"] as? String? ?? ""
        self.short_description = dictionary["short_description"] as? String? ?? ""
        self.discount = dictionary["discount"] as? String? ?? ""
        
        let expirationObject = dictionary["expiration"] as? [String: Any]? ?? ["":""]
        let expirationString = expirationObject?["value"] as? String? ?? ""
        
//      Example expirationString: Optional(2022-12-05 01:55)
        
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd hh:mm"
        if let date = dateFormatter.date(from: expirationString ?? "") {
            dateFormatter.dateFormat = "dd/MM/yyyy"
            let resultString = dateFormatter.string(from: date)
            self.expiration = resultString
        } else {
            self.expiration = ""
        }
        
        
    }
    
    var asDictionary : [String:Any] {
      let mirror = Mirror(reflecting: self)
      let dict = Dictionary(uniqueKeysWithValues: mirror.children.lazy.map({ (label:String?, value:Any) -> (String, Any)? in
        guard let label = label else { return nil }
        return (label, value)
      }).compactMap { $0 })
      return dict
    }
}

class CouponDataModel {
    var data: Array<CouponSetItemModel> = []

    init() { //initializer method
        let instanceOfMyApi = MyApi()
        let couponSets = instanceOfMyApi.getCouponSets(withActive: true, andVisible: true, andUuids: nil)
        var couponSetsArray:Array<CouponSetItemModel> = []
        
        if let myCouponsSetsDictionary = couponSets as? [String : AnyObject] {
            let couponSetsData = (myCouponsSetsDictionary["MAPP_COUPON"] as! NSArray)
            
            
            for couponset in couponSetsData {
                let tempCouponset = CouponSetItemModel(dictionary: couponset as! [String : Any])
                couponSetsArray.append(tempCouponset)
            }
            
        }
        self.data = couponSetsArray
    }

    var getData: Array<CouponSetItemModel> {
        get { // getter
            return data
        }
    }
}


class CampaignItemModel {
    let index_url: String?
    let logo_url: String?
    let offer_category: String?
    let title: String?
    let subtitle: String?
    let session_uuid: String?
    let subcategory: String?
    
    init(dictionary: [String: Any]) {
        self.index_url = dictionary["index_url"] as? String? ?? ""
        self.logo_url = dictionary["logo_url"] as? String? ?? ""
        self.offer_category = dictionary["offer_category"] as? String? ?? ""
        self.title = dictionary["title"] as? String? ?? ""
        self.subtitle = dictionary["subtitle"] as? String? ?? ""
        self.session_uuid = dictionary["session_uuid"] as? String? ?? ""
        
//        let extra_fields = dictionary["extra_fields"] as? [String: Any]? ?? ["":""]
        let extra_fields = dictionary["extra_fields"] as AnyObject
        var extra_fields_parsed:[String: Any]
        
        let json = extra_fields.data(using: String.Encoding.utf8.rawValue)
        do {
            if let jsonArray = try JSONSerialization.jsonObject(with: json!, options: .allowFragments) as? [String:AnyObject]
            {
                extra_fields_parsed = jsonArray;
                self.subcategory = extra_fields_parsed["subcategory"] as? String? ?? ""
            } else {
                self.subcategory = ""
                print("bad json")
            }
        } catch let error as NSError {
            self.subcategory = ""
            print(error)
        }
        
    }
}

class CampaignDataModel {
    var data: Array<CampaignItemModel> = []

    init() { //initializer method
        let instanceOfMyApi = MyApi()
        let products = instanceOfMyApi.getInbox() as NSMutableArray?
        
        var giftsArray:Array<CampaignItemModel> = []

        
        for gift in products ?? [] {
            let tempGift = CampaignItemModel(dictionary: gift as! [String : Any])
            giftsArray.append(tempGift)
        }
        
        self.data = giftsArray;
        
    }

    var getData: Array<CampaignItemModel> {
        get { // getter
            return data
        }
    }
}

extension String {
    func htmlToString() -> String {
        return  try! NSAttributedString(data: self.data(using: .utf8)!,
                                        options: [.documentType: NSAttributedString.DocumentType.html],
                                        documentAttributes: nil).string
    }
}

extension View {
    func cornerRadius(_ radius: CGFloat, corners: UIRectCorner) -> some View {
        clipShape( RoundedCorner(radius: radius, corners: corners) )
    }
}

struct RoundedCorner: Shape {

    var radius: CGFloat = .infinity
    var corners: UIRectCorner = .allCorners

    func path(in rect: CGRect) -> Path {
        let path = UIBezierPath(roundedRect: rect, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
        return Path(path.cgPath)
    }
}

class UrlImageModel: ObservableObject {
    @Published var image: UIImage?
    var urlString: String?
    var imageCache = ImageCache.getImageCache()
    
    
    func loadImage() {
        if loadImageFromCache() {
            print("Cache hit")
            return
        }
        
        print("Cache miss, loading from url")
        loadImageFromUrl()
    }
    
    func loadImageFromCache() -> Bool {
        guard let urlString = urlString else {
            return false
        }
        
        guard let cacheImage = imageCache.get(forKey: urlString) else {
            return false
        }
        
        image = cacheImage
        return true
    }
    
    func loadImageFromUrl() {
        guard let urlString = urlString else {
            return
        }
        
        let url = URL(string: urlString)!
        let task = URLSession.shared.dataTask(with: url, completionHandler: getImageFromResponse(data:response:error:))
        task.resume()
    }
    
    func getImageFromResponse(data: Data?, response: URLResponse?, error: Error?) {
        guard error == nil else {
            print("Error: \(error!)")
            return
        }
        guard let data = data else {
            print("No data found")
            return
        }
        
        DispatchQueue.main.async {
            guard let loadedImage = UIImage(data: data) else {
                return
            }
            
            self.imageCache.set(forKey: self.urlString!, image: loadedImage)
            self.image = loadedImage
        }
    }

    init(urlString:String) {
        self.urlString = urlString
        loadImage()
    }
}

class ImageCache {
    var cache = NSCache<NSString, UIImage>()
    
    func get(forKey: String) -> UIImage? {
        return cache.object(forKey: NSString(string: forKey))
    }
    
    func set(forKey: String, image: UIImage) {
        cache.setObject(image, forKey: NSString(string: forKey))
    }
}

extension ImageCache {
    private static var imageCache = ImageCache()
    static func getImageCache() -> ImageCache {
        return imageCache
    }
}


extension GiftsView {
    struct headerView: View {
        var goBack: () -> ()
        
        var uiscreen = UIScreen.main.bounds
        
        var body: some View {
            HStack(alignment: .center) {
                Button {
                    // Button Action
                    print("Back Button tapped!")
                    goBack()
                } label: {
                    Image("ic_back", bundle: Bundle(for: MyEmptyClass.self))
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(width: self.uiscreen.height * 0.025, height: self.uiscreen.height * 0.02)
                }
               
                Text("Gifts for You")
                    .fontWeight(.medium)
                    .font(.system(size: 16))
                    .foregroundColor(Color(red: 0.20784313725490197, green: 0.3176470588235294, blue: 0.40784313725490196))
                    .multilineTextAlignment(.center)
                    .frame(maxWidth: .infinity)
                    .padding(.horizontal)
                
                Button {
                    // Button Action
                    print("Location tapped!")
                } label: {
                    Image("location_icon", bundle: Bundle(for: MyEmptyClass.self))
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(width: self.uiscreen.height * 0.04, height: self.uiscreen.height * 0.04)
                }
               
            }
            .frame(maxWidth: .infinity)
            .padding(.horizontal)
            .padding(.vertical, 10)
        }
    }
    
    struct searchView: View {
        @State var searchText: String = ""
        
        var uiscreen = UIScreen.main.bounds
        
        var body: some View {
            HStack(alignment: .center) {
                HStack(alignment: .center) {
                    Image("search_icon", bundle: Bundle(for: MyEmptyClass.self))
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(width: self.uiscreen.height * 0.025, height: self.uiscreen.height * 0.025)
                        .padding([.top, .leading, .bottom], 10)
                    TextField("Βρες το gift που σε ενδιαφέρει", text: $searchText)
                        .frame(maxWidth: .infinity)
                        .padding(.all, 10)
                        .foregroundColor(Color(red: 0.48627450980392156, green: 0.48627450980392156, blue: 0.48627450980392156))
                        .font(.system(size: 16, weight: .regular, design: .default))
                }
                .overlay(
                    RoundedRectangle(cornerRadius: 9)
                        .stroke(Color(red: 0.8235294117647058, green: 0.8235294117647058, blue: 0.8235294117647058), lineWidth: 1)
                )
                
                Button {
                    // Button Action
                    print("Filters tapped!")
                } label: {
                    Image("filters_btn", bundle: Bundle(for: MyEmptyClass.self))
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(width: self.uiscreen.height * 0.06, height: self.uiscreen.height * 0.04)
                        .padding(.leading, 5)
                }
            }
            .frame(maxWidth: .infinity)
            .padding(.horizontal, 20)
            .padding(.vertical, 5)
        }
    }
    
    struct ImageView: View {
        @ObservedObject var imageLoader:UrlImageModel
        @State var width:CGFloat
        @State var isFill:Bool
        
        var uiscreen = UIScreen.main.bounds

        init(withURL url:String , width:CGFloat, isFill:Bool) {
            imageLoader = UrlImageModel(urlString:url)
            self.width = width
            self.isFill = isFill
        }

        var body: some View {
            
            Image(uiImage: imageLoader.image ?? UIImage())
                .resizable()
                .aspectRatio(contentMode: isFill ? .fill : .fit)
                .frame(width: self.width)
                .frame(maxHeight: .infinity)
        }
    }
    
    
    struct giftItemView: View {
        var item: CampaignItemModel
        var isFirst: Bool
        var isLast: Bool
        var parentView: UIView
        
        var uiscreen = UIScreen.main.bounds
        
        var body: some View {
            Button {
                // GiftItem Action
                let instanceOfMyApi = MyApi()
                let campaignViewController = instanceOfMyApi.openCampaign(parentView, campaign: item.index_url)!
                campaignViewController.view.tag = 6
//                addChild(couponsViewController)
                campaignViewController.view.frame = parentView.frame
                parentView.addSubview(campaignViewController.view)
                campaignViewController.didMove(toParent: UIHostingController(rootView: self))
            } label: {
                HStack(alignment: .center) {
                    
                    ImageView(withURL: item.logo_url ?? "", width: self.uiscreen.width * 0.5, isFill: true)
                    
                    Text(item.title ?? "")
                        .fontWeight(.regular)
                        .font(.system(size: 16))
                        .foregroundColor(Color(red: 0.22745098039215686, green: 0.3215686274509804, blue: 0.4))
                        .multilineTextAlignment(.center)
                        .frame(maxWidth: .infinity, maxHeight: .infinity)
                        .padding(.all, 10)
                        .background(Color.white)
                }
            }
            .frame(width: self.uiscreen.width * 0.9, height: self.uiscreen.height * 0.16)
            .background(Color.white)
            .cornerRadius(5)
            .shadow(color: Color(red: 0, green: 0, blue: 0, opacity: 0.16), radius: 30, x: 0, y: 3)
            .padding(.leading, isFirst ? 18 : 0)
            .padding(.trailing, isLast ? 18 : 0)
        }
    }
    
    struct giftsContainer: View {
        @State var gifts:Array<CampaignItemModel> = []
        @State var title:String = ""
        @State var parentView:UIView
        
        var uiscreen = UIScreen.main.bounds
        
        var body: some View {
            VStack(alignment: .leading) {
                
                 Text(title)
                     .fontWeight(.bold)
                     .font(.system(size: 17))
                     .foregroundColor(Color.white)
                     .multilineTextAlignment(.leading)
                     .padding(.horizontal)
                     .padding(.top, self.uiscreen.height * 0.05)
                     .padding(.bottom, self.uiscreen.height * 0.015)
                
                ScrollView(.horizontal, showsIndicators: false) {
                    HStack(alignment: .center) {
                        ForEach(Array(gifts.enumerated()), id: \.offset) { index, item in
                            
                            giftItemView(item: item, isFirst: index == 0, isLast: index == (gifts.count-1), parentView: parentView)
                        }
                        
                    }
                    .frame(maxWidth: .infinity)
                }
                .frame(maxWidth: .infinity)
                
            }
            .frame(maxWidth: .infinity)
        }
    }
    
    struct couponsContainer: View {
        @State var coupons:Array<CouponSetItemModel> = []
        @State var title:String = ""
        @State var parentView:UIView
        
        var uiscreen = UIScreen.main.bounds
        
        var body: some View {
            VStack(alignment: .leading) {
                
                 Text(title)
                     .fontWeight(.bold)
                     .font(.system(size: 17))
                     .foregroundColor(Color.white)
                     .multilineTextAlignment(.leading)
                     .padding(.horizontal)
                     .padding(.top, self.uiscreen.height * 0.05)
                     .padding(.bottom, self.uiscreen.height * 0.015)
                
                ScrollView(.horizontal, showsIndicators: false) {
                    HStack(alignment: .center) {
                        ForEach(Array(coupons.enumerated()), id: \.offset) { index, item in
                            
                            couponItemView(item: item, isFirst: index == 0, isLast: index == (coupons.count-1), parentView: parentView)
                        }
                        
                    }
                    .frame(maxWidth: .infinity)
                }
                .frame(maxWidth: .infinity)
                
            }
            .frame(maxWidth: .infinity)
            .padding(.bottom, self.uiscreen.height * 0.1)
        }
    }
    
    struct couponItemView: View {
        var item: CouponSetItemModel
        var isFirst: Bool
        var isLast: Bool
        var parentView: UIView
        
        var uiscreen = UIScreen.main.bounds
        
        var body: some View {
            Button {
                // GiftItem Action
                let tempItem = item.asDictionary
                let instanceOfMyApi = MyApi()
                let couponViewController = instanceOfMyApi.openCoupon(parentView, coupon: tempItem)!
                couponViewController.view.tag = 2
//                addChild(couponsViewController)
                couponViewController.view.frame = parentView.frame
                parentView.addSubview(couponViewController.view)
                couponViewController.didMove(toParent: UIHostingController(rootView: self))
            } label: {
                    
                    HStack(alignment: .center) {
                        
                        ImageView(withURL: item.img_preview ?? "", width: self.uiscreen.width * 0.15, isFill: false)
                        
                        VLine()
                            .stroke(style: StrokeStyle(lineWidth: 1, dash: [5]))
                            .foregroundColor(Color(red: 0.4392156862745098, green: 0.4392156862745098, blue: 0.4392156862745098))
                            .frame(width: 1)
                            .padding(.leading, 10)
                        
                        VStack(alignment: .leading) {
                            Text(item.name ?? "")
                                .fontWeight(.medium)
                                .font(.system(size: 16))
                                .foregroundColor(Color(red: 0.22745098039215686, green: 0.3215686274509804, blue: 0.4))
                                .multilineTextAlignment(.leading)
                                .lineLimit(1)
//                                .frame(maxWidth: .infinity)
                            
                            HStack(alignment: .center) {
                                Text((item.discount ?? "")+"€")
                                    .fontWeight(.bold)
                                    .font(.system(size: 25))
                                    .foregroundColor(Color(red: 0.22745098039215686, green: 0.3215686274509804, blue: 0.4))
                                    .multilineTextAlignment(.leading)
                                    .lineLimit(1)
//                                    .frame(width: self.uiscreen.width * 0.3)
//                                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                                
                                    Text(item.short_description ?? "")
                                    .fontWeight(.medium)
                                        .font(.system(size: 11))
                                        .foregroundColor(Color(red: 0.3803921568627451, green: 0.44313725490196076, blue: 0.5058823529411764))
                                        .multilineTextAlignment(.leading)
                                        .lineLimit(3)
//                                        .frame(maxWidth: .infinity)
//                                        .padding(.leading, 10)
                            }
//                            .padding(.vertical, 5)
                            .frame(maxHeight: .infinity)
                            
                            Text("Ισχύει έως "+(item.expiration ?? ""))
                            .fontWeight(.medium)
                                .font(.system(size: 11))
                                .foregroundColor(Color(red: 0.3803921568627451, green: 0.44313725490196076, blue: 0.5058823529411764))
                                .multilineTextAlignment(.leading)
//                                .frame(maxWidth: .infinity)
//                                    .frame(maxWidth: .infinity, maxHeight: .infinity)
//                                    .padding(.all, 10)
                        }
                        .padding(.all, 10)
//                        .frame(maxWidth: .infinity, maxHeight: .infinity)
                        
                        Spacer()
                        
                    }
                    .padding(.leading, 28)
                    .padding(.trailing)
            }
            .frame(width: self.uiscreen.width * 0.9, height: self.uiscreen.height * 0.14)
            .cornerRadius(5)
            .shadow(color: Color(red: 0, green: 0, blue: 0, opacity: 0.16), radius: 30, x: 0, y: 3)
            .padding(.leading, isFirst ? 18 : 0)
            .padding(.trailing, isLast ? 18 : 0)
            .background(
                Image("coupon_bg", bundle: Bundle(for: MyEmptyClass.self))
                    .resizable(resizingMode: .stretch)
                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                    .padding(.leading, isFirst ? 18 : 0)
                    .padding(.trailing, isLast ? 18 : 0)
            )
        }
    }
    
    struct VLine: Shape {
        func path(in rect: CGRect) -> Path {
            Path { path in
                path.move(to: CGPoint(x: rect.midX, y: rect.minY))
                path.addLine(to: CGPoint(x: rect.midX, y: rect.maxY))
            }
        }
    }
    
}

@available(iOS 13.0.0, *)
struct GiftsView: View {
    var parentView: UIView
    
    var coupons:Array<CouponSetItemModel> = CouponDataModel().getData
    var campains:Array<CampaignItemModel> = CampaignDataModel().getData.filter { $0.offer_category == "gifts_for_you" }
    
    var uiscreen = UIScreen.main.bounds
    
    func goBack(){
        for subview in parentView.subviews {
            if(subview.tag == 5) {
                subview.removeFromSuperview()
            }
        }
    }
    
    var body: some View {
        VStack {
            headerView(goBack: goBack)
            searchView()
            
            ScrollView(showsIndicators: false) {
               VStack {
                   if (campains.filter { $0.subcategory == "gifts" }.count) > 0 {
                       giftsContainer(gifts: campains.filter { $0.subcategory == "gifts" }, title: "ΔΩΡΑ", parentView: parentView)
                   }
                   
                   
                   if (campains.filter { $0.subcategory == "rewards" }.count) > 0 {
                       giftsContainer(gifts: campains.filter { $0.subcategory == "rewards"}, title: "ΕΠΙΒΡΑΒΕΥΣΕΙΣ", parentView: parentView )
                   }
                   
                   if (coupons.count) > 0 {
                       couponsContainer(coupons: coupons, title: "ΚΟΥΠΟΝΙΑ", parentView: parentView )
                   }
                   
                }
                .frame(width:self.uiscreen.width)
            }
            .background(
                LinearGradient(gradient: Gradient(colors: [Color(red: 0.06, green: 0.67, blue: 0.84), Color(red: 0.47, green: 0.75, blue: 0.43)]), startPoint: .top, endPoint: .bottom)
            )
            .cornerRadius(30, corners: [.topLeft])
            .frame(width:self.uiscreen.width)
            .frame(maxHeight: .infinity)
        }
        .edgesIgnoringSafeArea([.bottom])
        .frame(width:self.uiscreen.width)
        .frame(maxHeight: .infinity)
    }
}
#endif

//@available(iOS 13.0.0, *)
//struct GiftsView_Previews: PreviewProvider {
//    static var previews: some View {
//
//        GiftsView()
//
//    }
//}