//
//  OneTimePaywallView.swift
//  Lockdown
//
//  Created by Radu Lazar on 05.08.2024.
//  Copyright © 2024 Confirmed Inc. All rights reserved.
//

import SwiftUI

struct OneTimePaywallView: View {
    @StateObject var model: OneTimePaywallModel
    @State private var arrowOffset: CGFloat = -3.125
    
    @State private var screenSize = UIScreen.main.bounds.size
    
    private var isRunningOnIpad: Bool {
            return UIDevice.current.userInterfaceIdiom == .pad
        }
    
    var body: some View {
        GeometryReader { geometry in
            ZStack(alignment: .bottom) {
                Image(isRunningOnIpad ? "bg_paywall_onetime_ss" : "bg_paywall_onetime")
                    .resizable()
                    .scaledToFill()
                    .frame(width: screenSize.width, height: screenSize.height)
                
                LinearGradient(stops:
                                [Gradient.Stop(color: Color.black.opacity(0.0), location: 0.0),
                                 Gradient.Stop(color: Color.black.opacity(0.0), location: 0.2),
                                 Gradient.Stop(color: Color.black.opacity(0.6), location: 0.5),
                                 Gradient.Stop(color: Color.black.opacity(0.6), location: 1.0),
                                ], startPoint: .top, endPoint: .bottom)
                
                VStack(alignment: .leading, spacing: 8) {
                    title
                    subtitle
                    detailItems
                    
                    trialToggle
                    
                    yearlyProduct
                    weeklyProduct
                    
                    purchaseButton
                    
                    noPaymentFooter
                        .opacity(model.trialEnabled ? 1 : 0)
                    
                    footerLinks
                }
                .padding(40)
                
                VStack(alignment: .leading) {
                    closeButton
                        .padding(.top, geometry.safeAreaInsets.top + (isRunningOnIpad ? 30 : 0))
                    Spacer()
                }
                .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .leading)
                .allowsHitTesting(model.showProgress ? false : true)
                
                ProgressView()
                    .offset(y: -70)
                    .scaleEffect(3)
                    .progressViewStyle(CircularProgressViewStyle(tint: .white))
                    .opacity(model.showProgress ? 1 : 0)
            }
            .allowsHitTesting(model.showProgress ? false : true)
            
            .frame(width: screenSize.width, height: screenSize.height)
            .ignoresSafeArea()
            .onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in
                screenSize = UIScreen.main.bounds.size
            }
        }
    }
    
    private var purchaseButton: some View {
        Button(action: {
            model.purchase()
        }, label: {
            ZStack(alignment: .trailing) {
                Text("Paywall.Onetime.Continue")
                    .font(.custom("Montserrat-SemiBold", size: 20))
                    .foregroundColor(.white)
                    .padding()
                    .padding(.vertical, 2)
                    .frame(maxWidth: .infinity)
                    .background(
                        RoundedRectangle(cornerRadius: 50)
                            .fill(Color("Confirmed Blue"))
                    )
                Image(systemName: "arrow.right")
                    .foregroundColor(.white)
                    .padding(20)
                    .offset(x: arrowOffset)
                    .animation(Animation.easeInOut(duration: 0.39).repeatForever(autoreverses: true), value: arrowOffset)
                    .onAppear {
                        arrowOffset = 3.125
                    }
            }
        })
    }
    
    private var title: some View {
        Group {
            Text("Tap")
                .foregroundColor(.white)
            + Text("Paywall.Onetime.Continue")
                .foregroundColor(Color("Confirmed Blue"))
            + Text("Paywall.Onetime.ToActivate")
                .foregroundColor(.white)
        }
        .font(.system(size: 28, weight: .semibold))
        .frame(maxWidth: .infinity)
        .minimumScaleFactor(0.75)
    }
    
    private var subtitle: some View {
        Text("Paywall.Onetime.PrivateBrowse")
            .foregroundColor(.white)
            .font(.custom("Montserrat-Regular", size: 14))
    }
    
    private var detailItems: some View {
        VStack(alignment: .leading, spacing: 2) {
            HStack {
                Image(systemName: "checkmark")
                    .foregroundColor(Color("Confirmed Blue"))
                Text("Paywall.Onetime.List1")
                    .foregroundColor(.white)
            }
            HStack {
                Image(systemName: "checkmark")
                    .foregroundColor(Color("Confirmed Blue"))
                Text("Paywall.Onetime.List2")
                    .foregroundColor(.white)
            }
            HStack {
                Image(systemName: "checkmark")
                    .foregroundColor(Color("Confirmed Blue"))
                Text("Paywall.Onetime.List3")
                    .foregroundColor(.white)
            }
        }
        .font(.custom("Montserrat-Semibold", size: 12))
        .padding(.vertical, 5)
        .minimumScaleFactor(0.75)
    }
    
    private var trialToggle: some View {
        HStack {
            Text("Paywall.Onetime.FreeTrialE")
                .lineLimit(1)
                .font(.custom("Montserrat-SemiBold", size: 16))
                .foregroundColor(.white)
            Spacer()
            Toggle(isOn: $model.trialEnabled, label: {})
                .toggleStyle(SwitchToggleStyle(tint: Color("Confirmed Blue")))
                .frame(maxWidth: 60)
        }
        .modifier(BubbleBg())
    }
    
    private var yearlyProduct: some View {
        ZStack {
            HStack {
                VStack(alignment: .leading) {
                    Text("Paywall.Onetime.YearlyPlan")
                        .font(.custom("Montserrat-Medium", size: 12))
                    Text("Paywall.Onetime.Just \(model.yearlyPrice)")
                        .font(.custom("Montserrat-SemiBold", size: 12))
                }
                .font(.custom("Montserrat-SemiBold", size: 16))
                .foregroundColor(.white)
                
                Spacer()
                
                VStack(alignment: .trailing) {
                    Text("\(model.weeklyPrice)")
                        .font(.custom("Montserrat-SemiBold", size: 14))
                    Text("Paywall.Onetime.PerWeek")
                        .font(.custom("Montserrat-Medium", size: 14))
                }
                .foregroundColor(.white)
            }
            .modifier(BubbleBg(lineColor: model.activePlan == .yearly ? Color("Confirmed Blue") : .gray))
            
            HStack {
                Text("Paywall.Onetime.Save \(String(model.saving))") + Text("%")
            }
            .foregroundColor(.white)
            .font(.custom("Montserrat-Bold", size: 12))
            .padding(4)
            .background(
                RoundedRectangle(cornerRadius: 20)
                    .fill(
                        LinearGradient(stops:
                                        [Gradient.Stop(color: Color(hex: 0xFB923C, alpha: 1), location: 0.0),
                                         Gradient.Stop(color: Color(hex: 0xEA580C, alpha: 1), location: 1.0),
                                        ], startPoint: .leading, endPoint: .trailing)
                    )
                
            )
            .offset(x: 100, y: -30)
        }
        .padding(.top, 20)
        .contentShape(Rectangle())
        .onTapGesture {
            model.activePlan = .yearly
        }
    }
    
    private var weeklyProduct: some View {
        HStack {
            Text("Paywall.Onetime.3DayFT")
                .font(.custom("Montserrat-SemiBold", size: 16))
                .foregroundColor(.white)
            Spacer()
            VStack(alignment: .trailing) {
                Text("Paywall.Onetime.Then \(model.trialWeeklyPrice)")
                    .font(.custom("Montserrat-SemiBold", size: 14))
                Text("Paywall.Onetime.PerWeek")
                    .font(.custom("Montserrat-Medium", size: 14))
            }
            .foregroundColor(.white)
            
        }
        .modifier(BubbleBg(lineColor: model.activePlan == .weekly ? Color("Confirmed Blue") : .gray))
        .contentShape(Rectangle())
        .onTapGesture {
            model.activePlan = .weekly
        }
    }
    
    private var noPaymentFooter: some View {
        HStack {
            Spacer()
            Image("shield_checkmark")
            Text("No payment now")
            Spacer()
        }
        .font(.custom("Montserrat-Bold", size: 12))
        .foregroundColor(.white)
    }
    
    private var closeButton: some View {
        Button {
            model.closeAction?()
        } label: {
            Image(systemName: "xmark")
                .font(.system(size: isRunningOnIpad ? 17 : 14, weight: .bold))
                .foregroundColor(.white)
        }
        .padding(isRunningOnIpad ? 16 : 10)
        .background(
            ZStack {
                if #available(iOS 15.0, *) {
                    Circle()
                        .fill(.ultraThinMaterial)
                } else {
                    Circle()
                        .fill(Color.gray.opacity(0.2))
                        .overlay(Color.white.opacity(0.3))
                }
            }
        )
        .clipShape(Circle())
        .padding(.leading, isRunningOnIpad ? 50 : 20)
    }
    
    private var footerLinks: some View {
        HStack(alignment: .center) {
            Button {
                model.openTermsOfService()
            } label: {
                Text("Terms of Use")
            }
            
            Text("|")
            
            Button {
                model.openPrivaciyPolicy()
            } label: {
                Text("Privacy Policy")
            }
            
            Text("|")
            
            Button {
                model.restoreAction?()
            } label: {
                Text("Restore")
            }
        }
        .font(.system(size: 12))
        .foregroundColor(.white.opacity(0.8))
        .padding(.bottom, -30)
        .padding(.top, -4)
        .frame(maxWidth: .infinity)
    }
}

struct BubbleBg: ViewModifier {
    let lineColor: Color
    init (lineColor: Color = Color("Confirmed Blue")) {
        self.lineColor = lineColor
    }
    func body(content: Content) -> some View {
        content
            .padding(.vertical, 12)
            .padding(.horizontal, 20)
            .background(
                RoundedRectangle(cornerRadius: 52)
                    .stroke(lineColor, lineWidth: 2)
                    .background(
                        BlurView(style: .dark)
                            .opacity(0.9)
                    )
            )
            .clipShape(RoundedRectangle(cornerRadius: 52))
    }
}

struct BlurView: UIViewRepresentable {
    let style: UIBlurEffect.Style
    init(style: UIBlurEffect.Style) {
        self.style = style
    }
    func makeUIView(context: Context) -> UIVisualEffectView {
        let blurEffect = UIBlurEffect(style: style)
        let blurView = UIVisualEffectView(effect: blurEffect)
        return blurView
    }
    func updateUIView(_ uiView: UIVisualEffectView, context: Context) {}
}

#Preview {
    OneTimePaywallView(model: OneTimePaywallModel(products: VPNSubscription.oneTimeProducts, infos: [.mockWeekly, .mockWeeklyTrial, .mockYearly, .mockWeeklyTrial]))
}