//
/*
 * Copyright (c) 2025 BWI GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import SwiftUI

// MARK: Migraion Info View
struct MigrationInfoView: View {
    @Environment(\.dismiss) var dismissView
    @State private var selectedTab = 1
    @EnvironmentObject var themeService: BWIThemeService
    @State var redrawKey = UUID()
    @State var migrationFinished = SharedKeychain.load(account: "migration_finished") == "true"
    
    let username: String
    let getUserName: (() -> String?)?
    
    var body: some View {
        TabView(selection: $selectedTab) {
            if migrationFinished {
                MigrationSuccessView()
                    .tag(1)
            } else {
                MigrationInfoViewOne()
                    .tag(1)
                if !BWIBuildSettings.shared.isManagedViaMDM {
                    MigrationInfoViewTwo(username: username, getUserName: getUserName)
                            .tag(2)
                }
            }
        }
        .id(redrawKey)
        .tabViewStyle(.page)
        .tabViewStyle(.page(indexDisplayMode: .always))
        .background {
            Color(themeService.theme.backgroundColor)
                .edgesIgnoringSafeArea(/*@START_MENU_TOKEN@*/.all/*@END_MENU_TOKEN@*/)
        }
        .onAppear() {
            FeatureBannerVisibilityService().markAsRead()
            NotificationCenter.default.post(name: .bwiMarkTopBannerAsRead, object: self, userInfo: ["type" : "feature_banner"])
        }
        .overlay {
            VStack() {
                HStack() {
                    Spacer()
                    Button {
                        dismissView()
                    } label: {
                        Image(Asset.Images.closeButton.name)
                            .renderingMode(.template)
                            .resizable()
                            .frame(width: 36, height: 36)
                            .foregroundColor(Color(themeService.theme.colors.tertiaryContent))
                            .padding(20)
                    }
                    .accessibilityLabel(BWIL10n.bwiAllCommonClose)
                    .isHidden(BWIBuildSettings.shared.BuMXMigrationInfoLevel > 2)
                }
                Spacer()
                HStack() {
                    Button {
                        withAnimation {
                            selectedTab = 1
                        }
                    } label: {
                        Image(systemName: "arrow.left")
                            .resizable()
                            .frame(width: 24, height: 24)
                            .foregroundStyle(Color(themeService.theme.colors.tertiaryContent))
                            .padding(EdgeInsets(top: 20, leading: 30, bottom: 10, trailing: 30))
                    }
                    .opacity(selectedTab == 1 ? 0 : 1)
                    
                    Spacer()
                    
                    Button {
                        withAnimation {
                            selectedTab = 2
                        }
                    } label: {
                        Image(systemName: "arrow.right")
                            .resizable()
                            .frame(width: 24, height: 24)
                            .foregroundStyle(Color(themeService.theme.colors.tertiaryContent))
                            .padding(EdgeInsets(top: 20, leading: 30, bottom: 10, trailing: 30))
                    }
                    .opacity(selectedTab == 2 ? 0 : 1)
                }
                .isHidden(migrationFinished || BWIBuildSettings.shared.isManagedViaMDM)
                
                if BWIBuildSettings.shared.isManagedViaMDM && BWIBuildSettings.shared.BuMXMigrationInfoLevel < 3 {
                    Button {
                        dismissView()
                    } label: {
                        Text(BWIL10n.bwiAllCommonGotIt)
                            .foregroundColor(Color(ThemeService.shared().theme.backgroundColor))
                    }
                    .buttonStyle(PrimaryActionButtonStyle())
                    .padding()
                }
            }
        }
        .onAppear {
            setupIndicatorColors()
        }
        .onChange(of: themeService.isCurrentThemeDark) { _ in
            setupIndicatorColors()
            redrawKey = UUID()
        }
        .onChange(of: themeService.isCurrentThemeDark) { _ in
            setupIndicatorColors()
            redrawKey = UUID()
        }
    }
    
    private func setupIndicatorColors() {
        UIPageControl.appearance().currentPageIndicatorTintColor = themeService.theme.textPrimaryColor
        UIPageControl.appearance().pageIndicatorTintColor = themeService.theme.textSecondaryColor
    }
}


// MARK: Migraion Info View one
struct MigrationInfoViewOne: View {
    @EnvironmentObject var themeService: BWIThemeService
    
    var body: some View {
        GeometryReader { geo in
            ScrollView(.vertical) {
                VStack(alignment: .center, spacing: 20) {
                    Image("migration_detail_1")
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(height: geo.size.height * 0.35, alignment: .bottom)
                        .frame(maxWidth: geo.size.width - 60)
                        .padding(EdgeInsets(top: 56, leading: 30, bottom: 0, trailing: 30))
                        .accessibilityHidden(true)
                        
                    infoText
                        .frame(width: geo.size.width)
                    
                    Spacer()
                    
                }
                .frame(minHeight: geo.size.height)
                .frame(width: geo.size.width)
            }
            .frame(width: geo.size.width, height: geo.size.height)
        }
    }
    
    var infoText: some View {
        VStack(alignment: .leading) {
            Text(BWIL10n.bwiMobileDialogMMoreTitle)
                .font(.title)
                .bold()
                .lineLimit(nil)
                .fixedSize(horizontal: false, vertical: true)
                .padding(.bottom, 20)
            if BWIBuildSettings.shared.isManagedViaMDM {
                if BWIBuildSettings.shared.BuMXMigrationInfoLevel == 3 {
                    Text(BWIL10n.bwiMobileDialogM3MoreText1Mdm) +
                    Text(BWIL10n.bwiMobileDialogM1MoreText2).bold() +
                    Text(BWIL10n.bwiMobileDialogM1MoreText3)
                } else {
                    Text(BWIL10n.bwiMobileDialogM1MoreText3)
                }
            } else {
                if BWIBuildSettings.shared.BuMXMigrationInfoLevel < 3 {
                    Text(BWIL10n.bwiMobileDialogM1MoreText1) +
                    Text(BWIL10n.bwiMobileDialogM1MoreText2).bold() +
                    Text(BWIL10n.bwiMobileDialogM1MoreText3)
                } else {
                    Text(BWIL10n.bwiMobileDialogM3MoreText1) +
                    Text(BWIL10n.bwiMobileDialogM1MoreText2).bold() +
                    Text(BWIL10n.bwiMobileDialogM1MoreText3)
                }
            }
            VStack(alignment: .leading) {
                HStack(alignment: .top) {
                    Text("•")
                    Text(BWIL10n.bwiMobileDialogM1MoreTextBullet1)
                }
                HStack(alignment: .top) {
                    Text("•")
                    Text(BWIL10n.bwiMobileDialogM1MoreTextBullet2)
                }
                HStack(alignment: .top) {
                    Text("•")
                    Text(BWIL10n.bwiMobileDialogM1MoreTextBullet3)
                }
                HStack(alignment: .top) {
                    Text("•")
                    Text(BWIL10n.bwiMobileDialogM1MoreTextBullet4)
                }
            }
            .multilineTextAlignment(.leading)
            .padding(.leading, 16)
        }
        .lineLimit(nil)
        .fixedSize(horizontal: false, vertical: true)
        .padding(EdgeInsets(top: 10, leading: 30, bottom: 0, trailing: 30))
        .accessibilityElement(children: .ignore)
        .accessibilityLabel(accessibilityLabel)
    }
    
    var accessibilityLabel: String {
        if BWIBuildSettings.shared.BuMXMigrationInfoLevel < 3 && !BWIBuildSettings.shared.isManagedViaMDM {
            return BWIL10n.bwiMobileDialogMMoreTitle + ". " +
            BWIL10n.bwiMobileDialogM1MoreText1 +
            BWIL10n.bwiMobileDialogM1MoreText2 +
            BWIL10n.bwiMobileDialogM1MoreText3 + ", " +
            BWIL10n.bwiMobileDialogM1MoreTextBullet1 + ", " +
            BWIL10n.bwiMobileDialogM1MoreTextBullet2 + ", " +
            BWIL10n.bwiMobileDialogM1MoreTextBullet3 + ", " +
            BWIL10n.bwiMobileDialogM1MoreTextBullet4
        } else {
            return BWIL10n.bwiMobileDialogMMoreTitle + ". " +
            BWIL10n.bwiMobileDialogM3MoreText1 +
            BWIL10n.bwiMobileDialogM1MoreText2 +
            BWIL10n.bwiMobileDialogM1MoreText3 + ", " +
            BWIL10n.bwiMobileDialogM1MoreTextBullet1 + ", " +
            BWIL10n.bwiMobileDialogM1MoreTextBullet2 + ", " +
            BWIL10n.bwiMobileDialogM1MoreTextBullet3 + ", " +
            BWIL10n.bwiMobileDialogM1MoreTextBullet4
        }
    }
}


// MARK: Migraion Info View two
struct MigrationInfoViewTwo: View {
    let username: String
    let getUserName: (() -> String?)?
    @State var lazyLoadedUserName: String? = nil
    @State var showSuccessToast: Bool = false
    @EnvironmentObject var themeService: BWIThemeService
    
    var body: some View {
        GeometryReader { geo in
            ScrollView(.vertical) {
                VStack(alignment: .center, spacing: 20) {
                    VStack() {
                        Image("bumx_logo")
                            .resizable()
                            .frame(width: 200, height: 200)
                            .clipShape(.rect(cornerRadius: 36))
                            .overlay(
                                RoundedRectangle(cornerRadius: 36)
                                    .stroke(.gray, lineWidth: 0.4)
                            )
                            .accessibilityHidden(true)
                    }
                    .frame(height: geo.size.height * 0.35, alignment: .center)
                    .padding(EdgeInsets(top: 56, leading: 30, bottom: 10, trailing: 30))
                        
                    instructionsList
                    
                    successToast
                    
                    Spacer()
                    
                    downloadNewAppButton
                        .frame(maxWidth: 350)
                        .frame(width: geo.size.width - 100)
                        .padding(.bottom, 100)
                }
                .frame(minHeight: geo.size.height)
                .frame(width: geo.size.width)
                .onAppear {
                    lazyLoadedUserName = username.isEmpty ? getUserName?() : username
                }
            }
            .frame(width: geo.size.width, height: geo.size.height)
        }
    }
    
    var instructionsList: some View {
        VStack() {
            VStack(alignment: .center) {
                Text(BWIL10n.bwiMobileDialogMMore2Title)
                    .font(.title)
                    .bold()
                    .padding(.bottom, 20)
            }
            VStack(alignment: .leading) {
                VStack(alignment: .leading) {
                    HStack() {
                        if lazyLoadedUserName != nil {
                            Text("1.")
                            Button(action: {
                                UIPasteboard.general.string = lazyLoadedUserName ?? ""
                                guard !showSuccessToast else { return }
                                withAnimation {
                                    showSuccessToast = true
                                }
                                DispatchQueue.main.asyncAfter(deadline: .now() + 1.5) {
                                    withAnimation {
                                        showSuccessToast = false
                                    }
                                }
                            }, label: {
                                Text(BWIL10n.bwiMobileDialogMMore2Text1)
                                    .underline()
                                    .foregroundColor(Color(themeService.theme.textPrimaryColor))
                                Image(systemName: "square.on.square")
                                    .resizable()
                                    .foregroundColor(Color(themeService.theme.textPrimaryColor))
                                    .frame(width: 15, height: 15)
                            })
                        }
                    }
                    
                    HStack() {
                        // bwi #7555 I know, but its only legacy
                        if lazyLoadedUserName != nil {
                            Text("2.")
                        } else {
                            Text("1.")
                        }
                        Text(BWIL10n.bwiMobileDialogMMore2Text2)
                    }
                    .padding(.bottom, 1)
                    HStack() {
                        if lazyLoadedUserName != nil {
                            Text("3.")
                        } else {
                            Text("2.")
                        }
                        Text(BWIL10n.bwiMobileDialogMMore2Text3)
                    }
                }
            }
        }
        .lineLimit(nil)
        .fixedSize(horizontal: false, vertical: true)
        .padding(EdgeInsets(top: 10, leading: 30, bottom: 0, trailing: 30))
    }
    
    var downloadNewAppButton: some View {
        Button(action: {
            guard let bumxAppStoreURL = URL(string: "itms-apps://itunes.apple.com/app/id6738500048") else { return }
            guard UIApplication.shared.canOpenURL(bumxAppStoreURL) else { return }
            UIApplication.shared.open(bumxAppStoreURL, options: [:], completionHandler: nil)
        }, label: {
            Text(BWIL10n.bwiMobileDialogMMoreButton)
                .foregroundColor(Color(ThemeService.shared().theme.backgroundColor))
        })
        .buttonStyle(PrimaryActionButtonStyle())
    }
    
    var successToast: some View {
        HStack() {
            Image(systemName: "checkmark")
                .resizable()
                .frame(width: 15, height: 15)
                .accessibilityHidden(true)
            Text(BWIL10n.bwiMobileDialogMMoreSuccess)
        }
        .foregroundColor(themeService.isCurrentThemeDark ? .black : .white)
        .padding(10)
        .background(themeService.isCurrentThemeDark ? .white : .black)
        .clipShape(RoundedRectangle(cornerRadius: 10))
        .opacity(showSuccessToast ? 1 : 0)
        .transition(.opacity)
    }
}


// MARK: Migraion Success View
struct MigrationSuccessView: View {
    @EnvironmentObject var themeService: BWIThemeService
    
    var body: some View {
        GeometryReader { geo in
            ScrollView(.vertical) {
                VStack(alignment: .center, spacing: 20) {
                    VStack() {
                        Image("bumx_logo")
                            .resizable()
                            .frame(width: 200, height: 200)
                            .clipShape(.rect(cornerRadius: 36))
                            .overlay(
                                RoundedRectangle(cornerRadius: 36)
                                    .stroke(.gray, lineWidth: 0.4)
                            )
                            .accessibilityHidden(true)
                    }
                    .frame(height: geo.size.height * 0.35, alignment: .center)
                    .padding(EdgeInsets(top: 56, leading: 30, bottom: 10, trailing: 30))

                    VStack {
                        Text(BWIL10n.bwiMobileDialogM3SuccessChangeTitle)
                            .font(.title)
                            .bold()
                            .padding(.bottom, 20)
                        
                        Text(BWIL10n.bwiMobileDialogM3SuccessText)
                            .fixedSize(horizontal: false, vertical: true)
                            .padding(EdgeInsets(top: 10, leading: 30, bottom: 0, trailing: 30))
                    }

                    Spacer()
                }
                .frame(minHeight: geo.size.height)
                .frame(width: geo.size.width)
                
            }
            .frame(width: geo.size.width, height: geo.size.height)
        }
    }
}