//
//  SettingsView.swift
//  AIGrammar
//
//  Created by oscar on 2024/3/27.
//

import SwiftUI
import ToastUI

import SafariServices
import FirebaseAnalytics
import SwiftyBeaver

struct FullScreenSafariView: UIViewControllerRepresentable {
    let url: URL
    var onDismiss: (() -> Void)?

    func makeUIViewController(context: UIViewControllerRepresentableContext<FullScreenSafariView>) -> SFSafariViewController {
        let safariViewController = SFSafariViewController(url: url)
        safariViewController.delegate = context.coordinator
        return safariViewController
    }

    func updateUIViewController(_ uiViewController: SFSafariViewController, context: UIViewControllerRepresentableContext<FullScreenSafariView>) {
        // 无需更新
    }

    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }

    class Coordinator: NSObject, SFSafariViewControllerDelegate {
        var parent: FullScreenSafariView

        init(_ parent: FullScreenSafariView) {
            self.parent = parent
        }

        func safariViewControllerDidFinish(_ controller: SFSafariViewController) {
            parent.onDismiss?()
        }
    }
}


struct SettingsView: View {
    @EnvironmentObject var globalEnv: GlobalEnvironment  // 引入环境对象
    
    @State private var isLoading = false  // 控制加载指示器的显示
    @State private var showingToast = false  // 控制是否显示toast
    @State private var toastText = ""
    @State private var showVIPPaymentView = false
    
    @EnvironmentObject var iapManager: IAPManager // 确保在上级视图中已提供 IAPManager
    
    @State private var showingFullSafari = false
    @State private var currentSafariURL = globalEnvironment.userTermsURL
    
    
    @State private var showingAdvancedSettings = false  // 控制高级设置显示的状态
    @State private var useSandboxEnvironment = false
    @State private var useDevelopmentEnvironment = false

    @State private var showingLogShareSheet = false
    @State private var logFileURL: URL?

    var body: some View {
        NavigationView {
            ScrollView {
                VStack(spacing: 0) {
                    // Upgrade to Premium
                    settingItem(icon: "arrow.up.circle", text: "Upgrade to Premium", isBold: true)
                        .onTapGesture {
                            showVIPPaymentView = true
                            
                            // 记录事件
                            Analytics.logEvent(globalAnalyticsEvents.eventEnterPurchase, parameters: [
                                globalAnalyticsEvents.keyPurchaseEntry: globalAnalyticsEvents.valEntrySettingsBtn as NSObject,
                                globalAnalyticsEvents.keyDeviceID: globalEnvironment.deviceID as NSObject
                            ])
                        }
                    
                    // Feedback
                    settingItem(icon: "bubble.left", text: "Feedback")
                        .onTapGesture {
                            // Assuming there's a way to open App Store Feedback
                            openAppStoreFeedback()
                        }
                    
                    // About
                    settingItem(icon: "info.circle", text: "Terms of Use")
                        .onTapGesture {
                            // Code to show About View
                            self.showingFullSafari = true
                            currentSafariURL = globalEnvironment.userTermsURL
                        }
                    
                    // About
                    settingItem(icon: "info.circle", text: "Privacy Policy")
                        .onTapGesture {
                            // Code to show About View
                            self.showingFullSafari = true
                            currentSafariURL = globalEnvironment.userPrivacyURL
                        }
                    
                    // Restore Purchases
                    settingItem(icon: "arrow.clockwise.circle", text: "Restore Purchases", isBold: true)
                        .onTapGesture {
                            restorePurchase()
                        }
                    
                }
                .fullScreenCover(isPresented: $showingFullSafari) {
                    FullScreenSafariView(url: URL(string: currentSafariURL)!, onDismiss: {
                        self.showingFullSafari = false
                    })
                }
                
                // 留出手势操作的空间，但UI上隐藏掉
                gestureArea
                
                if showingAdvancedSettings {
                    VStack {
                        Toggle("Sandbox", isOn: $useSandboxEnvironment)
                        Toggle("TestEnv", isOn: $useDevelopmentEnvironment)
                        HStack {
                            Button("View Logs") {
                                if let logURL = getLogFileURL() {
                                    if FileManager.default.fileExists(atPath: logURL.path) {
                                        logger.info("Log file exists: \(logURL.path)")
                                        self.logFileURL = logURL
                                        self.showingLogShareSheet = true
                                    } else {
                                        logger.error("Log file does not exist.")
                                        self.toastText = "Log file not found."
                                        self.showingToast = true
                                    }
                                } else {
                                    self.toastText = "Log file not found."
                                    self.showingToast = true
                                }
                            }
                            Spacer()
                            Button("Save") {
                                saveSettings()
                                showingAdvancedSettings = false
                            }
                        }
                        .padding(.horizontal,15)
                        .padding(.top, 15)
                    }
                    .padding(.vertical,10)
                    .padding(.horizontal, 20)
                    .background(Color.white)  // Ensure background fills the view
                    .cornerRadius(5)
                }
                
            }
            .background(Color.pink.opacity(0.2))  // Ensure background fills the view
            .navigationBarTitle("Settings", displayMode: .inline)
            .fullScreenCover(isPresented: $showVIPPaymentView) {
                VIPPaymentView()
            }
            .onDisappear {
                self.showingAdvancedSettings = false  // 确保隐藏组件在视图消失时不显示
            }
        }
        .sheet(isPresented: $showingLogShareSheet) {
            if let url = logFileURL {
                ShareSheetLog(activityItems: [url])
            }
        }
        .toast(isPresented: $showingToast, dismissAfter: globalEnvironment.toastPresentMsNormal) {
            HStack {
                Image(systemName: "exclamationmark.bubble")
                    .foregroundColor(.yellow)
                Text(toastText)
                    .foregroundColor(.black)
            }
            .padding()
            .background(Color.white)
            .cornerRadius(8)
            .shadow(radius: 10)
        }
        // 加载指示器
        if isLoading {
            LoadingView()
        }
    }
        
    // 定义隐藏功能
    private var gestureArea: some View {
        Color.clear
            .contentShape(Rectangle())  // 为透明色定义一个矩形可命中区域
            .frame(height: 50)  // 可以根据需要调整手势区域的大小
            .gesture(
                DragGesture(minimumDistance: 50, coordinateSpace: .global)
                    .onEnded { value in
                        // 检查水平移动距离是否足够长，同时限制垂直移动不太大
                        if abs(value.translation.width) > 50 && abs(value.translation.height) < 100 {
                            // 切换高级设置的显示状态
                            logger.info("Advanced Settings.")
                            showingAdvancedSettings.toggle()
                        }
                    }
            )
    }
    
    // 实现保存设置的逻辑
    private func saveSettings() {
        globalEnvironment.SetEnv(isSandBox: useSandboxEnvironment, isTestEnv: useDevelopmentEnvironment)
    }
    
    @ViewBuilder
    private func settingItem(icon: String, text: String, isBold: Bool = false) -> some View {
        HStack {
            Image(systemName: icon)  // Icon on the left side
                .foregroundColor(.gray)
            Text(text)
                .font(.subheadline)
                .fontWeight(isBold ? .bold : .regular)  // Conditional bold based on isBold parameter
                .padding(4)
            Spacer()
        }
        .padding()
        .background(Color.white)  // Background for each setting item
        .padding(.horizontal, 0)  // Add some horizontal padding
        
        // Indent divider to align with the text and extend to the edge
        Divider()
            .padding(.leading, 30)
            .padding(.trailing, 10)
    }

    private func openAppStoreFeedback() {
        let appID = globalEnvironment.APPID  // 替换为您的应用ID
        let urlStr = "https://apps.apple.com/app/id\(appID)?action=write-review"
        if let url = URL(string: urlStr) {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
        }
    }
    
    func restorePurchase(){
        Task {
            await iapManager.restorePurchases() { result in
                switch result {
                case .success(_):
                    self.toastText = "Restored Sucess!"
                    self.showingToast = true
                case .failure(_):
                    self.toastText = "Oh, something went wrong, please try again later."
                    self.showingToast = true
                }
            }
        }
    }
    // 模拟加载数据
    func loadData() {
        isLoading = true
    }
    func loadComplete(){
        isLoading = false
    }
    
}


struct ShareSheetLog: UIViewControllerRepresentable {
    var activityItems: [Any]

    func makeUIViewController(context: Context) -> UIActivityViewController {
        let controller = UIActivityViewController(activityItems: activityItems, applicationActivities: nil)
        return controller
    }

    func updateUIViewController(_ uiViewController: UIActivityViewController, context: Context) {
        // Nothing to update here
    }
}

struct SettingsView_Previews: PreviewProvider {
    static var previews: some View {
        SettingsView()
    }
}


#Preview {
    SettingsView()
}