//
//  AppDelegate.swift
//  copinism
//
//  Created by 黄仕杰 on 2024/6/7.
//

import UIKit
import UserNotifications
import SwiftUI


class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // 设置 UNUserNotificationCenter 的代理
        UNUserNotificationCenter.current().delegate = self

        // 请求推送通知权限
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound]) { granted, error in
            var notify = false
            if granted {
                DispatchQueue.main.async {
                    application.registerForRemoteNotifications()
                }
                notify = true
            } else {
                // 在消息列表的界面可以使用这里的不变量展示让用户去手机设置界面开启通知
                print("用户拒绝通知权限: \(String(describing: error))")
                
            }
            UserDefaults.standard.set(notify, forKey: "notify")
        }
        return true
    }

    // 当设备成功注册推送通知时调用。用来获取设备令牌并发送到服务器
    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
        let tokenParts = deviceToken.map { data in String(format: "%02.2hhx", data) }
        let token = tokenParts.joined()
        print("Device Token: \(token)")
        sendDeviceTokenToServer(token: token)
    }

    // 当设备未能注册推送通知时调用。用来处理和记录错误信息
    func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
        print("Failed to register: \(error)")
    }

    private func sendDeviceTokenToServer(token: String) {
        let url = URL(string: "https://yourserver.com/api/deviceToken")!
        let parameters: [String: Any] = [
            "deviceToken": token,
            "deviceType": "iOS"
        ]
        var request = URLRequest(url: url)
        request.httpMethod = "POST"
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        request.httpBody = try? JSONSerialization.data(withJSONObject: parameters)
        let task = URLSession.shared.dataTask(with: request) { data, response, error in
            if let error = error {
                print("Error sending device token: \(error)")
                return
            }
            print("Device token sent successfully")
        }
        task.resume()
    }

    // 处理接收到的通知
    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        if #available(iOS 14.0, *) {
            completionHandler([.banner, .sound, .badge])
        } else {
            completionHandler([.alert, .sound, .badge])
        }
    }

    // 当用户点击通知或通知到达时触发
    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        // 从锁屏弹出消息到主屏幕
        if response.actionIdentifier == UNNotificationDefaultActionIdentifier {
            // 处理通知，跳转到特定界面
            handleNotification(response.notification)
            
            // 发送本地通知
            let message = Message(text: response.notification.request.content.body, sender: response.notification.request.content.title, timestamp: "" ,isSelf: true, avatar: "avatar")
            sendNotification(for: message)
        }
        completionHandler()
    }


    private func handleNotification(_ notification: UNNotification) {
        // 在这里添加自定义处理逻辑，比如跳转到特定界面
        if let window = window {
            // 假设 ContentView 是你希望跳转到的视图
            let contentView = ContentView()

            // 将 SwiftUI 视图包装为 UIViewController
            let hostingController = UIHostingController(rootView: contentView)

            // 获取 rootViewController 并呈现新的视图
            if let rootViewController = window.rootViewController {
                rootViewController.present(hostingController, animated: true, completion: nil)
            } else {
                window.rootViewController = hostingController
                window.makeKeyAndVisible()
            }
        }
    }

    // 发送本地通知
    private func sendNotification(for message: Message) {
        let content = UNMutableNotificationContent()
        content.title = message.sender
        content.body = message.text
        content.sound = UNNotificationSound.default

        let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 1, repeats: false)
        let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)

        UNUserNotificationCenter.current().add(request)
    }
}