import Flutter
import UIKit
import UserNotifications

@objc(FlutterPushPlugin)
public class FlutterPushPlugin: NSObject, FlutterPlugin {
    public static func register(with registrar: FlutterPluginRegistrar) {
        let channel = FlutterMethodChannel(name: "ewin:flutter_push", binaryMessenger: registrar.messenger())
        let instance = FlutterPushPlugin()
        registrar.addMethodCallDelegate(instance, channel: channel)
    }

    @objc public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
        switch call.method {
        case "getPlatformVersion":
            result("iOS " + UIDevice.current.systemVersion)
        case "init":
            print("init初始化")
            // 初始化
            UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { granted, _ in
                if granted {
                    print("有通知权限")
                    DispatchQueue.main.async {
                        UIApplication.shared.registerForRemoteNotifications()
                    }
                } else {
                    print("无用通知权限")
                }
            }
            result(true)
        case "checkPermission":
            print("checkPermission检测权限")
            UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { granted, _ in
                if granted {
                    print("有通知权限")
                } else {
                    print("无用通知权限")
                }
            }
            result(true)
        case "getPermission":
            print("getPermission跳转设置获取权限")
            if #available(iOS 15.0, *) {
                // iOS 15 及以上版本，直接跳转到通知设置页面
                if let url = URL(string: "App-Prefs:NOTIFICATIONS_ID") {
                    UIApplication.shared.open(url, options: [:], completionHandler: nil)
                }
            } else {
                // iOS 15 以下版本，跳转到应用的设置页面
                if let url = URL(string: UIApplication.openSettingsURLString) {
                    UIApplication.shared.open(url, options: [:], completionHandler: nil)
                }
            }
            result(true)
        default:
            result(FlutterMethodNotImplemented)
        }
    }
}