import UIKit
import Flutter
import CoreMotion

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  private let motionManager = CMMotionManager()
  
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    let controller : FlutterViewController = window?.rootViewController as! FlutterViewController
    let motionChannel = FlutterMethodChannel(name: "com.yourcompany.app/motion",
                                              binaryMessenger: controller.binaryMessenger)
    motionChannel.setMethodCallHandler({
      [weak self] (call: FlutterMethodCall, result: @escaping FlutterResult) -> Void in
      guard let self = self else { return }
      
      switch call.method {
      case "startMotionUpdates":
        self.startMotionUpdates(result: result)
      case "stopMotionUpdates":
        self.stopMotionUpdates(result: result)
      default:
        result(FlutterMethodNotImplemented)
      }
    })
    
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
  
  private func startMotionUpdates(result: @escaping FlutterResult) {
    if motionManager.isDeviceMotionAvailable {
      motionManager.deviceMotionUpdateInterval = 0.1
      motionManager.startDeviceMotionUpdates(to: .main) { (motion, error) in
        DispatchQueue.main.async {
          // ここでUIの更新や状態の取得を行う
          let appState = UIApplication.shared.applicationState
          // 必要な処理を行う
        }
      }
      result(nil)
    } else {
      result(FlutterError(code: "UNAVAILABLE",
                          message: "Device motion is not available.",
                          details: nil))
    }
  }
  
  private func stopMotionUpdates(result: @escaping FlutterResult) {
    motionManager.stopDeviceMotionUpdates()
    result(nil)
  }
}