import Flutter
import UIKit
import FBSDKCoreKit
import os.log

public class ClientProxyFrameworkPlugin: NSObject, FlutterPlugin {
  private var channel: FlutterMethodChannel?

  public static func register(with registrar: FlutterPluginRegistrar) {
    let ch = FlutterMethodChannel(
      name: "client_proxy_framework/facebook_sdk",
      binaryMessenger: registrar.messenger())
    let instance = ClientProxyFrameworkPlugin()
    instance.channel = ch
    registrar.addMethodCallDelegate(instance, channel: ch)
  }

  public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
    switch call.method {
    case "setFacebookSdkDebugLogging":
      let args = call.arguments as? [String: Any]
      let enabled = Self.coerceFacebookSdkDebugLogsArg(args?["enabled"])
      Self.applyFacebookSdkDebugLogging(enabled: enabled)
      result(nil)
    case "waitForFacebookSdkInit":
      let args = call.arguments as? [String: Any]
      let debugLogs = Self.coerceFacebookSdkDebugLogsArg(args?["facebookSdkDebugLogs"])
      Self.applyFacebookSdkDebugLogging(enabled: debugLogs)
      result(true)
      channel?.invokeMethod("onFacebookSdkInitialized", arguments: nil)
    default:
      result(FlutterMethodNotImplemented)
    }
  }

  /// 与 Android 一致：由 `facebook.debugLogs` 或 Dart `setFacebookSdkDebugLogging` 控制。
  private static func applyFacebookSdkDebugLogging(enabled: Bool) {
    if enabled {
      Settings.shared.loggingBehaviors = Set([
        .appEvents,
        .networkRequests,
        .informational,
        .developerErrors,
        .graphAPIDebugInfo,
      ])
      os_log("Facebook SDK debug logging ON (filter console for FBSDK / Facebook)", log: .default, type: .info)
      print("ClientProxyFB: Facebook SDK debug logging ON — also search Xcode console for FBSDK / FacebookSDK")
    } else {
      Settings.shared.loggingBehaviors = []
      os_log("Facebook SDK debug logging OFF", log: .default, type: .info)
      print("ClientProxyFB: Facebook SDK debug logging OFF")
    }
  }

  private static func coerceFacebookSdkDebugLogsArg(_ raw: Any?) -> Bool {
    switch raw {
    case let b as Bool:
      return b
    case let n as NSNumber:
      return n.intValue != 0
    case let s as String:
      let v = s.trimmingCharacters(in: .whitespacesAndNewlines).lowercased()
      return v == "true" || v == "1" || v == "yes"
    default:
      return false
    }
  }
}