// Copyright 2023-present 650 Industries. All rights reserved.

import ExpoModulesCore
import CoreSpotlight

/// Represents the Info.plist.
public struct InfoPlist {
  public init() {}

  /// Returns the custom URL schemes registered by the app ('CFBundleURLSchemes' array).
  public static func bundleURLSchemes() -> [String] {
    guard let path = Bundle.main.path(forResource: "Info", ofType: "plist") else {
      log.error("Can't find path to Info.plist in the main bundle.")
      return []
    }
    guard
      // swiftlint:disable:next legacy_objc_type
      let infoDict = NSDictionary(contentsOfFile: path) as? [String: AnyObject],
      let anyDictionary = (infoDict["CFBundleURLTypes"] as? [[String: Any]])?.first,
      let urlSchemes = anyDictionary["CFBundleURLSchemes"] as? [String]
    else {
      log.error("Can't find path to CFBundleURLSchemes in the Info.plist.")
      return []
    }
    return urlSchemes
  }
}

func encoded(_ value: String) -> String {
  return value.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed) ?? value
}

func sendFakeDeepLinkEventToReactNative(obj: Any, url: String) {
  NotificationCenter.default.post(
    // swiftlint:disable:next legacy_objc_type
    name: NSNotification.Name(rawValue: "RCTOpenURLNotification"),
    object: obj,
    userInfo: ["url": url])
}

func userInfoToQueryString(_ userInfo: [String: NSSecureCoding]?) -> String {
  guard let userInfo = userInfo else {
    return ""
  }
  var queryString = ""
  for (key, value) in userInfo {
    if let value = value as? String {
      if key != "href" {
        queryString += "&\(encoded(key))=\(encoded(value))"
      }
    }
  }
  return queryString
}

func prefixDeepLink(fragment: String) -> String {
  // This can happen when an NSUserActivity href is used to activate the app.
  if fragment.starts(with: "/") {
    let schemes = InfoPlist.bundleURLSchemes()
    return "\(schemes[0]):/\(fragment)"
  }
  return fragment
}

public class ExpoHeadAppDelegateSubscriber: ExpoAppDelegateSubscriber {
  public func application(
    _ application: UIApplication,
    continue userActivity: NSUserActivity,
    restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void
  ) -> Bool {
    launchedActivity = userActivity

    if let wellKnownHref = userActivity.userInfo?["href"] as? String {
      // From a stored NSUserActivity, e.g. Quick Note or Siri Reminder
      // From other native device to app
      sendFakeDeepLinkEventToReactNative(obj: self, url: prefixDeepLink(fragment: wellKnownHref))
    } else if userActivity.activityType == CSQueryContinuationActionType {
      // From Spotlight search
      if let query = userActivity.userInfo?[CSSearchQueryString] as? String {
        let schemes = InfoPlist.bundleURLSchemes()
        let encodedQuery = query.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed) ?? query
        // swiftlint:disable:next todo
        // TODO(EvanBacon): Allow user to define the scheme using structured data or something.
        // opensearch = Chrome. spotlight = custom thing we're using to identify iOS
        let url = "\(schemes[0])://search?q=\(encodedQuery)&ref=spotlight"

        // https://github.com/search?q=
        sendFakeDeepLinkEventToReactNative(obj: self, url: url)
      }
    }

    return false
  }
}