GeminiClient.swift

class GeminiClient {
  enum APIKey {

        // Fetch the API key from `GeminiChat.plist`
        static var `default`: String {
            guard let filePath = Bundle.main.path(forResource: "GeminiChat", ofType: "plist")
            else {
              fatalError("Couldn't find file 'GeminiChat.plist'.")
            }
            let plist = NSDictionary(contentsOfFile: filePath)
            guard let value = plist?.object(forKey: "API_KEY") as? String else {
              fatalError("Couldn't find key 'API_KEY' in 'GeminiChat.plist'.")
            }
            if value.starts(with: "_") {
              fatalError(
                "Follow the instructions at https://ai.google.dev/tutorials/setup to get an API key."
              )
            }
            return value
        }
    }
}