(in-package #:chatikbot)

(defparameter +vk-api-url+ "https://api.vk.com/method/~A?v=5.40" "VK.com API endpoint")

(defun %vk-api-call (method &optional args)
  (handler-case
      (bordeaux-threads:with-timeout (5)
        (let* ((params (loop for (k . v) in args
                          when v
                          collect (cons
                                   (princ-to-string k)
                                   (princ-to-string v))))
               (response (json-request (format nil +vk-api-url+ method)
                                       :method :post
                                       :parameters params)))
          (when (aget "error" response)
            (error (aget "error_msg" (aget "error" response))))
          (aget "response" response)))
    (bordeaux-threads:timeout (e)
      (declare (ignore e))
      (error "Timeout"))))

(defun vk-wall-get (&key owner-id domain offset count filter extended fields)
  (%vk-api-call "wall.get"
                `(("owner_id" . ,owner-id)
                  ("domain" . ,domain)
                  ("offset" . ,offset)
                  ("count" . ,count)
                  ("filter" . ,filter)
                  ("extended" . ,extended)
                  ("fields" . ,fields))))

(defun vk-get-user-name (id)
  (let ((r (first (%vk-api-call "users.get" `(("user_ids" . ,id))))))
    (format nil "~A ~A" (aget "first_name" r) (aget "last_name" r))))

(defun vk-get-group-name (id)
  (aget "name" (first (%vk-api-call "groups.getById"
                                    `(("group_id" . ,(if (numberp id)
                                                         (- id)
                                                         id)))))))

(defun vk-get-name (id)
  (if (and (numberp id) (> id 0))
      (vk-get-user-name id)
      (vk-get-group-name id)))