// Generated manually and inspired by libwaku.h
// Header file for Logos Messaging API (LMAPI) library
#ifndef __liblmapi__
#define __liblmapi__

#include <stddef.h>
#include <stdint.h>

// The possible returned values for the functions that return int
#define RET_OK 0
#define RET_ERR 1
#define RET_MISSING_CALLBACK 2

#ifdef __cplusplus
extern "C"
{
#endif

  typedef void (*FFICallBack)(int callerRet, const char *msg, size_t len, void *userData);

  // Creates a new instance of the node from the given configuration JSON.
  // Returns a pointer to the Context needed by the rest of the API functions.
  // Configuration should be in JSON format following the NodeConfig structure.
  void *lmapi_create_node(
      const char *configJson,
      FFICallBack callback,
      void *userData);

  // Starts the node.
  int lmapi_start_node(void *ctx,
                       FFICallBack callback,
                       void *userData);

  // Stops the node.
  int lmapi_stop_node(void *ctx,
                      FFICallBack callback,
                      void *userData);

  // Destroys an instance of a node created with lmapi_create_node
  int lmapi_destroy(void *ctx,
                    FFICallBack callback,
                    void *userData);

  // Subscribe to a content topic.
  // contentTopic: string representing the content topic (e.g., "/myapp/1/chat/proto")
  int lmapi_subscribe(void *ctx,
                      FFICallBack callback,
                      void *userData,
                      const char *contentTopic);

  // Unsubscribe from a content topic.
  int lmapi_unsubscribe(void *ctx,
                        FFICallBack callback,
                        void *userData,
                        const char *contentTopic);

  // Send a message.
  // messageJson: JSON string with the following structure:
  // {
  //   "contentTopic": "/myapp/1/chat/proto",
  //   "payload": "base64-encoded-payload",
  //   "ephemeral": false
  // }
  // Returns a request ID that can be used to track the message delivery.
  int lmapi_send(void *ctx,
                 FFICallBack callback,
                 void *userData,
                 const char *messageJson);

  // Sets a callback that will be invoked whenever an event occurs.
  // It is crucial that the passed callback is fast, non-blocking and potentially thread-safe.
  void lmapi_set_event_callback(void *ctx,
                                 FFICallBack callback,
                                 void *userData);

#ifdef __cplusplus
}
#endif

#endif /* __liblmapi__ */