/*
 * lwftpc.h
 *
 *  Created on: Feb 20, 2024
 *      Author: "SeungJu Lim"
 */

#include <stdio.h>
#include <string.h>
#include "lwip/api.h"

#ifdef __cplusplus
extern "C" {
#endif

#ifndef LWFTPC_H_
#define LWFTPC_H_


enum lwftp_results {
  LWFTP_RESULT_OK=0,
  LWFTP_RESULT_INPROGRESS,
  LWFTP_RESULT_LOGGED,
  LWFTP_RESULT_ERR_UNKNOWN,   /** Unknown error */
  LWFTP_RESULT_ERR_ARGUMENT,  /** Wrong argument */
  LWFTP_RESULT_ERR_MEMORY,    /** Out of memory */
  LWFTP_RESULT_ERR_CONNECT,   /** Connection to server failed */
  LWFTP_RESULT_ERR_HOSTNAME,  /** Failed to resolve server hostname */
  LWFTP_RESULT_ERR_CLOSED,    /** Connection unexpectedly closed by remote server */
  LWFTP_RESULT_ERR_TIMEOUT,   /** Connection timed out (server didn't respond in time) */
  LWFTP_RESULT_ERR_SRVR_RESP, /** Server responded with an unknown response code */
  LWFTP_RESULT_ERR_INTERNAL,  /** Internal network stack error */
  LWFTP_RESULT_ERR_LOCAL,     /** Local storage error */
  LWFTP_RESULT_ERR_FILENAME   /** Remote host could not find file */
};


/** LWFTPC control connection state */
typedef enum  {
  LWFTP_CLOSED=0,
  LWFTP_CONNECTED,
  LWFTP_USER_SENT,
  LWFTP_PASS_SENT,
  LWFTP_LOGGED,
  LWFTP_TYPE_SENT,
  LWFTP_PASV_SENT,
  LWFTP_RETR_SENT,
  LWFTP_STOR_SENT,
  LWFTP_XFERING,
  LWFTP_DATAEND,
  LWFTP_QUIT,
  LWFTP_QUIT_SENT,
  LWFTP_CLOSING,
} lwftp_state_t;


/** LWFTPC session structure */
typedef struct {
  // User interface
	ip_addr_t			cli_ip;
	ip_addr_t			svr_ip;
  u16_t					svr_port;
  u16_t         data_port;
  const char    *user;
  const char    *pass;
  // Internal data
  lwftp_state_t   control_state;
  lwftp_state_t   data_state;
  lwftp_state_t   target_state;
  struct netconn  *conn;
  struct netconn  *data_conn;
} lwftp_session_t;


/** LWFTPC API prototypes*/
err_t lwftp_send(struct netconn *conn, const char *data);
err_t lwftp_data_open(lwftp_session_t *s, const char *response);
void lwftp_data_thread(void *arg);
void lwftp_ctrl_thread(void *arg);

/** for callback*/
typedef void (*lwftp_transfer_callback)(err_t result, void *context);
void onDataReceived(void* data, size_t size);
err_t lwftp_store(lwftp_session_t *s, const char *filename, const char *data);
err_t lwftp_retrieve(lwftp_session_t *s, const char *filename);
err_t lwftp_list(lwftp_session_t *s);


#ifdef __cplusplus
}
#endif

#endif /* LWFTPC_H_ */