#ifndef APPS_FTP_SERVER
#define APPS_FTP_SERVER

#include <etherlib/etherlib.h>
#include <etherlib/cbd_table.h>

#define FTPS_CTRL_PORT (21) // FTP server control connection port

#define FTPS_EVENT_QUEUE_LENGTH (8) // internal event queue length

#define FTPS_LINEBUF_LEN (63)

/**
 * FTP connection state machine states.
*/
typedef enum {
    FTPS_IDLE, // the server is IDLE
    FTPS_LOGGING_IN, // the client is logging in
    FTPS_ESTABLISHED // the connection is established
} Ftps_ConnState;

/**
 * FTP connection events.
*/
typedef enum {
    FTPEVT_NONE, // no action
    FTPEVT_NEW_CONNECTION, // a new connection was recently initiated
    FTPEVT_CTRL_RECVD, // a control message has been received
} Ftps_ConnEvents;

/**
 * FTP server state.
*/
typedef struct {
    EthInterface * intf; // pointer to associated Ethernet interface
    bool passiveMode; // indicates whether the server is operating in passive mode
    uint16_t passiveModePort; // passive mode port once the passive mode is activated
    cbd connCtrlS; // control connection server
    cbd connCtrl; // established control connection
    cbd connDataS; // data connection server
    cbd connData; // established data connection
    Ftps_ConnState connState; // connection state
    ETHLIB_OS_QUEUE_TYPE eventQ; // event queue
    ETHLIB_OS_SEM_TYPE dataConnHasOpened; // semaphore synchronizing data connection opening
    char lineBuffer[FTPS_LINEBUF_LEN + 1]; // line buffer
} Ftps_State;

void ftps_init();

#endif /* APPS_FTP_SERVER */