#ifndef BSP_STM32_RTEMS_NETWORKING_TMTCUDPBRIDGE_H_
#define BSP_STM32_RTEMS_NETWORKING_TMTCUDPBRIDGE_H_

#include <fsfw/tmtcservices/TmTcBridge.h>

#include <lwip/udp.h>
#include <lwip/ip_addr.h>

#define TCPIP_RECV_WIRETAPPING 0

/**
 * This bridge is used to forward TMTC packets received via LwIP UDP to the internal software bus.
 */
class TmTcLwIpUdpBridge : public TmTcBridge {
    friend class UdpTcLwIpPollingTask;
public:
    TmTcLwIpUdpBridge(object_id_t objectId,
            object_id_t ccsdsPacketDistributor, object_id_t tmStoreId,
            object_id_t tcStoreId);
    virtual ~TmTcLwIpUdpBridge();

    virtual ReturnValue_t initialize() override;
    ReturnValue_t udp_server_init();

    /**
     * In addition to default implementation, ethernet link status is checked.
     * @param operationCode
     * @return
     */
    virtual ReturnValue_t performOperation(uint8_t operationCode = 0) override;

    /** TM Send implementation uses udp_send function from lwIP stack
     * @param data
     * @param dataLen
     * @return
     */
    virtual ReturnValue_t sendTm(const uint8_t * data, size_t dataLen) override;

    /**
     * @brief This function is called when an UDP datagram has been
     * received on the port UDP_PORT.
     * @param arg
     * @param upcb_
     * @param p
     * @param addr Source address which will be bound to TmTcUdpBridge::lastAdd
     * @param port
     */
    static void udp_server_receive_callback(void *arg,
            struct udp_pcb *upcb_, struct pbuf *p, const ip_addr_t *addr,
            u16_t port);

    /**
     * Check whether the communication link is up.
     * Caller must ensure thread-safety by using the bridge lock.
     * @return
     */
    bool comLinkUp() const;

private:
    struct udp_pcb *upcb = nullptr;
    ip_addr_t lastAdd;
    u16_t lastPort = 0;
    bool physicalConnection = false;
    MutexIF* bridgeLock = nullptr;

#if TCPIP_RECV_WIRETAPPING == 1
    bool connectFlag = false;
#endif

    /**
     * Used to notify bridge about change in the physical ethernet connection.
     * Connection does not mean that replies are possible (recipient not set yet), but
     * disconnect means that we can't send anything. Caller must ensure thread-safety
     * by using the bridge lock.
     */
    void physicalConnectStatusChange(bool connect);
};

#endif /* BSP_STM32_RTEMS_NETWORKING_TMTCUDPBRIDGE_H_ */