/*
 * This file is part of Cleanflight.
 *
 * Cleanflight is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Cleanflight is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include "common/streambuf.h"

// return positive for ACK, negative on error, zero for no reply
typedef enum {
    MSP_RESULT_ACK = 1,
    MSP_RESULT_ERROR = -1,
    MSP_RESULT_NO_REPLY = 0,
    MSP_RESULT_CMD_UNKNOWN = -2,   // don't know how to process command, try next handler
} mspResult_e;

typedef enum {
    MSP_DIRECTION_REPLY = 0,
    MSP_DIRECTION_REQUEST = 1
} mspDirection_e;

typedef struct mspPacket_s {
    sbuf_t buf;
    int16_t cmd;
    int16_t result;
    uint8_t direction;
} mspPacket_t;

struct serialPort_s;
typedef void (*mspPostProcessFnPtr)(struct serialPort_s *port); // msp post process function, used for gracefully handling reboots, etc.
typedef mspResult_e (*mspProcessCommandFnPtr)(mspPacket_t *cmd, mspPacket_t *reply, mspPostProcessFnPtr *mspPostProcessFn);
typedef void (*mspProcessReplyFnPtr)(mspPacket_t *cmd);
