#ifndef MAZE32_PROTOCOL_H
#define MAZE32_PROTOCOL_H

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

#include "maze32_lobby.h"

#ifdef __cplusplus
extern "C" {
#endif

#define MAZE32_PROTOCOL_VERSION 1U
#define MAZE32_PROTOCOL_MESSAGE_LIMIT 512U
#define MAZE32_REQUEST_ID_MAX_BYTES 32U

typedef enum {
    MAZE32_MESSAGE_INVALID = 0,
    MAZE32_MESSAGE_JOIN,
    MAZE32_MESSAGE_RESTORE,
    MAZE32_MESSAGE_START,
    MAZE32_MESSAGE_MOVE,
    MAZE32_MESSAGE_DROP_KEY,
    MAZE32_MESSAGE_HEARTBEAT,
    MAZE32_MESSAGE_SUGGEST_NAME,
} maze32_message_type_t;

typedef enum {
    MAZE32_PROTOCOL_OK = 0,
    MAZE32_PROTOCOL_MALFORMED,
    MAZE32_PROTOCOL_TOO_LARGE,
    MAZE32_PROTOCOL_UNSUPPORTED_VERSION,
    MAZE32_PROTOCOL_UNKNOWN_TYPE,
    MAZE32_PROTOCOL_INVALID_PAYLOAD,
} maze32_protocol_result_t;

typedef struct {
    maze32_message_type_t type;
    uint32_t sequence;
    char request_id[MAZE32_REQUEST_ID_MAX_BYTES + 1U];
    maze32_role_t role;
    char name[MAZE32_PLAYER_NAME_MAX_BYTES + 1U];
    char token[MAZE32_SESSION_TOKEN_HEX_LENGTH + 1U];
    char direction[6U];
} maze32_client_message_t;

maze32_protocol_result_t maze32_protocol_parse(const char* data, size_t length,
                                               maze32_client_message_t* message);
const char* maze32_protocol_result_name(maze32_protocol_result_t result);

#ifdef __cplusplus
}
#endif

#endif