#ifndef CMD_H
#define CMD_H

#include <stdbool.h>
#include <stdint.h>
#include "buffer.h"

#define CMD_GET_METRICS 0x00
#define CMD_GET_BUFFER_SIZE 0x01
#define CMD_SET_BUFFER_SIZE 0x02
#define CMD_GET_TIMEOUT 0x03
#define CMD_SET_TIMEOUT 0x04
#define CMD_GET_USER_PAGES 0x05
#define CMD_LIST_USERS 0x06
#define CMD_GET_USER_LAST_CONNECTION 0x07
#define CMD_MODIFY_USERNAME 0x08
#define CMD_MODIFY_PASSWORD 0x09
#define CMD_ADD_USER 0x0A
#define CMD_DELETE_USER 0x00B
#define CMD_GET_PASSWORD_DISSECTOR_STATUS 0x0C
#define CMD_MODIFY_PASSWORD_DISSECTOR_STATUS 0x0D
#define CMD_GET_AUTHENTICATION_STATUS 0x0E
#define CMD_MODIFY_AUTHENTICATION_STATUS 0x0F
#define CMD_GET_PROXY_SERVER_STATUS 0x10
#define CMD_CHANGE_PROXY_SERVER_STATUS 0x11
#define CMD_RESTART_PROXY_SERVER 0x12

#define CMD_NOT_SUPPORTED_CMD 0xFF

enum cmd_state {
    cmd_version,
    cmd_token,
    cmd_cmd,
    cmd_parameters,
    cmd_done,
    cmd_error_unsupported_version,
    cmd_error_invalid_token,
    cmd_error_unsupported_command,
};

enum param_state {
    param_ulen,
    param_uname,
    param_new_ulen,
    param_new_uname,
    param_plen,
    param_passwd,
    param_byte,
    param_value,
};

enum cmd_response_status {
    status_succeeded = 0x00,
    status_failure = 0x01,
};

struct cmd_parser {
    void (* on_token) (struct cmd_parser * parser, const uint64_t token);
    void (* on_cmd) (struct cmd_parser * parser, const uint8_t cmd);
    void * data;
    enum cmd_state state;
    enum param_state param_state;
    uint8_t * cmd;
    uint8_t remaining;
    uint8_t * verified;
    uint64_t token;

    uint8_t idx;

    char username[255];
    char new_username[255];
    char password[255];
    uint8_t byte;
    uint16_t value;

    void * parameters;
};

void cmd_parser_init(struct cmd_parser * p);

enum cmd_state cmd_parser_feed(struct cmd_parser * p, uint8_t b);

enum cmd_state cmd_consume(buffer * b, struct cmd_parser * p, bool * errored);

bool cmd_is_done(enum cmd_state state, bool * errored);

extern const char * cmd_error(const struct cmd_parser * p);

void cmd_parser_close(struct cmd_parser * p);

extern int cmd_marshall(buffer * b, uint8_t method);

#endif