#ifndef STATEMACHINE_H
#define STATEMACHINE_H
#ifdef __cplusplus
 extern "C" {
#endif

#include "Arduino.h"

/* two displays:
    - initialisation display, shows the state of booting up
    - main display, shows the data from the OBD2 scanner

    each state has a function that can be called when it enters that state, while it's running and when it exits that state
    Example: https://stackoverflow.com/questions/1371460/state-machines-tutorials
*/

/**
 * @brief      State struct. Contains the id of the state, and the functions that are called when the state is entered, running and exited.
*/
typedef struct SM_STATE
{
    int id;
    void (*on_enter)();
    void (*on_run)();
    void (*on_exit)();
} state_t;

/**
 * @brief      Transition struct. Contains the id of the state it transitions to, and the next state.
*/
typedef struct SM_TRANSITION
{
    int state_id;
    state_t *next_state;
} transition_t;

/**
 * @brief      State machine struct. Contains the current state and the transitions.
*/
typedef struct SM_STATE_MACHINE
{
    state_t *current_state;
    transition_t *transitions; /* Transitions between states. Every state's ID is also it's position in the array.*/

} statemachine_t;

/**
 * @brief      Initialises the state machine. Initializes the statemachine struct.
 */
void statemachine_init();
void __state_none() 
{
    /* do nothing*/
}

#ifdef __cplusplus
 }
 #endif
#endif // !STATEMACHINE_H