//
// Created by Hydro on 2026/4/21.
//
#ifndef QF_FSM_FSM_H
#define QF_FSM_FSM_H
#include <stdbool.h>
#include <stdint.h>
#define EVENT_QUEUE_LEN             16
#define EVENT_QUEUE_HANDLE_MAX_SIZE 32

typedef enum
{
    FSM_OK,
    FSM_FAIL
} fsm_result_e;
typedef struct qf_fsm_event      fsm_event_t;
typedef struct qf_fsm            fsm_handle_t;
typedef struct qf_fsm_transition fsm_transition_t;
typedef fsm_result_e (*fsm_cb)(void *userdata);
typedef fsm_result_e (*fsm_event_queue_init)(void  *queue_handle,
                                             void  *data_ptr,
                                             size_t size);
typedef fsm_result_e (*fsm_event_queue_get)(void        *handle_ptr,
                                            fsm_event_t *event);
typedef fsm_result_e (*fsm_event_queue_put)(void        *handle_ptr,
                                            fsm_event_t *event);
typedef struct qf_fsm_state
{
    uint16_t state;
    fsm_cb   on_exit;
    fsm_cb   on_event;
    fsm_cb   on_entry;
    void    *user_data;
} fsm_state_t;
struct qf_fsm_transition
{
    uint16_t state;
    uint16_t event;
    uint16_t next_state;
    fsm_cb   on_action;
};
struct qf_fsm_event
{
    uint16_t event;
    void    *user_data;
};
struct qf_fsm
{
    fsm_state_t         *current_state;
    char                *name;
    uint16_t             num_states;
    fsm_state_t         *p_state_list;
    uint32_t             num_trans;
    fsm_transition_t    *p_trans_list;
    uint8_t              event_queue_handle[EVENT_QUEUE_HANDLE_MAX_SIZE];
    fsm_event_t          event_queue[EVENT_QUEUE_LEN];
    bool                 custom_queue;
    fsm_event_queue_init event_queue_init;
    fsm_event_queue_put  event_queue_put;
    fsm_event_queue_get  event_queue_get;
};
fsm_result_e fsm_init(fsm_handle_t *handle_ptr, uint16_t init_state);
fsm_result_e fsm_init_with_queue(fsm_handle_t        *handle_ptr,
                                 uint16_t             init_state,
                                 fsm_event_queue_init event_queue_init,
                                 fsm_event_queue_put  event_queue_put,
                                 fsm_event_queue_get  event_queue_get);
fsm_result_e fsm_event_put(fsm_handle_t *handle_ptr, fsm_event_t *event);
fsm_result_e fsm_process_queue(fsm_handle_t *handle_ptr);
fsm_result_e fsm_dispatch(fsm_handle_t *handle_ptr, const fsm_event_t *event);
fsm_state_t *fsm_get_state(const fsm_handle_t *h);
#endif // QF_FSM_FSM_H