#ifndef _INCLUDE_EXTERNAL_INTERFACE_EVENT_
#define _INCLUDE_EXTERNAL_INTERFACE_EVENT_

#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "external_interface.h"

#define ET_TYPE_EVENT 32
#define ET_EVENT_TRIGGER_BUFFER_SIZE 32

#ifdef __cplusplus
extern "C" {
#endif

typedef void (*event_callback)(const char*, size_t, void*, void*);

typedef struct _EventRegister {
    const char* name;
    event_callback callback;
    void* user_data;
} EventRegister, EventUnregister;

typedef struct _EventTrigger {
    const char* name;
    size_t args_size;
    uint8_t args[ET_EVENT_TRIGGER_BUFFER_SIZE];
} EventTrigger;

#ifndef EXINT_EVENT
#define EXINT_EVENT_PUBLIC_FUNC_NAME(name) exint_ ## name
#else
#define EXINT_EVENT_PUBLIC_FUNC_NAME(name) exint_public_ ## name
#endif
#define EXINT_EVENT_PUBLIC static __inline
#define EXINT_EVENT_PUBLIC_FUNC(name) EXINT_EVENT_PUBLIC void EXINT_EVENT_PUBLIC_FUNC_NAME(name)

EXINT_EVENT_PUBLIC_FUNC(event)
(const char* name, const size_t args_size, void* args) {
    if (args_size <= ET_EVENT_TRIGGER_BUFFER_SIZE) {
        EventTrigger trigger = {name, args_size, {0}};
        memcpy(trigger.args, args, args_size);
        exint_send(
            ET_TYPE_EVENT,
            sizeof(EventTrigger) + args_size - ET_EVENT_TRIGGER_BUFFER_SIZE,
            &trigger
        );
    } else {
        EventTrigger* trigger = (EventTrigger*)malloc(sizeof(EventTrigger) + args_size - ET_EVENT_TRIGGER_BUFFER_SIZE);
        if (trigger == NULL) return;
        trigger->name = name;
        trigger->args_size = args_size;
        memcpy(trigger->args, args, args_size);
        exint_send(
            ET_TYPE_EVENT,
            sizeof(EventTrigger) + args_size - ET_EVENT_TRIGGER_BUFFER_SIZE,
            trigger
        );
        free(trigger);
    }
}

EXINT_EVENT_PUBLIC_FUNC(event_register)
(const char *event_name, event_callback callback, void* user_data) {
    EventRegister register_ = {event_name, callback, user_data};
    EXINT_EVENT_PUBLIC_FUNC_NAME(event)("event_register", sizeof(EventRegister), &register_);
}

EXINT_EVENT_PUBLIC_FUNC(event_unregister)
(const char *event_name, event_callback callback, void* user_data) {
    EventUnregister unregister = {event_name, callback, user_data};
    EXINT_EVENT_PUBLIC_FUNC_NAME(event)("event_unregister", sizeof(EventUnregister), &unregister);
}

#ifdef __cplusplus
}
#endif

#endif