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

#include "zv_types.h"
#include "kernel.h"
#include "task.h"
#include "event.h"
#include "zv_time.h"

static inline bool __zv_event_empty(zv_event_t *self) {
    return self->type == ZV_EVENT_EMPTY;
}

bool zv_event_push_number(
    struct zv_kernel_s *self,
    zv_tid_t target,
    int64_t content
) {
    zv_task_t *task = __zv_kernel_get_task(self, target);
    zv_event_t *event = &task->event;

    if (!__zv_event_empty(event)) {
        return false;
    }

    event->type = ZV_EVENT_DATA;
    event->content.number = content;

    return true;
}

bool zv_event_push_unumber(
    struct zv_kernel_s *self,
    zv_tid_t target,
    uint64_t content
) {
    zv_task_t *task = __zv_kernel_get_task(self, target);
    zv_event_t *event = &task->event;

    if (!__zv_event_empty(event)) {
        return false;
    }

    event->type = ZV_EVENT_DATA;
    event->content.unumber = content;

    return true;
}

bool zv_event_set_timer(
    struct zv_kernel_s *self,
    zv_tid_t target,
    zv_time_t time
) {
    zv_task_t *task = __zv_kernel_get_task(self, target);
    zv_event_t *event = &task->event;

    if (!__zv_event_empty(event)) {
        return false;
    }

    zv_time_t current_time = zv_platform_get_time();
    zv_time_t final_time = current_time + time;

    event->type = ZV_EVENT_TIMER;
    event->content.time = final_time;
    return true;
}

bool zv_event_push_object(
    struct zv_kernel_s *self,
    zv_tid_t target,
    void *content
) {
    if (content == NULL) {
        return false;
    }

    zv_task_t *task = __zv_kernel_get_task(self, target);
    zv_event_t *event = &task->event;

    if (!__zv_event_empty(event)) {
        return false;
    }

    event->type = ZV_EVENT_OBJECT;
    event->content.object = content;
    return true;
}