#include "app_scheduler.h"
#include <string.h>

#define APP_JOB_QUEUE_SIZE 8

static app_job_t g_queue[APP_JOB_QUEUE_SIZE];
static uint8_t g_head;
static uint8_t g_tail;
static uint8_t g_count;

void app_scheduler_init(void)
{
    g_head = 0;
    g_tail = 0;
    g_count = 0;
    memset(g_queue, 0, sizeof(g_queue));
}

int app_scheduler_push(const app_job_t *job)
{
    if (!job) return 0;
    if (g_count >= APP_JOB_QUEUE_SIZE) return 0;

    g_queue[g_tail] = *job;
    g_tail = (uint8_t)((g_tail + 1U) % APP_JOB_QUEUE_SIZE);
    g_count++;
    return 1;
}

int app_scheduler_pop(app_job_t *job)
{
    if (!job) return 0;
    if (g_count == 0) return 0;

    *job = g_queue[g_head];
    g_head = (uint8_t)((g_head + 1U) % APP_JOB_QUEUE_SIZE);
    g_count--;
    return 1;
}

int app_scheduler_is_empty(void)
{
    return (g_count == 0U);
}
void app_scheduler_clear(void)
{
    g_head = 0;
    g_tail = 0;
    g_count = 0;
    memset(g_queue, 0, sizeof(g_queue));
}