#include "thread.h"

static thread_attr_t thdAttrs[THREAD_ID_MAX]={
    //name          fn              arg             stacksize       prio
    {"ws",          NULL,           NULL,           2*KB,           1},
    {"web",         NULL,           NULL,           4*KB,           1},
    {"snmp",        NULL,           NULL,           2*KB,           1},
    {"power",       NULL,           NULL,           2*KB,           1},
    {"polling",     NULL,           NULL,           2*KB,           1},
    {"mqtt",        NULL,           NULL,           2*KB,           1},
    {"mail",        NULL,           NULL,           2*KB,           1},
    {"ui",          NULL,           NULL,           2*KB,           1},
};
static thread_handle_t thdHandles[THREAD_ID_MAX]={0};


int thread_start(int id, thread_fn fn, void *arg)
{
    if(id<0 || id>=THREAD_ID_MAX || !fn) {
        return -1;
    }
    thread_attr_t *attr=&thdAttrs[id];

    attr->fn = fn;
    attr->arg = arg;
    return thread_startEx(id, attr->name, attr->fn, attr->arg, attr->stksz, attr->prio);
}


int thread_start2(int id)
{
    if(id<0 || id>=THREAD_ID_MAX) {
        return -1;
    }
    thread_attr_t *attr=&thdAttrs[id];
    if(!attr->fn) {
        return -1;
    }

    return thread_startEx(id, attr->name, attr->fn, attr->arg, attr->stksz, attr->prio);
}


int thread_restart(int id)
{
    if(id<0 || id>=THREAD_ID_MAX) {
        return -1;
    }
    thread_attr_t *attr=&thdAttrs[id];
    if(!attr->fn) {
        return -1;
    }

    thread_stop(id);
    return thread_startEx(id, attr->name, attr->fn, attr->arg, attr->stksz, attr->prio);
}


int thread_startEx(int id, const char *name, thread_fn fn, void *arg, int stksz, int prio)
{
    int r;
    pthread_attr_t attr;
    thread_handle_t *h=NULL;

    if(id<0 || id>=THREAD_ID_MAX || !fn) {
        return -1;
    }
    h = &thdHandles[id];

    if(h->running) {
        return -1;
    }

    h->name = name;
    h->arg  = arg;
    h->quit = 0;
    r = pthread_attr_init(&attr);
    if(r) {
        printf("____ thread %d attr init failed\n", id);
        return -1;
    }

#if 1
    r = pthread_attr_setstacksize(&attr, stksz);
    if(r) {
        printf("____ thread %d attr setstacksize %d failed\n", id, stksz);
    }
#endif
    
    r = pthread_create(&h->tid, &attr, fn, h);
    if(r==0) {
        h->running = 1;
#if 0
        r = pthread_setschedprio(h->tid, prio);
        if(r) {
            printf("____ set thread prio %d failed\n", prio);
        }
#endif
    }


    pthread_attr_destroy(&attr);

    return r;
}

int thread_stop(int id)
{
    if(id<0 || id>=THREAD_ID_MAX) {
        return -1;
    }
    thread_handle_t *h=&thdHandles[id];

    h->quit = 1;
    //pthread_detach();
    pthread_join(h->tid, NULL);
    h->tid = 0;
    h->running = 0;
    h->arg = NULL;
    h->fn  = NULL;
    
    return 0;
}


int thread_stop_all(void)
{
    int i;

    for(i=0; i<THREAD_ID_MAX; i++) {
        thread_stop(i);
    }

    return 0;
}


int thread_is_running(int id)
{
    if(id<0 || id>=THREAD_ID_MAX) {
        return 0;
    }
    
    thread_handle_t *h=&thdHandles[id];
    return h->running;
}


int thread_start_simp(thread_fn fn, void *arg, int stksz)
{
    int r;
    pthread_t tid;
    pthread_attr_t attr;

    pthread_attr_init(&attr);
    pthread_attr_setstacksize(&attr, stksz);
    
    r = pthread_create(&tid, &attr, fn, arg);
    pthread_attr_destroy(&attr);

    return r;
}


int thread_print_stacksize(void)
{
    int r;
    size_t size;
    pthread_attr_t attr;

    r = pthread_attr_init(&attr);
    if(r) {
        printf("___ print stacksize, attr init failed\n");
        return -1;
    }
    r = pthread_attr_getstacksize(&attr, &size);
    if(r) {
        printf("___ print stacksize, attr init failed\n");
    }
    else {
        printf("_____ stacksize: %dMB\n", size/(1024*1024));
    }
    pthread_attr_destroy(&attr);
    return r;
}