/** BEGIN COPYRIGHT BLOCK
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2005 Red Hat, Inc.
 * All rights reserved.
 *
 * License: GPL (version 3 or any later version).
 * See LICENSE for details.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif


#include <prcountr.h>
#include "slap.h"

#if defined(DEBUG)
struct counter
{
    const char *qname;
    const char *rname;
    const char *description;
    PRUint32 before_counter;
    PRUint32 after_counter;
};

static int num_counters = 0;
static struct counter *counters = NULL;

static int
count_counters(void)
{
    int i = 0;
    PR_DEFINE_COUNTER(qh);
    PR_INIT_COUNTER_HANDLE(qh, NULL);
    PR_FIND_NEXT_COUNTER_QNAME(qh, qh);
    while (qh != NULL) {
        PR_DEFINE_COUNTER(rh);
        PR_INIT_COUNTER_HANDLE(rh, NULL);
        PR_FIND_NEXT_COUNTER_RNAME(rh, rh, qh);
        while (rh != NULL) {
            i++;
            PR_FIND_NEXT_COUNTER_RNAME(rh, rh, qh);
        }
        PR_FIND_NEXT_COUNTER_QNAME(qh, qh);
    }
    return i;
}

static int
do_fetch_counters(void)
{
    int i = 0;
    PR_DEFINE_COUNTER(qh);
    PR_INIT_COUNTER_HANDLE(qh, NULL);
    PR_FIND_NEXT_COUNTER_QNAME(qh, qh);
    while (qh != NULL) {
        PR_DEFINE_COUNTER(rh);
        PR_INIT_COUNTER_HANDLE(rh, NULL);
        PR_FIND_NEXT_COUNTER_RNAME(rh, rh, qh);
        while (rh != NULL) {
            if (i < num_counters) {
                counters[i].before_counter = counters[i].after_counter;
                PR_GET_COUNTER_NAME_FROM_HANDLE(rh, &counters[i].qname, &counters[i].rname, &counters[i].description);
                PR_GET_COUNTER(counters[i].after_counter, rh);
            }
            i++;
            PR_FIND_NEXT_COUNTER_RNAME(rh, rh, qh);
        }
        PR_FIND_NEXT_COUNTER_QNAME(qh, qh);
    }
    return i;
}

static void
fetch_counters(void)
{
    int i;
    if (counters == NULL) {
        num_counters = count_counters();
        counters = (struct counter *)calloc(num_counters, sizeof(struct counter));
    }
    i = do_fetch_counters();
    if (i > num_counters) {
        free(counters);
        counters = NULL;
        num_counters = i;
        counters = (struct counter *)calloc(num_counters, sizeof(struct counter));
        do_fetch_counters();
    }
}

static size_t
counter_size(struct counter *counter)
{
    size_t r = 0;
    r += (counter->qname ? strlen(counter->qname) : 0);
    r += (counter->rname ? strlen(counter->rname) : 0);
    r += (counter->description ? strlen(counter->description) : 0);
    return r;
}

static void
counter_dump(char *name, char *value, int i)
{
    PRUint32 diff_counter;
    sprintf(name, "%s_%s_%s", counters[i].qname, counters[i].rname, counters[i].description);
    diff_counter = counters[i].after_counter - counters[i].before_counter;
    sprintf(value, "%d -> %d (%s%d)",
            counters[i].before_counter,
            counters[i].after_counter,
            (diff_counter > 0 ? "+" : ""),
            diff_counter);
}
#endif

void
counters_as_entry(Slapi_Entry *e)
{
#if defined(DEBUG)
    int i;
    fetch_counters();
    for (i = 0; i < num_counters; i++) {
        char value[40];
        char *type = (char *)malloc(counter_size(&counters[i]) + 4);
        counter_dump(type, value, i);
        slapi_entry_attr_set_charptr(e, type, value);
        free(type);
    }
#endif
}


void
counters_to_errors_log(const char *text)
{
#if defined(DEBUG)
    int i;
    fetch_counters();
    slapi_log_err(SLAPI_LOG_DEBUG, "counters_to_errors_log", "Counter Dump - %s\n", text);
    for (i = 0; i < num_counters; i++) {
        char value[40];
        char *type = (char *)malloc(counter_size(&counters[i]) + 4);
        counter_dump(type, value, i);
        slapi_log_err(SLAPI_LOG_DEBUG, "counters_to_errors_log", "%s %s\n", type, value);
        free(type);
    }
#endif
}
