/*****************************************************************************
 * RRDtool 1.7.0, Copyright 1997-2017 by Tobi Oetiker
 *****************************************************************************
 * rrd_info  Get Information about the configuration of an RRD
 *****************************************************************************/

#include "rrd_tool.h"
#include "rrd_rpncalc.h"
#include "rrd_client.h"
#include <stdarg.h>

/* allocate memory for string */
char     *sprintf_alloc(
    char *fmt,
    ...)
{
    char     *str = NULL;
    va_list   argp;
#ifdef HAVE_VASPRINTF
    va_start( argp, fmt );
    if (vasprintf( &str, fmt, argp ) == -1){
        va_end(argp);
        rrd_set_error ("vasprintf failed.");
        return(NULL);
    }
#else
    int       maxlen = 1024 + strlen(fmt);
    str = (char*)malloc(sizeof(char) * (maxlen + 1));
    if (str != NULL) {
        va_start(argp, fmt);
#ifdef HAVE_VSNPRINTF
        vsnprintf(str, maxlen, fmt, argp);
#else
        vsprintf(str, fmt, argp);
#endif
    }
#endif /* HAVE_VASPRINTF */
    va_end(argp);
    return str;
}

/* the function formerly known as push was renamed to info_push and later
 * rrd_info_push because it is now used outside the scope of this file */
rrd_info_t
    * rrd_info_push(rrd_info_t * info,
                    char *key, rrd_info_type_t type, rrd_infoval_t value)
{
    rrd_info_t *next;

    next = (rrd_info_t*)malloc(sizeof(*next));
    next->next = (rrd_info_t *) 0;
    if (info)
        info->next = next;
    next->type = type;
    next->key = key;
    switch (type) {
    case RD_I_VAL:
        next->value.u_val = value.u_val;
        break;
    case RD_I_CNT:
        next->value.u_cnt = value.u_cnt;
        break;
    case RD_I_INT:
        next->value.u_int = value.u_int;
        break;
    case RD_I_STR:
        next->value.u_str = strdup(value.u_str);
        break;
    case RD_I_BLO:
        next->value.u_blo.size = value.u_blo.size;
        next->value.u_blo.ptr =
            (unsigned char *)malloc(sizeof(unsigned char) * value.u_blo.size);
        memcpy(next->value.u_blo.ptr, value.u_blo.ptr, value.u_blo.size);
        break;
    }
    return (next);
}


rrd_info_t *rrd_info(
    int argc,
    char **argv)
{
    struct optparse_long longopts[] = {
        {"daemon", 'd', OPTPARSE_REQUIRED},
        {"noflush", 'F', OPTPARSE_NONE},
        {0},
    };
    struct    optparse options;
    int       opt;
    rrd_info_t *info;
    char *opt_daemon = NULL;
    int status;
    int flushfirst = 1;

    optparse_init(&options, argc, argv);
    while ((opt = optparse_long(&options, longopts, NULL)) != -1) {
        switch (opt) {
        case 'd':
            if (opt_daemon != NULL) {
                free (opt_daemon);
            }
            opt_daemon = strdup(options.optarg);
            if (opt_daemon == NULL)
            {
                rrd_set_error ("strdup failed.");
                return NULL;
            }
            break;

        case 'F':
            flushfirst = 0;
            break;

        case '?':
            rrd_set_error("%s", options.errmsg);
            if (opt_daemon != NULL) {
            	free (opt_daemon);
            }
            return NULL;
        }
    } /* while (opt != -1) */

    if (options.argc - options.optind != 1) {
        rrd_set_error ("Usage: rrdtool %s [--daemon |-d <addr> [--noflush|-F]] <file>",
                options.argv[0]);
        if (opt_daemon != NULL) {
            free (opt_daemon);
        }
        return NULL;
    }

    if (flushfirst) {
        status = rrdc_flush_if_daemon(opt_daemon, options.argv[options.optind]);
        if (status) {
            if (opt_daemon != NULL) {
            	free (opt_daemon);
            }
            return (NULL);
        }
    }

    rrdc_connect (opt_daemon);
    if (rrdc_is_connected (opt_daemon))
        info = rrdc_info(options.argv[options.optind]);
    else
        info = rrd_info_r(options.argv[options.optind]);

    if (opt_daemon != NULL) {
    	free(opt_daemon);
    }
    return (info);
} /* rrd_info_t *rrd_info */

rrd_info_t *rrd_info_r(
    const char *filename)
{
    unsigned int i, ii = 0;
    rrd_t     rrd;
    rrd_info_t *data = NULL, *cd;
    rrd_infoval_t info;
    rrd_file_t *rrd_file;
    enum cf_en current_cf;
    enum dst_en current_ds;

    rrd_init(&rrd);
    rrd_file = rrd_open(filename, &rrd, RRD_READONLY);
    if (rrd_file == NULL)
        goto err_free;

    info.u_str = (char *)filename;
    cd = rrd_info_push(NULL, sprintf_alloc("filename"), RD_I_STR, info);
    data = cd;

    info.u_str = rrd.stat_head->version;
    cd = rrd_info_push(cd, sprintf_alloc("rrd_version"), RD_I_STR, info);

    info.u_cnt = rrd.stat_head->pdp_step;
    cd = rrd_info_push(cd, sprintf_alloc("step"), RD_I_CNT, info);

    info.u_cnt = rrd.live_head->last_up;
    cd = rrd_info_push(cd, sprintf_alloc("last_update"), RD_I_CNT, info);

    info.u_cnt = rrd_get_header_size(&rrd);
    cd = rrd_info_push(cd, sprintf_alloc("header_size"), RD_I_CNT, info);

    for (i = 0; i < rrd.stat_head->ds_cnt; i++) {

        info.u_cnt=i;
        cd= rrd_info_push(cd,sprintf_alloc("ds[%s].index",
                                     rrd.ds_def[i].ds_nam),
                     RD_I_CNT, info);
    
        info.u_str = rrd.ds_def[i].dst;
        cd = rrd_info_push(cd, sprintf_alloc("ds[%s].type",
                                             rrd.ds_def[i].ds_nam),
                           RD_I_STR, info);

        current_ds = dst_conv(rrd.ds_def[i].dst);
        switch (current_ds) {
        case DST_CDEF:
        {
            char     *buffer = NULL;

            rpn_compact2str((rpn_cdefds_t *) &(rrd.ds_def[i].par[DS_cdef]),
                            rrd.ds_def, &buffer);
            info.u_str = buffer;
            cd = rrd_info_push(cd,
                               sprintf_alloc("ds[%s].cdef",
                                             rrd.ds_def[i].ds_nam), RD_I_STR,
                               info);
            free(buffer);
        }
            break;
        default:
            info.u_cnt = rrd.ds_def[i].par[DS_mrhb_cnt].u_cnt;
            cd = rrd_info_push(cd,
                               sprintf_alloc("ds[%s].minimal_heartbeat",
                                             rrd.ds_def[i].ds_nam), RD_I_CNT,
                               info);

            info.u_val = rrd.ds_def[i].par[DS_min_val].u_val;
            cd = rrd_info_push(cd,
                               sprintf_alloc("ds[%s].min",
                                             rrd.ds_def[i].ds_nam), RD_I_VAL,
                               info);

            info.u_val = rrd.ds_def[i].par[DS_max_val].u_val;
            cd = rrd_info_push(cd,
                               sprintf_alloc("ds[%s].max",
                                             rrd.ds_def[i].ds_nam), RD_I_VAL,
                               info);
            break;
        }

        info.u_str = rrd.pdp_prep[i].last_ds;
        cd = rrd_info_push(cd,
                           sprintf_alloc("ds[%s].last_ds",
                                         rrd.ds_def[i].ds_nam), RD_I_STR,
                           info);

        info.u_val = rrd.pdp_prep[i].scratch[PDP_val].u_val;
        cd = rrd_info_push(cd,
                           sprintf_alloc("ds[%s].value",
                                         rrd.ds_def[i].ds_nam), RD_I_VAL,
                           info);

        info.u_cnt = rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt;
        cd = rrd_info_push(cd,
                           sprintf_alloc("ds[%s].unknown_sec",
                                         rrd.ds_def[i].ds_nam), RD_I_CNT,
                           info);
    }

    for (i = 0; i < rrd.stat_head->rra_cnt; i++) {
        info.u_str = rrd.rra_def[i].cf_nam;
        cd = rrd_info_push(cd, sprintf_alloc("rra[%d].cf", i), RD_I_STR,
                           info);
        current_cf = rrd_cf_conv(rrd.rra_def[i].cf_nam);

        info.u_cnt = rrd.rra_def[i].row_cnt;
        cd = rrd_info_push(cd, sprintf_alloc("rra[%d].rows", i), RD_I_CNT,
                           info);

        info.u_cnt = rrd.rra_ptr[i].cur_row;
        cd = rrd_info_push(cd, sprintf_alloc("rra[%d].cur_row", i), RD_I_CNT,
                           info);

        info.u_cnt = rrd.rra_def[i].pdp_cnt;
        cd = rrd_info_push(cd, sprintf_alloc("rra[%d].pdp_per_row", i),
                           RD_I_CNT, info);

        switch (current_cf) {
        case CF_HWPREDICT:
        case CF_MHWPREDICT:
            info.u_val = rrd.rra_def[i].par[RRA_hw_alpha].u_val;
            cd = rrd_info_push(cd, sprintf_alloc("rra[%d].alpha", i),
                               RD_I_VAL, info);
            info.u_val = rrd.rra_def[i].par[RRA_hw_beta].u_val;
            cd = rrd_info_push(cd, sprintf_alloc("rra[%d].beta", i), RD_I_VAL,
                               info);
            break;
        case CF_SEASONAL:
        case CF_DEVSEASONAL:
            info.u_val = rrd.rra_def[i].par[RRA_seasonal_gamma].u_val;
            cd = rrd_info_push(cd, sprintf_alloc("rra[%d].gamma", i),
                               RD_I_VAL, info);
            if (atoi(rrd.stat_head->version) >= 4) {
                info.u_val =
                    rrd.rra_def[i].par[RRA_seasonal_smoothing_window].u_val;
                cd = rrd_info_push(cd,
                                   sprintf_alloc("rra[%d].smoothing_window",
                                                 i), RD_I_VAL, info);
            }
            break;
        case CF_FAILURES:
            info.u_val = rrd.rra_def[i].par[RRA_delta_pos].u_val;
            cd = rrd_info_push(cd, sprintf_alloc("rra[%d].delta_pos", i),
                               RD_I_VAL, info);
            info.u_val = rrd.rra_def[i].par[RRA_delta_neg].u_val;
            cd = rrd_info_push(cd, sprintf_alloc("rra[%d].delta_neg", i),
                               RD_I_VAL, info);
            info.u_cnt = rrd.rra_def[i].par[RRA_failure_threshold].u_cnt;
            cd = rrd_info_push(cd,
                               sprintf_alloc("rra[%d].failure_threshold", i),
                               RD_I_CNT, info);
            info.u_cnt = rrd.rra_def[i].par[RRA_window_len].u_cnt;
            cd = rrd_info_push(cd, sprintf_alloc("rra[%d].window_length", i),
                               RD_I_CNT, info);
            break;
        case CF_DEVPREDICT:
            break;
        default:
            info.u_val = rrd.rra_def[i].par[RRA_cdp_xff_val].u_val;
            cd = rrd_info_push(cd, sprintf_alloc("rra[%d].xff", i), RD_I_VAL,
                               info);
            break;
        }

        for (ii = 0; ii < rrd.stat_head->ds_cnt; ii++) {
            switch (current_cf) {
            case CF_HWPREDICT:
            case CF_MHWPREDICT:
                info.u_val =
                    rrd.cdp_prep[i * rrd.stat_head->ds_cnt +
                                 ii].scratch[CDP_hw_intercept].u_val;
                cd = rrd_info_push(cd,
                                   sprintf_alloc
                                   ("rra[%d].cdp_prep[%d].intercept", i, ii),
                                   RD_I_VAL, info);
                info.u_val =
                    rrd.cdp_prep[i * rrd.stat_head->ds_cnt +
                                 ii].scratch[CDP_hw_slope].u_val;
                cd = rrd_info_push(cd,
                                   sprintf_alloc("rra[%d].cdp_prep[%d].slope",
                                                 i, ii), RD_I_VAL, info);
                info.u_cnt =
                    rrd.cdp_prep[i * rrd.stat_head->ds_cnt +
                                 ii].scratch[CDP_null_count].u_cnt;
                cd = rrd_info_push(cd,
                                   sprintf_alloc
                                   ("rra[%d].cdp_prep[%d].NaN_count", i, ii),
                                   RD_I_CNT, info);
                break;
            case CF_SEASONAL:
                info.u_val =
                    rrd.cdp_prep[i * rrd.stat_head->ds_cnt +
                                 ii].scratch[CDP_hw_seasonal].u_val;
                cd = rrd_info_push(cd,
                                   sprintf_alloc
                                   ("rra[%d].cdp_prep[%d].seasonal", i, ii),
                                   RD_I_VAL, info);
                break;
            case CF_DEVSEASONAL:
                info.u_val =
                    rrd.cdp_prep[i * rrd.stat_head->ds_cnt +
                                 ii].scratch[CDP_seasonal_deviation].u_val;
                cd = rrd_info_push(cd,
                                   sprintf_alloc
                                   ("rra[%d].cdp_prep[%d].deviation", i, ii),
                                   RD_I_VAL, info);
                break;
            case CF_DEVPREDICT:
                break;
            case CF_FAILURES:
            {
                unsigned short j;
                char     *violations_array;
                char      history[MAX_FAILURES_WINDOW_LEN + 1];

                violations_array =
                    (char *) rrd.cdp_prep[i * rrd.stat_head->ds_cnt +
                                          ii].scratch;
                for (j = 0; j < rrd.rra_def[i].par[RRA_window_len].u_cnt; ++j)
                    history[j] = (violations_array[j] == 1) ? '1' : '0';
                history[j] = '\0';
                info.u_str = history;
                cd = rrd_info_push(cd,
                                   sprintf_alloc
                                   ("rra[%d].cdp_prep[%d].history", i, ii),
                                   RD_I_STR, info);
            }
                break;
            default:
                info.u_val =
                    rrd.cdp_prep[i * rrd.stat_head->ds_cnt +
                                 ii].scratch[CDP_val].u_val;
                cd = rrd_info_push(cd,
                                   sprintf_alloc("rra[%d].cdp_prep[%d].value",
                                                 i, ii), RD_I_VAL, info);
                info.u_cnt =
                    rrd.cdp_prep[i * rrd.stat_head->ds_cnt +
                                 ii].scratch[CDP_unkn_pdp_cnt].u_cnt;
                cd = rrd_info_push(cd,
                                   sprintf_alloc
                                   ("rra[%d].cdp_prep[%d].unknown_datapoints",
                                    i, ii), RD_I_CNT, info);
                break;
            }
        }
    }

    rrd_close(rrd_file);
  err_free:
    rrd_free(&rrd);
    return (data);
}


void rrd_info_print(
    rrd_info_t * data)
{
    while (data) {
        printf("%s = ", data->key);

        switch (data->type) {
        case RD_I_VAL:
            if (isnan(data->value.u_val))
                printf("NaN\n");
            else
                printf("%0.10e\n", data->value.u_val);
            break;
        case RD_I_CNT:
            printf("%lu\n", data->value.u_cnt);
            break;
        case RD_I_INT:
            printf("%d\n", data->value.u_int);
            break;
        case RD_I_STR:
            printf("\"%s\"\n", data->value.u_str);
            break;
        case RD_I_BLO:
            printf("BLOB_SIZE:%lu\n", data->value.u_blo.size);
            fwrite(data->value.u_blo.ptr, data->value.u_blo.size, 1, stdout);
            break;
        }
        data = data->next;
    }
}

void rrd_info_free(
    rrd_info_t * data)
{
    rrd_info_t *save;

    while (data) {
        save = data;
        if (data->key) {
            if (data->type == RD_I_STR) {
                free(data->value.u_str);
            }
            if (data->type == RD_I_BLO) {
                free(data->value.u_blo.ptr);
            }
            free(data->key);
        }
        data = data->next;
        free(save);
    }
}
