// SPDX-License-Identifier: GPL-3.0-or-later

#include "web/api/web_api_v1.h"

void rrd_stats_api_v1_chart(RRDSET *st, BUFFER *wb) {
    rrdset2json(st, wb, NULL, NULL);
}

void rrdr_buffer_print_format(BUFFER *wb, uint32_t format)  {
    switch(format) {
        case DATASOURCE_JSON:
            buffer_strcat(wb, DATASOURCE_FORMAT_JSON);
            break;

        case DATASOURCE_DATATABLE_JSON:
            buffer_strcat(wb, DATASOURCE_FORMAT_DATATABLE_JSON);
            break;

        case DATASOURCE_DATATABLE_JSONP:
            buffer_strcat(wb, DATASOURCE_FORMAT_DATATABLE_JSONP);
            break;

        case DATASOURCE_JSONP:
            buffer_strcat(wb, DATASOURCE_FORMAT_JSONP);
            break;

        case DATASOURCE_SSV:
            buffer_strcat(wb, DATASOURCE_FORMAT_SSV);
            break;

        case DATASOURCE_CSV:
            buffer_strcat(wb, DATASOURCE_FORMAT_CSV);
            break;

        case DATASOURCE_TSV:
            buffer_strcat(wb, DATASOURCE_FORMAT_TSV);
            break;

        case DATASOURCE_HTML:
            buffer_strcat(wb, DATASOURCE_FORMAT_HTML);
            break;

        case DATASOURCE_JS_ARRAY:
            buffer_strcat(wb, DATASOURCE_FORMAT_JS_ARRAY);
            break;

        case DATASOURCE_SSV_COMMA:
            buffer_strcat(wb, DATASOURCE_FORMAT_SSV_COMMA);
            break;

        default:
            buffer_strcat(wb, "unknown");
            break;
    }
}

int rrdset2value_api_v1(
          RRDSET *st
        , BUFFER *wb
        , calculated_number *n
        , const char *dimensions
        , long points
        , long long after
        , long long before
        , int group_method
        , long group_time
        , uint32_t options
        , time_t *db_after
        , time_t *db_before
        , int *value_is_null
) {
    RRDR *r = rrd2rrdr(st, points, after, before, group_method, group_time, options, dimensions);
    if(!r) {
        if(value_is_null) *value_is_null = 1;
        return HTTP_RESP_INTERNAL_SERVER_ERROR;
    }

    if(rrdr_rows(r) == 0) {
        rrdr_free(r);

        if(db_after)  *db_after  = 0;
        if(db_before) *db_before = 0;
        if(value_is_null) *value_is_null = 1;

        return HTTP_RESP_BAD_REQUEST;
    }

    if(wb) {
        if (r->result_options & RRDR_RESULT_OPTION_RELATIVE)
            buffer_no_cacheable(wb);
        else if (r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
            buffer_cacheable(wb);
    }

    if(db_after)  *db_after  = r->after;
    if(db_before) *db_before = r->before;

    long i = (!(options & RRDR_OPTION_REVERSED))?rrdr_rows(r) - 1:0;
    *n = rrdr2value(r, i, options, value_is_null);

    rrdr_free(r);
    return HTTP_RESP_OK;
}

int rrdset2anything_api_v1(
          RRDSET *st
        , BUFFER *wb
        , BUFFER *dimensions
        , uint32_t format
        , long points
        , long long after
        , long long before
        , int group_method
        , long group_time
        , uint32_t options
        , time_t *latest_timestamp
) {
    st->last_accessed_time = now_realtime_sec();

    RRDR *r = rrd2rrdr(st, points, after, before, group_method, group_time, options, dimensions?buffer_tostring(dimensions):NULL);
    if(!r) {
        buffer_strcat(wb, "Cannot generate output with these parameters on this chart.");
        return HTTP_RESP_INTERNAL_SERVER_ERROR;
    }

    if(r->result_options & RRDR_RESULT_OPTION_RELATIVE)
        buffer_no_cacheable(wb);
    else if(r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
        buffer_cacheable(wb);

    if(latest_timestamp && rrdr_rows(r) > 0)
        *latest_timestamp = r->before;

    switch(format) {
    case DATASOURCE_SSV:
        if(options & RRDR_OPTION_JSON_WRAP) {
            wb->contenttype = CT_APPLICATION_JSON;
            rrdr_json_wrapper_begin(r, wb, format, options, 1);
            rrdr2ssv(r, wb, options, "", " ", "");
            rrdr_json_wrapper_end(r, wb, format, options, 1);
        }
        else {
            wb->contenttype = CT_TEXT_PLAIN;
            rrdr2ssv(r, wb, options, "", " ", "");
        }
        break;

    case DATASOURCE_SSV_COMMA:
        if(options & RRDR_OPTION_JSON_WRAP) {
            wb->contenttype = CT_APPLICATION_JSON;
            rrdr_json_wrapper_begin(r, wb, format, options, 1);
            rrdr2ssv(r, wb, options, "", ",", "");
            rrdr_json_wrapper_end(r, wb, format, options, 1);
        }
        else {
            wb->contenttype = CT_TEXT_PLAIN;
            rrdr2ssv(r, wb, options, "", ",", "");
        }
        break;

    case DATASOURCE_JS_ARRAY:
        if(options & RRDR_OPTION_JSON_WRAP) {
            wb->contenttype = CT_APPLICATION_JSON;
            rrdr_json_wrapper_begin(r, wb, format, options, 0);
            rrdr2ssv(r, wb, options, "[", ",", "]");
            rrdr_json_wrapper_end(r, wb, format, options, 0);
        }
        else {
            wb->contenttype = CT_APPLICATION_JSON;
            rrdr2ssv(r, wb, options, "[", ",", "]");
        }
        break;

    case DATASOURCE_CSV:
        if(options & RRDR_OPTION_JSON_WRAP) {
            wb->contenttype = CT_APPLICATION_JSON;
            rrdr_json_wrapper_begin(r, wb, format, options, 1);
            rrdr2csv(r, wb, format, options, "", ",", "\\n", "");
            rrdr_json_wrapper_end(r, wb, format, options, 1);
        }
        else {
            wb->contenttype = CT_TEXT_PLAIN;
            rrdr2csv(r, wb, format, options, "", ",", "\r\n", "");
        }
        break;

    case DATASOURCE_CSV_MARKDOWN:
        if(options & RRDR_OPTION_JSON_WRAP) {
            wb->contenttype = CT_APPLICATION_JSON;
            rrdr_json_wrapper_begin(r, wb, format, options, 1);
            rrdr2csv(r, wb, format, options, "", "|", "\\n", "");
            rrdr_json_wrapper_end(r, wb, format, options, 1);
        }
        else {
            wb->contenttype = CT_TEXT_PLAIN;
            rrdr2csv(r, wb, format, options, "", "|", "\r\n", "");
        }
        break;

    case DATASOURCE_CSV_JSON_ARRAY:
        wb->contenttype = CT_APPLICATION_JSON;
        if(options & RRDR_OPTION_JSON_WRAP) {
            rrdr_json_wrapper_begin(r, wb, format, options, 0);
            buffer_strcat(wb, "[\n");
            rrdr2csv(r, wb, format, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n");
            buffer_strcat(wb, "\n]");
            rrdr_json_wrapper_end(r, wb, format, options, 0);
        }
        else {
            wb->contenttype = CT_APPLICATION_JSON;
            buffer_strcat(wb, "[\n");
            rrdr2csv(r, wb, format, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n");
            buffer_strcat(wb, "\n]");
        }
        break;

    case DATASOURCE_TSV:
        if(options & RRDR_OPTION_JSON_WRAP) {
            wb->contenttype = CT_APPLICATION_JSON;
            rrdr_json_wrapper_begin(r, wb, format, options, 1);
            rrdr2csv(r, wb, format, options, "", "\t", "\\n", "");
            rrdr_json_wrapper_end(r, wb, format, options, 1);
        }
        else {
            wb->contenttype = CT_TEXT_PLAIN;
            rrdr2csv(r, wb, format, options, "", "\t", "\r\n", "");
        }
        break;

    case DATASOURCE_HTML:
        if(options & RRDR_OPTION_JSON_WRAP) {
            wb->contenttype = CT_APPLICATION_JSON;
            rrdr_json_wrapper_begin(r, wb, format, options, 1);
            buffer_strcat(wb, "<html>\\n<center>\\n<table border=\\\"0\\\" cellpadding=\\\"5\\\" cellspacing=\\\"5\\\">\\n");
            rrdr2csv(r, wb, format, options, "<tr><td>", "</td><td>", "</td></tr>\\n", "");
            buffer_strcat(wb, "</table>\\n</center>\\n</html>\\n");
            rrdr_json_wrapper_end(r, wb, format, options, 1);
        }
        else {
            wb->contenttype = CT_TEXT_HTML;
            buffer_strcat(wb, "<html>\n<center>\n<table border=\"0\" cellpadding=\"5\" cellspacing=\"5\">\n");
            rrdr2csv(r, wb, format, options, "<tr><td>", "</td><td>", "</td></tr>\n", "");
            buffer_strcat(wb, "</table>\n</center>\n</html>\n");
        }
        break;

    case DATASOURCE_DATATABLE_JSONP:
        wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;

        if(options & RRDR_OPTION_JSON_WRAP)
            rrdr_json_wrapper_begin(r, wb, format, options, 0);

        rrdr2json(r, wb, options, 1);

        if(options & RRDR_OPTION_JSON_WRAP)
            rrdr_json_wrapper_end(r, wb, format, options, 0);
        break;

    case DATASOURCE_DATATABLE_JSON:
        wb->contenttype = CT_APPLICATION_JSON;

        if(options & RRDR_OPTION_JSON_WRAP)
            rrdr_json_wrapper_begin(r, wb, format, options, 0);

        rrdr2json(r, wb, options, 1);

        if(options & RRDR_OPTION_JSON_WRAP)
            rrdr_json_wrapper_end(r, wb, format, options, 0);
        break;

    case DATASOURCE_JSONP:
        wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
        if(options & RRDR_OPTION_JSON_WRAP)
            rrdr_json_wrapper_begin(r, wb, format, options, 0);

        rrdr2json(r, wb, options, 0);

        if(options & RRDR_OPTION_JSON_WRAP)
            rrdr_json_wrapper_end(r, wb, format, options, 0);
        break;

    case DATASOURCE_JSON:
    default:
        wb->contenttype = CT_APPLICATION_JSON;

        if(options & RRDR_OPTION_JSON_WRAP)
            rrdr_json_wrapper_begin(r, wb, format, options, 0);

        rrdr2json(r, wb, options, 0);

        if(options & RRDR_OPTION_JSON_WRAP)
            rrdr_json_wrapper_end(r, wb, format, options, 0);
        break;
    }

    rrdr_free(r);
    return HTTP_RESP_OK;
}