/* @tier medium @module st @transform settlement-online */
/*
 * st_ol_0022.pgc - 정산 통계 조회 (ST_OL_0022)  [tier=medium]
 *
 * 지정 영업일의 정산 통계를 산출한다. 총건수/정산완료건수 기반
 * 정산완료율(bp) 과 건당 평균 거래금액을 계산한다. 통계는 단일
 * 임베디드 집계 SQL(st_ledger)로 산출한다.
 */
#include <stdio.h>
#include <string.h>

#include "txcore.h"
#include "txcore_dbio.h"
#include "acq_util.h"
#include "st_core.h"

EXEC SQL INCLUDE sqlca;


TX_SERVICE(ST_OL_0022, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_bizdate[9];
    long h_total;
    long h_settled;
    long h_sum;
    EXEC SQL END DECLARE SECTION;

    char bizdate[16];
    long total = 0, settled = 0, sum = 0, rate_bp = 0, avg = 0;

    tx_log(TX_LOG_INFO, "[ST_OL_0022] 정산 통계 조회 진입");

    if (tx_buf_get(ctx->in, "BIZDATE", bizdate, sizeof(bizdate)) != TX_OK ||
        !date_is_valid(bizdate)) {
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    strncpy(h_bizdate, bizdate, sizeof(h_bizdate) - 1);
    h_bizdate[sizeof(h_bizdate) - 1] = '\0';
    h_total = h_settled = h_sum = 0;

    EXEC SQL SELECT
            count(*),
            count(*) filter (where status = 'S'),
            coalesce(sum(amount), 0)
        INTO :h_total, :h_settled, :h_sum
        FROM st_ledger
        WHERE biz_date = :h_bizdate;

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT 정산통계");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    total   = h_total;
    settled = h_settled;
    sum     = h_sum;

    if (total > 0) {
        rate_bp = settled * 10000 / total;
        avg     = sum / total;
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "BIZDATE", bizdate);
    tx_buf_setlong(ctx->out, "TOTALCNT", total);
    tx_buf_setlong(ctx->out, "SETTLEDCNT", settled);
    tx_buf_setlong(ctx->out, "SETTLERATEBP", rate_bp);
    tx_buf_setlong(ctx->out, "AVGAMT", avg);
    tx_log(TX_LOG_INFO, "[ST_OL_0022] 통계 date=%s 총=%ld 정산율bp=%ld 평균=%ld",
           bizdate, total, rate_bp, avg);
    tx_return(ctx, TX_OK, ctx->out);
}