/* @tier easy @module vl @transform validation-online */
/*
 * vl_ol_0021.pgc - 매입-정산 대사 서비스 (VL_OL_0021)  [tier=easy]
 *
 * 영업일 기준 매입합계(SUM vl_purchase) 와 정산합계(SUM vl_settle) 를
 * 조회하여 차액을 산출하고 정합/불일치를 판정한다.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(VL_OL_0021, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_bizdate[9];
    long h_purch_sum;
    long h_settle_sum;
    EXEC SQL END DECLARE SECTION;

    char bizdate[16];
    long diff;

    tx_log(TX_LOG_INFO, "[VL_OL_0021] 매입-정산 대사 서비스 진입");

    if (tx_buf_get(ctx->in, "BIZDATE", bizdate, sizeof(bizdate)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0021] 영업일(BIZDATE) 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2100");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (!date_is_valid(bizdate)) {
        tx_log(TX_LOG_WARN, "[VL_OL_0021] 영업일 형식 오류 date=%s", bizdate);
        tx_buf_sets(ctx->out, "ERRCODE", "VL2101");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

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

    h_purch_sum = 0;
    EXEC SQL
        SELECT COALESCE(SUM(amount), 0)
          INTO :h_purch_sum
          FROM vl_purchase
         WHERE biz_date = :h_bizdate;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT SUM vl_purchase");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2108");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    h_settle_sum = 0;
    EXEC SQL
        SELECT COALESCE(SUM(settle_amt), 0)
          INTO :h_settle_sum
          FROM vl_settle
         WHERE biz_date = :h_bizdate;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT SUM vl_settle");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2109");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    diff = h_purch_sum - h_settle_sum;

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "BIZDATE", bizdate);
    tx_buf_setlong(ctx->out, "PURCHSUM", h_purch_sum);
    tx_buf_setlong(ctx->out, "SETTLESUM", h_settle_sum);
    tx_buf_setlong(ctx->out, "DIFF", diff);

    if (diff != 0) {
        tx_log(TX_LOG_WARN, "[VL_OL_0021] 매입-정산 불일치 date=%s diff=%ld",
               bizdate, diff);
        tx_buf_sets(ctx->out, "RESULT", "MISMATCH");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2102");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }

    tx_buf_sets(ctx->out, "RESULT", "MATCH");
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[VL_OL_0021] 매입-정산 정합 date=%s sum=%ld",
           bizdate, h_purch_sum);
    tx_return(ctx, TX_OK, ctx->out);
}
