/* @tier hard @module st @transform settlement-online */
/*
 * st_ol_0015.pgc - 영업일 지급일(T+n) 산정 (ST_OL_0015)  [tier=hard]
 *
 * 거래 영업일 기준 T+n 영업일 지급일을 산정한다. 주말/비영업일을
 * 건너뛰며 date_next_business 로 n 영업일을 전진시키되, 지정공휴일
 * 달력(st_holiday)에 등록된 날짜는 추가로 건너뛴다.
 */
#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;


static int st_is_holiday(const char *ymd)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_ymd[9];
    long h_cnt;
    EXEC SQL END DECLARE SECTION;

    strncpy(h_ymd, ymd, sizeof(h_ymd) - 1);
    h_ymd[sizeof(h_ymd) - 1] = '\0';
    h_cnt = 0;

    EXEC SQL SELECT count(*)
        INTO :h_cnt
        FROM st_holiday
        WHERE holiday = :h_ymd;

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT st_holiday");
        return 0;
    }
    return (h_cnt > 0) ? 1 : 0;
}

TX_SERVICE(ST_OL_0015, ctx)
{
    char bizdate[16], cur[9], nxt[9];
    long nplus = 0, i, skipped = 0;

    tx_log(TX_LOG_INFO, "[ST_OL_0015] 지급일 T+n 산정 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;
    }
    tx_buf_getlong(ctx->in, "NPLUS", &nplus);
    if (nplus < 0 || nplus > 30) nplus = 2;   /* 기본 T+2 */

    memset(cur, 0, sizeof(cur));
    strncpy(cur, bizdate, sizeof(cur) - 1);
    for (i = 0; i < nplus; i++) {
        if (date_next_business(cur, nxt) != 0) {
            tx_log(TX_LOG_ERROR, "[ST_OL_0015] 다음영업일 계산 실패 cur=%s", cur);
            tx_return(ctx, TX_FAIL, ctx->out);
            return;
        }
        strncpy(cur, nxt, sizeof(cur) - 1);
        /* 지정공휴일이면 추가 전진 */
        while (st_is_holiday(cur)) {
            skipped++;
            if (date_next_business(cur, nxt) != 0)
                break;
            strncpy(cur, nxt, sizeof(cur) - 1);
        }
    }

    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, "NPLUS", nplus);
    tx_buf_setlong(ctx->out, "HOLIDAYSKIP", skipped);
    tx_buf_sets(ctx->out, "PAYDATE", cur);
    tx_log(TX_LOG_INFO, "[ST_OL_0015] T+%ld 지급일 %s -> %s (공휴일 %ld회 건너뜀)",
           nplus, bizdate, cur, skipped);
    tx_return(ctx, TX_OK, ctx->out);
}