/* @tier easy @module ac @transform acquire-online */
/*
 * ac_ol_0005.pgc - 매입 취소 서비스 (AC_OL_0005)  [tier=easy]
 *
 * 처리키(KEY)로 현재 상태를 조회하여 이미 정산완료(S)/이미 취소(U)된
 * 건은 반려하고, 그 외는 취소(status='U')로 전이시킨다. 취소 사유코드는
 * 로그로 남기고, 처리 후 당일 취소건수를 함께 안내한다.
 */
#include <stdio.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

TX_SERVICE(AC_OL_0005, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    char h_status[2];
    long h_amount;
    char h_biz_date[9];
    char h_cancel_status[2];
    EXEC SQL END DECLARE SECTION;

    char key[16];
    char reason[32];
    long cancel_cnt;

    tx_log(TX_LOG_INFO, "[AC_OL_0005] 매입 취소 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0005] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (tx_buf_get(ctx->in, "REASON", reason, sizeof(reason)) != TX_OK ||
        reason[0] == '\0') {
        strncpy(reason, "미상", sizeof(reason) - 1);
        reason[sizeof(reason) - 1] = '\0';
        tx_log(TX_LOG_DEBUG, "[AC_OL_0005] 취소사유 미지정 key=%s 기본값 적용", key);
    }

    strncpy(h_key, key, sizeof(h_key) - 1);
    h_key[sizeof(h_key) - 1] = '\0';

    EXEC SQL SELECT status, amount, biz_date
          INTO :h_status, :h_amount, :h_biz_date
          FROM ac_ledger
         WHERE key = :h_key;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0005] 대상 없음 key=%s", key);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT status ac_ledger");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    if (strcmp(h_status, AC_ST_SETTLED) == 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0005] 이미 정산완료 취소불가 key=%s", key);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "KEY", key);
        tx_buf_sets(ctx->out, "CANCELLED", "N");
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }
    if (strcmp(h_status, AC_ST_FAIL) == 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0005] 이미 취소된 건 key=%s", key);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "KEY", key);
        tx_buf_sets(ctx->out, "CANCELLED", "N");
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    strncpy(h_cancel_status, AC_ST_FAIL, sizeof(h_cancel_status));

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[AC_OL_0005] tx_begin 경고");

    EXEC SQL UPDATE ac_ledger
           SET status = :h_cancel_status,
               upd_ts = now()
         WHERE key = :h_key;

    if (sqlca.sqlcode != TX_SQL_OK || sqlca.sqlerrd[2] != 1) {
        TX_DBIO_LOG_ERR("UPDATE ac_ledger(취소)");
        tx_abort();
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_commit();

    /* 참고정보: 당일 취소건수 (표준 DBIO 재사용) */
    cancel_cnt = ac_rec_count(h_biz_date, AC_ST_FAIL);
    if (cancel_cnt < 0)
        cancel_cnt = 0;

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_sets(ctx->out, "STATUS", h_cancel_status);
    tx_buf_setlong(ctx->out, "AMOUNT", h_amount);
    tx_buf_sets(ctx->out, "CANCELLED", "Y");
    tx_buf_sets(ctx->out, "REASON", reason);
    tx_buf_setlong(ctx->out, "DAYCANCELCNT", cancel_cnt);
    tx_log(TX_LOG_INFO,
           "[AC_OL_0005] 매입 취소완료 key=%s 이전상태=%s 사유=%s 당일취소건수=%ld",
           key, h_status, reason, cancel_cnt);
    tx_return(ctx, TX_OK, ctx->out);
}