/* @tier hard @module ac @transform acquire-online */
/*
 * ac_ol_0026.pgc - 매입 온라인 서비스 (AC_OL_0026)  [tier=hard]
 *
 * 미매입 재처리: 지정 영업일의 실패건(ac_ledger.status='U')을 커서로
 * 순회하며 금액 유효성을 재검증한다. 유효하면 완료(status='M')로
 * 전이(재처리 성공)하고, 여전히 유효하지 않으면 실패(status='U') 상태를
 * 유지(재처리 보류)한다. 전 건을 하나의 트랜잭션으로 묶어 처리하며,
 * DB 오류 발생 시 전체 롤백한다.
 */
#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_0026, ctx)
{
    /* ---- ECPG 호스트 변수 선언부 ---- */
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_status_fail[2];
    char h_status_done[2];
    char h_key[16];
    long h_amount;
    EXEC SQL END DECLARE SECTION;

    char bizdate[9];
    long reprocessed = 0;
    long failed      = 0;
    long dberr       = 0;

    tx_log(TX_LOG_INFO, "[AC_OL_0026] 미매입 재처리 서비스 진입");

    /* ---- 1. 입력 검증 ---- */
    if (tx_buf_get(ctx->in, "BIZDATE", bizdate, sizeof(bizdate)) != TX_OK ||
        !date_is_valid(bizdate)) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0026] BIZDATE 누락/오류");
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    memset(h_biz_date, 0, sizeof(h_biz_date));
    strncpy(h_biz_date, bizdate, sizeof(h_biz_date) - 1);
    strncpy(h_status_fail, AC_ST_FAIL, sizeof(h_status_fail) - 1);
    h_status_fail[sizeof(h_status_fail) - 1] = '\0';
    strncpy(h_status_done, AC_ST_DONE, sizeof(h_status_done) - 1);
    h_status_done[sizeof(h_status_done) - 1] = '\0';

    /* ---- 2. 트랜잭션 시작 ---- */
    if (tx_begin() != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0026] 트랜잭션 시작 실패");
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    /* ---- 3. 실패건 커서 오픈 ---- */
    EXEC SQL DECLARE cur_ac_ol_0026 CURSOR FOR
        SELECT key, amount
          FROM ac_ledger
         WHERE biz_date = :h_biz_date
           AND status    = :h_status_fail
         ORDER BY key;

    EXEC SQL OPEN cur_ac_ol_0026;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("cur_ac_ol_0026 open");
        tx_abort();
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* ---- 4. 순회 재검증 ---- */
    for (;;) {
        EXEC SQL FETCH cur_ac_ol_0026 INTO :h_key, :h_amount;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("cur_ac_ol_0026 fetch");
            dberr++;
            break;
        }

        if (amount_is_valid(h_amount)) {
            EXEC SQL
                UPDATE ac_ledger
                   SET status = :h_status_done, upd_ts = now()
                 WHERE key = :h_key;

            if (sqlca.sqlcode != TX_SQL_OK) {
                TX_DBIO_LOG_ERR("cur_ac_ol_0026 update done");
                dberr++;
                break;
            }
            reprocessed++;
            tx_log(TX_LOG_DEBUG, "[AC_OL_0026] 재처리성공 key=%s amount=%ld",
                   h_key, h_amount);
        } else {
            /* 여전히 유효하지 않은 금액 -> 실패(U) 상태 유지 */
            failed++;
            tx_log(TX_LOG_DEBUG, "[AC_OL_0026] 재처리보류 key=%s amount=%ld",
                   h_key, h_amount);
        }
    }

    EXEC SQL CLOSE cur_ac_ol_0026;

    /* ---- 5. 커밋/롤백 ---- */
    if (dberr > 0) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0026] DB 오류로 전체 롤백 dberr=%ld", dberr);
        tx_abort();
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    if (tx_commit() != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0026] 커밋 실패");
        tx_abort();
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    /* ---- 6. 응답 구성 ---- */
    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, "REPROCESSED", reprocessed);
    tx_buf_setlong(ctx->out, "FAILED", failed);

    tx_log(TX_LOG_INFO,
           "[AC_OL_0026] 재처리완료 date=%s 성공=%ld 보류=%ld",
           bizdate, reprocessed, failed);
    tx_return(ctx, TX_OK, ctx->out);
}
