/* @tier easy @module ac @transform acquire-online */
/*
 * ac_ol_0032.pgc - 매입 온라인 서비스 (AC_OL_0032)  [tier=easy]
 *
 * 매입 재승인 매핑: 기존 매입 원장 건에 새로운 승인번호(NEWAPPROVALNO)를
 * 매핑한다. 신규 승인번호가 정상승인(approval.appr_status='A') 상태일
 * 때만 ac_ledger.approval_no 를 갱신하고 완료(status='M') 로 전이한다.
 */
#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_0032, ctx)
{
    /* ---- ECPG 호스트 변수 선언부 ---- */
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    char h_new_appr[16];
    char h_appr_status_ok[2];
    long h_appr_amount;
    char h_status_done[2];
    EXEC SQL END DECLARE SECTION;

    char key[16], newappr[16];
    long remapped = 0;

    tx_log(TX_LOG_INFO, "[AC_OL_0032] 매입 재승인 매핑 서비스 진입");

    /* ---- 1. 입력 검증 ---- */
    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK ||
        tx_buf_get(ctx->in, "NEWAPPROVALNO", newappr, sizeof(newappr)) != TX_OK ||
        newappr[0] == '\0') {
        tx_log(TX_LOG_ERROR, "[AC_OL_0032] 필수 필드 누락");
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    memset(h_key, 0, sizeof(h_key));
    strncpy(h_key, key, sizeof(h_key) - 1);
    memset(h_new_appr, 0, sizeof(h_new_appr));
    strncpy(h_new_appr, newappr, sizeof(h_new_appr) - 1);
    strncpy(h_appr_status_ok, "A", sizeof(h_appr_status_ok));
    strncpy(h_status_done, AC_ST_DONE, sizeof(h_status_done) - 1);
    h_status_done[sizeof(h_status_done) - 1] = '\0';

    /* ---- 2. 신규 승인번호 유효성 확인 (정상승인 건만 매핑 허용) ---- */
    EXEC SQL SELECT amount
          INTO :h_appr_amount
          FROM approval
         WHERE approval_no = :h_new_appr
           AND appr_status = :h_appr_status_ok;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0032] 유효승인 아님 new_appr=%s", newappr);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT approval");
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* ---- 3. 매입 원장에 재승인번호 매핑 ---- */
    if (tx_begin() != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0032] 트랜잭션 시작 실패");
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

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

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("UPDATE ac_ledger approval_no");
        tx_abort();
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (sqlca.sqlerrd[2] == 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0032] 대상건 없음 key=%s", key);
        tx_abort();
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    remapped = 1;

    if (tx_commit() != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0032] 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;
    }

    /* ---- 4. 응답 구성 ---- */
    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_sets(ctx->out, "NEWAPPROVALNO", newappr);
    tx_buf_setlong(ctx->out, "REMAPPED", remapped);
    tx_buf_setlong(ctx->out, "AMOUNT", h_appr_amount);

    tx_log(TX_LOG_INFO,
           "[AC_OL_0032] 재승인매핑완료 key=%s new_appr=%s amount=%ld",
           key, newappr, h_appr_amount);
    tx_return(ctx, TX_OK, ctx->out);
}