/* @tier easy @module ac @transform acquire-online */
/*
 * ac_ol_0021.pgc - 매입 온라인 서비스 (AC_OL_0021)  [tier=easy]
 *
 * 매입 승인번호 매핑: 카드사 승인내역 존재를 확인한 뒤 매입 원장에
 * 승인번호를 매핑한다.
 */
#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_0021, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    char h_approval_no[16];
    int  h_cnt;
    int  h_ledger_cnt;
    EXEC SQL END DECLARE SECTION;

    char key[16], apprno[16];

    tx_log(TX_LOG_INFO, "[AC_OL_0021] 매입 승인번호 매핑 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK ||
        tx_buf_get(ctx->in, "APPROVALNO", apprno, sizeof(apprno)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0021] 필수 필드(KEY/APPROVALNO) 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (key[0] == '\0' || apprno[0] == '\0') {
        tx_log(TX_LOG_ERROR, "[AC_OL_0021] KEY/APPROVALNO 빈 값");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

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

    /* 매입 원장 존재 확인 (선행 검증) */
    EXEC SQL SELECT count(*)
        INTO :h_ledger_cnt
        FROM ac_ledger
        WHERE key = :h_key;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT count ac_ledger");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (h_ledger_cnt <= 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0021] 매입 원장 없음 key=%s", key);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_buf_setlong(ctx->out, "MAPPED", 0L);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    /* 카드사 승인내역 존재 확인 */
    EXEC SQL SELECT count(*)
        INTO :h_cnt
        FROM approval
        WHERE approval_no = :h_approval_no;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT count approval");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    if (h_cnt <= 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0021] 승인내역 없음 approvalno=%s", apprno);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_buf_setlong(ctx->out, "MAPPED", 0L);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    if (tx_begin() != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0021] 트랜잭션 시작 실패");
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    EXEC SQL UPDATE ac_ledger
        SET approval_no = :h_approval_no
        WHERE key = :h_key;

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("UPDATE ac_ledger approval_no");
        tx_abort();
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (sqlca.sqlerrd[2] == 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0021] 매핑대상 원장 없음 key=%s", key);
        tx_abort();
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }

    tx_commit();

    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, "APPROVALNO", apprno);
    tx_buf_setlong(ctx->out, "MAPPED", 1L);

    tx_log(TX_LOG_INFO, "[AC_OL_0021] 완료 key=%s approvalno=%s", key, apprno);
    tx_return(ctx, TX_OK, ctx->out);
}