/* @tier medium @module st @transform settlement-online */
/*
 * st_ol_0009.pgc - 정산 조정(가감) 처리 (ST_OL_0009)  [tier=medium]
 *
 * 확정 정산금에 조정사유코드별 가산/차감 조정을 반영한다.
 * 차감이 정산금을 초과하면 조정 불가로 반려한다. 조정 확정 시
 * 조정이력(st_adjust_hist)에 감사 로그를 적재한다.
 */
#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;


TX_SERVICE(ST_OL_0009, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch[16];
    char h_reason[8];
    long h_base;
    long h_adj;
    long h_result;
    EXEC SQL END DECLARE SECTION;

    char merch[16], reason[8];
    long base = 0, adj = 0, result;
    int  sign;

    tx_log(TX_LOG_INFO, "[ST_OL_0009] 정산 조정 처리 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK) {
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (tx_buf_get(ctx->in, "REASON", reason, sizeof(reason)) != TX_OK)
        strncpy(reason, "MANUAL", sizeof(reason) - 1);
    tx_buf_getlong(ctx->in, "BASE", &base);
    tx_buf_getlong(ctx->in, "ADJ",  &adj);   /* 부호 포함 */

    result = base + adj;
    if (result < 0) {
        tx_log(TX_LOG_WARN, "[ST_OL_0009] 차감 과다 base=%ld adj=%ld", base, adj);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    sign = (adj >= 0) ? 1 : -1;

    /* 조정이력 적재 (트랜잭션 경계) */
    strncpy(h_merch, merch, sizeof(h_merch) - 1);   h_merch[sizeof(h_merch) - 1] = '\0';
    strncpy(h_reason, reason, sizeof(h_reason) - 1); h_reason[sizeof(h_reason) - 1] = '\0';
    h_base   = base;
    h_adj    = adj;
    h_result = result;

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[ST_OL_0009] tx_begin 경고");

    EXEC SQL INSERT INTO st_adjust_hist
            (merch_id, reason_code, base_amt, adj_amt, result_amt, adj_ts)
        VALUES
            (:h_merch, :h_reason, :h_base, :h_adj, :h_result, now());

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("INSERT st_adjust_hist");
        tx_abort();
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    tx_commit();

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "MERCHID", merch);
    tx_buf_sets(ctx->out, "REASON", reason);
    tx_buf_setlong(ctx->out, "BASE", base);
    tx_buf_setlong(ctx->out, "ADJ", adj);
    tx_buf_setlong(ctx->out, "RESULT", result);
    tx_buf_sets(ctx->out, "ADJTYPE", (sign > 0) ? "ADD" : "SUB");
    tx_log(TX_LOG_INFO, "[ST_OL_0009] 조정 base=%ld adj=%ld -> %ld (%s)",
           base, adj, result, reason);
    tx_return(ctx, TX_OK, ctx->out);
}