/* @tier easy @module st @transform settlement-online */
/*
 * st_ol_0025.pgc - 정산 원장연계 기표 (ST_OL_0025)  [tier=easy]
 *
 * 정산 확정건을 회계원장에 연계 기표한다. 차변 미지급금 / 대변 수수료수익
 * + 부가세예수금 으로 분개하여 대차 균형을 검증하고, 회계전표
 * (st_gl_journal)에 차/대변 분개행을 기표한다.
 */
#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;


static long st_fee_round(long amount, long rate_bp)
{
    /* 요율(만분율, basis point) x 금액 -> 원단위 반올림 (BigDecimal HALF_UP 대응) */
    if (amount < 0)
        return -(((-amount) * rate_bp + 5000) / 10000);
    return (amount * rate_bp + 5000) / 10000;
}

TX_SERVICE(ST_OL_0025, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_merch[16];
    char h_acct[12];
    char h_drcr[2];
    long h_amt;
    EXEC SQL END DECLARE SECTION;

    char merch[16];
    long net = 0, fee = 0, vat, dr, cr;

    tx_log(TX_LOG_INFO, "[ST_OL_0025] 정산 원장연계 기표 진입");

    if (tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK) {
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    tx_buf_getlong(ctx->in, "NET", &net);
    tx_buf_getlong(ctx->in, "FEE", &fee);
    if (net < 0 || fee < 0) {
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    vat = st_fee_round(fee, 1000);      /* 수수료수익의 부가세 10% */
    dr  = net + fee + vat;              /* 차변: 미지급금(정산부채) */
    cr  = net + fee + vat;              /* 대변: 예수금 + 수수료수익 + VAT예수금 */

    /* 회계전표 분개 기표 (대차 균형일 때만) */
    if (dr != cr) {
        tx_log(TX_LOG_ERROR, "[ST_OL_0025] 대차 불균형 dr=%ld cr=%ld", dr, cr);
        tx_buf_reset(ctx->out);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_buf_sets(ctx->out, "BALANCED", "N");
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    strncpy(h_merch, merch, sizeof(h_merch) - 1);
    h_merch[sizeof(h_merch) - 1] = '\0';

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[ST_OL_0025] tx_begin 경고");

    /* 차변: 미지급금 */
    strncpy(h_acct, "PAYABLE", sizeof(h_acct) - 1); h_acct[sizeof(h_acct) - 1] = '\0';
    strncpy(h_drcr, "D", sizeof(h_drcr) - 1);       h_drcr[sizeof(h_drcr) - 1] = '\0';
    h_amt = dr;
    EXEC SQL INSERT INTO st_gl_journal
            (merch_id, acct_code, dr_cr, amount, book_ts)
        VALUES
            (:h_merch, :h_acct, :h_drcr, :h_amt, now());
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("INSERT st_gl_journal 차변");
        tx_abort();
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 대변: 수수료수익 */
    strncpy(h_acct, "FEEREV", sizeof(h_acct) - 1); h_acct[sizeof(h_acct) - 1] = '\0';
    strncpy(h_drcr, "C", sizeof(h_drcr) - 1);      h_drcr[sizeof(h_drcr) - 1] = '\0';
    h_amt = cr;
    EXEC SQL INSERT INTO st_gl_journal
            (merch_id, acct_code, dr_cr, amount, book_ts)
        VALUES
            (:h_merch, :h_acct, :h_drcr, :h_amt, now());
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("INSERT st_gl_journal 대변");
        tx_abort();
        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_setlong(ctx->out, "DRAMT", dr);
    tx_buf_setlong(ctx->out, "CRAMT", cr);
    tx_buf_setlong(ctx->out, "FEEREV", fee);
    tx_buf_setlong(ctx->out, "VATPAYABLE", vat);
    tx_buf_sets(ctx->out, "BALANCED", "Y");
    tx_log(TX_LOG_INFO, "[ST_OL_0025] 기표 merch=%s 차변=%ld 대변=%ld 균형=Y",
           merch, dr, cr);
    tx_return(ctx, TX_OK, ctx->out);
}