/* @tier hard @module ac @transform acquire-online */
/*
 * ac_ol_0006.pgc - 매입 정정 서비스 (AC_OL_0006)  [tier=hard]
 *
 * 원거래 금액/수수료를 조회하고 가맹점 수수료율로 신규 수수료를 재산정한
 * 뒤 ac_ledger 원장을 정정(UPDATE)하고, 정정 이력행(acq_type='CORR',
 * orig_key 연결)을 별도로 적재한다. 전 과정을 하나의 트랜잭션으로 처리.
 */
#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_0006, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    long h_old_amount;
    long h_old_fee;
    char h_merch_id[16];
    char h_card_no[20];
    char h_biz_date[9];
    long h_new_amount;
    long h_new_fee;
    long h_fee_rate;
    char h_corr_key[16];
    char h_status[2];
    EXEC SQL END DECLARE SECTION;

    char key[16];
    long new_amount = 0;
    size_t klen;

    tx_log(TX_LOG_INFO, "[AC_OL_0006] 매입 정정 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0006] KEY 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (tx_buf_getlong(ctx->in, "NEWAMOUNT", &new_amount) != TX_OK ||
        !amount_is_valid(new_amount)) {
        tx_log(TX_LOG_WARN, "[AC_OL_0006] 정정금액 오류 amount=%ld", new_amount);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

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

    if (tx_begin() != TX_OK) {
        tx_log(TX_LOG_WARN, "[AC_OL_0006] tx_begin 경고");
    }

    EXEC SQL
        SELECT amount, fee, merch_id, card_no, biz_date
          INTO :h_old_amount, :h_old_fee, :h_merch_id, :h_card_no, :h_biz_date
          FROM ac_ledger
         WHERE key = :h_key;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0006] 원거래 없음 key=%s", key);
        tx_abort();
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT ac_ledger(정정대상)");
        tx_abort();
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    EXEC SQL
        SELECT fee_rate INTO :h_fee_rate
          FROM merchant
         WHERE merch_id = :h_merch_id;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0006] 가맹점 없음 merch=%s", h_merch_id);
        tx_abort();
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT merchant.fee_rate(정정)");
        tx_abort();
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    h_new_fee = h_new_amount * h_fee_rate / 10000;

    EXEC SQL
        UPDATE ac_ledger
           SET amount = :h_new_amount,
               fee    = :h_new_fee,
               upd_ts = now()
         WHERE key = :h_key;

    if (sqlca.sqlcode != TX_SQL_OK || sqlca.sqlerrd[2] != 1) {
        TX_DBIO_LOG_ERR("UPDATE ac_ledger(정정)");
        tx_abort();
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 정정 이력키 = 원키 앞부분 13자 + "-C" (16바이트 한도 준수) */
    klen = strlen(h_key);
    if (klen > 13)
        klen = 13;
    memcpy(h_corr_key, h_key, klen);
    h_corr_key[klen] = '\0';
    strcat(h_corr_key, "-C");
    strncpy(h_status, AC_ST_DONE, sizeof(h_status));

    EXEC SQL
        INSERT INTO ac_ledger
            (key, merch_id, card_no, amount, biz_date, status, fee,
             acq_type, orig_key)
        VALUES
            (:h_corr_key, :h_merch_id, :h_card_no, :h_new_amount, :h_biz_date,
             :h_status, :h_new_fee, 'CORR', :h_key);

    if (sqlca.sqlcode != TX_SQL_OK || sqlca.sqlerrd[2] != 1) {
        TX_DBIO_LOG_ERR("INSERT ac_ledger(정정이력)");
        tx_abort();
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_commit();

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_setlong(ctx->out, "OLDAMOUNT", h_old_amount);
    tx_buf_setlong(ctx->out, "NEWAMOUNT", h_new_amount);
    tx_buf_setlong(ctx->out, "OLDFEE", h_old_fee);
    tx_buf_setlong(ctx->out, "NEWFEE", h_new_fee);
    tx_log(TX_LOG_INFO,
           "[AC_OL_0006] 정정완료 key=%s 구금액=%ld 신금액=%ld 구수수료=%ld 신수수료=%ld",
           key, h_old_amount, h_new_amount, h_old_fee, h_new_fee);
    tx_return(ctx, TX_OK, ctx->out);
}