/* @tier medium @module ac @transform acquire-online */
/*
 * ac_ol_0002.pgc - 매입 접수 서비스 (AC_OL_0002)  [tier=medium]
 *
 * 가맹점 수수료율(merchant.fee_rate)과 거래한도(limit_amt)를 조회하여
 * 수수료를 산정하고 한도초과/중복키를 반려한 뒤 접수(status='R') 상태로
 * ac_ledger 에 등록한다. 미등록/비활성 가맹점은 반려.
 */
#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_0002, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    char h_merch_id[16];
    long h_fee_rate;
    long h_limit_amt;
    char h_status[2];
    long h_dup;
    EXEC SQL END DECLARE SECTION;

    ac_rec_t rec;
    char key[16], merch[16], card[20], bizdate[16];
    long amount = 0, fee, cnt;
    int  rc;

    tx_log(TX_LOG_INFO, "[AC_OL_0002] 매입 접수 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK ||
        tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK ||
        tx_buf_get(ctx->in, "CARDNO", card, sizeof(card)) != TX_OK ||
        tx_buf_get(ctx->in, "BIZDATE", bizdate, sizeof(bizdate)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0002] 필수 필드 누락");
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    tx_buf_getlong(ctx->in, "AMOUNT", &amount);

    /* 업무검증: 금액 범위 + 영업일 형식 */
    if (!amount_is_valid(amount)) {
        tx_log(TX_LOG_WARN, "[AC_OL_0002] 금액 범위 오류 amount=%ld", amount);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (!date_is_valid(bizdate)) {
        tx_log(TX_LOG_WARN, "[AC_OL_0002] 영업일 오류 date=%s", bizdate);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        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_merch_id, merch, sizeof(h_merch_id) - 1);
    h_merch_id[sizeof(h_merch_id) - 1] = '\0';
    strncpy(h_status, "A", sizeof(h_status));

    EXEC SQL
        SELECT fee_rate, limit_amt INTO :h_fee_rate, :h_limit_amt
          FROM merchant
         WHERE merch_id = :h_merch_id
           AND status   = :h_status;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[AC_OL_0002] 미등록/비활성 가맹점 merch=%s", merch);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_NOMERCH);
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT merchant.fee_rate");
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    if (h_limit_amt > 0 && amount > h_limit_amt) {
        tx_log(TX_LOG_WARN, "[AC_OL_0002] 거래한도 초과 merch=%s amount=%ld limit=%ld",
               merch, amount, h_limit_amt);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    EXEC SQL
        SELECT count(*) INTO :h_dup
          FROM ac_ledger
         WHERE key = :h_key;

    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT dup ac_ledger");
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }
    if (h_dup > 0) {
        tx_log(TX_LOG_WARN, "[AC_OL_0002] 중복 접수키 key=%s", key);
        tx_buf_sets(ctx->out, "RESPCODE", RESP_INVALID);
        tx_return(ctx, TX_FAIL, ctx->out);
        return;
    }

    fee = amount * h_fee_rate / 10000;

    memset(&rec, 0, sizeof(rec));
    strncpy(rec.key, key, sizeof(rec.key) - 1);
    strncpy(rec.merch_id, merch, sizeof(rec.merch_id) - 1);
    strncpy(rec.card_no, card, sizeof(rec.card_no) - 1);
    strncpy(rec.biz_date, bizdate, sizeof(rec.biz_date) - 1);
    strncpy(rec.status, AC_ST_RECV, sizeof(rec.status) - 1);
    rec.amount = amount;
    rec.fee    = fee;

    rc = ac_rec_insert(&rec);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[AC_OL_0002] 등록 실패 rc=%d(%s)", rc, tx_strerror(rc));
        tx_buf_sets(ctx->out, "RESPCODE", RESP_SYSERR);
        tx_return(ctx, rc, ctx->out);
        return;
    }

    cnt = ac_rec_count(bizdate, AC_ST_RECV);

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESPCODE", RESP_OK);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_setlong(ctx->out, "FEE", fee);
    tx_buf_setlong(ctx->out, "DAYCNT", (cnt < 0) ? 0 : cnt);
    tx_log(TX_LOG_INFO, "[AC_OL_0002] 접수완료 key=%s fee=%ld 당일건수=%ld", key, fee, cnt);
    tx_return(ctx, TX_OK, ctx->out);
}
