/* @tier medium @module cm @transform common-batch */
/*
 * cm_bt_0014.pgc - 공통 수수료 재계산 배치  [tier=medium]
 *
 * 지정 영업일의 처리완료(status='M') 거래를 커서로 순회하며 거래금액에
 * 가맹점 수수료율(기본 250bp = 2.5%)을 적용해 수수료를 재계산하고,
 * 원장(cm_ledger.fee)을 갱신한다. 재계산 건수/총수수료를 리포트한다.
 * 배치 main 엔트리 포함.
 *
 * 실행:  cm_bt_0014 <YYYYMMDD> [db@host]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "txcore.h"
#include "txcore_dbio.h"
#include "acq_util.h"
#include "cm_core.h"

EXEC SQL INCLUDE sqlca;

#define CM_FEE_BP 250L   /* 기본 수수료율: 250 basis point = 2.5% */

/* 금액 * bp / 10000, 반올림 */
static long calc_fee(long amount, long bp)
{
    long base = amount * bp;
    return (base + 5000L) / 10000L;
}

static int run_cm_bt_0014(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_key[16];
    long h_amount;
    long h_new_fee;
    EXEC SQL END DECLARE SECTION;

    long total = 0, recalc = 0, skipped = 0, errcnt = 0;
    long sum_fee = 0;

    memset(h_biz_date, 0, sizeof(h_biz_date));
    strncpy(h_biz_date, biz_date, sizeof(h_biz_date) - 1);

    EXEC SQL DECLARE cur_cm_bt_0014 CURSOR FOR
        SELECT key, amount
          FROM cm_ledger
         WHERE biz_date = :h_biz_date
           AND status   = 'M'
         ORDER BY key;

    EXEC SQL OPEN cur_cm_bt_0014;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_cm_bt_0014");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[cm_bt_0014] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_cm_bt_0014 INTO :h_key, :h_amount;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_cm_bt_0014");
            errcnt++;
            break;
        }

        total++;

        if (!amount_is_valid(h_amount)) {
            skipped++;
            tx_log(TX_LOG_WARN, "[cm_bt_0014] 금액무효 재계산제외 key=%s", h_key);
            continue;
        }

        h_new_fee = calc_fee(h_amount, CM_FEE_BP);

        EXEC SQL UPDATE cm_ledger
                    SET fee    = :h_new_fee,
                        upd_ts = CURRENT_TIMESTAMP
                  WHERE key = :h_key;

        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("UPDATE cm_ledger fee");
            errcnt++;
            continue;
        }
        recalc++;
        sum_fee += h_new_fee;
    }

    EXEC SQL CLOSE cur_cm_bt_0014;

    if (errcnt == 0)
        tx_commit();
    else
        tx_abort();

    tx_log(TX_LOG_INFO,
           "[cm_bt_0014] 수수료재계산 date=%s 대상=%ld 재계산=%ld 총수수료=%ld",
           biz_date, total, recalc, sum_fee);

    printf("========== 수수료 재계산 [cm_bt_0014] ==========\n");
    printf("  영업일      : %s\n", biz_date);
    printf("  대상(M)     : %ld\n", total);
    printf("  재계산 건수 : %ld\n", recalc);
    printf("  제외 건수   : %ld\n", skipped);
    printf("  총 수수료   : %ld\n", sum_fee);
    printf("  오류 건수   : %ld\n", errcnt);
    printf("=============================================\n");

    return (errcnt == 0) ? TX_OK : TX_FAIL;
}

int main(int argc, char **argv)
{
    const char *biz_date;
    const char *target;
    int rc;

    tx_set_loglevel(TX_LOG_INFO);

    if (argc < 2) {
        fprintf(stderr, "사용법: %s <YYYYMMDD> [db@host]\n", argv[0]);
        return 2;
    }
    biz_date = argv[1];
    target   = (argc >= 3) ? argv[2] : NULL;

    if (!date_is_valid(biz_date)) {
        fprintf(stderr, "오류: 유효하지 않은 영업일 '%s'\n", biz_date);
        return 2;
    }

    tx_log(TX_LOG_INFO, "[cm_bt_0014] 수수료재계산 배치 시작 date=%s", biz_date);

    rc = cm_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[cm_bt_0014] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_cm_bt_0014(biz_date);

    cm_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[cm_bt_0014] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}
