/* @tier hard @module st @transform settlement-batch */
/*
 * st_bt_0013.pgc - 정산 수수료 재계산 배치  [tier=hard]
 *
 * 접수/완료 건을 커서로 순회하며 표준요율(1.80%)로 수수료를 재계산하고,
 * 기존 값과 다른 건만 원장을 갱신하며 총 변동분(delta)을 집계한다.
 *
 * 실행:  st_bt_0013 <YYYYMMDD> [db@host]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;


static int run_st_bt_0013(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_key[16];
    long h_amount;
    long h_fee;
    long h_newfee;
    EXEC SQL END DECLARE SECTION;

    const long std_bp = 180;
    long total = 0, changed = 0, delta_sum = 0, errcnt = 0;

    strncpy(h_biz_date, biz_date, sizeof(h_biz_date) - 1);
    h_biz_date[sizeof(h_biz_date) - 1] = '\0';

    EXEC SQL DECLARE cur_st_bt_0013 CURSOR FOR
        SELECT key, amount, fee
        FROM st_ledger
        WHERE biz_date = :h_biz_date
          AND status IN ('R', 'M')
        ORDER BY key;

    EXEC SQL OPEN cur_st_bt_0013;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_st_bt_0013");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[st_bt_0013] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_st_bt_0013 INTO :h_key, :h_amount, :h_fee;
        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_st_bt_0013");
            errcnt++;
            break;
        }
        total++;
        h_newfee = (h_amount * std_bp + 5000) / 10000;
        if (h_newfee == h_fee)
            continue;

        EXEC SQL UPDATE st_ledger
                 SET fee = :h_newfee, upd_ts = now()
                 WHERE key = :h_key;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("UPDATE recalc st_bt_0013");
            errcnt++;
        } else {
            changed++;
            delta_sum += (h_newfee - h_fee);
        }
    }

    EXEC SQL CLOSE cur_st_bt_0013;
    if (errcnt == 0) tx_commit(); else tx_abort();

    printf("========== 정산 수수료 재계산 [st_bt_0013] ==========\n");
    printf("  영업일      : %s\n", biz_date);
    printf("  대상 건수   : %ld\n", total);
    printf("  갱신 건수   : %ld\n", changed);
    printf("  수수료 변동 : %ld\n", delta_sum);
    printf("  오류 건수   : %ld\n", errcnt);
    printf("=============================================\n");

    tx_log(TX_LOG_INFO, "[st_bt_0013] 재계산 date=%s 갱신=%ld 변동=%ld",
           biz_date, changed, delta_sum);
    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, "[st_bt_0013] 배치 시작 date=%s", biz_date);

    rc = st_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[st_bt_0013] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_st_bt_0013(biz_date);

    st_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[st_bt_0013] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}
