/* @tier easy @module st @transform settlement-batch */
/*
 * st_bt_0012.pgc - 정산 diff 검증 배치  [tier=easy]
 *
 * 원장에 기록된 실제 수수료와 표준요율(1.80%) 재산출 수수료를 커서로
 * 대조하여 불일치 건을 검출/집계한다.
 *
 * 실행:  st_bt_0012 <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_0012(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_key[16];
    long h_amount;
    long h_fee;
    EXEC SQL END DECLARE SECTION;

    const long std_bp = 180;
    long total = 0, mismatch = 0, diff_abs_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_0012 CURSOR FOR
        SELECT key, amount, fee
        FROM st_ledger
        WHERE biz_date = :h_biz_date
        ORDER BY key;

    EXEC SQL OPEN cur_st_bt_0012;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_st_bt_0012");
        return TX_EDB;
    }

    for (;;) {
        EXEC SQL FETCH cur_st_bt_0012 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_0012");
            errcnt++;
            break;
        }
        total++;
        long expected = (h_amount * std_bp + 5000) / 10000;
        long diff = h_fee - expected;
        if (diff != 0) {
            mismatch++;
            diff_abs_sum += (diff < 0) ? -diff : diff;
            tx_log(TX_LOG_WARN, "[st_bt_0012] 불일치 key=%s 실제=%ld 예상=%ld",
                   h_key, h_fee, expected);
        }
    }

    EXEC SQL CLOSE cur_st_bt_0012;

    printf("========== 정산 diff 검증 [st_bt_0012] ==========\n");
    printf("  영업일      : %s\n", biz_date);
    printf("  검증 건수   : %ld\n", total);
    printf("  불일치 건수 : %ld\n", mismatch);
    printf("  차이 절대합 : %ld\n", diff_abs_sum);
    printf("=============================================\n");

    tx_log(TX_LOG_INFO, "[st_bt_0012] diff검증 date=%s 검증=%ld 불일치=%ld",
           biz_date, total, mismatch);
    return (errcnt == 0 && mismatch == 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_0012] 배치 시작 date=%s", biz_date);

    rc = st_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[st_bt_0012] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_st_bt_0012(biz_date);

    st_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[st_bt_0012] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}