/* @tier medium @module py @transform payment-batch */
/*
 * py_bt_0008.pgc - 지급 지연이자 산출 배치 (지연건 이자 UPDATE)  [tier=medium]
 *
 * 배치 main 엔트리 포함.  실행:  py_bt_0008 <YYYYMMDD> [db@host]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

static int run_py_bt_0008(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9], h_key[16], h_pdate[9];
    long h_amount, h_interest;
    EXEC SQL END DECLARE SECTION;

    long total = 0, errcnt = 0, intsum = 0;
    long days;

    strncpy(h_biz_date, biz_date, 8); h_biz_date[8] = '\0';

    EXEC SQL DECLARE cur_pyint CURSOR FOR
        SELECT key, amount, biz_date FROM py_ledger
        WHERE status = 'R' AND biz_date < :h_biz_date
        ORDER BY biz_date, key;
    EXEC SQL OPEN cur_pyint;
    if (sqlca.sqlcode != TX_SQL_OK) { TX_DBIO_LOG_ERR("OPEN cur_pyint"); return TX_EDB; }

    if (tx_begin() != TX_OK) tx_log(TX_LOG_WARN, "[py_bt_0008] tx_begin 경고");
    for (;;) {
        EXEC SQL FETCH cur_pyint INTO :h_key, :h_amount, :h_pdate;
        if (sqlca.sqlcode == TX_SQL_NOTFOUND) break;
        if (sqlca.sqlcode != TX_SQL_OK) { errcnt++; break; }
        total++;
        /* 근사 지연일수 = 기준일 - 지급예정일 (YYYYMMDD 정수차 근사) */
        days = atol(biz_date) - atol(h_pdate);
        if (days < 0) days = 0;
        if (days > 60) days = 60;
        h_interest = h_amount * 2 * days / 10000;   /* 일 0.02% */
        intsum += h_interest;
        EXEC SQL UPDATE py_ledger SET fee = :h_interest, upd_ts = now() WHERE key = :h_key;
        if (sqlca.sqlcode != TX_SQL_OK) errcnt++;
    }
    EXEC SQL CLOSE cur_pyint;
    if (errcnt == 0) tx_commit(); else tx_abort();

    printf("===== 지급 지연이자 산출 [py_bt_0008] 대상=%ld 이자합=%ld 오류=%ld =====\n",
           total, intsum, errcnt);
    tx_log(TX_LOG_INFO, "[py_bt_0008] 지연이자 date=%s intsum=%ld", biz_date, intsum);
    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, "[py_bt_0008] 배치 시작 date=%s", biz_date);
    rc = py_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[py_bt_0008] DB 접속 실패 rc=%d", rc);
        return 1;
    }
    rc = run_py_bt_0008(biz_date);
    py_dbio_disconnect();
    tx_log(TX_LOG_INFO, "[py_bt_0008] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}