/* @tier easy @module ac @transform acquire-batch */
/*
 * ac_bt_0012.pgc - 매입 원천징수 배치  [tier=easy]
 *
 * 지정 영업일에 처리완료(status='M') 된 매입행을 가맹점(merchant) 과
 * 조인하여 가맹점별 원천징수율을 적용, 원천징수액을 계산해 원장에
 * 반영한다. 배치 main 엔트리 포함.
 *
 * 실행:  ac_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 "ac_core.h"

EXEC SQL INCLUDE sqlca;

static int run_ac_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_withhold_rate;
    long h_withhold;
    EXEC SQL END DECLARE SECTION;

    long total = 0, errcnt = 0;
    long withhold_sum = 0;
    char wonbuf[64];

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

    EXEC SQL DECLARE cur_ac_bt_0012 CURSOR FOR
        SELECT l.key, l.amount, m.withhold_rate
        FROM ac_ledger l
        JOIN merchant m ON m.merch_id = l.merch_id
        WHERE l.biz_date = :h_biz_date
          AND l.status   = 'M'
        ORDER BY l.key;

    EXEC SQL OPEN cur_ac_bt_0012;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_ac_bt_0012");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[ac_bt_0012] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_ac_bt_0012 INTO :h_key, :h_amount, :h_withhold_rate;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_ac_bt_0012");
            errcnt++;
            break;
        }

        total++;

        /* withhold_rate 는 만분율(1/10000) 단위 */
        h_withhold = (h_amount * h_withhold_rate) / 10000;

        EXEC SQL UPDATE ac_ledger
            SET withhold_amt = :h_withhold
            WHERE key = :h_key;

        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("UPDATE ac_bt_0012 withhold_amt");
            tx_log(TX_LOG_ERROR, "[ac_bt_0012] 원천징수 반영 실패 key=%s", h_key);
            errcnt++;
            continue;
        }

        withhold_sum += h_withhold;
    }

    EXEC SQL CLOSE cur_ac_bt_0012;

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

    amount_format_won(withhold_sum, wonbuf, sizeof(wonbuf));

    tx_log(TX_LOG_INFO,
           "[ac_bt_0012] 요약 date=%s 대상=%ld 원천징수합계=%ld 오류=%ld",
           biz_date, total, withhold_sum, errcnt);

    printf("========== 매입 원천징수 결과 [ac_bt_0012] ==========\n");
    printf("  영업일          : %s\n", biz_date);
    printf("  대상 건수       : %ld\n", total);
    printf("  원천징수 합계   : %ld (%s)\n", withhold_sum, wonbuf);
    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, "[ac_bt_0012] 배치 시작 date=%s", biz_date);

    rc = ac_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[ac_bt_0012] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_ac_bt_0012(biz_date);

    ac_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[ac_bt_0012] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}