/* @tier medium @module lg @transform ledger-batch */
/*
 * lg_bt_0005.pgc - 계정별(가맹점별) 집계 배치  [tier=medium]
 *
 * 지정 영업일 원장을 가맹점(merch_id) 기준으로 GROUP BY 집계하여
 * 가맹점별 건수/거래금액 합계 리포트를 출력한다. 커서로 그룹 결과를
 * 순회하며 총계를 함께 산출한다.
 *
 * 실행:  lg_bt_0005 <YYYYMMDD> [db@host]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

static int run_lg_bt_0005(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_merch_id[16];
    long h_cnt;
    long h_sum;
    EXEC SQL END DECLARE SECTION;

    long groups = 0, grand_cnt = 0, grand_sum = 0, errcnt = 0;
    char won[32];

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

    EXEC SQL DECLARE cur_lg_bt_0005 CURSOR FOR
        SELECT merch_id, count(*), coalesce(sum(amount), 0)
        FROM lg_ledger
        WHERE biz_date = :h_biz_date
        GROUP BY merch_id
        ORDER BY merch_id;

    EXEC SQL OPEN cur_lg_bt_0005;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_lg_bt_0005");
        return TX_EDB;
    }

    printf("========== 계정별 집계 결과 [lg_bt_0005] ==========\n");
    printf("  영업일 : %s\n", biz_date);
    printf("  --------------------------------------------\n");
    printf("  %-16s %8s %18s\n", "가맹점", "건수", "거래금액");
    printf("  --------------------------------------------\n");

    for (;;) {
        EXEC SQL FETCH cur_lg_bt_0005 INTO :h_merch_id, :h_cnt, :h_sum;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_lg_bt_0005");
            errcnt++;
            break;
        }

        groups++;
        grand_cnt += h_cnt;
        grand_sum += h_sum;

        amount_format_won(h_sum, won, sizeof(won));
        printf("  %-16s %8ld %18s\n", h_merch_id, h_cnt, won);
    }

    EXEC SQL CLOSE cur_lg_bt_0005;

    amount_format_won(grand_sum, won, sizeof(won));
    printf("  --------------------------------------------\n");
    printf("  가맹점 수   : %ld\n", groups);
    printf("  총 건수     : %ld\n", grand_cnt);
    printf("  총 거래금액 : %s\n", won);
    printf("  오류 건수   : %ld\n", errcnt);
    printf("=================================================\n");

    tx_log(TX_LOG_INFO,
           "[lg_bt_0005] 요약 date=%s 가맹점=%ld 건수=%ld 금액=%ld 오류=%ld",
           biz_date, groups, grand_cnt, grand_sum, errcnt);

    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, "[lg_bt_0005] 배치 시작 date=%s", biz_date);

    rc = lg_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[lg_bt_0005] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_lg_bt_0005(biz_date);

    lg_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[lg_bt_0005] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}