/* @tier medium @module au @transform authorization-batch */
/*
 * au_bt_0016.pgc - 가맹점별 승인율 산출 배치 (성공/전체 비율)  [tier=medium]
 *
 * 배치 main 엔트리 포함.  실행:  au_bt_0016 <YYYYMMDD> [db@host]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

static int run_au_bt_0016(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9], h_merch[16];
    int  h_ok, h_all;
    EXEC SQL END DECLARE SECTION;

    long merchants = 0;
    int  rate;

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

    EXEC SQL DECLARE cur_rate CURSOR FOR
        SELECT merch_id,
               count(*) FILTER (WHERE status IN ('M','S')),
               count(*)
        FROM au_ledger WHERE biz_date = :h_biz_date
        GROUP BY merch_id
        HAVING count(*) >= 1
        ORDER BY merch_id;
    EXEC SQL OPEN cur_rate;
    if (sqlca.sqlcode != TX_SQL_OK) { TX_DBIO_LOG_ERR("OPEN cur_rate"); return TX_EDB; }

    printf("===== 가맹점별 승인율 [au_bt_0016] date=%s =====\n", biz_date);
    for (;;) {
        EXEC SQL FETCH cur_rate INTO :h_merch, :h_ok, :h_all;
        if (sqlca.sqlcode == TX_SQL_NOTFOUND) break;
        if (sqlca.sqlcode != TX_SQL_OK) break;
        merchants++;
        rate = (h_all > 0) ? h_ok * 100 / h_all : 0;
        printf("  %-15s : %3d%% (%d/%d)\n", h_merch, rate, h_ok, h_all);
        if (rate < 50)
            tx_log(TX_LOG_WARN, "[au_bt_0016] 저승인율 merch=%s rate=%d%%", h_merch, rate);
    }
    EXEC SQL CLOSE cur_rate;
    printf("  집계 가맹점수=%ld\n", merchants);
    return TX_OK;
}

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, "[au_bt_0016] 배치 시작 date=%s", biz_date);
    rc = au_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[au_bt_0016] DB 접속 실패 rc=%d", rc);
        return 1;
    }
    rc = run_au_bt_0016(biz_date);
    au_dbio_disconnect();
    tx_log(TX_LOG_INFO, "[au_bt_0016] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}