/* @tier easy @module mm @transform master-batch */
/*
 * mm_bt_0013.pgc - 정산주기 재설정 배치 (MM_BT_0013)  [tier=easy]
 *
 * 가맹점(mm_merchant) 을 커서로 순회하며 등급과 최근 거래량(txn_cnt) 기준
 * 으로 정산주기(settle_cycle) 를 재설정한다. 우량(A등급 또는 대량거래) 은
 * D+1, 그 외는 D+2 를 적용하며, 변경건은 원장 UPDATE 후 정산주기 변경
 * 이력(mm_cycle_hist) 을 남긴다. 배치 main 엔트리 포함.
 *
 * 실행:  mm_bt_0013 <YYYYMMDD> [db@host]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

/* 대량거래 기준 건수 */
#define MM_BULK_TXN_MIN  1000L

static int run_mm_bt_0013(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_merch_id[16];
    char h_grade[2];
    char h_old_cycle[4];
    char h_new_cycle[4];
    long h_txn_cnt;
    EXEC SQL END DECLARE SECTION;

    long total = 0, changed = 0, kept = 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_mm_bt_0013 CURSOR FOR
        SELECT merch_id, grade, settle_cycle, txn_cnt
        FROM mm_merchant
        WHERE status = 'M'
        ORDER BY merch_id;

    EXEC SQL OPEN cur_mm_bt_0013;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_mm_bt_0013");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[mm_bt_0013] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_mm_bt_0013
            INTO :h_merch_id, :h_grade, :h_old_cycle, :h_txn_cnt;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_mm_bt_0013");
            errcnt++;
            break;
        }

        total++;

        /* 우량 가맹점은 D+1, 그 외 D+2 */
        if (strcmp(h_grade, "A") == 0 || h_txn_cnt >= MM_BULK_TXN_MIN)
            strncpy(h_new_cycle, "D+1", sizeof(h_new_cycle));
        else
            strncpy(h_new_cycle, "D+2", sizeof(h_new_cycle));

        if (strcmp(h_new_cycle, h_old_cycle) == 0) {
            kept++;
            continue;
        }

        EXEC SQL UPDATE mm_merchant
                    SET settle_cycle = :h_new_cycle,
                        cycle_date   = :h_biz_date
                  WHERE merch_id = :h_merch_id;
        if (sqlca.sqlcode != TX_SQL_OK) {
            tx_log(TX_LOG_ERROR,
                   "[mm_bt_0013] 주기갱신 실패 merch=%s", h_merch_id);
            errcnt++;
            continue;
        }

        EXEC SQL INSERT INTO mm_cycle_hist
                     (merch_id, old_cycle, new_cycle, chg_date)
                 VALUES (:h_merch_id, :h_old_cycle, :h_new_cycle,
                         :h_biz_date);

        changed++;
    }

    EXEC SQL CLOSE cur_mm_bt_0013;

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

    tx_log(TX_LOG_INFO,
           "[mm_bt_0013] 요약 date=%s 대상=%ld 변경=%ld 유지=%ld 오류=%ld",
           biz_date, total, changed, kept, errcnt);

    printf("========== 정산주기 재설정 [mm_bt_0013] ==========\n");
    printf("  기준일       : %s\n", biz_date);
    printf("  대상 건수    : %ld\n", total);
    printf("  주기 변경    : %ld\n", changed);
    printf("  주기 유지    : %ld\n", kept);
    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 기준일 '%s'\n", biz_date);
        return 2;
    }

    tx_log(TX_LOG_INFO, "[mm_bt_0013] 배치 시작 date=%s", biz_date);

    rc = mm_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[mm_bt_0013] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_mm_bt_0013(biz_date);

    mm_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[mm_bt_0013] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}
