/* @tier easy @module mm @transform master-batch */
/*
 * mm_bt_0006.pgc - 한도 마스터 갱신배치 (MM_BT_0006)  [tier=easy]
 *
 * 가맹점(mm_merchant) 과 등급별 기준한도(mm_grade_limit) 를 조인한 결과를
 * 커서로 순회하며, 가맹점별 승인한도(mm_limit) 를 등급 기준한도로 갱신한다.
 * 배치 main 엔트리 포함.
 *
 * 실행:  mm_bt_0006 <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;

static int run_mm_bt_0006(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_merch_id[16];
    char h_grade[2];
    long h_base_limit;
    EXEC SQL END DECLARE SECTION;

    long total = 0, updated = 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_0006 CURSOR FOR
        SELECT m.merch_id, m.grade, g.base_limit
        FROM mm_merchant m
        JOIN mm_grade_limit g ON g.grade = m.grade
        WHERE m.status = 'M'
        ORDER BY m.merch_id;

    EXEC SQL OPEN cur_mm_bt_0006;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_mm_bt_0006");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[mm_bt_0006] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_mm_bt_0006
            INTO :h_merch_id, :h_grade, :h_base_limit;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_mm_bt_0006");
            errcnt++;
            break;
        }

        total++;

        EXEC SQL UPDATE mm_limit
                    SET limit_amt  = :h_base_limit,
                        apply_date = :h_biz_date
                  WHERE merch_id = :h_merch_id;
        if (sqlca.sqlcode != TX_SQL_OK) {
            tx_log(TX_LOG_ERROR,
                   "[mm_bt_0006] 한도갱신 실패 merch=%s grade=%s",
                   h_merch_id, h_grade);
            errcnt++;
            continue;
        }

        updated++;
    }

    EXEC SQL CLOSE cur_mm_bt_0006;

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

    tx_log(TX_LOG_INFO,
           "[mm_bt_0006] 요약 date=%s 대상=%ld 갱신=%ld 오류=%ld",
           biz_date, total, updated, errcnt);

    printf("========== 한도 마스터 갱신배치 [mm_bt_0006] ==========\n");
    printf("  기준일       : %s\n", biz_date);
    printf("  대상 건수    : %ld\n", total);
    printf("  한도 갱신    : %ld\n", updated);
    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_0006] 배치 시작 date=%s", biz_date);

    rc = mm_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[mm_bt_0006] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_mm_bt_0006(biz_date);

    mm_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[mm_bt_0006] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}
