/* @tier medium @module mm @transform master-batch */
/*
 * mm_bt_0016.pgc - 마스터 통계집계 배치 (MM_BT_0016)  [tier=medium]
 *
 * 가맹점 원장(mm_merchant) 을 대상으로 상태별/등급별 가맹점 수를 집계
 * SELECT(SELECT ... INTO) 로 산출하여 일별 통계(mm_stat_daily) 에 한 행을
 * INSERT 한다. 커서 순회 대신 집계쿼리를 사용하는 통계 배치이다.
 * 배치 main 엔트리 포함.
 *
 * 실행:  mm_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 "mm_core.h"

EXEC SQL INCLUDE sqlca;

static int run_mm_bt_0016(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    long h_total;
    long h_cnt_active;
    long h_cnt_dormant;
    long h_cnt_recv;
    long h_cnt_a;
    long h_cnt_b;
    long h_cnt_c;
    EXEC SQL END DECLARE SECTION;

    long errcnt = 0;

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

    h_total = h_cnt_active = h_cnt_dormant = h_cnt_recv = 0;
    h_cnt_a = h_cnt_b = h_cnt_c = 0;

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[mm_bt_0016] tx_begin 경고");

    /* 상태별 집계 (조건부 합계) */
    EXEC SQL SELECT
                 COUNT(*),
                 SUM(CASE WHEN status = 'M' THEN 1 ELSE 0 END),
                 SUM(CASE WHEN status = 'U' THEN 1 ELSE 0 END),
                 SUM(CASE WHEN status = 'R' THEN 1 ELSE 0 END)
             INTO :h_total, :h_cnt_active, :h_cnt_dormant, :h_cnt_recv
             FROM mm_merchant;
    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT status agg");
        errcnt++;
    }

    /* 등급별 집계 (유효 가맹점 한정) */
    EXEC SQL SELECT
                 SUM(CASE WHEN grade = 'A' THEN 1 ELSE 0 END),
                 SUM(CASE WHEN grade = 'B' THEN 1 ELSE 0 END),
                 SUM(CASE WHEN grade = 'C' THEN 1 ELSE 0 END)
             INTO :h_cnt_a, :h_cnt_b, :h_cnt_c
             FROM mm_merchant
             WHERE status = 'M';
    if (sqlca.sqlcode != TX_SQL_OK && sqlca.sqlcode != TX_SQL_NOTFOUND) {
        TX_DBIO_LOG_ERR("SELECT grade agg");
        errcnt++;
    }

    if (errcnt == 0) {
        EXEC SQL INSERT INTO mm_stat_daily
                     (stat_date, total_cnt, active_cnt, dormant_cnt,
                      recv_cnt, grade_a_cnt, grade_b_cnt, grade_c_cnt)
                 VALUES (:h_biz_date, :h_total, :h_cnt_active,
                         :h_cnt_dormant, :h_cnt_recv,
                         :h_cnt_a, :h_cnt_b, :h_cnt_c);
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("INSERT mm_stat_daily");
            errcnt++;
        }
    }

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

    tx_log(TX_LOG_INFO,
           "[mm_bt_0016] 요약 date=%s 전체=%ld 유효=%ld 휴면=%ld 접수=%ld 오류=%ld",
           biz_date, h_total, h_cnt_active, h_cnt_dormant, h_cnt_recv, errcnt);

    printf("========== 마스터 통계집계 배치 [mm_bt_0016] ==========\n");
    printf("  집계일       : %s\n", biz_date);
    printf("  전체 가맹점  : %ld\n", h_total);
    printf("  유효(M)      : %ld\n", h_cnt_active);
    printf("  휴면(U)      : %ld\n", h_cnt_dormant);
    printf("  접수(R)      : %ld\n", h_cnt_recv);
    printf("  등급 A/B/C   : %ld / %ld / %ld\n", h_cnt_a, h_cnt_b, h_cnt_c);
    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_0016] 배치 시작 date=%s", biz_date);

    rc = mm_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[mm_bt_0016] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_mm_bt_0016(biz_date);

    mm_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[mm_bt_0016] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}
