/*
 * rc_monthrate_batch.pgc - 월별 대사율 집계 배치 (커서 + XA): 기준 월 소속 매입을 가맹점별로 묶어 대사완료율을 rc_match_log 에 남긴다.
 * ATMI 클라이언트: tpinit/tpopen 으로 ECPG XA RM 를 열고 tpbegin 으로 ONE global tx
 * 를 시작, EXEC SQL 수행 후 tpcommit 이 XA 2PC 를 구동. 사용법: rc_monthrate_batch [YYYY-MM-DD]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <atmi.h>
#include "rc_monthrate_batch.h"

int main(int argc, char **argv)
{
    const char *bizdate = (argc > 1) ? argv[1] : "2026-07-19";
    long rows = 0;
    EXEC SQL BEGIN DECLARE SECTION;
    char h_bizdate[16];
    long h_id, h_total, h_done;
    char h_mid[64];
    EXEC SQL END DECLARE SECTION;

    strncpy(h_bizdate, bizdate, sizeof(h_bizdate)-1); h_bizdate[sizeof(h_bizdate)-1] = 0;

    if (tpinit(NULL) < 0) { fprintf(stderr, "tpinit FAIL: %s\n", tpstrerror(tperrno)); return 1; }
    if (tpopen() < 0)     { fprintf(stderr, "tpopen FAIL: %s\n", tpstrerror(tperrno)); return 1; }
    if (tpbegin(60, 0) < 0) { fprintf(stderr, "tpbegin FAIL: %s\n", tpstrerror(tperrno)); return 1; }

    EXEC SQL DECLARE bcur CURSOR FOR
        SELECT merchant_id, count(*),
               count(*) FILTER (WHERE status IN ('M','S'))
        FROM purchase
        WHERE date_trunc('month', biz_date) = date_trunc('month', :h_bizdate::date)
        GROUP BY merchant_id ORDER BY merchant_id;
    EXEC SQL OPEN bcur;
    if (sqlca.sqlcode < 0) { fprintf(stderr, "OPEN FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); tpabort(0); return 1; }

    for (;;) {
        EXEC SQL FETCH bcur INTO :h_mid, :h_total, :h_done;
        if (sqlca.sqlcode == 100) break;
        if (sqlca.sqlcode < 0) { fprintf(stderr, "FETCH FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); EXEC SQL CLOSE bcur; tpabort(0); return 1; }
        EXEC SQL SELECT nextval('rc_match_seq') INTO :h_id;
        EXEC SQL INSERT INTO rc_match_log (match_id, purchase_id, match_type, amount, status, biz_date)
            VALUES (:h_id, 0, 'MON_RATE', :h_done, 'MATCHED', :h_bizdate);
        if (sqlca.sqlcode < 0) { fprintf(stderr, "INS FAIL [%d]\n", sqlca.sqlcode); EXEC SQL CLOSE bcur; tpabort(0); return 1; }
        rows++;
    }
    EXEC SQL CLOSE bcur;

    if (tpcommit(0) < 0) { fprintf(stderr, "tpcommit FAIL: %s\n", tpstrerror(tperrno)); tpabort(0); return 1; }
    printf(">>> rc_monthrate_batch COMMIT: month-of=%s merchants=%ld\n", bizdate, rows);

    tpclose(); tpterm();
    return 0;
}
