/*
 * st_offset_batch.pgc - 상계 정산 배치 (XA 배치).
 * 정산 net vs 매입 net 차이를 커서로 순회하여 상계 조정 기록.
 * 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: st_offset_batch [YYYY-MM-DD]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <atmi.h>
#include "st_dbio.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_pid, h_snet, h_pnet;
    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 st_offset_batch_c CURSOR FOR
        SELECT s.purchase_id, coalesce(sum(s.net),0), coalesce(max(p.net),0)
        FROM settlement s JOIN purchase p ON p.purchase_id=s.purchase_id
        WHERE s.biz_date=:h_bizdate GROUP BY s.purchase_id;
    EXEC SQL OPEN st_offset_batch_c;
    if (sqlca.sqlcode < 0) { fprintf(stderr, "OPEN FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); tpabort(0); return 1; }
    for (;;) {
        EXEC SQL FETCH st_offset_batch_c INTO :h_pid, :h_snet, :h_pnet;
        if (sqlca.sqlcode == 100) break;
        if (sqlca.sqlcode < 0) { fprintf(stderr, "FETCH FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); EXEC SQL CLOSE st_offset_batch_c; tpabort(0); return 1; }
        {
            long d = h_pnet - h_snet;
            if (d != 0) {
                if (stdb_insert_adjust(0, h_pid, d, "OFFSET", bizdate) < 0) { EXEC SQL CLOSE st_offset_batch_c; tpabort(0); return 1; }
                rows++;
            }
        }
    }
    EXEC SQL CLOSE st_offset_batch_c;

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

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