/*
 * lg_acctbal_batch.pgc - lg 계정잔액 일괄 재집계 배치 (단일 upsert) (XA 배치).
 *
 * ATMI client: tpinit/tpopen open the ECPG XA RM, tpbegin starts ONE global
 * transaction; EXEC SQL work runs on that branch, then tpcommit drives XA 2PC.
 * Usage: lg_acctbal_batch [YYYY-MM-DD]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <atmi.h>
#include "lg_dbio.h"

int main(int argc, char **argv)
{
    const char *bizdate = (argc > 1) ? argv[1] : "2026-07-19";
    EXEC SQL BEGIN DECLARE SECTION;
    char h_bizdate[16];
    long h_cnt;
    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 INSERT INTO lg_account_bal (acct, biz_date, debit_total, credit_total, balance)
        SELECT acct, :h_bizdate,
               coalesce(sum(CASE WHEN dc='D' THEN amount ELSE 0 END),0),
               coalesce(sum(CASE WHEN dc='C' THEN amount ELSE 0 END),0),
               coalesce(sum(CASE WHEN dc='D' THEN amount ELSE -amount END),0)
        FROM lg_ledger_line WHERE biz_date = :h_bizdate GROUP BY acct
        ON CONFLICT (acct, biz_date) DO UPDATE
        SET debit_total = EXCLUDED.debit_total, credit_total = EXCLUDED.credit_total,
            balance = EXCLUDED.balance, updated_at = now();
    if (sqlca.sqlcode < 0) { fprintf(stderr, "UPSERT FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); tpabort(0); return 1; }
    h_cnt = sqlca.sqlerrd[2];
    if (tpcommit(0) < 0) { fprintf(stderr, "tpcommit FAIL: %s\n", tpstrerror(tperrno)); tpabort(0); return 1; }
    printf(">>> lg_acctbal_batch COMMIT: bizdate=%s 계정=%ld건 재집계\n", bizdate, h_cnt);
    tpclose(); tpterm();
    return 0;
}
