/*
 * lg_spantb_batch.pgc - 기간 시산표 배치: 기간 계정별 차대 합계를 시산표(마감일자)로 upsert (커서 + XA).
 *
 * 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.
 * 복식부기: 차변(D) 합 = 대변(C) 합. Usage: lg_spantb_batch [YYYY-MM-DD] [FROM|arg]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <atmi.h>
#include "lg_dbio.h"
#include "lg_spantb_batch.h"

int main(int argc, char **argv)
{
    const char *bizdate = (argc > 1) ? argv[1] : "2026-07-19";
    const char *fromd = (argc > 2) ? argv[2] : bizdate;
    EXEC SQL BEGIN DECLARE SECTION;
    char h_bizdate[16], h_from[16], h_acct[32], h_type[16];
    long h_dr, h_cr;
    EXEC SQL END DECLARE SECTION;
    strncpy(h_bizdate, bizdate, sizeof(h_bizdate)-1); h_bizdate[sizeof(h_bizdate)-1] = 0;
    strncpy(h_from, fromd, sizeof(h_from)-1); h_from[sizeof(h_from)-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; }
        long rows = 0, net_diff = 0;
        EXEC SQL DECLARE stb CURSOR FOR
            SELECT acct,
                   coalesce(sum(CASE WHEN dc = 'D' THEN amount ELSE 0 END), 0),
                   coalesce(sum(CASE WHEN dc = 'C' THEN amount ELSE 0 END), 0)
            FROM lg_ledger_line WHERE biz_date BETWEEN :h_from AND :h_bizdate
            GROUP BY acct ORDER BY acct;
        EXEC SQL OPEN stb;
        if (sqlca.sqlcode < 0) { fprintf(stderr, "OPEN FAIL [%d] %s\n", sqlca.sqlcode, sqlca.sqlerrm.sqlerrmc); tpabort(0); return 1; }
        for (;;) {
            EXEC SQL FETCH stb INTO :h_acct, :h_dr, :h_cr;
            if (sqlca.sqlcode == 100) break;
            if (sqlca.sqlcode < 0) { EXEC SQL CLOSE stb; tpabort(0); return 1; }
            EXEC SQL INSERT INTO lg_trial_bal (acct, biz_date, debit_total, credit_total, diff)
                VALUES (:h_acct, :h_bizdate, :h_dr, :h_cr, :h_dr - :h_cr)
                ON CONFLICT (acct, biz_date) DO UPDATE
                SET debit_total = EXCLUDED.debit_total, credit_total = EXCLUDED.credit_total,
                    diff = EXCLUDED.diff, updated_at = now();
            if (sqlca.sqlcode < 0) { EXEC SQL CLOSE stb; tpabort(0); return 1; }
            net_diff += h_dr - h_cr; rows++;
        }
        EXEC SQL CLOSE stb;
        printf("    기간 %s~%s 계정 %ld 총차액 %ld %s\n", fromd, bizdate, rows, net_diff,
               (net_diff == 0) ? "(균형)" : "(불균형!)");
    if (tpcommit(0) < 0) { fprintf(stderr, "tpcommit FAIL: %s\n", tpstrerror(tperrno)); tpabort(0); return 1; }
    printf(">>> lg_spantb_batch COMMIT: bizdate=%s\n", bizdate);
    tpclose(); tpterm();
    return 0;
}
