/* @tier easy @module lg @transform ledger-batch */
/*
 * lg_bt_0014.pgc - 역분개 배치 (취소/불일치건 역분개 생성)  [tier=easy]
 *
 * 지정 영업일의 불일치(status='U') 원장을 커서로 순회하며 각 건에 대해
 * 반대부호(-amount)의 역분개행(key+'R', status 'M')을 INSERT 한다.
 * 역분개 건수/금액을 요약한다.
 *
 * 실행:  lg_bt_0014 <YYYYMMDD> [db@host]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "txcore.h"
#include "txcore_dbio.h"
#include "acq_util.h"
#include "lg_core.h"

EXEC SQL INCLUDE sqlca;

static int run_lg_bt_0014(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_key[16];
    char h_merch_id[16];
    char h_card_no[20];
    long h_amount;
    char h_rkey[16];
    long h_ramount;
    EXEC SQL END DECLARE SECTION;

    long total = 0, reversed = 0, errcnt = 0;
    long sum_rev = 0;
    char won[32];

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

    EXEC SQL DECLARE cur_lg_bt_0014 CURSOR FOR
        SELECT key, merch_id, card_no, amount
        FROM lg_ledger
        WHERE biz_date = :h_biz_date
          AND status   = 'U'
        ORDER BY key;

    EXEC SQL OPEN cur_lg_bt_0014;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_lg_bt_0014");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[lg_bt_0014] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_lg_bt_0014
            INTO :h_key, :h_merch_id, :h_card_no, :h_amount;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_lg_bt_0014");
            errcnt++;
            break;
        }

        total++;

        /* 역분개행: 원키(최대 14자) + 'R', 금액 반대부호, 상태 완료(M) */
        snprintf(h_rkey, sizeof(h_rkey), "%.14sR", h_key);
        h_ramount = -h_amount;

        EXEC SQL INSERT INTO lg_ledger
            (key, merch_id, card_no, amount, biz_date, status, fee)
            VALUES
            (:h_rkey, :h_merch_id, :h_card_no, :h_ramount, :h_biz_date, 'M', 0);

        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("INSERT 역분개 lg_bt_0014");
            errcnt++;
            continue;
        }
        reversed++;
        sum_rev += h_ramount;
    }

    EXEC SQL CLOSE cur_lg_bt_0014;

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

    amount_format_won(sum_rev, won, sizeof(won));

    tx_log(TX_LOG_INFO,
           "[lg_bt_0014] 요약 date=%s 대상=%ld 역분개=%ld 역분개액=%ld 오류=%ld",
           biz_date, total, reversed, sum_rev, errcnt);

    printf("========== 역분개 결과 [lg_bt_0014] ==========\n");
    printf("  영업일        : %s\n", biz_date);
    printf("  대상(U) 건수  : %ld\n", total);
    printf("  역분개 건수   : %ld\n", reversed);
    printf("  역분개 금액   : %s\n", won);
    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 영업일 '%s'\n", biz_date);
        return 2;
    }

    tx_log(TX_LOG_INFO, "[lg_bt_0014] 배치 시작 date=%s", biz_date);

    rc = lg_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[lg_bt_0014] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_lg_bt_0014(biz_date);

    lg_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[lg_bt_0014] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}