/* @tier easy @module vl @transform validation-batch */
/*
 * vl_bt_0005.pgc - 금액 허용오차 정합검증 배치 (VL_BT_0005)  [tier=easy]
 *
 * 지정 영업일 원장(vl_ledger) 과 승인원장(vl_approval) 을 조인하여
 * |원장금액 - 승인금액| 을 산출한다. 편차가 허용오차(TOLERANCE) 이내이면
 * 완료('M'), 초과이면 불일치('U') 로 전이한다. 배치 main 엔트리 포함.
 *
 * 실행:  vl_bt_0005 <YYYYMMDD> [db@host]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

#define VL_BT_0005_TOLERANCE  100L   /* 허용오차: 100원 */

static int run_vl_bt_0005(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_key[16];
    long h_ledger_amt;
    long h_appr_amt;
    char h_new_status[2];
    EXEC SQL END DECLARE SECTION;

    long total = 0, within = 0, over = 0, errcnt = 0;
    long diff, diff_sum = 0, max_diff = 0;
    int  rc;

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

    EXEC SQL DECLARE cur_vl_bt_0005 CURSOR FOR
        SELECT l.key, l.amount, a.appr_amount
        FROM vl_ledger l
        JOIN vl_approval a ON a.appr_no = l.key
        WHERE l.biz_date = :h_biz_date
          AND l.status   = 'R'
        ORDER BY l.key;

    EXEC SQL OPEN cur_vl_bt_0005;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_vl_bt_0005");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[vl_bt_0005] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_vl_bt_0005 INTO :h_key, :h_ledger_amt, :h_appr_amt;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_vl_bt_0005");
            errcnt++;
            break;
        }

        total++;
        diff = labs(h_ledger_amt - h_appr_amt);

        if (diff <= VL_BT_0005_TOLERANCE) {
            strncpy(h_new_status, VL_ST_DONE, sizeof(h_new_status));
            within++;
        } else {
            strncpy(h_new_status, VL_ST_FAIL, sizeof(h_new_status));
            over++;
            diff_sum += diff;
            if (diff > max_diff)
                max_diff = diff;
        }

        rc = vl_rec_update_status(h_key, h_new_status);
        if (rc != TX_OK) {
            tx_log(TX_LOG_ERROR, "[vl_bt_0005] 상태전이 실패 key=%s rc=%d", h_key, rc);
            errcnt++;
        }
    }

    EXEC SQL CLOSE cur_vl_bt_0005;

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

    tx_log(TX_LOG_INFO,
           "[vl_bt_0005] 요약 date=%s 대상=%ld 허용내=%ld 초과=%ld 오류=%ld",
           biz_date, total, within, over, errcnt);

    printf("========== 금액 허용오차 정합검증 [vl_bt_0005] ==========\n");
    printf("  영업일        : %s\n", biz_date);
    printf("  허용오차(원)  : %ld\n", VL_BT_0005_TOLERANCE);
    printf("  대상 건수     : %ld\n", total);
    printf("  허용내(M)     : %ld\n", within);
    printf("  초과(U)       : %ld\n", over);
    printf("  편차 합계     : %ld\n", diff_sum);
    printf("  최대 편차     : %ld\n", max_diff);
    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, "[vl_bt_0005] 배치 시작 date=%s", biz_date);

    rc = vl_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[vl_bt_0005] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_vl_bt_0005(biz_date);

    vl_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[vl_bt_0005] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}
