/* @tier easy @module vl @transform validation-batch */
/*
 * vl_bt_0010.pgc - 정산금액 정합검증 배치 (VL_BT_0010)  [tier=easy]
 *
 * 지정 영업일 정산원장(vl_settle) 을 커서로 순회하며, 정산 항등식
 * (매입금액 - 수수료 = 정산액) 을 검증한다. 항등식이 성립하지 않는
 * 건은 불일치('U'), 성립건은 정산완료('S') 로 전이하고 집계한다.
 * 배치 main 엔트리 포함.
 *
 * 실행:  vl_bt_0010 <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;

static int run_vl_bt_0010(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_settle_key[16];
    long h_pur_amt;
    long h_fee_amt;
    long h_settle_amt;
    char h_new_status[2];
    EXEC SQL END DECLARE SECTION;

    long total = 0, ok = 0, mismatch = 0, errcnt = 0;
    long expected, diff, settle_sum = 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_0010 CURSOR FOR
        SELECT s.settle_key, s.pur_amount, s.fee_amount, s.settle_amount
        FROM vl_settle s
        WHERE s.biz_date = :h_biz_date
          AND s.status   = 'R'
        ORDER BY s.settle_key;

    EXEC SQL OPEN cur_vl_bt_0010;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_vl_bt_0010");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[vl_bt_0010] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_vl_bt_0010
            INTO :h_settle_key, :h_pur_amt, :h_fee_amt, :h_settle_amt;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_vl_bt_0010");
            errcnt++;
            break;
        }

        total++;

        /* 정산 항등식: 매입 - 수수료 = 정산액 */
        expected = h_pur_amt - h_fee_amt;
        diff = labs(expected - h_settle_amt);

        if (diff == 0) {
            strncpy(h_new_status, VL_ST_SETTLED, sizeof(h_new_status));
            ok++;
            settle_sum += h_settle_amt;
        } else {
            strncpy(h_new_status, VL_ST_FAIL, sizeof(h_new_status));
            mismatch++;
            tx_log(TX_LOG_WARN,
                   "[vl_bt_0010] 정산불일치 key=%s 기대=%ld 실제=%ld 차=%ld",
                   h_settle_key, expected, h_settle_amt, diff);
        }

        rc = vl_rec_update_status(h_settle_key, h_new_status);
        if (rc != TX_OK) {
            tx_log(TX_LOG_ERROR, "[vl_bt_0010] 상태전이 실패 key=%s rc=%d",
                   h_settle_key, rc);
            errcnt++;
        }
    }

    EXEC SQL CLOSE cur_vl_bt_0010;

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

    tx_log(TX_LOG_INFO,
           "[vl_bt_0010] 요약 date=%s 대상=%ld 정산완료=%ld 불일치=%ld 오류=%ld",
           biz_date, total, ok, mismatch, errcnt);

    printf("========== 정산금액 정합검증 [vl_bt_0010] ==========\n");
    printf("  영업일        : %s\n", biz_date);
    printf("  대상 건수     : %ld\n", total);
    printf("  정산완료(S)   : %ld\n", ok);
    printf("  불일치(U)     : %ld\n", mismatch);
    printf("  정산금액 합계 : %ld\n", settle_sum);
    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_0010] 배치 시작 date=%s", biz_date);

    rc = vl_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[vl_bt_0010] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_vl_bt_0010(biz_date);

    vl_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[vl_bt_0010] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}