/* @tier easy @module ac @transform acquire-batch */
/*
 * ac_bt_0010.pgc - 할부매입 전개 배치  [tier=easy]
 *
 * 지정 영업일에 접수된 할부매입 원거래(acq_type='INST', install_month>=2,
 * orig_key IS NULL) 를 회차별로 전개하여 자매입행(자녀행)을 생성한다.
 * 각 자녀행은 원거래를 orig_key 로 참조하며, 금액은 회차수로 균등 분할하고
 * 나머지(단수)는 1회차에 합산한다. 배치 main 엔트리 포함.
 *
 * 실행:  ac_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 "ac_core.h"

EXEC SQL INCLUDE sqlca;

static int run_ac_bt_0010(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;
    int  h_install_month;
    char h_child_key[16];
    long h_child_amount;
    char h_status[2];
    char h_acq_type[9];
    char h_orig_key[16];
    long h_fee;
    EXEC SQL END DECLARE SECTION;

    long parents = 0, children = 0, errcnt = 0;
    long monthly, remainder;
    int  m;
    char keybuf[16];

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

    EXEC SQL DECLARE cur_ac_bt_0010 CURSOR FOR
        SELECT key, merch_id, card_no, amount, install_month
        FROM ac_ledger
        WHERE biz_date      = :h_biz_date
          AND acq_type      = 'INST'
          AND install_month >= 2
          AND orig_key IS NULL
        ORDER BY key;

    EXEC SQL OPEN cur_ac_bt_0010;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_ac_bt_0010");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[ac_bt_0010] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_ac_bt_0010
            INTO :h_key, :h_merch_id, :h_card_no, :h_amount, :h_install_month;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_ac_bt_0010");
            errcnt++;
            break;
        }

        parents++;

        if (h_install_month < 2) {
            tx_log(TX_LOG_WARN, "[ac_bt_0010] 회차수 이상 key=%s month=%d, 건너뜀",
                   h_key, h_install_month);
            continue;
        }

        monthly   = h_amount / h_install_month;
        remainder = h_amount - (monthly * h_install_month);

        strncpy(h_orig_key, h_key, sizeof(h_orig_key) - 1);
        h_orig_key[sizeof(h_orig_key) - 1] = '\0';
        strncpy(h_acq_type, "INST", sizeof(h_acq_type) - 1);
        h_acq_type[sizeof(h_acq_type) - 1] = '\0';
        strncpy(h_status, AC_ST_RECV, sizeof(h_status));
        h_fee = 0;

        for (m = 1; m <= h_install_month; m++) {
            snprintf(keybuf, sizeof(keybuf), "%.12s-%02d", h_key, m);
            strncpy(h_child_key, keybuf, sizeof(h_child_key) - 1);
            h_child_key[sizeof(h_child_key) - 1] = '\0';

            h_child_amount = monthly;
            if (m == 1)
                h_child_amount += remainder;

            EXEC SQL INSERT INTO ac_ledger
                (key, merch_id, card_no, amount, biz_date, status, fee,
                 install_month, acq_type, orig_key)
                VALUES
                (:h_child_key, :h_merch_id, :h_card_no, :h_child_amount,
                 :h_biz_date, :h_status, :h_fee, :h_install_month,
                 :h_acq_type, :h_orig_key);

            if (sqlca.sqlcode != TX_SQL_OK) {
                TX_DBIO_LOG_ERR("INSERT ac_bt_0010 child");
                tx_log(TX_LOG_ERROR, "[ac_bt_0010] 자매입행 생성 실패 key=%s m=%d",
                       h_key, m);
                errcnt++;
                continue;
            }
            children++;
        }
    }

    EXEC SQL CLOSE cur_ac_bt_0010;

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

    tx_log(TX_LOG_INFO,
           "[ac_bt_0010] 요약 date=%s 원거래=%ld 전개행=%ld 오류=%ld",
           biz_date, parents, children, errcnt);

    printf("========== 할부매입 전개 결과 [ac_bt_0010] ==========\n");
    printf("  영업일        : %s\n", biz_date);
    printf("  원거래 건수   : %ld\n", parents);
    printf("  전개 행수     : %ld\n", children);
    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, "[ac_bt_0010] 배치 시작 date=%s", biz_date);

    rc = ac_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[ac_bt_0010] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_ac_bt_0010(biz_date);

    ac_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[ac_bt_0010] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}
