/* @tier hard @module py @transform payment-batch */
/*
 * py_bt_0002.pgc - 지급 전송파일 생성 배치 (확정건 고정길이 전문 write)  [tier=hard]
 *
 * 배치 main 엔트리 포함.  실행:  py_bt_0002 <YYYYMMDD> [db@host]
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

EXEC SQL INCLUDE sqlca;

static int run_py_bt_0002(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9], h_key[16], h_merch[16], h_acct[20];
    long h_amount, h_fee;
    EXEC SQL END DECLARE SECTION;

    FILE *fp;
    char path[80], raw[512], numbuf[16];
    acq_msg_t msg;
    long total = 0, written = 0, netsum = 0;

    strncpy(h_biz_date, biz_date, 8); h_biz_date[8] = '\0';
    snprintf(path, sizeof(path), "py_pay_%s.dat", biz_date);
    fp = fopen(path, "wb");
    if (!fp) {
        tx_log(TX_LOG_ERROR, "[py_bt_0002] 전송파일 생성 실패 %s", path);
        return TX_FAIL;
    }

    EXEC SQL DECLARE cur_payfile CURSOR FOR
        SELECT key, merch_id, card_no, amount, fee FROM py_ledger
        WHERE biz_date = :h_biz_date AND status = 'M'
        ORDER BY key;
    EXEC SQL OPEN cur_payfile;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_payfile");
        fclose(fp);
        return TX_EDB;
    }

    for (;;) {
        EXEC SQL FETCH cur_payfile INTO :h_key, :h_merch, :h_acct, :h_amount, :h_fee;
        if (sqlca.sqlcode == TX_SQL_NOTFOUND) break;
        if (sqlca.sqlcode != TX_SQL_OK) { TX_DBIO_LOG_ERR("FETCH cur_payfile"); break; }
        total++;

        /* 고정길이 지급전문(電文) 1레코드 구성 */
        memset(&msg, ' ', sizeof(msg));
        msg_field_set(msg.msg_type,   MSG_TYPE_RECON, FLD_MSG_TYPE_LEN);
        msg_field_set(msg.trans_code, "PAYOUT",       FLD_TRANS_CODE_LEN);
        msg_field_set(msg.merch_id,   h_merch,        FLD_MERCH_ID_LEN);
        msg_field_set(msg.card_no,    h_acct,         FLD_CARD_NO_LEN);
        msg_field_set(msg.approval_no, h_key,         FLD_APPROVAL_LEN);
        snprintf(numbuf, sizeof(numbuf), "%011ld", h_amount - h_fee);
        msg_field_set_num(msg.amount, numbuf,         FLD_AMOUNT_LEN);
        msg_field_set(msg.txn_date,   h_biz_date,     FLD_TXN_DATE_LEN);
        msg_field_set(msg.resp_code,  RESP_OK,        FLD_RESP_LEN);

        if (msg_pack(&msg, raw, sizeof(raw)) > 0 &&
            fwrite(raw, 1, (size_t)MSG_ACQ_LEN, fp) == (size_t)MSG_ACQ_LEN) {
            written++;
            netsum += h_amount - h_fee;
        }
    }
    EXEC SQL CLOSE cur_payfile;
    fclose(fp);

    printf("===== 지급 전송파일 생성 [py_bt_0002] =====\n");
    printf("  파일     : %s (레코드길이 %d)\n", path, MSG_ACQ_LEN);
    printf("  대상건수 : %ld\n", total);
    printf("  기록건수 : %ld\n", written);
    printf("  순지급액 : %ld\n", netsum);
    tx_log(TX_LOG_INFO, "[py_bt_0002] 전송파일 %s 기록=%ld net=%ld", path, written, netsum);
    return (written == total) ? 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, "[py_bt_0002] 배치 시작 date=%s", biz_date);
    rc = py_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[py_bt_0002] DB 접속 실패 rc=%d", rc);
        return 1;
    }
    rc = run_py_bt_0002(biz_date);
    py_dbio_disconnect();
    tx_log(TX_LOG_INFO, "[py_bt_0002] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}
