/* @tier easy @module py @transform payment-batch */
/*
 * py_bt_0001.pgc - 지급 배치 (커서 순회 + 상태전이)  [tier=easy]
 *
 * 지정 영업일의 접수(status='R') 건을 커서로 순회하며 업무규칙에 따라
 * 완료('M')/불일치('U') 로 상태를 전이한다. 배치 main 엔트리 포함.
 *
 * 실행:  py_bt_0001 <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_0001(const char *biz_date)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_biz_date[9];
    char h_key[16];
    char h_merch_id[16];
    long h_amount;
    char h_new_status[2];
    EXEC SQL END DECLARE SECTION;

    long total = 0, done = 0, unmatch = 0, errcnt = 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_py_bt_0001 CURSOR FOR
        SELECT key, merch_id, amount
        FROM py_ledger
        WHERE biz_date = :h_biz_date
          AND status   = 'R'
        ORDER BY key;

    EXEC SQL OPEN cur_py_bt_0001;
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("OPEN cur_py_bt_0001");
        return TX_EDB;
    }

    if (tx_begin() != TX_OK)
        tx_log(TX_LOG_WARN, "[py_bt_0001] tx_begin 경고");

    for (;;) {
        EXEC SQL FETCH cur_py_bt_0001 INTO :h_key, :h_merch_id, :h_amount;

        if (sqlca.sqlcode == TX_SQL_NOTFOUND)
            break;
        if (sqlca.sqlcode != TX_SQL_OK) {
            TX_DBIO_LOG_ERR("FETCH cur_py_bt_0001");
            errcnt++;
            break;
        }

        total++;

        /* 업무규칙: 금액 유효성으로 완료/불일치 판정 */
        if (amount_is_valid(h_amount)) {
            strncpy(h_new_status, PY_ST_DONE, sizeof(h_new_status));
            done++;
        } else {
            strncpy(h_new_status, PY_ST_FAIL, sizeof(h_new_status));
            unmatch++;
        }

        rc = py_rec_update_status(h_key, h_new_status);
        if (rc != TX_OK) {
            tx_log(TX_LOG_ERROR, "[py_bt_0001] 상태전이 실패 key=%s rc=%d", h_key, rc);
            errcnt++;
        }
    }

    EXEC SQL CLOSE cur_py_bt_0001;

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

    tx_log(TX_LOG_INFO,
           "[py_bt_0001] 요약 date=%s 대상=%ld 완료=%ld 불일치=%ld 오류=%ld",
           biz_date, total, done, unmatch, errcnt);

    printf("========== 지급 배치 결과 [py_bt_0001] ==========\n");
    printf("  영업일      : %s\n", biz_date);
    printf("  대상 건수   : %ld\n", total);
    printf("  완료(M)     : %ld\n", done);
    printf("  불일치(U)   : %ld\n", unmatch);
    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, "[py_bt_0001] 배치 시작 date=%s", biz_date);

    rc = py_dbio_connect(target);
    if (rc != TX_OK) {
        tx_log(TX_LOG_ERROR, "[py_bt_0001] DB 접속 실패 rc=%d", rc);
        return 1;
    }

    rc = run_py_bt_0001(biz_date);

    py_dbio_disconnect();

    tx_log(TX_LOG_INFO, "[py_bt_0001] 배치 종료 rc=%d(%s)", rc, tx_strerror(rc));
    return (rc == TX_OK) ? 0 : 1;
}
