/* @tier easy @module vl @transform validation-online */
/*
 * vl_ol_0025.pgc - 거래일자 범위 검증 서비스 (VL_OL_0025)  [tier=easy]
 *
 * 입력 시작일/종료일의 유효성과 순서를 검증한 뒤, 대상 원장건의 거래일이
 * 지정 범위 내에 있는지 조회하여 판정한다.
 */
#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;

TX_SERVICE(VL_OL_0025, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    char h_from[9];
    char h_to[9];
    long h_inrange;
    char h_txn_date[9];
    EXEC SQL END DECLARE SECTION;

    char key[16];
    char from_dt[16];
    char to_dt[16];

    tx_log(TX_LOG_INFO, "[VL_OL_0025] 거래일자 범위 검증 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK ||
        tx_buf_get(ctx->in, "FROMDT", from_dt, sizeof(from_dt)) != TX_OK ||
        tx_buf_get(ctx->in, "TODT", to_dt, sizeof(to_dt)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0025] 필수 필드(KEY/FROMDT/TODT) 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2500");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    if (!date_is_valid(from_dt) || !date_is_valid(to_dt)) {
        tx_log(TX_LOG_WARN, "[VL_OL_0025] 일자 형식 오류 from=%s to=%s",
               from_dt, to_dt);
        tx_buf_sets(ctx->out, "ERRCODE", "VL2501");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    if (strcmp(from_dt, to_dt) > 0) {
        tx_log(TX_LOG_WARN, "[VL_OL_0025] 범위 역전 from=%s to=%s",
               from_dt, to_dt);
        tx_buf_sets(ctx->out, "ERRCODE", "VL2502");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    strncpy(h_key, key, sizeof(h_key) - 1);
    h_key[sizeof(h_key) - 1] = '\0';
    strncpy(h_from, from_dt, sizeof(h_from) - 1);
    h_from[sizeof(h_from) - 1] = '\0';
    strncpy(h_to, to_dt, sizeof(h_to) - 1);
    h_to[sizeof(h_to) - 1] = '\0';

    memset(h_txn_date, 0, sizeof(h_txn_date));
    h_inrange = 0;

    EXEC SQL SELECT txn_date,
               CASE WHEN txn_date BETWEEN :h_from AND :h_to THEN 1 ELSE 0 END
          INTO :h_txn_date, :h_inrange
          FROM vl_ledger
         WHERE txn_key = :h_key;

    if (sqlca.sqlcode == TX_SQL_NOTFOUND) {
        tx_log(TX_LOG_WARN, "[VL_OL_0025] 원장 없음 key=%s", key);
        tx_buf_sets(ctx->out, "ERRCODE", "VL2503");
        tx_return(ctx, TX_ENOENT, ctx->out);
        return;
    }
    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("SELECT vl_ledger 범위검증");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2509");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_sets(ctx->out, "TXNDATE", h_txn_date);
    tx_buf_sets(ctx->out, "FROMDT", from_dt);
    tx_buf_sets(ctx->out, "TODT", to_dt);

    if (h_inrange != 1) {
        tx_log(TX_LOG_WARN, "[VL_OL_0025] 범위 밖 key=%s txn=%s", key, h_txn_date);
        tx_buf_sets(ctx->out, "RESULT", "OUTOFRANGE");
        tx_buf_sets(ctx->out, "ERRCODE", "VL2504");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }

    tx_buf_sets(ctx->out, "RESULT", "INRANGE");
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[VL_OL_0025] 범위내 key=%s txn=%s", key, h_txn_date);
    tx_return(ctx, TX_OK, ctx->out);
}