/* @tier medium @module vl @transform validation-online */
/*
 * vl_ol_0009.pgc - 필수항목 존재/형식 검증 서비스 (VL_OL_0009)
 *
 * 전문 필수항목(가맹점ID/카드번호/승인번호/금액) 의 존재 및 형식(길이/숫자)을
 * 검증한다. 누락/형식오류 항목명을 누적하여 목록으로 응답하고, 하나라도 실패면
 * 불일치(VL09xx). 검증 결과는 항목검증 이력(vl_field_chk_hist) 에 적재한다.
 */
#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 is_all_digit(const char *s)
{
    int i;
    if (s == NULL || s[0] == '\0')
        return 0;
    for (i = 0; s[i] != '\0'; i++) {
        if (s[i] < '0' || s[i] > '9')
            return 0;
    }
    return 1;
}

TX_SERVICE(VL_OL_0009, ctx)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_key[16];
    char h_missing[128];
    long h_fail_cnt;
    EXEC SQL END DECLARE SECTION;

    char key[16], merch[16], card[20], approval[12], amtstr[16];
    char missing[128];
    long amount = 0;
    int  fail = 0;

    tx_log(TX_LOG_INFO, "[VL_OL_0009] 필수항목 검증 서비스 진입");

    if (tx_buf_get(ctx->in, "KEY", key, sizeof(key)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[VL_OL_0009] KEY 누락");
        tx_buf_sets(ctx->out, "ERRCODE", "VL0900");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    missing[0] = '\0';

    /* 1) 가맹점ID: 존재 + 숫자/영숫자 길이 */
    if (tx_buf_get(ctx->in, "MERCHID", merch, sizeof(merch)) != TX_OK ||
        strlen(merch) < 6) {
        strncat(missing, "MERCHID;", sizeof(missing) - strlen(missing) - 1);
        fail++;
    }

    /* 2) 카드번호: 존재 + 12자리 이상 숫자 */
    if (tx_buf_get(ctx->in, "CARDNO", card, sizeof(card)) != TX_OK ||
        strlen(card) < 12 || !is_all_digit(card)) {
        strncat(missing, "CARDNO;", sizeof(missing) - strlen(missing) - 1);
        fail++;
    }

    /* 3) 승인번호: 존재 + 숫자 */
    if (tx_buf_get(ctx->in, "APPROVALNO", approval, sizeof(approval)) != TX_OK ||
        !is_all_digit(approval)) {
        strncat(missing, "APPROVALNO;", sizeof(missing) - strlen(missing) - 1);
        fail++;
    }

    /* 4) 금액: 존재 + 범위 유효 */
    if (tx_buf_get(ctx->in, "AMOUNT", amtstr, sizeof(amtstr)) != TX_OK) {
        strncat(missing, "AMOUNT;", sizeof(missing) - strlen(missing) - 1);
        fail++;
    } else {
        amount = atol(amtstr);
        if (!amount_is_valid(amount)) {
            strncat(missing, "AMOUNT;", sizeof(missing) - strlen(missing) - 1);
            fail++;
        }
    }

    /* 5) 항목검증 이력 적재 */
    strncpy(h_key, key, sizeof(h_key) - 1);          h_key[sizeof(h_key) - 1] = '\0';
    strncpy(h_missing, (missing[0] ? missing : "-"), sizeof(h_missing) - 1);
    h_missing[sizeof(h_missing) - 1] = '\0';
    h_fail_cnt = fail;

    EXEC SQL INSERT INTO vl_field_chk_hist
            (chk_key, fail_count, missing_fields)
        VALUES
            (:h_key, :h_fail_cnt, :h_missing);

    if (sqlca.sqlcode != TX_SQL_OK) {
        TX_DBIO_LOG_ERR("INSERT vl_field_chk_hist");
        tx_buf_sets(ctx->out, "ERRCODE", "VL0909");
        tx_return(ctx, TX_EDB, ctx->out);
        return;
    }

    /* 6) 판정 */
    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "KEY", key);
    tx_buf_setlong(ctx->out, "FAILCNT", fail);
    tx_buf_sets(ctx->out, "MISSING", (missing[0] ? missing : "-"));

    if (fail > 0) {
        tx_log(TX_LOG_WARN, "[VL_OL_0009] 필수항목 검증 실패 key=%s missing=%s",
               key, missing);
        tx_buf_sets(ctx->out, "RESULT", "MISMATCH");
        tx_buf_sets(ctx->out, "ERRCODE", "VL0903");
        tx_return(ctx, TX_OK, ctx->out);
        return;
    }

    tx_buf_sets(ctx->out, "RESULT", "MATCH");
    tx_buf_sets(ctx->out, "ERRCODE", RESP_OK);
    tx_log(TX_LOG_INFO, "[VL_OL_0009] 필수항목 정상 key=%s", key);
    tx_return(ctx, TX_OK, ctx->out);
}